高强高模微纤化纤维素膜的制备  

Preparation of Microfibrillated Cellulose withExcellent Strength and Modulus

作　　者：何超[1] 邓莎 周密[2] HE Chao;DENG Sha;ZHOU Mi(College of Polymer Science and Engineering,Sichuan University,Chengdu 610065,China;College of Biomass and Engineering,Sichuan University,Chengdu 610065,China)

机构地区：[1]四川大学高分子科学与工程学院,成都610065 [2]四川大学轻工科学与工程学院,成都610065

出　　处：《实验室研究与探索》2020年第6期16-18,26,共4页Research and Exploration In Laboratory

基　　金：国家自然科学基金项目(51903178,51803134)。

摘　　要：提出了一种简单的纤维素改性方法(多巴胺改性),并加入交联剂(聚醚酰亚胺)进行交联,得到了高强度、高模量的微纤化纤维素膜。改变多巴胺聚合时间、多巴胺浓度以及交联剂的用量,探索纤维素膜力学性能的变化。结果表明,多巴胺聚合72 h,多巴胺浓度为1 mg/mL以及聚醚酰亚胺加入量为30%时,得到的微纤化纤维素膜力学性能较优异。该方法反应条件温和、环保且容易实现,既为微纤化纤维素的化学改性提供了思路,也为制备高性能纤维素复合材料奠定了基础。Due to the shortage of fossil resource,there is a growing interest in developing biodegradable materials from natural resources in a wide range of applications. Cellulose has drawn great attention as a renewable resource generated from plants or organic creatures. Thus,it is urgent to prepare high-performance cellulose films. By introducing a simple modification of cellulose (dopamine modification), following by crosslinking by adding crosslinking agent,microfibrillated cellulose films with high strength and modulus were obtained. And the effect of dopamine polymerization time,dopamine concentration and dose of crosslinking agent on the mechanical property of cellulose films were investigated. The results show that high-performance cellulose films can be obtained when dopamine polymerization time is 72 h,dopamine concentration is 1 mg/m L and the dose of crosslinking agent is 30%. This method is mild,environmental-friendly and available,which provides an idea for chemical modification of microfibrillated cellulose and lays a foundation for preparation of high performance cellulose-based composites.

关 键 词：多巴胺 微纤化纤维素 力学性能 

分 类 号：TQ352-45[化学工程]