Elastomer Reinforced with Regenerated Chitin from Alkaline/Urea Aqueous System.
Elastomer Reinforced with Regenerated Chitin from Alkaline/Urea Aqueous System.
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DOI：
10.1021/acsami.7b08294
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发表时间：
2017-07
影响因子：
9.5
通讯作者：
P. Yu;Hui He;Yuanfang Luo;D. Jia;A. Dufresne
中科院分区：
文献类型：
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作者：
P. Yu;Hui He;Yuanfang Luo;D. Jia;A. Dufresne
首次将甲壳素溶液(低温溶解于碱性/尿素水溶液)引入胶乳中，然后以乙醇为共凝固剂进行共凝聚，制备了新型杂化弹性体/再生甲壳素(R-甲壳素)复合材料。在快速共沉淀过程中，甲壳素溶液在凝固剂诱导下快速凝胶化，生成多孔甲壳质相，胶乳粒子同步破乳形成橡胶相。扫描电子显微镜观察表明，两相同时交织、互穿，形成互穿聚合物网络结构。用热重分析(TGA)、X-射线衍射仪(X射线衍射仪)和溶胀实验对产物进行了表征。R-甲壳素独特的多孔结构可使填料与基质之间产生较强的物理缠结和互锁，从而实现填料与基质之间高效的负荷传递。因此，R-甲壳素赋予弹性体显著的增强作用。可望为甲壳素基互穿网络结构弹性体杂化材料的新设计提供新的思路。
Novel hybrid elastomer/regenerated chitin (R-chitin) composites were developed, for the first time, by introducing chitin solution (dissolved in alkaline/urea aqueous solution at low temperature) into rubber latex, and then cocoagulating using ethanol as the cocoagulant. During the rapid coprecipitation process, the chitin solution showed rapid coagulant-induced gelation and a porous chitin phase was generated, and the rubber latex particles were synchronously demulsificated to form the rubbery phase. The two phases interlaced and interpenetrated simultaneously to form an interpenetrating polymer network (IPN) structure, which was evidenced by SEM observation. The ensuing compound was also characterized by thermogravimetric analysis (TGA), X-ray diffraction (XRD), and swelling experiments. The unique porous structure of R-chitin could result in strong physical entanglements and interlocks between filler and matrix, thus a highly efficient load transfer between the filler and the matrix was achieved. Accordingly, R-chitin endows the elastomer with a remarkable reinforcement. We envisage that this work may contribute new insights on novel design of chitin-based elastomer hybrids with IPN structure.