Wu Chao, Li Jun, Zhang Yu-Qing, Li Xin, Wang Shu-Ya, Li De-Qiang
Xinjiang Key Laboratory of Agricultural Chemistry and Biomaterials, College of Chemistry and Chemical Engineering, Xinjiang Agricultural University, Urumchi, 830052, Xinjiang, People's Republic of China.
Beijing Key Laboratory of Lignocellulosic Chemistry, Beijing Forestry University, Beijing, 100083, People's Republic of China.
ChemSusChem. 2023 Nov 8;16(21):e202300518. doi: 10.1002/cssc.202300518. Epub 2023 Aug 24.
The cellulose-based hydrogel has occupied a pivotal position in almost all walks of life. However, the native cellulose can not be directly used for preparing hydrogel due to the complex non-covalent interactions. Some literature has discussed the dissolution and modification of cellulose but has yet to address the influence of the pretreatment on the as-prepared hydrogels. Firstly, the "touching" of cellulose by derived and non-derived solvents was introduced, namely, the dissolution of cellulose. Secondly, the "conversion" of functional groups on the cellulose surface by special routes, which is the modification of cellulose. The above-mentioned two parts were intended to explain the changes in physicochemical properties of cellulose by these routes and their influences on the subsequent hydrogel preparation. Finally, the "reinforcement" of cellulose-based hydrogels by physical and chemical techniques was summarized, viz., improving the mechanical properties of cellulose-based hydrogels and the changes in the multi-level structure of the interior of cellulose-based hydrogels.
基于纤维素的水凝胶在几乎所有生活领域都占据着关键地位。然而，由于复杂的非共价相互作用，天然纤维素不能直接用于制备水凝胶。一些文献讨论了纤维素的溶解和改性，但尚未涉及预处理对所制备水凝胶的影响。首先，介绍了衍生和非衍生溶剂对纤维素的“接触”，即纤维素的溶解。其次，通过特殊途径对纤维素表面官能团进行“转化”，这是纤维素的改性。上述两部分旨在解释通过这些途径纤维素物理化学性质的变化及其对后续水凝胶制备的影响。最后，总结了通过物理和化学技术对基于纤维素的水凝胶进行“增强”，即改善基于纤维素的水凝胶的机械性能以及基于纤维素的水凝胶内部多级结构的变化。
