Cellulose ( IF 4.9 ) Pub Date : 2021-09-03 , DOI: 10.1007/s10570-021-04170-5 Chuanjie Jiang 1 , Wenting Fan 1 , Nan Zhang 1 , Guangqi Zhao 1 , Wenxiang Wang 1 , Liangjiu Bai 1 , Hou Chen 1 , Huawei Yang 1
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In this manuscript, self-healing nanocomposite hydrogels were successfully fabricated with nanocomposite materials based on functional cellulose nanocrystals (CNCs). CNCs were firstly extracted from microcrystalline cellulose by a typical and eco-friendly method with choline chloride and oxalic acid dihydrate as deep eutectic solvents. Well-defined poly(glycidyl methacrylate) (PGMA) was further grafted on the surface of CNCs by surface-initiated activator generated by electron transfer atom transfer radical polymerization. After ring-opening reaction of PGMA, CNCs@PGMA-OL nanocomposites with diol functional group were successfully obtained and further implanted into poly(acrylic acid)/guar gum-based self-healing hydrogels by multiple reversible weak interactions. These nanocomposite hydrogels display outstanding self-healing and mechanical strength properties, providing a facile strategy for the design and development CNC-based functional materials.
Graphic abstract
中文翻译：
通过甲基丙烯酸缩水甘油酯的 SI-AGET ATRP 和开环反应对纤维素纳米晶体进行表面工程，以制备自修复纳米复合水凝胶
在这份手稿中，基于功能性纤维素纳米晶体 (CNC) 的纳米复合材料成功制造了自修复纳米复合水凝胶。CNCs首先以氯化胆碱和草酸二水合物为低共熔溶剂，采用典型的环保方法从微晶纤维素中提取。通过电子转移原子转移自由基聚合产生的表面引发活化剂，明确定义的聚（甲基丙烯酸缩水甘油酯）（PGMA）进一步接枝在 CNCs 表面。PGMA开环反应后，成功获得了具有二醇官能团的CNCs@PGMA-OL纳米复合材料，并通过多重可逆弱相互作用进一步植入聚丙烯酸/瓜尔胶基自修复水凝胶中。
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