摘要
纤维素是自然界丰富的天然有机高分子,具有价廉易得、环境友好、力学性能良好等优点,开发和利用空间非常广阔。传统水凝胶存在力学强度差、结构功能单一等问题,而引入纤维素及其衍生物是改善其性能的一种重要手段。因此通过物理或者化学方法对纤维素进行改性,制备具有自愈合性能的凝胶,受到科技工作者的广泛关注和研究。笔者以物理型和化学型自愈合凝胶为主线,综述了近年来采用纤维素制备自愈合材料的研究进展,为纤维素基自愈合凝胶的制备和应用提供参考。以纤维素基凝胶的自愈合机理进行分类,重点介绍了利用氢键、疏水相互作用、主-客体相互作用、金属配位作用和静电作用等物理作用,以及硼酸酯键、双硫键、酰腙键、烯胺键和Diels-Alder反应等化学作用构建的凝胶。分析了自愈合凝胶的设计思路,探讨了凝胶自愈合性能的影响因素,同时总结了基于纤维素制备的自愈合凝胶的结构特性及其在柔性电子、生物医疗、组织工程等方面的应用。最后,探讨了纤维素基自愈合凝胶所面临的问题,并展望了其研究前景。
With the increasing concerns on sustainable utilization of resources and environmental problems,it is necessary to develop self-healing and environmental-friendly materials.The self-healing materials can restore their functionalities and structures after damages,which not only can prolong the service life,but also can decrease the maintenance cost of materials.Inspired by nature,smart self-healing materials have developed to inherently repair internal and external damages under different stimulus.Cellulose,as one of the most abundant natural organic polymers,has been used broadly in various fields due to its low cost,environmentally friendly,and good mechanical properties.Owing to the high intensity of hydroxyl groups along the skeleton of cellulose,cellulose can be converted to functional materials through physical and/or chemical modifications.It is meaningful to incorporate cellulose or cellulose derivatives into traditional hydrogels to efficiently solve their intrinsic problems,including poor mechanical strength and performance.Therefore,self-healing gels prepared by cellulose or cellulose derivatives have attracted extensive attention.The appropriate choice of functional groups attached to cellulose and preparation conditions for the fabrication of high-performance gels can expand application of cellulose-based self-healing gels in the industry,agriculture,biomedicine,soft machine,etc.In this paper,the progress in self-healing cellulose-based gels are reviewed,which is expected to provide useful information for preparation and application of cellulose-based self-healing gels.With the physical mixing or chemical reactions,diverse self-healing cellulose-based gels are designed by introducing desired functional groups onto cellulose chains.Based on their various self-healing mechanisms,the gels fabricated using the dynamic physical interactions including hydrogen bonds,hydrophobic interaction,host-guest interaction,coordination interaction,electronic interaction,and chemical interactions including boronate com
作者
吴慧
李文焰
赵梦婵
卢生昌
黄六莲
陈礼辉
WU Hui;LI Wenyan;ZHAO Mengchan;LU Shengchang;HUANG Liulian;CHEN Lihui(College of Material Engineering,Fujian Agriculture and Forestry University,Fuzhou 350108,China)
出处
《林业工程学报》
CSCD
北大核心
2020年第1期11-17,共7页
Journal of Forestry Engineering
基金
国家自然科学基金(21774021)
闽江学者奖励计划(KXNAD002A)
福建农林大学校国际科技合作与交流项目(KXB16002A)
关键词
纤维素
凝胶
自愈合
机理
结构
cellulose
gel
self-healing
mechanism
structure
