化工学报2025，Vol.76Issue(5)：2169-2185,17.DOI:10.11949/0438-1157.20240985
聚酰亚胺增强木质纤维素纳米纤丝气凝胶制备及其油水分离性能研究
Preparation of polyimide-reinforced lignocellulosic nanofibril aerogel and its oil-water separation performance
摘要
Abstract
Lignocellulosic nanofibril(LCNF)aerogels have the advantages of high porosity,low density,renewable and reusable raw materials,but their insufficient mechanical properties limit their application in the field of oil-water separation.To address this issue,LCNF/polyimide(PI)composite aerogels were created using freeze-drying and chemical vapor deposition.The results show that the strong hydrogen bond between PI and LCNF endowed aerogels with good mechanical and oil-water separation performance,with elasticity modulus ranging from 9.69 to 11.88 kPa and oil-absorption multiplicity ranging from 73.0 to 103.4 g·g-1.Compared with M-LCNF aerogels,the elastic modulus of M-LCNF/PI aerogels increased by 1.459-2.015 times,and the adsorption capacity for a variety of organic solvents and oils increased by 1.6-21.0 g∙g-1.M-LCNF/PI-1.00 aerogels maintained low density(8.66 g∙cm-3),excellent hydrophobicity(water contact angle of 140.6°),good thermal stability(maximum decomposition rate temperature up to 363.1℃)and excellent thermal insulation performance of 0.04436 W∙m-1∙K-1.The adsorption of vacuum pump oil by M-LCNF/PI-1.00 was more consistent with a quasi-secondary kinetic model.The M-LCNF/PI-1.00 still retained 79.1％of the original adsorption capacity after 5 times of extrusion adsorption of anhydrous ethanol,showing good reusability and providing a new strategy for preparing high-performance oil-absorbing materials.关键词
木质纤维素纳米纤丝/聚酰亚胺/气凝胶/分离/隔热/动力学模型/循环利用Key words
lignocellulosic nanofibril/polyimide/aerogel/separation/heat insulation/kinetic modeling/recycling分类
化学化工引用本文复制引用
李家顺,李旺,秦祖赠,苏通明,谢新玲,纪红兵..聚酰亚胺增强木质纤维素纳米纤丝气凝胶制备及其油水分离性能研究[J].化工学报,2025,76(5):2169-2185,17.基金项目
国家自然科学基金项目(22168011) （22168011）
广西重点研发计划项目(2023AB38126) （2023AB38126）
广西石油化工资源加工与过程强化技术重点实验室主任基金项目(2023Z008) （2023Z008）
广西八桂学者资助项目 （）
