摘要
通过简易、绿色环保的方法,将纤维素用NaOH/尿素体系进行溶解、再生、冷冻干燥获得再生纤维素(RC)多孔材料,再浸渍聚乳酸(PLA)获得多孔RC/PLA复合材料。该复合材料具有与多孔RC材料相同的开孔结构,超轻,高孔隙率等特性。随PLA的引入,多孔复合材料的三维纤维网络结构向密实片层结构转变,缺陷结构逐渐完善,其压缩强度大幅度提高。RC/PLA的压缩强度和模量相比于RC分别提高了369.8%和633.6%。
The porous regenerated cellulose （RC） materials were fabricated via simple and environmentally friendly NaOH/urea/H20 solvent to dissolve cellulose followed by regeneration and freeze-dry. And the porous regenerated eellulose/poly（lactic acid） （RC/PLA） composites were obtained by immersing porous RC materials in impregnation solution of PLA. Similar to porous RC materials, porous RC/PLA composites have the same properties with open porous structure, ultra-light and high porosity. And the compressive strength and elastic modulus of porous RC/PLA composites are 369.8 % and 633.6 % higher than those of porous RC materials, respectively, due to the morphology of porous structure transition from 3D fibrillar network to close-grained sheet network and the defective porous structure is repaired with the PLA loading.
出处
《高分子材料科学与工程》
EI
CAS
CSCD
北大核心
2017年第4期143-147,共5页
Polymer Materials Science & Engineering
基金
国家自然科学基金资助项目(51273131
51473101)
关键词
多孔材料
再生纤维素
聚乳酸
压缩力学性能
porous materials
regenerated cellulose
poly（lactic acid）
compression mechanical properties
