Reactive & Functional Polymers最新文献_第7页

Investigation of mechanical, barrier, and antibacterial properties of PBST composites strengthened with KH-570 silane-coated MgO/Ag nanoparticles KH-570硅烷包覆MgO/Ag纳米颗粒增强PBST复合材料的力学、屏障和抗菌性能研究

IF 4.5 3区工程技术 Q1 CHEMISTRY, APPLIED

Reactive & Functional Polymers

Pub Date : 2024-11-25 DOI: 10.1016/j.reactfunctpolym.2024.106112

Xiangliang Meng , Jie Zhang , Honghui Guo , Jian Gao , Wei Li , Yuling Wu , Hong Yan , BaoLong Niu

MgO/Ag nanoparticles (NPs) have been surface modified with the silane coupling agent KH-570. The modified NPs (KMA) were added to poly (butylene succinate-co-terephthalate) (PBST) to prepare the K-PMA composite films. The modification improved the compatibility between MgO/Ag NPs and PBST matrix. The study comprehensively investigated the effects of modified MgO/Ag NPs on the mechanical, antibacterial, and preservation properties of bio-nanocomposite films. The incorporation of NPs substantially improved the mechanical and barrier properties of the PBST matrix. The composite films exhibited the best overall performance when the nanoparticle content is 3 %. In particular, the elongation at break, tensile strength, and water vapor permeability (WVP) were 794.67 %, 32.20 MPa, and 1.53 × 10⁻¹¹ g·m/m²·s·Pa, respectively. Furthermore, the K-PMA-3 composite film exhibited excellent antibacterial properties and food preservation performance. The inhibition rates against Staphylococcus aureus (S. aureus), Escherichia coli (E. coli), and Salmonella paratyphi B (S. paratyphi B) were all over 98 %. After 6 days of preservation experiments, the mass loss of cherry tomatoes wrapped with K-PMA-3 film was only 5.9 %, which was only 45 % of the mass loss of cherry tomatoes wrapped with PMA-3 film. The results showed that the prepared biofilms have a great potential to be used as food packaging films.

用硅烷偶联剂KH-570对MgO/Ag纳米颗粒进行了表面改性。将改性后的NPs （KMA）加入到聚丁二甲酸丁二酯（PBST）中，制备K-PMA复合薄膜。改性提高了MgO/Ag纳米粒子与PBST基体的相容性。本研究全面考察了改性MgO/Ag NPs对生物纳米复合膜的力学、抗菌和保存性能的影响。NPs的加入大大改善了PBST基质的力学和屏障性能。当纳米颗粒含量为3%时，复合膜的综合性能最佳。断裂伸长率为794.67%，抗拉强度为32.20 MPa，水蒸气透气性为1.53 × 10−11 g·m/m2·s·Pa。此外，K-PMA-3复合膜具有优异的抗菌性能和食品保鲜性能。对金黄色葡萄球菌（S. aureus）、大肠杆菌（E. coli）和副伤寒沙门氏菌（S. paratyphi B）的抑制率均在98%以上。保鲜实验6 d后，K-PMA-3膜包裹的圣女果质量损失仅为5.9%，仅为PMA-3膜包裹的圣女果质量损失的45%。结果表明，所制备的生物膜具有很大的食品包装膜应用潜力。

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引用次数: 0

Efficient oil-water separation using superhydrophobic OPA-MOF-5@PDMS@PU sponge for environmental remediation 利用超疏水OPA-MOF-5@PDMS@PU海绵高效油水分离进行环境修复

IF 4.5 3区工程技术 Q1 CHEMISTRY, APPLIED

Reactive & Functional Polymers

Pub Date : 2024-11-24 DOI: 10.1016/j.reactfunctpolym.2024.106111

Linlin Yu, Ruoyu Chen, Qian Jia

Oily wastewater, especially oil-water emulsions, has caused severe environmental damage. It is urgent to develop a simple, efficient superhydrophobic and superoleophilic material to address this issue. In this work, a multifunctional sponge based on MOF was proposed. The hydroxy-assisted method was employed to prepare MOF-5 with metal coordination centers. Subsequently, octadecylphosphonic acid (OPA) was used to hydrophobically modify MOF-5 to prepare stable and hydrophobic OPA-MOF-5. Polydimethylsiloxane (PDMS) with low surface energy was employed as the adhesive, and the hydrophobic OPA-MOF-5 was loaded onto the polyurethane (PU) sponge to obtain the stable superhydrophobic OPA-MOF-5@PDMS@PU with a WCA of 155.9°. The produced modified sponge exhibited high sorption capacity and oil-water separation efficiency, with a sorption capacity of 26.7 (petroleum ether)-85.6 (chloroform) g/g and a separation efficiency of over 99 %. It has also shown satisfactory emulsion purification and flame retardancy capacities.

含油废水，特别是油水乳液，对环境造成了严重的破坏。迫切需要开发一种简单、高效的超疏水和超亲油材料来解决这一问题。本文提出了一种基于MOF的多功能海绵。采用羟基辅助法制备了具有金属配位中心的MOF-5。随后，利用十八烷基膦酸（OPA）对MOF-5进行疏水改性，制备出稳定、疏水的OPA-MOF-5。采用低表面能的聚二甲基硅氧烷（PDMS）作为胶粘剂，将疏水的OPA-MOF-5加载到聚氨酯（PU）海绵上，得到WCA为155.9°的稳定超疏水OPA-MOF-5@PDMS@PU。所得改性海绵具有较高的吸附量和油水分离效率，吸附量为26.7（石油醚）-85.6（氯仿）g/g，分离效率达99%以上。它还显示出令人满意的乳液净化和阻燃能力。

引用次数: 0

Electrospun polyvinyl alcohol/chitosan nanofibers modified with carbon nanotubes and sliver particles for electrochemical sensor application 以碳纳米管和银粒子改性的静电纺聚乙烯醇/壳聚糖纳米纤维用于电化学传感器

IF 4.5 3区工程技术 Q1 CHEMISTRY, APPLIED

Reactive & Functional Polymers

Pub Date : 2024-11-23 DOI: 10.1016/j.reactfunctpolym.2024.106110

Jing Chen , Fei Rong , Yibing Xie

Polyvinyl alcohol (PVA)/chitosan (CS) nanofibers modified with carbon nanotubes (CNT) and silver (Ag) particles are electrospun onto a graphite plate (GP) substrate to form the PVA-CS-CNT-Ag/GP electrode for electrochemical sensor application. Microstructure characterization demonstrates that PVA-CS nanofibers exhibit a loose and porous network structure, significantly improving the effective reaction surface area. Electrochemical measurements show the PVA-CS-CNT-Ag/GP electrode exhibits the limit of detection of 23.2 μM, the linear range of 65–176,460 μM and the sensitivity of 3.3945 μA cm⁻² mM⁻¹. Anti-interference test results show that the sensor has high selectivity towards H₂O₂. Stability test results indicate that the sensor exhibits good stability, as evidenced by the response current of 83.94 % after a period of 30 days. Simulation calculations indicate that PVA-CS-CNT-Ag exhibits lower interfacial energy (−2.3293 eV) compared to PVA-CS-CNT (−0.3674 eV) and PVA-CS-Ag (−0.7646 eV), smaller band gap (0.318 eV) compared to PVA-CS (3.640 eV), higher density of states at Fermi level (14.7332 electrons/eV) than others. Experimental measurements and simulation calculations indicate that PVA-CS-CNT-Ag electrospun nanofibers exhibit promising potential as an electroactive material for the electrochemical detection of H₂O₂.

将碳纳米管（CNT）和银（Ag）粒子修饰的聚乙烯醇(PVA)/壳聚糖（CS）纳米纤维静电纺丝到石墨板（GP）衬底上，形成用于电化学传感器的PVA-CS-CNT-Ag/GP电极。微观结构表征表明，PVA-CS纳米纤维具有疏松多孔的网状结构，显著提高了有效反应表面积。电化学测试结果表明，PVA-CS-CNT-Ag/GP电极的检出限为23.2 μM，线性范围为65 ~ 176,460 μM，灵敏度为3.3945 μA cm−2 mM−1。抗干扰测试结果表明，该传感器对H2O2具有较高的选择性。稳定性测试结果表明，传感器具有良好的稳定性，30 d后的响应电流为83.94%。模拟计算表明，与PVA-CS- cnt （- 0.3674 eV）和PVA-CS- ag （- 0.7646 eV）相比，PVA-CS- ag具有更低的界面能（- 2.3293 eV），带隙（0.318 eV）比PVA-CS （3.640 eV）更小，费米能级态密度（14.7332电子/eV）更高。实验测量和模拟计算表明，PVA-CS-CNT-Ag静电纺纳米纤维作为电化学检测H2O2的电活性材料具有良好的潜力。

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引用次数: 0

Custom-shaped malleable, recyclable and reversible structural adhesives based on vanillin polyimine vitrimers 基于香兰素聚酰亚胺玻璃体的定制形状可塑，可回收和可逆的结构粘合剂

IF 4.5 3区工程技术 Q1 CHEMISTRY, APPLIED

Reactive & Functional Polymers

Pub Date : 2024-11-23 DOI: 10.1016/j.reactfunctpolym.2024.106109

Anna Vilanova-Pérez , Marc Surós , Àngels Serra , Silvia De la Flor , Adrià Roig

A series of polyimine vitrimers were prepared from a synthesized dialdehyde derivative of vanillin. This derivative was then crosslinked with two different ratios of amines (Jeffamine T403 and m-xylylenediamine), forming imine bonds responsible for the exchange reactions. This process resulted in three distinct materials which exhibited glass transition temperatures (T_gs) ranging from 20 to 60 °C, along with good thermal stability, and strong mechanical and thermomechanical properties.

Their dynamicity resulted in a fast relaxation rate achieving a complete relaxation in less than 15 min at 140 °C. Additionally, the polyimines could be mechanically recycled up to three times without significant loss in their final properties, demonstrating the possible enhancement of their lifespan. Moreover, they could be chemically recycled under mild conditions through acid hydrolysis or transamination, which significantly contributes towards a better circular economy. Furthermore, these vitrimers were tested as reversible structural adhesives, achieving initial lap-shear strength values of 12.4 MPa and up to 97 % of efficiency after re-bonding, highlighting their huge potential for industrial applications. Due to their pre-cured state, these adhesives were malleable, which allow them to be custom-shaped into different complex shapes. Finally, these imine materials showed outstanding self-welding capabilities with the repaired versions showing comparable performance to the original.

以合成的香兰素双醛衍生物为原料，制备了一系列聚亚胺vitrimers。然后，该衍生物与两种不同比例的胺（Jeffamine T403和m-二甲二胺）交联，形成负责交换反应的亚胺键。这一过程产生了三种不同的材料，它们表现出玻璃化转变温度（Tgs）在20到60°C之间，具有良好的热稳定性，以及强大的机械和热机械性能。在140°C下，它们的动态弛豫速率很快，在不到15分钟的时间内完全弛豫。此外，聚酰亚胺可以机械回收多达三次，而不会对其最终性能造成重大损失，这表明它们的使用寿命可能会延长。此外，它们可以在温和的条件下通过酸水解或转氨化进行化学回收，这对更好的循环经济有很大的贡献。此外，这些玻璃聚合体作为可逆结构粘合剂进行了测试，其初始拉剪强度值为12.4 MPa，重新粘合后的效率高达97%，这表明它们具有巨大的工业应用潜力。由于它们的预固化状态，这些粘合剂具有延展性，这使得它们可以被定制成不同的复杂形状。最后，这些亚胺材料表现出出色的自焊接能力，修复后的材料表现出与原始材料相当的性能。

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引用次数: 0

Poly(lactic-co-glycolic) acid nanoparticles with thermoresponsive shell for sustained release of dexamethasone 具有热致伸缩性外壳的聚乳酸-共聚乙醇酸纳米颗粒用于地塞米松的持续释放

IF 4.5 3区工程技术 Q1 CHEMISTRY, APPLIED

Reactive & Functional Polymers

Pub Date : 2024-11-20 DOI: 10.1016/j.reactfunctpolym.2024.106107

Marieta Constantin, Sanda Bucatariu, Liviu Secarescu, Adina Coroaba, Elena-Laura Ursu, Gheorghe Fundueanu

Polymeric nanocarriers based on poly(lactide-co-glycolide) (PLGA) enable drug encapsulation while achieving increased solubility of hydrophobic drugs, enhanced plasmatic half-life, and protecting the drug from early degradation/metabolization. Nevertheless, it is still difficult to effectively regulate the drug release from nanocarriers. Covering the surface of PLGA nanoparticles (NPs) with a thermoresponsive shell may be the key factor for building drug delivery systems with temporal and spatial control. In this respect, PLGA NPs with a mean size of 212 nm, containing dexamethasone (Dex) (Dex/PLGA NPs) have been produced by the dialysis technique without the use of a surfactant. Then, the nanoparticles were covered with poly(N-isopropylacrylamide-co-4-vinyl pyridine) (PVP) by ionic interactions between the amine groups of the PVP and carboxylic groups of PLGA. FT-IR and XPS spectroscopy were used to identify the new functional groups introduced on the PLGA nanoparticles' surface. The assembly of PVP on the PLGA NPs was analyzed by monitoring the particle size with temperature, zeta potential, AFM, and TEM analysis. The in vitro drug delivery investigation showed that temperature has significant control over the release rate of Dex from PVP-coated PLGA NPs. The thermosensitive polymer is hydrated at temperatures lower than LCST (20 °C) and forms a gel around the nanoparticles slowing down the release rate of Dex. Above the LCST, PVP becomes hydrophobic, collapses, inducing a substantially slower and sustained release of Dex, with 84 % released at 200 h.

基于聚乳酸-聚乙二醇醚（PLGA）的聚合物纳米载体可在提高疏水性药物的溶解度、延长质半衰期以及保护药物不被早期降解/代谢的同时实现药物封装。尽管如此，要有效调节纳米载体的药物释放仍然十分困难。在聚乳酸（PLGA）纳米颗粒（NPs）表面覆盖一层热致伸缩壳可能是构建具有时间和空间控制能力的给药系统的关键因素。为此，我们采用透析技术，在不使用表面活性剂的情况下制备了含有地塞米松（Dex）、平均粒径为 212 nm 的 PLGA NPs（Dex/PLGA NPs）。然后，通过 PVP 的胺基与 PLGA 的羧基之间的离子相互作用，在纳米颗粒上覆盖聚（N-异丙基丙烯酰胺-4-乙烯基吡啶）（PVP）。傅立叶变换红外光谱（FT-IR）和 XPS 光谱用于鉴定 PLGA 纳米粒子表面引入的新官能团。通过温度、ZETA 电位、原子力显微镜和 TEM 分析监测粒度，分析了 PVP 在 PLGA NPs 上的组装情况。体外给药研究表明，温度对 PVP 包覆的 PLGA NPs 释放 Dex 的速率有显著的控制作用。热敏性聚合物在温度低于 LCST（20 °C）时会水化，并在纳米粒子周围形成凝胶，从而减缓 Dex 的释放速度。当温度高于 LCST 时，PVP 变得疏水并塌缩，导致 Dex 的释放速度大大降低并持续释放，在 200 小时内释放了 84%。

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引用次数: 0

Design of a non-oxidative adhesive dopamine-grafted hyaluronic acid/NOCC hydrogel for enhanced cell spheroid formation and soft tissue regeneration 设计一种非氧化粘附性多巴胺接枝透明质酸/NOCC 水凝胶，以增强细胞球体形成和软组织再生能力

IF 4.5 3区工程技术 Q1 CHEMISTRY, APPLIED

Reactive & Functional Polymers

Pub Date : 2024-11-19 DOI: 10.1016/j.reactfunctpolym.2024.106108

Vo Minh Quan , Khoi Minh Le , Hua Thanh Dat , Pham-Tran Hai Van , My-An Tran Le , Kieu Thi-Thuy Nguyen , Dai Phu Huynh , Hoan Ngoc Doan , Thi-Hiep Nguyen

Tissue adhesive hydrogels from dopamine represent a compelling material with diverse applications across engineering and medical fields. Although numerous designed adhesive hydrogels have been developed, significant limitations have arisen from the reliance on hydrogen peroxide as an activating agent for crosslinking hydrogels. To address this, our study investigates an innovative approach to create an adhesive and biocompatible hydrogel from dopamine conjugated-hyaluronic acid (Da-HA) and N, O-Carboxymethyl Chitosan (NOCC) without the need for oxidative agent treatment for use in biomedical engineering application. The reactions were performed under mild alkaline conditions, vigorous stirring, and curing, resulting in DHC hydrogels. Proper modification and reactions in the hydrogel matrix were confirmed by NMR spectroscopy and Fourier transform infrared spectroscopy (FTIR). The gelling and tissue adhesive properties of the produced DHC hydrogel are proportional to the Da-HA content in the hydrogel. Scanning electron microscopy revealed changes in pore walls among samples and pore diameters ranging from 100 to 300 nm. Rheological analysis demonstrated a high visco-elastic material and self-healing properties. Importantly, the growth of L929 cell spheroids was noted upon their cultivation atop the designed hydrogel. The material holds significant promise for 3D printing and cell encapsulation therapies, as well as in situ tissue repair, particularly for mechanically dynamic tissues like the dermis.

多巴胺组织粘合水凝胶是一种引人注目的材料，可广泛应用于工程和医学领域。虽然已开发出许多设计的粘合水凝胶，但由于依赖过氧化氢作为交联水凝胶的活化剂，因此存在很大的局限性。为了解决这个问题，我们的研究采用了一种创新方法，利用多巴胺共轭透明质酸（Da-HA）和 N，O-羧甲基壳聚糖（NOCC），在生物医学工程应用中无需氧化剂处理就能生成具有粘合性和生物相容性的水凝胶。反应在弱碱性条件下进行，剧烈搅拌并固化，最终得到 DHC 水凝胶。核磁共振光谱和傅立叶变换红外光谱（FTIR）证实了水凝胶基质中的适当改性和反应。所制得的 DHC 水凝胶的胶凝和组织粘合性能与水凝胶中的 Da-HA 含量成正比。扫描电子显微镜显示，不同样品的孔壁发生了变化，孔径从 100 纳米到 300 纳米不等。流变学分析表明，这种材料具有高粘弹性和自愈合特性。重要的是，在所设计的水凝胶上培养 L929 细胞球体时，发现它们在生长。这种材料在三维打印和细胞封装疗法以及原位组织修复方面大有可为，尤其适用于像真皮这样的机械动态组织。

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引用次数: 0

Simultaneous enhancement of thermal and dielectric properties of phthalonitrile resin via an organic-inorganic hybrid approach 通过有机-无机混合方法同时增强邻苯二腈树脂的热性能和介电性质

IF 4.5 3区工程技术 Q1 CHEMISTRY, APPLIED

Reactive & Functional Polymers

Pub Date : 2024-11-18 DOI: 10.1016/j.reactfunctpolym.2024.106105

Beibei Ji, Jiajie Lyu, Yue Pan, Changping Yin, Wei Liao, Suli Xing, Nan Wu

The usage of high-performance phthalonitrile (PN) resin has become increasingly common in the aerospace fields. However, achieving the balance between low dielectric under high frequency and high thermal stability remains a challenge. This study presented an organic-inorganic hybrid method to improve synchronously the thermal and dielectric properties of the resin, via the covalent bond to uniformly disperse epoxy polyhedral oligomeric silsesquioxanes (EP-POSS) into PN resin. The results indicate that EP-POSS significantly affect the curing mechanism of PN resin, and the main structure of cross-linking network changes from triazine to low polarity and more stable phthalocyanine. Compared to pure PN resin, the dielectric constant and dielectric loss at 10.5 GHz of the sample containing 1 wt% EP-POSS reduced from 3.55 and 0.013 to 3.37 and 0.006. Furthermore, POSS-containing polymers presented superior thermal and thermal oxidation stability with T_d5% of 564–567 °C and T_g above 500 °C. The formed SiO₂ layer on the resin surface during the high-temperature sintering protected the structural integrity effectively. This study provides novel insights into the development and application of PN resin in extreme environments.

在航空航天领域，高性能邻苯二腈（PN）树脂的使用越来越普遍。然而，如何在高频率下实现低介电常数与高热稳定性之间的平衡仍是一个挑战。本研究提出了一种有机-无机混合方法，通过共价键将环氧多面体低聚硅倍半氧烷（EP-POSS）均匀分散到 PN 树脂中，从而同步改善树脂的热性能和介电性能。结果表明，EP-POSS 显著影响了 PN 树脂的固化机理，交联网络的主体结构由三嗪变成了低极性、更稳定的酞菁。与纯 PN 树脂相比，含 1 wt% EP-POSS 的样品在 10.5 GHz 频率下的介电常数和介电损耗分别从 3.55 和 0.013 降至 3.37 和 0.006。此外，含 POSS 的聚合物具有优异的热稳定性和热氧化稳定性，Td5% 为 564-567 ℃，Tg 超过 500 ℃。高温烧结过程中在树脂表面形成的二氧化硅层有效地保护了结构的完整性。这项研究为 PN 树脂在极端环境中的开发和应用提供了新的见解。

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引用次数: 0

A versatile method for preparing cyclic polyurethanes 制备环状聚氨酯的多功能方法

IF 4.5 3区工程技术 Q1 CHEMISTRY, APPLIED

Reactive & Functional Polymers

Pub Date : 2024-11-16 DOI: 10.1016/j.reactfunctpolym.2024.106106

Jianzhi Zheng , Changjuan Guo , Hao Ding , Ying Wu , Ke Zhang

A versatile method was developed to specifically prepare well-defined cyclic polyurethanes based on the combination of a controlled ring-opening polymerization (ROP) of macrocyclic monomers and a self-accelerating double-strain promoted azide-alkyne click ring-closing reaction (DSPAAC). In this approach, the controlled ROP of macrocycles was used to prepare azide-terminated telechelic polyurethanes with controlled molecular weights, narrow dispersities, and sequence-defined and functional backbone structures. The self-accelerating DSPAAC reaction was then used to ring-close the well-defined telechelic polyurethanes with azide terminal groups and prepare the corresponding cyclic polyurethanes using sym-dibenzo-1,5-cyclooctadiene-3,7-diyne (DIBOD) as the small linker. Assisted by slowly feeding a polyurethane solution into a DIBOD solution, this bimolecular ring-closing approach could reach a productivity of ca. 0.8 g/L for the formation of cyclic polyurethanes with varied backbone structures.

通过将大环单体的受控开环聚合（ROP）与自加速双应变促进叠氮-炔烃点击闭环反应（DSPAAC）相结合，开发出了一种专门制备定义明确的环状聚氨酯的多功能方法。在这种方法中，大环单体的可控 ROP 被用来制备叠氮封端远切聚氨酯，这种聚氨酯具有可控的分子量、较窄的分散性以及序列定义的功能性骨架结构。然后，利用自加速 DSPAAC 反应，用叠氮末端基团对定义明确的远志聚氨酯进行闭环，并用共-二苯并-1,5-环辛二烯-3,7-二炔（DIBOD）作为小连接体制备相应的环状聚氨酯。通过将聚氨酯溶液缓慢加入到 DIBOD 溶液中，这种双分子闭环方法可以达到约 0.8 克/升的生产率，从而形成具有不同骨架结构的环状聚氨酯。

引用次数: 0

Grafting of phosphonylated polymers onto 3D printed polycaprolactone scaffolds improves osteoblasts proliferation and calcium mineralization in-vitro 在 3D 打印聚己内酯支架上接枝膦酰化聚合物可提高成骨细胞增殖和体外钙矿化率

IF 4.5 3区工程技术 Q1 CHEMISTRY, APPLIED

Reactive & Functional Polymers

Pub Date : 2024-11-15 DOI: 10.1016/j.reactfunctpolym.2024.106103

Gabriel Roulhac De Rochebrune , Jean-Sébastien Baumann , M. Lecouvey , Thibaut Legigan , Julia Deschamp , Céline Falentin-Daudré

Prosthesis implantation or bone grafting are currently used to treat bone defects induced by osteoporosis, bone tumors or fractures. However, these conventional surgical techniques can lead to significant complications, including infection, loosening, and rejection. Consequently, additional surgeries or even amputation of the affected limb may become necessary. In this context, advancing the strategies used for bone repair remains a critical challenge. The present preliminary study outlines a method for developing biodegradable and bioactive PCL implants with improved osteoblast biological response for bone regeneration., vinylbenzylphosphonic acid (VBP) monomer was grafted and polymerized onto the 3D printed cylindrical polycaprolactone (PCL) implants using a two-step UV irradiation process. To refine and optimize the grafting conditions, key parameters such as ozonation time, UV irradiation duration, and reaction medium were adjusted. The success of the grafting process was assessed using various characterization techniques, including colorimetry, contact angle measurements, scanning electron microscopy (SEM), energy-dispersive X-ray spectroscopy (EDS), Attenuated Total Reflection-Fourrier Transform Infrared Spectroscopy (ATR-FTIR), differential scanning calorimetry (DSC), and size-exclusion chromatography (SEC). Furthermore, a study of the cellular response focusing on viability, morphology, and mineralization was conducted using mouse preosteoblasts (MC3T3-E1 cell line). The results demonstrated the beneficial effects of grafting a bioactive polymer containing a phosphonate group onto implant surfaces.

假体植入或骨移植目前用于治疗骨质疏松症、骨肿瘤或骨折引起的骨缺损。然而，这些传统的外科技术可能会导致严重的并发症，包括感染、松动和排斥反应。因此，可能需要进行额外的手术，甚至截肢。在这种情况下，推进骨修复策略的发展仍然是一项严峻的挑战。本初步研究概述了一种开发可生物降解且具有生物活性的 PCL 植入物的方法，这种植入物可改善成骨细胞对骨再生的生物反应。为了完善和优化接枝条件，对臭氧时间、紫外辐照持续时间和反应介质等关键参数进行了调整。接枝过程的成功与否采用了多种表征技术进行评估，包括比色法、接触角测量、扫描电子显微镜（SEM）、能量色散 X 射线光谱（EDS）、衰减全反射-傅立叶变换红外光谱（ATR-FTIR）、差示扫描量热法（DSC）和尺寸排阻色谱法（SEC）。此外，还利用小鼠前成骨细胞（MC3T3-E1 细胞系）对细胞反应进行了研究，重点是细胞活力、形态和矿化。研究结果表明，在植入物表面接枝含有膦酸盐基团的生物活性聚合物会产生有益的影响。

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引用次数: 0

Novel polyethylene glycol methyl ether substituted polysiloxane membrane materials with high CO2 permeability and selectivity 具有高二氧化碳渗透性和选择性的新型聚乙二醇甲醚替代聚硅氧烷膜材料

IF 4.5 3区工程技术 Q1 CHEMISTRY, APPLIED

Reactive & Functional Polymers

Pub Date : 2024-11-15 DOI: 10.1016/j.reactfunctpolym.2024.106102

Е.А. Grushevenko , S.Е. Sokolov , D.N. Kholodkov , А.V. Arzumanyan , N.Yu. Kuznetsov , P.V. Nikul'shin , S.D. Bazhenov , A.V. Volkov , I.L. Borisov , A.L. Maksimov

Membrane gas separation is a promising technology for CO₂ capture. However, one of the key challenges is the development of stable-in-time and highly permeable materials with increased CO₂ permselectivity. In this study, two series of novel polysiloxanes with linear (methyl oligoethyleneglycol allyl ether (PEG8)) and branched (vinyl-bis- [methyltriethyleneglycol] (B-PEG4)) oxygen-containing side substituents were synthesized. By crosslinking PEG-substituted polymethylsiloxanes with polydimethylsiloxane (PDMS), a series of CO₂-highly selective membrane materials with a PDMS content of 6.5–50 wt% was obtained for the first time. The effect of the side chain geometry on the sorption and transport properties of these membranes for different gases (N₂, O₂, CO₂, CH₄, C₂H₆) was evaluated. The specific interactions between the PEG substituents and CO₂ that contribute to the enhanced selectivity of these materials were identified. The introduction of both linear and branched PEG substituents leads to in an increase in the selectivity of diffusion, solubility, and CO₂/gas permeability, compared to PDMS.

The CO₂/N₂ and CO₂/CH₄ permselectivities and diffusion selectivities are increases, as well as the permeability coefficients of the membrane materials for all gases are decreases, as the PDMS content reduces from 50 % to 6.5 % wt. Within the PDMS concentrations range between 6.5 and 12.5 % wt., there was a sharp increase in diffusion and permeability coefficients of membrane materials. For this polysiloxanes with linear PEG substituents, an unexpectedly high diffusion selectivity for CO₂ was observed. Such value determined the maximum CO₂ permselectivity among the polysiloxanes studied. The most promising membrane material from these series was identified as PEG8-substituted polysiloxane with 12.5 wt% PDMS. It has a CO₂ permeability coefficient of 1300 Barrer, CO₂/N₂ selectivity of 37 and CO₂/CH₄ selectivity of 10.

膜气体分离是一种前景广阔的二氧化碳捕集技术。然而，关键的挑战之一是开发具有更高的二氧化碳过选择性的实时稳定的高渗透性材料。本研究合成了两个系列的新型聚硅氧烷，分别具有线性（甲基低聚乙二醇烯丙醚（PEG8））和支链（乙烯基-双[甲基三乙二醇]（B-PEG4））含氧侧取代基。通过将 PEG 取代的聚甲基硅氧烷与聚二甲基硅氧烷（PDMS）交联，首次获得了一系列 PDMS 含量为 6.5-50 wt%的二氧化碳高选择性膜材料。研究评估了侧链几何形状对这些膜对不同气体（N2、O2、CO2、CH4、C2H6）的吸附和传输特性的影响。确定了 PEG 取代基与二氧化碳之间的特定相互作用，这种相互作用有助于提高这些材料的选择性。与 PDMS 相比，引入线性和支化 PEG 取代基可提高扩散选择性、溶解性和二氧化碳/气体渗透性。在重量百分比为 6.5 至 12.5 % 的 PDMS 浓度范围内，膜材料的扩散系数和渗透系数急剧上升。对于这种带有线性 PEG 取代基的聚硅氧烷，二氧化碳的扩散选择性出乎意料地高。这一数值确定了所研究的聚硅氧烷中最大的二氧化碳过选择性。这些系列中最有前途的膜材料是 PEG8 取代的聚硅氧烷（含 12.5 wt%的 PDMS）。它的二氧化碳渗透系数为 1300 巴，二氧化碳/N2 选择性为 37，二氧化碳/CH4 选择性为 10。

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引用次数: 0