Propionylation-modified chitin with improved solubility in green ethanol/water binary solvents for sustainable film and coating applications
Propionylation-modified chitin with improved solubility in green ethanol/water binary solvents for sustainable film and coating applications
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DOI：
10.1016/j.jclepro.2019.119458
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发表时间：
2020-03
影响因子：
11.1
通讯作者：
Tuhua Zhong;M. Wolcott;Hang Liu;Jinwu Wang
中科院分区：
文献类型：
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作者：
Tuhua Zhong;M. Wolcott;Hang Liu;Jinwu Wang
使用毒性较小的溶剂对于生物聚合物加工和应用是非常期望的，以满足可持续性，同时减轻环境负担。本研究对甲壳素进行丙酰化改性以提高其溶解性。高度丙酰化甲壳素表现出显着改善的溶解度（高达96%），在二元乙醇/水溶液相比，几乎不溶于单一溶剂（乙醇或水）。用酸化溶液制备的透明薄膜具有优异的力学性能，拉伸强度高达40 MPa，杨氏模量为1.3 GPa。当甲壳素丙酸酯溶液的溶液用作纸基材上的涂层时，发现甲壳素丙酸酯涂层将纸的拉伸强度从64 MPa提高到84 MPa，并且其还显著降低表面能以提高耐水性。这些结果表明，在乙醇/水二元溶剂中溶解的甲壳素丙酸酯在实际应用中具有新型可持续生物基薄膜和涂料的潜在用途。
The use of less-toxic solvents is highly desirable for biopolymer processing and applications to meet sustainability while alleviating environmental burdens. In this study, chitin was propionylated to improve its solubility. The highly propionylated chitin exhibited considerably improved solubility (up to 96%) in a binary ethanol/water solution as compared to almost insolubility in a single solvent (either ethanol or water). Transparent films were prepared with acidified solutions and possessed excellent mechanical properties with a tensile strength up to 40 MPa and Young’s modulus of 1.3 GPa. When the solution of the chitin propionate solution was employed as a coating on a paper substrate, the chitin propionate coating was found to improve the tensile strength of the paper from 64 MPa up to 84 MPa, and it also significantly decreased the surface energy to improve water resistance. These results suggest that chitin propionate that is dissoluble in ethanol/water binary solvents has potential use for new sustainable bio-based films and coatings in practical applications.