Strong Surface Treatment Effects on Reinforcement Efficiency in Biocomposites Based on Cellulose Nanocrystals in Poly(vinyl acetate) Matrix

被引：49

作者：

Ansari, Farhan ^{[1
]}

Salajkova, Michaela ^{[1
,2
]}

Zhou, Qi ^{[2
,3
]}

Berglund, Lars A. ^{[1
,2
]}

机构：

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

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

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

来源：

BIOMACROMOLECULES | 2015年 / 16卷 / 12期

关键词：

NANOCOMPOSITE MATERIALS; POLYMER NANOCOMPOSITES; POLYVINYL ACETATE); POLY(LACTIC ACID); NANOFIBER NETWORK; WHISKERS; SUSPENSIONS; NANOWHISKERS; TRANSITION; ADSORPTION;

D O I：

10.1021/acs.biomac.5b01245

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：

In this work, the problem to disperse cellulose nanocrystals (CNC) in hydrophobic polymer matrices has been addressed through application of an environmentally friendly chemical modification approach inspired by clay chemistry. The objective is to compare the effects of unmodified CNC and modified CNC (modCNC) reinforcement, where degree of CNC dispersion is of interest. Hydrophobic functionalization made it possible to disperse wood-based modCNC in organic solvent and cast well-dispersed nanocomposite films of poly(vinyl acetate) (PVAc) with 1-20 wt % CNC. Composite films were studied by infrared spectroscopy (FT-IR), UV-vis spectroscopy, dynamic mechanical thermal analysis (DMTA), tensile testing, and field-emission scanning electron microscopy (FE-SEM). Strongly increased mechanical properties were observed for modCNC nanocomposites. The reinforcement efficiency was much lower in unmodified CNC composites, and specific mechanisms causing the differences are discussed.

引用

页码：3916 / 3924

页数：9

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