Preparation of PVA@PEI@BAC@CNC composite nanofibrous film with high efficiency filtration for PM2.5  

作　　者：Jingda Huang Yi Wang Yuxin Cai Yipeng Liang Shite Lin Enfu Wang Jinhuan Zhong Wenbiao Zhang Kuichuan Sheng 

机构地区：[1]College of Biosystems Engineering and Food Science,Zhejiang University,Hangzhou 310058,China [2]College of Chemistry and Materials Engineering,Zhejiang A&F University,Hangzhou 311300,China

出　　处：《Frontiers of Materials Science》2023年第4期171-182,共12页材料学前沿（英文版）

基　　金：the China Postdoctoral Science Foundation(No.2021M692806);the Natural Science Foundation of Zhejiang Province(No.LY21C160002);the Scientific Research Development Foundation of Zhejiang A&F University(No.2018FR054).

摘　　要：It is still a challenge to prepare a water-and polymer-based electrospun air filter film with high efficiency filtration,low pressure drop,and good mechanical properties.To address this issue,polyvinyl alcohol(PVA)was employed as the main material,mixing polyethyleneimine(PEI),bamboo-based activated carbon(BAC)and cellulose nanocrystal(CNC)to construct the air filter film by electrostatic electrospinning.In this system,the negatively charged BAC and CNC are fixed in the system through bonding with the positively charged PEI,showing a double adsorption effect.One is the mechanical filtration of the porous network structure constructed by PVA@PEI electrospun nanofibers,and the other is the electrostatic adsorption of PM2.5 on the surface of BAC and CNC.It is significant that the resulting composite air filter displays a high filtration efficiency of 95.86%,a pressure drop of only 59 Pa,and good thermal stability.Moreover,the introduced methyltrimethoxysilane(MTMS)endows it with good water-resistance.Given these excellent performances,this system can provide theoretical and technical references for the development of water-and polymerbased electrospun air filter film.

关 键 词：polyvinyl alcohol POLYETHYLENEIMINE bamboo-based activated carbon cellulose nanocrystals electrospun nanofibrous film PM2.5 

分 类 号：TB383[一般工业技术—材料科学与工程]