Mechanics and oil absorption properties of PVA/CNF aerogel
The cellulose nanofiber(CNF)aerogel has poor mechanical stability and weak oil-water separation ability,which limits its application in the field of oil absorption.It is proposed to modify CNF aerogel with crosslinker polyvinyl alcohol(PVA)and modifier methyltrimethoxysilane(MTMS),and two modification methods,namely solution method and chemical vapor deposition(CVD),are attempted.It is found that the oil absorption ratio of hydrophobic aerogels made by solution modification method is very low,while that of aerogels made by vapor deposition method is 40～60 g/g,even when subjected to 35 kPa external force,the elastic recovery rate could reach 95％.
NETL
NSTL
万方数据
