Toward high-performance fibrillated cellulose-based air filter via constructing spider-web-like structure with the aid of TBA during freeze-drying process

被引：41

作者：

Lu, Zhaoqing ^{[1
]}

Su, Zhiping ^{[1
]}

Song, Shunxi ^{[1
]}

Zhao, Yongsheng ^{[1
]}

Ma, Shanshan ^{[1
]}

Zhang, Meiyun ^{[1
]}

机构：

[1] Shaanxi Univ Sci & Technol, Coll Bioresources Chem & Mat Engn, Shaanxi Prov Key Lab Papermaking Technol & Specia, Key Lab Paper Based Funct Mat China Natl Light In, Xian 710021, Shaanxi, Peoples R China

来源：

CELLULOSE | 2018年 / 25卷 / 01期

基金：

美国国家科学基金会;

关键词：

Fibrillated cellulose fibers; Tert-butyl alcohol; Spider-web-like structure; Freeze-drying; Air filter; WATER-PURIFICATION; FIBER NETWORK; FILTRATION; PARTICLES; FABRICATION; MEMBRANE; MATS; NANOFIBER/NETS; EFFICIENT; BUTANOL;

D O I：

10.1007/s10570-017-1561-x

中图分类号：

TB3 [工程材料学]; TS [轻工业、手工业、生活服务业];

学科分类号：

0805 ; 080502 ; 0822 ;

摘要：

In consideration of the healthcare issues caused by Particulate Matter (PM) pollution, developing high-performance air-filter materials especially aiming at filtering PM2.5 has attracted great attention. In this work, we fabricated a novel air filter with spider-web-like structure based on renewable and biodegradable fibrillated cellulose fibers, and demonstrated an effective strategy for network structure regulation during freeze-drying process. The results showed that the air filter with spider-web-like structure, whose filtration efficiency for model PM particles with the diameter of 300 nm could exceed 99%, was obtained from a fibrillated cellulose fiber/water/Tert-Butyl Alcohol (TBA) mixture by freeze-drying. The role of TBA in the construction of spider-web-like structure was mainly due to the following two aspects: (1) TBA molecules could promote the separation of microfibrils which acted as the cobwebs in spider-web-like structure. (2) The presence of TBA resulted in air filter transformed from lamellar porous architecture into spider-web-like structure by changing the morphologies and growth kinetics of ice-crystals. Herein, this work paves a way to fabricate high-performance air filters based on renewable materials and the pore-formation mechanism can provide a guide for structure regulation in porous materials.

引用

页码：619 / 629

页数：11