Synthesis of Lignin Nanofibers with Ionic-Responsive Shells: Water-Expandable Lignin-Based Nanofibrous Mats

被引：61

作者：

Gao, Guangzheng ^{[1
]}

Dallmeyer, James Ian ^{[1
]}

Kadla, John F. ^{[1
]}

机构：

[1] Univ British Columbia, Adv Biomat Chem Lab, Fac Forestry, Vancouver, BC V6T 1Z4, Canada

来源：

BIOMACROMOLECULES | 2012年 / 13卷 / 11期

基金：

加拿大自然科学与工程研究理事会;

关键词：

MULTIWALLED CARBON NANOTUBES; PHASE-TRANSITIONS; POLYMER BRUSHES; FIBERS; POLY(N-ISOPROPYLACRYLAMIDE); SURFACES; PROTEIN; NANOHYBRIDS; COPOLYMERS; BEHAVIOR;

D O I：

10.1021/bm301039f

中图分类号：

Q5 [生物化学]; Q7 [分子生物学];

学科分类号：

071010 ; 081704 ;

摘要：

A series of ionic responsive poly(N-isopropylacrylamide) (PNIPAM) surface modified lignin nanofiber mats were prepared by aqueous surface initiated atom transfer radical polymerization (SI-ATRP). PNIPAM brushes with various molecular weights, thickness, and grafting densities were immobilized on electrospun lignin nanofiber mats by adjusting initial, monomer concentration and surface initiator density. ATR-FTIR, SEM, TGA, XPS, and water contact angle measurements confirmed successful surface modification. Analysis of the PNIPAM-modified lignin nanofiber mats (Lig-PN) found that the lower critical solution temperature (LCST) was similar to that of PNIPAM and demonstrated ionic responsive characteristics With increasing ionic concentration, the water contact angles of the Lig-PN increased correspondingly. AFM images showed that the PNIPAM on the lignin nanofiber mat surface expanded and contracted on 0.5 M Na2SO4.

引用

页码：3602 / 3610

页数：9

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