Functionalized cellulose nanocrystals as biobased nucleation agents in poly(L-lactide) (PLLA) - Crystallization and mechanical property effects

被引：416

作者：

Pei, Aihua ^{[2
]}

Zhou, Qi ^{[1
,2
]}

Berglund, Lars A. ^{[2
,3
]}

机构：

[1] Royal Inst Technol, AlbaNova Univ Ctr, Sch Biotechnol, SE-10691 Stockholm, Sweden

[2] Royal Inst Technol, Dept Fiber & Polymer Technol, SE-10044 Stockholm, Sweden

[3] Royal Inst Technol, Wallenberg Wood Sci Ctr, SE-10044 Stockholm, Sweden

来源：

COMPOSITES SCIENCE AND TECHNOLOGY | 2010年 / 70卷 / 05期

关键词：

Cellulose nanocrystals; Nano composites; Particle-reinforced composites; Casting; Mechanical properties; POLYLACTIC ACID; MICROCRYSTALLINE CELLULOSE; POLYPROPYLENE COMPOSITES; POLY(LACTIC ACID); MORPHOLOGY; NANOCOMPOSITES; BEHAVIOR; CRYSTALLINITY; STEREOCOMPLEX; SUSPENSIONS;

D O I：

10.1016/j.compscitech.2010.01.018

中图分类号：

TB33 [复合材料];

学科分类号：

摘要：

The important industrial problem of slow crystallization of poly(L-lactide)(PLLA) is addressed by the use of cellulose nanocrystals as biobased nucleation reagents. Cellulose nanocrystals (CNC) were prepared by acid hydrolysis of cotton and additionally functionalized by partial silylation through reactions with n-dodecyldimethylchlorosilane in toluene Such silylated cellulose nanocrystals (SCNC) were dispersible in tetrahydrofuran and chloroform, and formed stable suspensions Nanocomposite films of PLLA and CNC or SCNC were prepared by solution casting The effects of surface silylation of cellulose nanocrystals on morphology, non-isothermal and isothermal crystallization behavior, and mechanical properties of these truly nanostructured composites were investigated The unmodified CNC formed aggregates in the composites, whereas the SCNC were well-dispersed and individualized in PLLA As a result, the tensile modulus and tensile strength of the PLLA/SCNC nanocomposite films were more than 20% higher than for pure PLLA with only 1 wt% SCNC, due to crystallinity effects and fine dispersion (C) 2010 Elsevier Ltd. All rights reserved

引用

页码：815 / 821

页数：7

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