Toughness enhancement of cellulose nanocomposites by alkali treatment of the reinforcing cellulose nanofibers

被引：89

作者：

Nakagaito, Antonio Norio ^{[1
]}

Yano, Hiroyuki ^{[1
]}

机构：

[1] Kyoto Univ, Res Inst Sustainable Humanosphere, Kyoto 6110011, Japan

来源：

CELLULOSE | 2008年 / 15卷 / 02期

基金：

日本学术振兴会;

关键词：

alkali treatment; cellulose nanofibers; microfibrillated cellulose; nanocomposites; phenol-formaldehyde; sodium hydroxide; toughness; work of fracture;

D O I：

10.1007/s10570-007-9168-2

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：

Nanocomposites were produced with NaOH aqueous solution-treated microfibrillated cellulose (MFC) and phenolic resin, and the mechanical properties were compared with their microcomposite counterparts based on pulp fiber. Tensile tests showed that strong alkali-treated MFC nanocomposites with resin content around 20 wt.% achieved strain at fracture values two times higher than those of untreated MFC nanocomposites and five times higher than those of untreated pulp microcomposites. The improvement in work of fracture of alkali-treated MFC nanocomposites was attributed to the ductility of the nanofibers caused by transformations in the amorphous regions along the cellulose microfibrils.

引用

页码：323 / 331

页数：9

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