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Surface application of different concentrations of chitosan on recycled paper and its impact on packaging properties 不同浓度壳聚糖在再生纸表面的应用及其对包装性能的影响
IF 2.3 4区 材料科学 Q2 Chemistry Pub Date : 2023-03-07 DOI: 10.1007/s11998-022-00743-6
Shubhang Bhardwaj, Prabhjot Kaur, Nishi Kant Bhardwaj, Yuvraj Singh Negi

The present study explored chitosan, a biodegradable nontoxic biopolymer, at different dosages for surface treatment of recycled paper to improve various properties relevant to packaging. Chitosan, at all applied concentrations, improved important paper properties like surface, strength and barrier due to which the low strength paper can also be used as a packaging paper. The effects of surface treatment of chitosan solutions of different concentrations on paper were analyzed by measuring breaking length, burst index, tear index, double fold, stiffness, air permeance, water vapor transmission rate (WVTR), wax pick, tensile energy absorption (TEA), and stretch. After surface treatment by 1% solution of chitosan, the breaking length, double fold, TEA, and stretch in machine direction were increased by 53.8%, 243%, 93%, and 75%, respectively, whereas burst index was increased by 38.4% in comparison with the base paper. The WVTR was reduced from 706 to 496 g/m2/24 h, and air passage time was increased from 18 to 65 Gurley s after surface treatment by 1% chitosan solution on the base paper. The chitosan solution at all the concentrations showed antibacterial activity in plate assay therefore reducing the susceptibility of paper to microbial attack.

Graphical abstract

壳聚糖是一种可生物降解的无毒生物聚合物,研究了壳聚糖在不同剂量下对再生纸进行表面处理,以改善与包装有关的各种性能。壳聚糖在任何浓度下都能改善纸张的重要性能,如表面、强度和阻隔性,因此这种低强度纸张也可以用作包装纸。通过测定不同浓度壳聚糖溶液的断裂长度、破裂指数、撕裂指数、折射率、硬度、透气性、水蒸气透过率(WVTR)、截蜡率、拉伸能吸收(TEA)和拉伸率,分析了不同浓度壳聚糖溶液对纸张表面处理的影响。经1%壳聚糖溶液表面处理后,与原纸相比,断裂长度、双折、TEA和机器方向拉伸分别提高了53.8%、243%、93%和75%,破裂指数提高了38.4%。经1%壳聚糖溶液对原纸进行表面处理后,WVTR由706 g/m2/24 h降至496 g/m2/24 h,空气通过时间由18 Gurley s增加到65 Gurley s。在平板实验中,壳聚糖溶液在所有浓度下均表现出抗菌活性,从而降低了纸张对微生物的敏感性。图形抽象
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引用次数: 3
Influence of impingement flows with sand particles on the barrier properties of organic coatings 含砂粒碰撞流对有机涂层阻隔性能的影响
IF 2.3 4区 材料科学 Q2 Chemistry Pub Date : 2023-03-02 DOI: 10.1007/s11998-022-00739-2
Amin Vedadi, Jordi Estevadeordal, Xinnan Wang, Jiajia Rao, Yechun Wang

The installations of offshore wind farms, especially the type with monopile structures, increase the number of suspended particles in the surrounding area. The offshore wind structures are usually coated with several layers of coatings, including a thin layer of organic coating as a topcoat. In this study, we aim to investigate the influence of the stresses on the organic coatings due to the kinetic energy of the suspended sand particles. To accomplish the goal, impingement flow jets with particles were applied on coated steel samples for a week in a lab-scale impingement chamber. The working fluid for the experiments was 3.5 wt% NaCl solution with 1 wt% suspended sand particles. Electrochemical impedance spectroscopy (EIS) was conducted to monitor the degradation of organic coatings while exposed to the impingement flow. Computational fluid dynamics (CFD) modeling was utilized to calculate the magnitude of the applied fluid stresses on the coatings. Thermodynamics of electrochemical reactions and the activation theories were utilized to compare with the electrochemical parameters. It was concluded that for the lowest flow rate (Q1 = 6.31 cm3/s), the added sand particles started to show destructive influence after the first three days of exposure. As the flow rate increased, the destructive influence of sand particles on coating samples appeared earlier at the beginning of the exposure, and the elements of equivalent circuit model showed larger difference between coatings exposed to pure NaCl solution and those exposed to solution with sand particles. For the highest flow rate (Q3 = 18.93 cm3/s), the destructive influence of sand particles was significant, indicating that for the particulate flows with the velocity of 1 m/s, which is the regular velocity of the underwater zone in shallow sea regions (with a depth of 30 m), the momentum impact of the sand particles plays a vital role in the degradation of the organic coatings.

海上风力发电场的安装,特别是单桩结构的风力发电场,增加了周围地区悬浮颗粒的数量。海上风电结构通常涂有几层涂层,包括一层薄薄的有机涂层作为面漆。在本研究中,我们旨在研究由于悬浮砂颗粒的动能而引起的应力对有机涂层的影响。为了实现这一目标,在实验室规模的冲击室中,将带有颗粒的冲击流射流应用于涂层钢样品上一周。实验工作液为3.5 wt% NaCl溶液和1 wt%悬浮砂粒。采用电化学阻抗谱法(EIS)监测有机涂层在冲击流作用下的降解情况。利用计算流体力学(CFD)模型计算了涂层上施加的流体应力大小。利用电化学反应热力学和活化理论与电化学参数进行了比较。结果表明,在流速最低时(Q1 = 6.31 cm3/s),添加的砂粒在暴露前3天后开始表现出破坏性影响。随着流量的增大,砂粒对涂层试样的破坏作用在暴露初期出现的时间越早,且等效电路模型的元件在纯NaCl溶液下与含砂溶液下的差异越大。在最高流速(Q3 = 18.93 cm3/s)下,沙粒的破坏作用显著,说明对于流速为1 m/s的颗粒流,即浅海区域(深度为30 m)水下区域的规则流速,沙粒的动量冲击对有机膜的降解起着至关重要的作用。
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引用次数: 0
Robust superhydrophilic antifogging coatings by a facile sol–gel method 溶胶-凝胶法制备的坚固的超亲水性防雾涂料
IF 2.3 4区 材料科学 Q2 Chemistry Pub Date : 2023-02-24 DOI: 10.1007/s11998-022-00748-1
Chong Ke, Chenhua Zhang, Huijun Chen, Yongdong Jiang

In this study, a simple one-step sol–gel process was applied to synthesize SiO2-based superhydrophilic antifogging coatings on glass substrates. In this process, Si(OH)4 sol was first prepared and then SiO2 nanoparticles were added to the sol to form coating solutions. The influence of both the Si(OH)4 sol and SiO2 nanoparticle contents on the coating properties was investigated. Their contents have significant effects on the coatings’ properties, including hydrophilicity and surface morphology. The water contact angle of the optimum coating is about 3.4°. Besides, as revealed by the steam test and freeze test, the optimum superhydrophilic coating demonstrates good antifogging properties and an adequate level of mechanical strength as well. Compared to other techniques used to fabricate antifogging coating on glass substrate, the sol–gel-based process developed in this study requires no expensive equipment, and the processing time is largely shortened. Thus, such technique has great potential applications in the field of coating industry.

在本研究中,采用简单的一步溶胶-凝胶法合成了基于sio2的玻璃基超亲水防雾涂层。该工艺首先制备Si(OH)4溶胶,然后在溶胶中加入SiO2纳米粒子形成涂层溶液。研究了Si(OH)4溶胶和SiO2纳米颗粒含量对涂层性能的影响。它们的含量对涂层的亲水性和表面形貌等性能有显著影响。最佳涂层的水接触角约为3.4°。此外,蒸汽试验和冷冻试验表明,最佳的超亲水性涂层具有良好的防雾性能和足够的机械强度。与其他在玻璃基板上制备防雾涂层的技术相比,本研究开发的溶胶-凝胶基工艺不需要昂贵的设备,加工时间大大缩短。因此,该技术在涂料工业领域具有很大的应用潜力。
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引用次数: 0
Characteristics of urushi film prepared through thermal polymerization 热聚合法制备漆膜的特性
IF 2.3 4区 材料科学 Q2 Chemistry Pub Date : 2023-02-24 DOI: 10.1007/s11998-022-00745-4
Chieko Narita, Yoko Okahisa, Saori Kitaguchi, Kazushi Yamada

Urushi (oriental lacquer) is a natural material that forms thin films with excellent durability and water resistance. There are two methods for curing urushi: oxidative and thermal polymerizations. Urushi is mainly applied to wood; therefore, the oxidative polymerization method has mainly been used to cure it. Oxidative polymerization requires temperature and humidity control and takes a long time to fully cure urushi. Urushi mixed with pigments has poor coloration. In contrast, the use of a thermal polymerization reaction can achieve curing in a short time. In this study, we focused on the thermal curing reaction of urushi, formed 13 different colored urushi coating films, and investigated their properties and coloration. We observed that urushi coatings produced through thermal polymerization took less time to cure than those produced through oxidative polymerization, and that urushi coatings with better coloration and high water repellency were obtained.

漆(东方漆)是一种天然材料,形成薄膜,具有优异的耐久性和耐水性。漆的固化有两种方法:氧化聚合和热聚合。漆主要用于木材;因此,主要采用氧化聚合法对其进行固化。氧化聚合需要控制温度和湿度,需要很长时间才能完全固化漆。与颜料混合的漆着色性差。相比之下,采用热聚合反应可以在短时间内实现固化。在本研究中,我们重点研究了漆石的热固化反应,形成了13种不同颜色的漆石涂层,并对其性能和着色进行了研究。结果表明,采用热聚合法制备的涂料比氧化聚合法制备的涂料固化时间短,而且具有更好的显色性和较高的防水性。
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引用次数: 3
Preparation of 3-alkoxy-2-hydroxypropyl ester of 2-ethylhexanoic acid and its application in polymer latexes and coatings 2-乙基己酸3-烷氧基-2-羟丙酯的制备及其在聚合物乳液和涂料中的应用
IF 2.3 4区 材料科学 Q2 Chemistry Pub Date : 2023-02-22 DOI: 10.1007/s11998-022-00741-8
Xinru Zou, Yi-en Yuan, Yong-xin Ji

In recent years, most of the coalescing aids commonly used in the market contain volatile organic compounds (VOCs) with low boiling point. Herein, we designed and prepared a novel environmentally friendly coalescing aid, 2-ethylhexanoic acid-3-alkoxy-2-hydroxypropyl ester. Under the action of a catalyst, 2-ethylhexanoic acid and alkyl glycidyl ether were used as raw materials for ring-opening esterification reaction, and 2-ethylhexanoic acid-3-alkoxy-2-hydroxypropyl ester was finally generated. We conducted a single-factor experiment and orthogonal experiment L9(34) to explore the optimal reaction conditions. The structure of the product was characterized by 1HNMR and FTIR. The boiling point of the product was determined to be 270–283°C, which was in line with the requirements of the national environmental protection regulations for VOCs. Compared with traditional coalescing aids, the product has low volatility, is not classified as a VOC and is safe and environmentally friendly. The properties of the product were characterized, and the applications of the product in polymer latex and coating were determined. We measured the minimum film-forming temperature (MFFT), atomic force microscopy (AFM), water absorption, scrub resistance, adhesion, color difference, and other properties of the film. The results show that the performance of the new coalescing aid is superior to Texanol (2,2,4-trimethyl-1,3-pentanediol monoisobutyrate), which is commonly used in the market, and it has obvious advantages.

近年来,市场上常用的聚结剂大多含有低沸点的挥发性有机化合物。本文设计并制备了一种新型环保型聚结剂-2-乙基己酸-3-烷氧基-2-羟丙基酯。在催化剂的作用下,以2-乙基己酸和烷基缩水甘油醚为原料进行开环酯化反应,最终得到2-乙基己酸-3-烷氧基-2-羟丙基酯。通过单因素实验和正交实验L9(34)探索最佳反应条件。用1HNMR和FTIR对产物的结构进行了表征。经测定,产品沸点为270-283℃,符合国家环保法规对VOCs的要求。与传统的聚结剂相比,该产品挥发性低,不属于VOC,安全环保。对产物的性能进行了表征,确定了产物在聚合物乳胶和涂料中的应用。我们测量了薄膜的最低成膜温度(MFFT)、原子力显微镜(AFM)、吸水性、耐擦洗性、附着力、色差等性能。结果表明,新型聚结剂的性能优于市场上常用的Texanol(2,2,4-三甲基-1,3-戊二醇单异丁酸酯),具有明显的优势。
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引用次数: 0
Plasma deposition of silver nanoparticles onto poly(ethylene terephthalate) surfaces for the preparation of antimicrobial materials 等离子沉积纳米银到聚对苯二甲酸乙酯表面用于制备抗菌材料
IF 2.3 4区 材料科学 Q2 Chemistry Pub Date : 2023-02-21 DOI: 10.1007/s11998-022-00752-5
Hanène Salmi-Mani, Grégory Balthazar, Christophe J. Atkins, Caroline Aymes-Chodur, Patrick Ribot, Gabriel Terreros, Nadine Barroca-Aubry, Christophe Regeard, Philippe Roger

Poly(ethylene terephthalate) (PET) films were surface-modified according to microwave plasma activation allowing for dithiol functions grafting (1,6-hexanedithiol) in order to fabricate self-assembled photogenerated silver nanoparticles monolayers. The present study was carried out in constant discharge power conditions and the impact of the plasma treatment on PET wettability properties were reported. PET material modifications were characterized at various stages of the process: plasma activation, dithiol functionalization, and nanosilver grafting according to several experimental techniques: water contact angle measurements and X-ray photoelectron spectroscopy (XPS). The surface topography was studied by atomic force microscopy (AFM). Finally, antibacterial properties of PET material including silver nanoparticles were evaluated to determine the probability to reduce the surface bacterial adhesion of Staphylococcus aureus strain selected as pathogenic bacteria model. Surface grafted with silver nanoparticles was found to be particularly reactive and led to an inhibition of S. aureus adhesion around 96.2% in comparison with the unmodified PET material.

利用微波等离子体活化对聚对苯二甲酸乙酯(PET)薄膜进行表面修饰,允许二硫醇功能接枝(1,6-己二硫醇),以制备自组装光生银纳米颗粒单层。本研究在恒放电条件下进行,并报道了等离子体处理对PET润湿性的影响。根据水接触角测量和x射线光电子能谱(XPS)等实验技术,在等离子体活化、二硫醇功能化和纳米银接枝等不同阶段对PET材料的改性进行了表征。用原子力显微镜(AFM)研究了表面形貌。最后,对含银纳米粒子的PET材料的抗菌性能进行了评价,以确定其降低金黄色葡萄球菌菌株表面细菌粘附的概率。与未修饰的PET材料相比,表面接枝银纳米粒子的反应性特别强,对金黄色葡萄球菌粘附的抑制率约为96.2%。
{"title":"Plasma deposition of silver nanoparticles onto poly(ethylene terephthalate) surfaces for the preparation of antimicrobial materials","authors":"Hanène Salmi-Mani,&nbsp;Grégory Balthazar,&nbsp;Christophe J. Atkins,&nbsp;Caroline Aymes-Chodur,&nbsp;Patrick Ribot,&nbsp;Gabriel Terreros,&nbsp;Nadine Barroca-Aubry,&nbsp;Christophe Regeard,&nbsp;Philippe Roger","doi":"10.1007/s11998-022-00752-5","DOIUrl":"10.1007/s11998-022-00752-5","url":null,"abstract":"<div><p>Poly(ethylene terephthalate) (PET) films were surface-modified according to microwave plasma activation allowing for dithiol functions grafting (1,6-hexanedithiol) in order to fabricate self-assembled photogenerated silver nanoparticles monolayers. The present study was carried out in constant discharge power conditions and the impact of the plasma treatment on PET wettability properties were reported. PET material modifications were characterized at various stages of the process: plasma activation, dithiol functionalization, and nanosilver grafting according to several experimental techniques: water contact angle measurements and X-ray photoelectron spectroscopy (XPS). The surface topography was studied by atomic force microscopy (AFM). Finally, antibacterial properties of PET material including silver nanoparticles were evaluated to determine the probability to reduce the surface bacterial adhesion of <i>Staphylococcus aureus</i> strain selected as pathogenic bacteria model. Surface grafted with silver nanoparticles was found to be particularly reactive and led to an inhibition of <i>S. aureus</i> adhesion around 96.2% in comparison with the unmodified PET material.</p></div>","PeriodicalId":48804,"journal":{"name":"Journal of Coatings Technology and Research","volume":null,"pages":null},"PeriodicalIF":2.3,"publicationDate":"2023-02-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s11998-022-00752-5.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"4816065","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 1
Effects of latex and thickener polarities on rheology and phase stability of latex–HEUR mixtures 乳胶和增稠剂极性对乳胶- heur混合物流变学和相稳定性的影响
IF 2.3 4区 材料科学 Q2 Chemistry Pub Date : 2023-02-14 DOI: 10.1007/s11998-022-00746-3
Travis Smith, David Chisholm, Abby Cheng, Juan Ortiz Salazar, Lia Roccucci, Bailey Morales, Gary Dombrowski, John Rabasco, Patrick Hartnett, Ray Fernando

In this study, hydrophobically modified, ethoxylate urethanes (HEURs) and latexes of well-defined structure and composition were used to examine the rheology and phase behavior of HEUR–latex mixtures. The mixtures comprised one of four HEURs that were synthesized with varying molecular weight polyethylene glycols (PEG 35 K, 20 K, 12 K, and 8 K) and end-capped with octadecyl hydrophobes, as well as one of two latexes (butyl acrylate/styrene [BA-Sty] and butyl acrylate/methyl methacrylate [BA-MMA]) that each contained a small amount of methacrylic acid. The two experimental latexes represent compositions commonly used in commercial paint formulations. The polarity of the HEURs decreases as the PEG molecular weight decreases and the surface of the styrene containing latex is less polar than that containing methyl methacrylate. In all HEUR–latex mixtures, the latex polymer volume fraction was maintained constant at 0.25 which provides a dispersed component spatial crowdedness that represents a fully formulated paint. All latex–HEUR mixtures were stable at very low (i.e., below 0.10% by weight) HEUR levels. At critical concentrations dependent on the polarity of thickener and latex, flocculation was accompanied by syneresis for latex-thickener mixtures prepared with all HEURs except the one with the longest PEG spacer. Further increase of HEUR levels revealed another critical concentration above which the mixtures were stable. Effects of the latex polarity diminished for the mixtures prepared with more hydrophobic HEURs.

在这项研究中,疏水改性的乙氧基酯聚氨酯(HEURs)和结构和组成明确的乳胶被用来研究启闭乳液混合物的流变学和相行为。该混合物由四种不同分子量的聚乙二醇(PEG 35k、20k、12k和8k)合成的hurs中的一种组成,末端覆盖十八烷基疏水剂,以及两种乳液(丙烯酸丁酯/苯乙烯[BA-Sty]和丙烯酸丁酯/甲基丙烯酸甲酯[BA-MMA])中的一种组成,每种乳液都含有少量的甲基丙烯酸。这两种实验乳胶代表了商业涂料配方中常用的成分。随着PEG分子量的减小,HEURs的极性降低,含苯乙烯乳液的表面极性小于含甲基丙烯酸甲酯的表面极性。在所有的启发式乳胶混合物中,乳胶聚合物的体积分数保持在恒定的0.25,这提供了一个分散的组分空间拥挤,代表了一个完全配方的涂料。所有乳胶- HEUR混合物在非常低(即低于0.10%重量)的HEUR水平下都是稳定的。在取决于增稠剂和乳胶极性的临界浓度下,除具有最长PEG间隔的HEURs外,所有HEURs制备的乳胶-增稠剂混合物都伴随着絮凝作用。进一步增加HEUR水平揭示了混合物稳定的另一个临界浓度。疏水小时数越多,乳胶极性的影响就越小。
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引用次数: 0
Novel bio-based phosphorous-containing UV-curable flame-retardant coatings 新型生物基含磷紫外光固化阻燃涂料
IF 2.3 4区 材料科学 Q2 Chemistry Pub Date : 2023-02-13 DOI: 10.1007/s11998-022-00740-9
Elif Ozman, Cemil Dizman, Hatice Birtane, Memet Vezir Kahraman

In this work, a novel bio-based phosphorus-containing reagent was synthesized and characterized. To obtain a flame retardant agent with acid functionality, 9, 10-dihydro-9-oxa-10-phosphaphenanthrene-10-oxide (DOPO) and bio-based itaconic acid were first reacted. The synthesized acid then was reacted with glycidyl methacrylate to form a difunctional phosphorus-containing methacrylate flame retardant monomer. The flame retardant monomer was added to a reactive monomer matrix with a photoinitiator to prepare UV-curable coatings. The molecular structure of the flame retardant was confirmed by Fourier-transform infrared-attenuated total reflection spectroscopy and proton nuclear magnetic resonance (1H NMR) spectroscopy. The flame retardant behavior of coatings was determined using limiting oxygen index. Thermal behaviors of the films were studied by thermal gravimetric analysis. Furthermore, scanning electron microscopy/energy-dispersive spectroscopy was used to determine the elemental composition and to observe the morphology of the coatings. The properties (water adsorption, gel content, etc.) of the coatings were also studied. It was found that the addition of DOPO resulted in a significant improvement in the flame retardant and thermal properties of the coatings.

本文合成了一种新型的生物基含磷试剂,并对其进行了表征。以9,10 -二氢-9-氧-10-磷菲-10-氧化物(DOPO)和生物基衣康酸为原料,制备了具有酸功能的阻燃剂。将合成的酸与甲基丙烯酸缩水甘油酯反应,制得双官能含磷甲基丙烯酸酯阻燃单体。将该阻燃单体加入到反应性单体基体中,用光引发剂制备紫外光固化涂料。采用傅里叶变换红外衰减全反射光谱和质子核磁共振(1H NMR)光谱对阻燃剂的分子结构进行了确证。用极限氧指数测定了涂层的阻燃性能。用热重分析法研究了膜的热行为。利用扫描电镜和能量色散光谱分析了镀层的元素组成和形貌。研究了涂层的吸附性能、凝胶含量等。结果表明,DOPO的加入显著改善了涂层的阻燃性能和热性能。
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引用次数: 1
Thermal properties of intumescent coating with waterborne melamine-acrylic emulsion resin for plywood 水性三聚氰胺-丙烯酸乳液树脂胶合板膨胀涂层的热性能
IF 2.3 4区 材料科学 Q2 Chemistry Pub Date : 2023-02-08 DOI: 10.1007/s11998-022-00736-5
Chih-Shen Chuang, Po-Heng Lin

A mixture of etherified melamine–formaldehyde and acrylic emulsion resin was designed, with the hybrid resin improving the fire retardancy of indoor plywood as well as the CO and CO2 emissions. The water-based hybrid resin exhibited a single curing peak; the need for solvents was reduced. Compared with pure etherified melamine–formaldehyde resin, the hybrid resin had better flame retardancy and produced less pollution. Scanning electron microscopy and cone calorimetry were conducted, and the analyses revealed that lower binder resin concentrations resulted in improved flame retardancy and better char layer formation. When the binder resin concentrations were increased and CO/CO2 emissions were continued beyond 300 s, the flame retardancy of the intumescent coating was the same as that of the lower binding resin concentrations. Furthermore, the chemical structure and durability of the phosphocarbonaceous structure were verified through Fourier transform infrared spectroscopy and solid-state nuclear magnetic resonance analyses.

设计了一种醚化三聚氰胺甲醛与丙烯酸乳液树脂的混合物,该混合树脂改善了室内胶合板的阻燃性,并降低了CO和CO2的排放。水性杂化树脂呈现单一固化峰;减少了对溶剂的需求。与纯醚化三聚氰胺甲醛树脂相比,混合树脂具有更好的阻燃性和更少的污染。扫描电镜和锥量热分析表明,较低的粘结剂树脂浓度提高了阻燃性,有利于炭层的形成。当黏结树脂浓度增加且CO/CO2排放持续超过300 s时,膨胀涂层的阻燃性与较低黏结树脂浓度时相同。此外,通过傅里叶变换红外光谱和固态核磁共振分析验证了磷碳质结构的化学结构和耐久性。
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引用次数: 0
The preparation and study of functionalized graphene oxide/self-healing waterborne polyurethane composites 功能化氧化石墨烯/自愈水性聚氨酯复合材料的制备与研究
IF 2.3 4区 材料科学 Q2 Chemistry Pub Date : 2023-02-07 DOI: 10.1007/s11998-022-00732-9
Zhiqiang Li, Zhaoyang Zhang, Shouxiang Liu, Yang Qiao, Yanyan Wei

In this study, silane coupling agent KH560-FA containing furan groups was synthesized to modify the surface of graphene oxide, and maleimide group-capped waterborne polyurethane was synthesized at the same time. A self-healing material with a microcrosslinking network structure based on polymer/modified graphene oxide was synthesized by Diels–Alder (DA) reaction. The materials obtained can control the formation and fracture of DA chemical bonds under thermal stimulation and repair the damage macroscopically. With the addition of modified graphene oxide from 0 wt% to 0.4 wt%, the tensile strength of the material increased from 3.59 MPa to 15.27 MPa, the repair efficiency reached a maximum of 89.19%, the water contact angle increased from 61° to 77°, and the water absorption decreased from 10.52% to 3.40%. The addition of modified graphene oxide significantly improved the hydrophobicity and mechanical properties of the material. When the addition of KH560-FA-GO was 0.4 wt%, the corrosion resistance of the coating prepared by the emulsion was remarkably improved in deionized water, 5% sodium chloride solution, and 5% sulfuric acid solution. It showed the application potential of materials in the field of coatings.

本研究合成了含呋喃基团的硅烷偶联剂KH560-FA,对氧化石墨烯表面进行改性,同时合成了马来酰亚胺基包封的水性聚氨酯。采用Diels-Alder (DA)反应合成了一种基于聚合物/改性氧化石墨烯的微交联网络自愈材料。所制备的材料能够在热刺激下控制DA化学键的形成和断裂,并在宏观上修复损伤。当改性氧化石墨烯的添加量从0 wt%增加到0.4 wt%时,材料的抗拉强度从3.59 MPa增加到15.27 MPa,修复效率达到最大值89.19%,水接触角从61°增加到77°,吸水率从10.52%下降到3.40%。改性氧化石墨烯的加入显著改善了材料的疏水性和力学性能。当KH560-FA-GO添加量为0.4 wt%时,乳液制备的涂层在去离子水、5%氯化钠溶液和5%硫酸溶液中的耐蚀性显著提高。显示了材料在涂料领域的应用潜力。
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引用次数: 0
期刊
Journal of Coatings Technology and Research
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