IF 4.1 2区化学 Q2 POLYMER SCIENCE

Polymer

Pub Date : 2024-11-06 DOI: 10.1016/j.polymer.2024.127798

Mohammed A.M.M. Al-Samet , Simge Kara , Engin Burgaz

In this study, fibrous membrane composites containing poly (vinylidene fluoride-co-hexafluoropropylene) P(VdF-co-HFP) copolymer and various amounts of magnesium borate Mg₂B₂O₅ were prepared via electrospinning method. The crystallization behavior, thermal stability, microstructure, porosity, liquid electrolyte uptake and electrochemical performance of electrospun membranes were investigated in detail. X-ray diffraction (XRD) and differential scanning calorimetry (DSC) show that, the crystallinity of P(VdF-co-HFP) tends to decrease with increasing amount of Mg₂B₂O₅ particles. The electrospun membrane containing P(VdF-co-HFP) and 2.5 wt% of Mg₂B₂O₅ demonstrates stronger anti-shrinkage properties compared to those of commercial polypropylene (PP) or pure P(VdF-co-HFP) separators at 140 °C. The fibrous membrane consisting of 2.5 wt% Mg₂B₂O₅ exhibits high electrolyte uptake (381 %), low interfacial resistance and good porosity at room temperature (81 %), even after heating at 140 °C the porosity becomes 78 %. Moreover, Li||LiFePO₄ cell using P(VdF-co-HFP) separator with 2.5 wt% of Mg₂B₂O₅ shows better discharge capacities of 167.5 and 146.8 mAh g⁻¹ at 0.2 C and 5 C, respectively, compared to those of commercial PP separator which delivers only 158 and 127 mAh g⁻¹ at 0.2 C and 5 C, respectively. [P(VdF-co-HFP) + 2.5 wt% Mg₂B₂O₅] separator also provides discharge capacity retention of 99.9 % after 100 cycles at 9 C, in comparison with only 87 % for polypropylene separator. Such results reveal that P(VdF-co-HFP) membrane containing 2.5 wt% Mg₂B₂O₅ is a highly promising separator with good safety which can be used in high-performance lithium-ion batteries.

本研究通过电纺丝方法制备了含有聚偏氟乙烯-六氟丙烯（P(VdF-co-HFP)共聚物和不同量的硼酸镁 Mg2B2O5 的纤维膜复合材料。详细研究了电纺丝膜的结晶行为、热稳定性、微观结构、孔隙率、液体电解质吸收和电化学性能。X 射线衍射（XRD）和差示扫描量热法（DSC）显示，P(VdF-co-HFP)的结晶度随着 Mg2B2O5 颗粒含量的增加而降低。与商用聚丙烯（PP）或纯 P（VdF-co-HFP）分离剂相比，含有 P（VdF-co-HFP）和 2.5 wt.% Mg2B2O5 的电纺膜在 140 °C 下具有更强的抗收缩性能。由 2.5 wt.% Mg2B2O5 组成的纤维膜在室温下具有高电解质吸收率（381%）、低界面电阻和良好的孔隙率（81%），即使在 140 °C 下加热后，孔隙率也达到了 78%。此外，使用含有 2.5 wt.% Mg2B2O5 的 P（VdF-co-HFP）隔膜的 Li||LiFePO4 电池在 0.2 摄氏度和 5 摄氏度时的放电容量分别为 167.5 mAh g-1 和 146.8 mAh g-1，而使用商用 PP 隔膜的电池在 0.2 摄氏度和 5 摄氏度时的放电容量分别只有 158 mAh g-1 和 127 mAh g-1。[P(VdF-co-HFP) + 2.5 wt.% Mg2B2O5]分离器在 9 C 下循环 100 次后，放电容量保持率也达到 99.9%，而聚丙烯分离器的放电容量保持率仅为 87%。这些结果表明，含有 2.5 wt.% Mg2B2O5 的 P（VdF-co-HFP）膜是一种极具潜力的隔膜，具有良好的安全性，可用于高性能锂离子电池。

{"title":"Enhancement of physical and electrochemical properties of electrospun P(VdF-co-HFP) separators by incorporating magnesium borate for advanced lithium-ion batteries","authors":"Mohammed A.M.M. Al-Samet , Simge Kara , Engin Burgaz","doi":"10.1016/j.polymer.2024.127798","DOIUrl":"10.1016/j.polymer.2024.127798","url":null,"abstract":"<div><div>In this study, fibrous membrane composites containing poly (vinylidene fluoride-co-hexafluoropropylene) P(VdF-co-HFP) copolymer and various amounts of magnesium borate Mg<sub>2</sub>B<sub>2</sub>O<sub>5</sub> were prepared via electrospinning method. The crystallization behavior, thermal stability, microstructure, porosity, liquid electrolyte uptake and electrochemical performance of electrospun membranes were investigated in detail. X-ray diffraction (XRD) and differential scanning calorimetry (DSC) show that, the crystallinity of P(VdF-co-HFP) tends to decrease with increasing amount of Mg<sub>2</sub>B<sub>2</sub>O<sub>5</sub> particles. The electrospun membrane containing P(VdF-co-HFP) and 2.5 wt% of Mg<sub>2</sub>B<sub>2</sub>O<sub>5</sub> demonstrates stronger anti-shrinkage properties compared to those of commercial polypropylene (PP) or pure P(VdF-co-HFP) separators at 140 °C. The fibrous membrane consisting of 2.5 wt% Mg<sub>2</sub>B<sub>2</sub>O<sub>5</sub> exhibits high electrolyte uptake (381 %), low interfacial resistance and good porosity at room temperature (81 %), even after heating at 140 °C the porosity becomes 78 %. Moreover, Li||LiFePO<sub>4</sub> cell using P(VdF-co-HFP) separator with 2.5 wt% of Mg<sub>2</sub>B<sub>2</sub>O<sub>5</sub> shows better discharge capacities of 167.5 and 146.8 mAh g<sup>−1</sup> at 0.2 C and 5 C, respectively, compared to those of commercial PP separator which delivers only 158 and 127 mAh g<sup>−1</sup> at 0.2 C and 5 C, respectively. [P(VdF-co-HFP) + 2.5 wt% Mg<sub>2</sub>B<sub>2</sub>O<sub>5</sub>] separator also provides discharge capacity retention of 99.9 % after 100 cycles at 9 C, in comparison with only 87 % for polypropylene separator. Such results reveal that P(VdF-co-HFP) membrane containing 2.5 wt% Mg<sub>2</sub>B<sub>2</sub>O<sub>5</sub> is a highly promising separator with good safety which can be used in high-performance lithium-ion batteries.</div></div>","PeriodicalId":405,"journal":{"name":"Polymer","volume":"315 ","pages":"Article 127798"},"PeriodicalIF":4.1,"publicationDate":"2024-11-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142594260","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

PE/PP fibrous adsorbents with bifunctional groups of tertiary amine and phosphate prepared by electron beam induced co-grafting for heavy metal adsorption of both cationic and anionic forms in acidic conditions 通过电子束诱导共接枝法制备具有叔胺和磷酸双功能基团的 PE/PP 纤维吸附剂，用于在酸性条件下吸附阳离子和阴离子形式的重金属。

IF 4.1 2区化学 Q2 POLYMER SCIENCE

Polymer

Pub Date : 2024-11-06 DOI: 10.1016/j.polymer.2024.127792

Yanisa Limsuwan , Kasinee Hemvichian , Hiroyuki Hoshina , Jinhua Chen , Yoko Shimoyama , Haruyo Amada , Noriaki Seko , Thirawudh Pongprayoon

A novel fabric adsorbent having bifunctional groups of tertiary amine and phosphate was prepared by co-graft polymerization of 2-diethylaminoethyl methacrylate (NMA) and 2-hydroxyethyl methacrylate phosphate (PMA) onto a polyethylene/polypropylene nonwoven fabric (PE/PP NF) under low-energy electron beam acceleration. The process involved pre-irradiating the fabric and immersing it in the comonomer solution for grafting. The kinetics of radiation-induced graft polymerization at a total dose of 100 kGy was investigated. For pre-irradiation at 100 kGy, the optimum condition offering highest degree of grafting was at 12 wt% of NMA, 8 wt% of PMA and 4 h of reaction time. The adsorption of anions using hydrogen chromate (HCrO₄⁻) or Cr(VI) and cations using lead (Pb(II)), cadmium (Cd(II)) and copper (Cu(II)) in aqueous solution was carried out. The results demonstrated that the bifunctional adsorbent was able to adsorb both heavy metal anionic and cationic ions from water. The co-grafted adsorbents with tertiary amine and phosphate were able to adsorb 85 % Cr(VI) anion and 29 % Pb(II) cations from mixed Cr(VI) and Pb(II) solution at pH 3.0 and 71 % Pb(II), 13 % Cd(II) and 31 % Cu(II) from mixed Pb(II), Cd(II) and Cu(II) solution at pH 5.0. The unique achievement of this study is its hypothesis that a bifunctional adsorbent can be prepared from radiation-induced graft polymerization of two different monomers onto NF, along with proof that the prepared bifunctional adsorbent can actually absorb both cationic or anionic heavy metals forms. Additionally, the adsorbent's preparation offers a rapid and straightforward one-step grafting technique. Therefore, the new bifunctional adsorbents can remove heavy metal ions in aqueous solution, either in the cation or anion form, thus offering highly promising applications in industrial wastewater treatment.

在低能电子束加速条件下，通过在聚乙烯/聚丙烯无纺布（PE/PP NF）上接枝聚合甲基丙烯酸 2-二乙氨基乙酯（NMA）和甲基丙烯酸 2-羟乙基酯磷酸酯（PMA），制备了一种具有叔胺和磷酸酯双官能团的新型织物吸附剂。该工艺包括对织物进行预辐照，然后将其浸入共聚单体溶液中进行接枝。研究了总剂量为 100 kGy 的辐射诱导接枝聚合的动力学。在 100 kGy 的预辐照条件下，NMA 含量为 12 wt%、PMA 含量为 8 wt%、反应时间为 4 h 时接枝程度最高。对水溶液中的阴离子铬酸氢（HCrO4-）或六价铬（Cr(VI)）以及阳离子铅（Pb(II)）、镉（Cd(II)）和铜（Cu(II)）进行了吸附。结果表明，双功能吸附剂能够吸附水中的重金属阴离子和阳离子。在 pH 值为 3.0 时，与叔胺和磷酸盐接枝的吸附剂能够吸附混合 Cr(VI) 和 Pb(II) 溶液中 85% 的 Cr(VI) 阴离子和 29% 的 Pb(II) 阳离子；在 pH 值为 5.0 时，能够吸附混合 Pb(II)、Cd(II) 和 Cu(II) 溶液中 71% 的 Pb(II)、13% 的 Cd(II) 和 31% 的 Cu(II)。这项研究的独特之处在于，它提出了通过辐射诱导将两种不同的单体接枝聚合到 NF 上可以制备双功能吸附剂的假设，并证明所制备的双功能吸附剂实际上可以吸收阳离子或阴离子形式的重金属。此外，该吸附剂的制备采用了快速、简单的一步接枝技术。因此，这种新型双功能吸附剂可以去除水溶液中的阳离子或阴离子形式的重金属离子，从而在工业废水处理方面具有广阔的应用前景。

{"title":"PE/PP fibrous adsorbents with bifunctional groups of tertiary amine and phosphate prepared by electron beam induced co-grafting for heavy metal adsorption of both cationic and anionic forms in acidic conditions","authors":"Yanisa Limsuwan , Kasinee Hemvichian , Hiroyuki Hoshina , Jinhua Chen , Yoko Shimoyama , Haruyo Amada , Noriaki Seko , Thirawudh Pongprayoon","doi":"10.1016/j.polymer.2024.127792","DOIUrl":"10.1016/j.polymer.2024.127792","url":null,"abstract":"<div><div>A novel fabric adsorbent having bifunctional groups of tertiary amine and phosphate was prepared by co-graft polymerization of 2-diethylaminoethyl methacrylate (NMA) and 2-hydroxyethyl methacrylate phosphate (PMA) onto a polyethylene/polypropylene nonwoven fabric (PE/PP NF) under low-energy electron beam acceleration. The process involved pre-irradiating the fabric and immersing it in the comonomer solution for grafting. The kinetics of radiation-induced graft polymerization at a total dose of 100 kGy was investigated. For pre-irradiation at 100 kGy, the optimum condition offering highest degree of grafting was at 12 wt% of NMA, 8 wt% of PMA and 4 h of reaction time. The adsorption of anions using hydrogen chromate (HCrO<sub>4</sub><sup>−</sup>) or Cr(VI) and cations using lead (Pb(II)), cadmium (Cd(II)) and copper (Cu(II)) in aqueous solution was carried out. The results demonstrated that the bifunctional adsorbent was able to adsorb both heavy metal anionic and cationic ions from water. The co-grafted adsorbents with tertiary amine and phosphate were able to adsorb 85 % Cr(VI) anion and 29 % Pb(II) cations from mixed Cr(VI) and Pb(II) solution at pH 3.0 and 71 % Pb(II), 13 % Cd(II) and 31 % Cu(II) from mixed Pb(II), Cd(II) and Cu(II) solution at pH 5.0. The unique achievement of this study is its hypothesis that a bifunctional adsorbent can be prepared from radiation-induced graft polymerization of two different monomers onto NF, along with proof that the prepared bifunctional adsorbent can actually absorb both cationic or anionic heavy metals forms. Additionally, the adsorbent's preparation offers a rapid and straightforward one-step grafting technique. Therefore, the new bifunctional adsorbents can remove heavy metal ions in aqueous solution, either in the cation or anion form, thus offering highly promising applications in industrial wastewater treatment.</div></div>","PeriodicalId":405,"journal":{"name":"Polymer","volume":"315 ","pages":"Article 127792"},"PeriodicalIF":4.1,"publicationDate":"2024-11-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142594305","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Enabling phenolic resin toughening and heat resistant: Tactics and recent advances 促进酚醛树脂增韧和耐热：策略和最新进展

IF 4.1 2区化学 Q2 POLYMER SCIENCE

Polymer

Pub Date : 2024-11-06 DOI: 10.1016/j.polymer.2024.127782

Shilong Chang , Xiaoge Wang , Guangyu Zhang , Fu-Gang Zhao , Kemei Pei , Xiaogang Yang

As one of the most important synthetic resins, phenolic resins are widely used in various scenarios of modern industry and contribute a huge economic value. To satisfy high-end and demanding application requirements, phenolic resin modification always stays the research focus in this field. This review involved two main characteristics of phenolic resins, toughness and heat resistance. Toughening modification primarily included internal toughening and external toughening tactics, while heat resistance enhancement strategies included various inorganic compounds modification, organic molecules modification, nanoparticle doping modification and ceramification modification.

作为最重要的合成树脂之一，酚醛树脂被广泛应用于现代工业的各个领域，并创造了巨大的经济价值。为了满足高端、苛刻的应用要求，酚醛树脂改性一直是该领域的研究重点。本综述涉及酚醛树脂的两大特性：韧性和耐热性。韧性改性主要包括内增韧和外增韧两种策略，而耐热性增强策略则包括各种无机化合物改性、有机分子改性、纳米粒子掺杂改性和陶瓷化改性。

引用次数: 0

Mitigating aging infrastructure risks: An optimized epoxy resin system for water supply pipeline rehabilitation 降低基础设施老化风险：用于供水管道修复的优化环氧树脂系统

IF 4.1 2区化学 Q2 POLYMER SCIENCE

Polymer

Pub Date : 2024-11-06 DOI: 10.1016/j.polymer.2024.127791

Yahong Zhao , Peng Ma , Jingjie Bi , Baosong Ma , Hao Zhou , Kaixin Liu , James Geisbush , Haoliang Wu

Urban water supply networks are crucial for ensuring the delivery of safe drinking water to urban populations; however, the aging infrastructure in these systems has led to a rising incidence of leaks and frequent pipeline failures, posing serious risks. Traditional repair approaches encounter limitations in terms of efficiency, durability, and environmental safety, particularly when employed in potable water pipelines. To address these challenges, we developed a novel multi-component amine-cured epoxy resin system specifically optimized for in-situ curing under ambient conditions. This study comprehensively examines the mechanical properties, water absorption behavior, and curing kinetics of this resin system, formulated to reduce volatile organic compound emissions while enhancing durability under prolonged water exposure. Experimental findings demonstrate that the E2 formulation exhibited superior tensile strength, flexural properties, and fracture toughness relative to other formulations, with a two-stage water absorption model accurately predicting resin behavior in moisture-laden environments. Moreover, finite element modeling and laboratory testing confirmed the influence of bubble defects on mechanical performance, and a negative pressure defoaming technique effectively reduced defect volume, resulting in a 17.6 % improvement in tensile strength. Collectively, this research advances the practical application of rapid-curing resins, offering a resilient, safe, and sustainable solution for the rehabilitation of aging water pipeline networks.

城市供水管网对确保向城市人口提供安全的饮用水至关重要；然而，这些系统基础设施的老化导致漏水率上升，管道故障频发，带来了严重的风险。传统的维修方法在效率、耐用性和环境安全性方面存在局限性，尤其是在饮用水管道中使用时。为了应对这些挑战，我们开发了一种新型多组分胺固化环氧树脂系统，该系统专门针对环境条件下的原位固化进行了优化。本研究全面考察了这种树脂体系的机械性能、吸水性能和固化动力学，其配方旨在减少挥发性有机化合物的排放，同时提高长期暴露在水中的耐久性。实验结果表明，E2 配方的拉伸强度、弯曲性能和断裂韧性均优于其他配方，两阶段吸水模型可准确预测树脂在含水环境中的行为。此外，有限元建模和实验室测试证实了气泡缺陷对机械性能的影响，负压消泡技术有效减少了缺陷体积，使拉伸强度提高了 17.6%。总之，这项研究推动了快速固化树脂的实际应用，为老化输水管网的修复提供了一种弹性、安全和可持续的解决方案。

{"title":"Mitigating aging infrastructure risks: An optimized epoxy resin system for water supply pipeline rehabilitation","authors":"Yahong Zhao , Peng Ma , Jingjie Bi , Baosong Ma , Hao Zhou , Kaixin Liu , James Geisbush , Haoliang Wu","doi":"10.1016/j.polymer.2024.127791","DOIUrl":"10.1016/j.polymer.2024.127791","url":null,"abstract":"<div><div>Urban water supply networks are crucial for ensuring the delivery of safe drinking water to urban populations; however, the aging infrastructure in these systems has led to a rising incidence of leaks and frequent pipeline failures, posing serious risks. Traditional repair approaches encounter limitations in terms of efficiency, durability, and environmental safety, particularly when employed in potable water pipelines. To address these challenges, we developed a novel multi-component amine-cured epoxy resin system specifically optimized for in-situ curing under ambient conditions. This study comprehensively examines the mechanical properties, water absorption behavior, and curing kinetics of this resin system, formulated to reduce volatile organic compound emissions while enhancing durability under prolonged water exposure. Experimental findings demonstrate that the E2 formulation exhibited superior tensile strength, flexural properties, and fracture toughness relative to other formulations, with a two-stage water absorption model accurately predicting resin behavior in moisture-laden environments. Moreover, finite element modeling and laboratory testing confirmed the influence of bubble defects on mechanical performance, and a negative pressure defoaming technique effectively reduced defect volume, resulting in a 17.6 % improvement in tensile strength. Collectively, this research advances the practical application of rapid-curing resins, offering a resilient, safe, and sustainable solution for the rehabilitation of aging water pipeline networks.</div></div>","PeriodicalId":405,"journal":{"name":"Polymer","volume":"315 ","pages":"Article 127791"},"PeriodicalIF":4.1,"publicationDate":"2024-11-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142594259","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Copolymeric hydrogels with high capacities of hydration and methylene blue adsorption in water 在水中具有高水合能力和亚甲基蓝吸附能力的共聚水凝胶

IF 4.1 2区化学 Q2 POLYMER SCIENCE

Polymer

Pub Date : 2024-11-06 DOI: 10.1016/j.polymer.2024.127761

Estefanía Oyarce , Héctor Diaz , Andrés Boulett , Karina Roa , Julio Sánchez , Oscar G. Marambio , Guadalupe del C. Pizarro

Copolymers based on monomethyl hydrogen itaconate (βHI) with 2-hydroxyethyl methacrylate (HEMA) and βHI with 2-hydroxypropyl methacrylate (HPMA) were prepared in different monomer molar ratios. The reactivity parameters of copolymerization (r₁ and r₂) were determined. The values obtained for r₁ and r₂ indicate that P(βHI-co-HEMA) exhibits a high tendency towards alternate copolymerization. Structural characterization of the copolymeric hydrogels was carried out using Fourier transform infrared (FTIR) and ¹H NMR spectroscopies, where the characteristic signals of the constituent functional groups were observed. The typical thermal stability of the polymeric systems was observed by thermogravimetric analysis (TGA). In addition, the swelling capacity in water was evaluated, and a swelling percentage over 655 % and 1249 % presented P(βHI-co-HEMA) and P(βHI-co-HPMA) respectively, in a period of 15 days at pH 10, and presence of 0.05 M NaNO₃.

Additionally, methylene blue (MB) adsorption capacity was studied in batch mode by varying different experimental parameters. MB adsorption capacity of 122.79 mg g⁻¹ and 112.24 mg g⁻¹ were achieved for P(βHI-co-HEMA) and P(βHI-co-HPMA), respectively. The data obtained were fitted to the Elovich kinetic model and to a Redlich-Peterson isotherm. The thermodynamic parameters indicated that the adsorption phenomenon is spontaneous, endothermic and with a high probability of occurrence. The adsorption efficiency decreases by approximately 60 % in the presence of interfering ions (Na⁺, K⁺, Ca²⁺ and Cl⁻). The adsorbents are reusable and achieve high MB adsorption efficiency (90 % and 80 % for P(βHI-co-HEMA) and P(βHI-co-HPMA) respectively) in a textile-simulated wastewater. Based on the results obtained, it is concluded that P(βHI-co-HEMA) and P(βHI-co-HPMA) show great potential for use in adsorption of water molecules, for MB retention and purification of simulated effluents from the textile industry.

以甲基丙烯酸羟乙酯（HEMA）和甲基丙烯酸羟丙酯（HPMA）为基料，按不同的单体摩尔比制备了伊塔康酸单甲酯（βHI）共聚物。测定了共聚反应活性参数（r1 和 r2）。r1 和 r2 的值表明 P(βHI-co-HEMA)具有很高的交替共聚倾向。利用傅立叶变换红外光谱（FTIR）和 1H-NMR 光谱对共聚水凝胶进行了结构表征，观察到了组成官能团的特征信号。通过热重分析（TGA）观察了聚合物体系的典型热稳定性。此外，还评估了在水中的溶胀能力，在 pH 值为 10、0.05 M NaNO3 存在的条件下，P(βHI-co-HEMA) 和 P(βHI-co-HMA) 在 15 天内的溶胀率分别超过 655 % 和 1249 %。P(βHI-co-HEMA) 和 P(βHI-co-HPMA) 的甲基溴吸附量分别为 122.79 mg g-1 和 112.24 mg g-1。所得数据与埃洛维奇动力学模型和 Redlich-Peterson 等温线进行了拟合。热力学参数表明，吸附现象是自发的、内热的，而且发生的概率很高。在存在干扰离子（Na+、K+、Ca2+ 和 Cl-）的情况下，吸附效率会降低约 60%。这些吸附剂可重复使用，在纺织模拟废水中的甲基溴吸附效率很高（P(βHI-co-HEMA) 和 P(βHI-co-HPMA) 分别为 90% 和 80%）。根据所获得的结果，可以得出结论：P(βHI-co-HEMA) 和 P(βHI-co-HHPMA) 在吸附水分子、保留甲基溴和净化纺织工业模拟废水方面具有巨大的应用潜力。

{"title":"Copolymeric hydrogels with high capacities of hydration and methylene blue adsorption in water","authors":"Estefanía Oyarce , Héctor Diaz , Andrés Boulett , Karina Roa , Julio Sánchez , Oscar G. Marambio , Guadalupe del C. Pizarro","doi":"10.1016/j.polymer.2024.127761","DOIUrl":"10.1016/j.polymer.2024.127761","url":null,"abstract":"<div><div>Copolymers based on monomethyl hydrogen itaconate (βHI) with 2-hydroxyethyl methacrylate (HEMA) and βHI with 2-hydroxypropyl methacrylate (HPMA) were prepared in different monomer molar ratios. The reactivity parameters of copolymerization (r<sub>1</sub> and r<sub>2</sub>) were determined. The values obtained for r<sub>1</sub> and r<sub>2</sub> indicate that P(βHI-co-HEMA) exhibits a high tendency towards alternate copolymerization. Structural characterization of the copolymeric hydrogels was carried out using Fourier transform infrared (FTIR) and <sup>1</sup>H NMR spectroscopies, where the characteristic signals of the constituent functional groups were observed. The typical thermal stability of the polymeric systems was observed by thermogravimetric analysis (TGA). In addition, the swelling capacity in water was evaluated, and a swelling percentage over 655 % and 1249 % presented P(βHI-co-HEMA) and P(βHI-co-HPMA) respectively, in a period of 15 days at pH 10, and presence of 0.05 M NaNO<sub>3</sub>.</div><div>Additionally, methylene blue (MB) adsorption capacity was studied in batch mode by varying different experimental parameters. MB adsorption capacity of 122.79 mg g<sup>−1</sup> and 112.24 mg g<sup>−1</sup> were achieved for P(βHI-co-HEMA) and P(βHI-co-HPMA), respectively. The data obtained were fitted to the Elovich kinetic model and to a Redlich-Peterson isotherm. The thermodynamic parameters indicated that the adsorption phenomenon is spontaneous, endothermic and with a high probability of occurrence. The adsorption efficiency decreases by approximately 60 % in the presence of interfering ions (Na<sup>+</sup>, K<sup>+</sup>, Ca<sup>2+</sup> and Cl<sup>−</sup>). The adsorbents are reusable and achieve high MB adsorption efficiency (90 % and 80 % for P(βHI-co-HEMA) and P(βHI-co-HPMA) respectively) in a textile-simulated wastewater. Based on the results obtained, it is concluded that P(βHI-co-HEMA) and P(βHI-co-HPMA) show great potential for use in adsorption of water molecules, for MB retention and purification of simulated effluents from the textile industry.</div></div>","PeriodicalId":405,"journal":{"name":"Polymer","volume":"315 ","pages":"Article 127761"},"PeriodicalIF":4.1,"publicationDate":"2024-11-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142594499","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Preparation and properties of high temperature colorless transparent polyimide containing semi-alicyclic and bisbenzoxazole structure 含有半脂环和双苯并恶唑结构的高温无色透明聚酰亚胺的制备及其性能

IF 4.1 2区化学 Q2 POLYMER SCIENCE

Polymer

Pub Date : 2024-11-06 DOI: 10.1016/j.polymer.2024.127787

Feng Luo , Jichun Zhao , Long Jiao , Zhijun Du , Zhixin Dong , Yanna Zhang , Zhaoyan Sun , Xuepeng Qiu

In recent years, with the development of the flexible display field, there has been an increasing demand for colorless polyimide (CPI) that can be used for transparent displays. In this work, two cis- and trans-isomers of diamines 2,2'-((1r, 4r)-cyclohexane-1,4-diyl)bis (benzoxazol-5-amine) (trans-CHDB) and 2,2'-((1s, 4s)-cyclohexane-1,4-diyl)bis (benzoxazol-5-amine) (cis-CHDB) containing benzoxazole and cyclohexane structures were synthesized, and two series of polyimides CPI were prepared with three commercial dianhydrides: 4,4'-(hexafluoroisopropylidene)diphthalic anhydride (6FDA), 1,2,4,5-cyclohexanetetracarboxylic dianhydride (HPMDA) and cyclobutane-1,2,3,4-tetracarboxylic dianhydride (CBDA). Presence of bisbenzoxazole structure enhanced rigidity and linearity of CPI molecular chain. CPI trans-CHDB/CBDA exhibited excellent comprehensive performance with a high T_g of 404 °C, coefficient of thermal expansion of 27.4 ppm K⁻¹ Outstanding tensile modulus of 4.0 GPa. By introducing cyclohexane structure to suppress charge transfer interaction, optical transparency of CPI was increased. The transmittance of trans-CHDB/CBDA at 450 nm reached to 83.7 %, which was supposed to a promising application prospect for flexible display substrates.

近年来，随着柔性显示器领域的发展，人们对可用于透明显示器的无色聚酰亚胺（CPI）的需求越来越大。在这项研究中，2,2'-((1r,4r)-环己烷-1,4-二基)双(苯并恶唑-5-胺) (trans-CHDB) 和 2,2'-((1s,4s)-环己烷-1、合成了含有苯并恶唑和环己烷结构的 2,2'-((1s,4s)-环己烷-1,4-二基)双(苯并恶唑-5-胺)(顺式-CHDB)，并用三种商用二酐制备了两个系列的聚酰亚胺 CPI：4,4'-(hexafluoroisopropylidene)diphthalic anhydride (6FDA)、1,2,4,5-cyclohexanetetracarboxylic dianhydride (HPMDA) 和 cyclobutane-1,2,3,4-tetracarboxylic dianhydride (CBDA)。双苯并恶唑结构的存在增强了 CPI 分子链的刚性和线性。CPI 反式-CHDB/CBDA 具有优异的综合性能，其 Tg 高达 404 ℃，热膨胀系数为 27.4 ppm-K-1，拉伸模量高达 4.0 GPa。通过引入环己烷结构来抑制电荷转移作用，CPI 的光学透明度得到了提高。在 450 纳米波长下，反式-CHDB/CBDA 的透射率达到 83.7%，在柔性显示基板方面具有广阔的应用前景。

{"title":"Preparation and properties of high temperature colorless transparent polyimide containing semi-alicyclic and bisbenzoxazole structure","authors":"Feng Luo , Jichun Zhao , Long Jiao , Zhijun Du , Zhixin Dong , Yanna Zhang , Zhaoyan Sun , Xuepeng Qiu","doi":"10.1016/j.polymer.2024.127787","DOIUrl":"10.1016/j.polymer.2024.127787","url":null,"abstract":"<div><div>In recent years, with the development of the flexible display field, there has been an increasing demand for colorless polyimide (CPI) that can be used for transparent displays. In this work, two <em>cis-</em> and <em>trans-</em>isomers of diamines 2,2'-((1r, 4r)-cyclohexane-1,4-diyl)bis (benzoxazol-5-amine) (<em>trans</em>-CHDB) and 2,2'-((1s, 4s)-cyclohexane-1,4-diyl)bis (benzoxazol-5-amine) (<em>cis</em>-CHDB) containing benzoxazole and cyclohexane structures were synthesized, and two series of polyimides CPI were prepared with three commercial dianhydrides: 4,4'-(hexafluoroisopropylidene)diphthalic anhydride (6FDA), 1,2,4,5-cyclohexanetetracarboxylic dianhydride (HPMDA) and cyclobutane-1,2,3,4-tetracarboxylic dianhydride (CBDA). Presence of bisbenzoxazole structure enhanced rigidity and linearity of CPI molecular chain. CPI <em>trans</em>-CHDB/CBDA exhibited excellent comprehensive performance with a high <em>T</em><sub>g</sub> of 404 °C, coefficient of thermal expansion of 27.4 ppm K<sup>−1</sup> Outstanding tensile modulus of 4.0 GPa. By introducing cyclohexane structure to suppress charge transfer interaction, optical transparency of CPI was increased. The transmittance of <em>trans</em>-CHDB/CBDA at 450 nm reached to 83.7 %, which was supposed to a promising application prospect for flexible display substrates.</div></div>","PeriodicalId":405,"journal":{"name":"Polymer","volume":"315 ","pages":"Article 127787"},"PeriodicalIF":4.1,"publicationDate":"2024-11-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142588493","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Co-vulcanization of natural rubber and Eucommia ulmoides gum for mediation of the nonlinear rheology behaviors 天然橡胶与杜仲胶的共硫化用于调解非线性流变行为

IF 4.1 2区化学 Q2 POLYMER SCIENCE

Polymer

Pub Date : 2024-11-06 DOI: 10.1016/j.polymer.2024.127797

Zhaopeng Hu , Xin Jiang , Benteng Liu , Qiao Li , Hongda Meng , Yihu Song , Yongzhong Bao , Qiang Zheng

Co-vulcanization of natural rubber (NR) and high-moduli Eucommia ulmoides gum (EUG) is promising while the reduction in crystallinity of crosslinked EUG is adverse for developing high-performance materials. Proposed herein is a novel method to prepare high-strength and high-stretchability NR/EUG vulcanizates with rapid vulcanization of EUG into slightly crosslinked particles, followed by further vulcanization of NR to form crosslinked matrix network. Deep eutectic solvents (DESs) are employed to facilitate the vulcanization of EUG during its blending with NR. The two-step vulcanization results in vulcanizates exhibiting superior mechanical properties under shear, tensile, and compressive conditions, significantly exceeding those of vulcanizates prepared by traditional processing methods. The reinforcement mechanism is elucidated by controlling thermomechanical coupling conditions and is supported by comprehensive structural characterizations. It is suggested that the EUG crystalline regions, maintained through the special processing method, work in conjunction with the stress-induced crystallization of the matrix to enhance the vulcanizates, nearly doubling the deformation stress at 800 % strain. The crystalline regions can mediate the deformation stress during shear and compression and weaken nonlinear rheological behavior. The established structure-performance relationship is guidable for preparing high-performance NR/EUG blend vulcanizates.

天然橡胶（NR）和高模量杜仲胶（EUG）的共硫化前景广阔，但交联杜仲胶结晶度的降低不利于高性能材料的开发。本文提出了一种制备高强度和高拉伸性 NR/EUG 硫化胶的新方法，先将 EUG 快速硫化成轻微交联的颗粒，然后进一步硫化 NR 以形成交联基体网络。在将 EUG 与 NR 混合的过程中，采用深共晶溶剂 (DES) 来促进 EUG 的硫化。通过两步硫化，硫化胶在剪切、拉伸和压缩条件下均表现出优异的机械性能，大大超过了传统加工方法制备的硫化胶。通过控制热机械耦合条件阐明了加固机理，并得到了全面结构特性的支持。研究表明，通过特殊加工方法保持的 EUG 结晶区与基体的应力诱导结晶共同作用，增强了硫化胶，在 800% 应变时将变形应力提高了近一倍。结晶区域可在剪切和压缩过程中调解变形应力，并削弱非线性流变行为。所建立的结构-性能关系对制备高性能 NR/EUG 混合硫化胶具有指导意义。

{"title":"Co-vulcanization of natural rubber and Eucommia ulmoides gum for mediation of the nonlinear rheology behaviors","authors":"Zhaopeng Hu , Xin Jiang , Benteng Liu , Qiao Li , Hongda Meng , Yihu Song , Yongzhong Bao , Qiang Zheng","doi":"10.1016/j.polymer.2024.127797","DOIUrl":"10.1016/j.polymer.2024.127797","url":null,"abstract":"<div><div>Co-vulcanization of natural rubber (NR) and high-moduli Eucommia ulmoides gum (EUG) is promising while the reduction in crystallinity of crosslinked EUG is adverse for developing high-performance materials. Proposed herein is a novel method to prepare high-strength and high-stretchability NR/EUG vulcanizates with rapid vulcanization of EUG into slightly crosslinked particles, followed by further vulcanization of NR to form crosslinked matrix network. Deep eutectic solvents (DESs) are employed to facilitate the vulcanization of EUG during its blending with NR. The two-step vulcanization results in vulcanizates exhibiting superior mechanical properties under shear, tensile, and compressive conditions, significantly exceeding those of vulcanizates prepared by traditional processing methods. The reinforcement mechanism is elucidated by controlling thermomechanical coupling conditions and is supported by comprehensive structural characterizations. It is suggested that the EUG crystalline regions, maintained through the special processing method, work in conjunction with the stress-induced crystallization of the matrix to enhance the vulcanizates, nearly doubling the deformation stress at 800 % strain. The crystalline regions can mediate the deformation stress during shear and compression and weaken nonlinear rheological behavior. The established structure-performance relationship is guidable for preparing high-performance NR/EUG blend vulcanizates.</div></div>","PeriodicalId":405,"journal":{"name":"Polymer","volume":"315 ","pages":"Article 127797"},"PeriodicalIF":4.1,"publicationDate":"2024-11-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142594257","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Recent advances in ring-opening (co)Polymerization of O-carboxyanhydrides O 型羧基酸酐开环（共）聚合的最新进展

IF 4.1 2区化学 Q2 POLYMER SCIENCE

Polymer

Pub Date : 2024-11-05 DOI: 10.1016/j.polymer.2024.127783

Li Lu , Jie Lin , Tingting Peng , Zhaowei Jia , Jincai Wu

Poly (α-hydroxy acids) (PAHAs) have garnered significant attention due to their pivotal role in various fields, including packaging, agriculture, and biomedical engineering, as biodegradable polyesters. Therefore, significant efforts have been dedicated to the development of methodologies that enable the facile preparation of PAHAs with controlled molecular weights and diverse pendant groups for versatile applications. However, the production of PAHAs through the ring-opening polymerization (ROP) of OCAs is highly challenging due to the strong side reaction of monomer racemization and the faster polymerization kinetics. To synthesize PAHAs with specific pendant groups and structure, researchers have developed a variety of ROP systems, each with its own unique advantages in recent years. Here, we have provided a summary of the fundamental characteristics and recent advancements of various methods, such as controlled/living ROP systems, topology-controlled ROP systems, stereoselective ROP systems of OCAs, and other copolymerization routes. Moreover, this article discusses the benefits and unresolved issues associated with different synthetic methods, providing readers with the necessary information to select rapid and manageable ROP systems for PAHAs synthesis.

聚（α-羟基）酸（PAHAs）作为可生物降解的聚酯，在包装、农业和生物医学工程等多个领域发挥着举足轻重的作用，因而备受关注。因此，人们一直致力于开发能够轻松制备具有可控分子量和不同悬垂基团的 PAHAs 的方法，以实现多种应用。然而，通过 OCA 开环聚合 (ROP) 法生产 PAHAs 极具挑战性，因为单体消旋化副反应强烈，聚合动力学速度较快。为了合成具有特定悬垂基团和结构的 PAHA，近年来研究人员开发了多种 ROP 系统，每种系统都有其独特的优势。在此，我们总结了各种方法的基本特点和最新进展，如可控/活体 ROP 系统、拓扑可控 ROP 系统、OCA 的立体选择性 ROP 系统以及其他共聚途径。此外，本文还讨论了与不同合成方法相关的优点和尚未解决的问题，为读者选择快速、可控的 ROP 系统进行 PAHAs 合成提供了必要的信息。

{"title":"Recent advances in ring-opening (co)Polymerization of O-carboxyanhydrides","authors":"Li Lu , Jie Lin , Tingting Peng , Zhaowei Jia , Jincai Wu","doi":"10.1016/j.polymer.2024.127783","DOIUrl":"10.1016/j.polymer.2024.127783","url":null,"abstract":"<div><div>Poly (α-hydroxy acids) (PAHAs) have garnered significant attention due to their pivotal role in various fields, including packaging, agriculture, and biomedical engineering, as biodegradable polyesters. Therefore, significant efforts have been dedicated to the development of methodologies that enable the facile preparation of PAHAs with controlled molecular weights and diverse pendant groups for versatile applications. However, the production of PAHAs through the ring-opening polymerization (ROP) of OCAs is highly challenging due to the strong side reaction of monomer racemization and the faster polymerization kinetics. To synthesize PAHAs with specific pendant groups and structure, researchers have developed a variety of ROP systems, each with its own unique advantages in recent years. Here, we have provided a summary of the fundamental characteristics and recent advancements of various methods, such as controlled/living ROP systems, topology-controlled ROP systems, stereoselective ROP systems of OCAs, and other copolymerization routes. Moreover, this article discusses the benefits and unresolved issues associated with different synthetic methods, providing readers with the necessary information to select rapid and manageable ROP systems for PAHAs synthesis.</div></div>","PeriodicalId":405,"journal":{"name":"Polymer","volume":"314 ","pages":"Article 127783"},"PeriodicalIF":4.1,"publicationDate":"2024-11-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142580347","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Synergy between biphenyl mesomorphic structure and organic crystal phenazine for improving the intrinsic thermal conductivity of epoxy 联苯介形结构与有机晶体酚嗪在改善环氧树脂内在导热性方面的协同作用

IF 4.1 2区化学 Q2 POLYMER SCIENCE

Polymer

Pub Date : 2024-11-05 DOI: 10.1016/j.polymer.2024.127785

Zhe Wang , Haodong Hu , Ruizheng Gao , Jingbo Zhou , Hongyu Zhu , Fei Xu , Jianwen Peng , Luchao Pei , Huaiyuan Wang , Di Bao , Yanji Zhu

The inherent low intrinsic thermal conductivity of epoxy resin severely restricts its potential application, making it difficult to meet the growing demand of energy, electrical and electronic technologies. The liquid crystal epoxy resin, which is wildly employed to improve the intrinsic thermal conductivity of epoxy resin, is constrained by its complex molecular structure design and synthesis procedures. In this work, the rigid group of 4,4′-dihydroxybiphenyl was introduced into the main chain of epoxy resin by ring-opening polymerization (ROP) to change the molecular structure of epoxy resin. The introduction of biphenyl groups enhances the orderliness of molecular structure and forms hydrogen bonds between molecules, which further enhances the transport of intramolecular phonons. The thermal conductivity of the graft modified epoxy resin (GMR) after DDM curing is 0.30 W m⁻¹ K⁻¹. After adding of organic crystal phenazine (PNE) to the GMR matrix, the inherent strong crystallization behaviors of PNE can accelerate the regularity arrangement of rigid groups in GMR, and promote the nucleation and crystallization process of GMR/PNE. The thermal conductivity of GMR/PNE after DDM curing can reach 0.33 W m⁻¹ K⁻¹. It is 165 % of the thermal conductivity of traditional epoxy resin, which is 0.2 W m⁻¹ K⁻¹. This study will provide a new method to improve the intrinsic thermal conductivity of polymer materials.

环氧树脂固有的低本征导热率严重限制了其潜在应用，使其难以满足能源、电气和电子技术日益增长的需求。液晶环氧树脂被广泛用于提高环氧树脂的本征导热率，但受制于其复杂的分子结构设计和合成过程。本研究通过开环聚合（ROP）将 4,4'-二羟基联苯的刚性基团引入环氧树脂主链，改变环氧树脂的分子结构。联苯基团的引入提高了分子结构的有序性，并在分子间形成氢键，从而进一步增强了分子内声子的传输。接枝改性环氧树脂（GMR）在 DDM 固化后的导热系数为 0.30 W-m-1-K-1。在 GMR 基体中加入有机结晶酚嗪（PNE）后，PNE 固有的强结晶行为可加速 GMR 中刚性基团的规整排列，促进 GMR/PNE 的成核和结晶过程。DDM 固化后，GMR/PNE 的导热系数可达 0.33 W-m-1-K-1。这是传统环氧树脂导热系数（0.2 W-m-1-K-1）的 165%。这项研究将为提高聚合物材料的固有热导率提供一种新方法。

{"title":"Synergy between biphenyl mesomorphic structure and organic crystal phenazine for improving the intrinsic thermal conductivity of epoxy","authors":"Zhe Wang , Haodong Hu , Ruizheng Gao , Jingbo Zhou , Hongyu Zhu , Fei Xu , Jianwen Peng , Luchao Pei , Huaiyuan Wang , Di Bao , Yanji Zhu","doi":"10.1016/j.polymer.2024.127785","DOIUrl":"10.1016/j.polymer.2024.127785","url":null,"abstract":"<div><div>The inherent low intrinsic thermal conductivity of epoxy resin severely restricts its potential application, making it difficult to meet the growing demand of energy, electrical and electronic technologies. The liquid crystal epoxy resin, which is wildly employed to improve the intrinsic thermal conductivity of epoxy resin, is constrained by its complex molecular structure design and synthesis procedures. In this work, the rigid group of 4,4′-dihydroxybiphenyl was introduced into the main chain of epoxy resin by ring-opening polymerization (ROP) to change the molecular structure of epoxy resin. The introduction of biphenyl groups enhances the orderliness of molecular structure and forms hydrogen bonds between molecules, which further enhances the transport of intramolecular phonons. The thermal conductivity of the graft modified epoxy resin (GMR) after DDM curing is 0.30 W m<sup>−1</sup> K<sup>−1</sup>. After adding of organic crystal phenazine (PNE) to the GMR matrix, the inherent strong crystallization behaviors of PNE can accelerate the regularity arrangement of rigid groups in GMR, and promote the nucleation and crystallization process of GMR/PNE. The thermal conductivity of GMR/PNE after DDM curing can reach 0.33 W m<sup>−1</sup> K<sup>−1</sup>. It is 165 % of the thermal conductivity of traditional epoxy resin, which is 0.2 W m<sup>−1</sup> K<sup>−1</sup>. This study will provide a new method to improve the intrinsic thermal conductivity of polymer materials.</div></div>","PeriodicalId":405,"journal":{"name":"Polymer","volume":"314 ","pages":"Article 127785"},"PeriodicalIF":4.1,"publicationDate":"2024-11-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142579905","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Preparation and properties of vinyltriethoxysilane-modified waterborne acrylate resins 乙烯基三乙氧基硅烷改性水性丙烯酸酯树脂的制备与性能

IF 4.1 2区化学 Q2 POLYMER SCIENCE

Polymer

Pub Date : 2024-11-04 DOI: 10.1016/j.polymer.2024.127781

Jinmei Ma , Shiyan Zhou , Yaqi Wang , Rong Chen , Shuai Wang , Fenghua Zhang , Yu-Peng He

Silicone-modified waterborne polyacrylate resins were created using semi-continuous emulsion polymerization. Vinyltriethoxysilane (A151) was used as a modified monomer. Two-component waterborne coatings were then prepared by adding poly (hexamethylene diisocyanate) (PHDI) as a curing agent to the A151-modified polyacrylate resins for the first time. The reaction mechanism of the acrylate copolymer and the curing mechanism of the coating were demonstrated using Fourier transform infrared spectroscopy (FTIR). The modification significantly improved the hydrophobicity and thermal stability of the coating, as confirmed by increased contact angle measurement and thermogravimetric (TG) analysis. Water absorption was reduced from 35 % to 10 % while maintaining optimal adhesion levels. Additionally, the low glass transition temperature of the acrylate resin emulsion film was investigated by differential scanning calorimetry (DSC), indicating excellent coating film properties for the two-component waterborne resin. The modification with PHDI not only significantly increased the water resistance time of the polymer coating but also improved the coating hardness while maintaining excellent adhesion of the silicon-containing resin to the substrate. This study introduces a new method for synthesizing low-cost, high-performance waterborne acrylate resins.

采用半连续乳液聚合法制造了硅改性水性聚丙烯酸酯树脂。改性单体为乙烯基三乙氧基硅烷（A151）。然后，首次在 A151 改性聚丙烯酸酯树脂中加入聚（六亚甲基二异氰酸酯）（PHDI）作为固化剂，制备出了双组分水性涂料。傅立叶变换红外光谱（FTIR）证明了丙烯酸酯共聚物的反应机理和涂层的固化机理。接触角测量和热重（TG）分析证实，改性大大提高了涂层的疏水性和热稳定性。在保持最佳附着力的同时，吸水率从 35% 降至 10%。此外，通过差示扫描量热法（DSC）对丙烯酸酯树脂乳液膜的低玻璃化转变温度进行了研究，结果表明这种双组分水性树脂具有极佳的涂膜性能。用 PHDI 进行改性不仅能显著延长聚合物涂层的耐水时间，还能提高涂层硬度，同时保持含硅树脂与基材的良好粘附性。本研究介绍了一种合成低成本、高性能水性丙烯酸酯树脂的新方法。

{"title":"Preparation and properties of vinyltriethoxysilane-modified waterborne acrylate resins","authors":"Jinmei Ma , Shiyan Zhou , Yaqi Wang , Rong Chen , Shuai Wang , Fenghua Zhang , Yu-Peng He","doi":"10.1016/j.polymer.2024.127781","DOIUrl":"10.1016/j.polymer.2024.127781","url":null,"abstract":"<div><div>Silicone-modified waterborne polyacrylate resins were created using semi-continuous emulsion polymerization. Vinyltriethoxysilane (A151) was used as a modified monomer. Two-component waterborne coatings were then prepared by adding poly (hexamethylene diisocyanate) (PHDI) as a curing agent to the A151-modified polyacrylate resins for the first time. The reaction mechanism of the acrylate copolymer and the curing mechanism of the coating were demonstrated using Fourier transform infrared spectroscopy (FTIR). The modification significantly improved the hydrophobicity and thermal stability of the coating, as confirmed by increased contact angle measurement and thermogravimetric (TG) analysis. Water absorption was reduced from 35 % to 10 % while maintaining optimal adhesion levels. Additionally, the low glass transition temperature of the acrylate resin emulsion film was investigated by differential scanning calorimetry (DSC), indicating excellent coating film properties for the two-component waterborne resin. The modification with PHDI not only significantly increased the water resistance time of the polymer coating but also improved the coating hardness while maintaining excellent adhesion of the silicon-containing resin to the substrate. This study introduces a new method for synthesizing low-cost, high-performance waterborne acrylate resins.</div></div>","PeriodicalId":405,"journal":{"name":"Polymer","volume":"314 ","pages":"Article 127781"},"PeriodicalIF":4.1,"publicationDate":"2024-11-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142574670","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Polymer最新文献