Structure and thermal properties of poly(lactic acid)/cellulose whiskers nanocomposite materials

被引：427

作者：

Petersson, L.

Kvien, I.

Oksman, K. ^{[1
]}

机构：

[1] Lulea Univ Technol, Dept Mfg & Design Wood & Bionanocomposites, Div Mfg & Design Wood & Bionanocomposites, S-93187 Skelleftea, Sweden

[2] Norwegian Univ Sci & Technol, Dept Engn Design & Mat, N-7034 Trondheim, Norway

来源：

COMPOSITES SCIENCE AND TECHNOLOGY | 2007年 / 67卷 / 11-12期

关键词：

solution casting; D. scanning/transmission electron microscopy; B. thermal properties; B. thermomechanical properties; MICROCRYSTALLINE CELLULOSE; MECHANICAL-PROPERTIES; MICROFIBRILS; SUSPENSIONS;

D O I：

10.1016/j.compscitech.2006.12.012

中图分类号：

TB33 [复合材料];

学科分类号：

摘要：

The goal of this work was to produce nanocomposites based on poly(lactic acid) (PLA) and cellulose nanowhiskers (CNW). The CNW were treated with either tert-butanol or a surfactant in order to find a system that would show flow birefringence in chloroform. The nanocomposites were prepared by incorporating 5 wt% of the different CNW into a PLA matrix using solution casting. Field emission scanning electron rnicroscopy showed that untreated whiskers formed flakes, while tert-butanol treated whiskers formed loose networks during freeze drying. The surfactant treated whiskers showed flow birefringence in chloroform and transmission electron microscopy showed that these whiskers produced a well dispersed nanocomposite. Thermogravimetric analysis indicated that both whiskers and composite materials were thermally stable in the region between 25 degrees C and 220 degrees C. The dynamic mechanical thermal analysis showed that both the untreated and the tert-butanol treated whiskers were able to improve the storage modulus of PLA at higher temperatures and a 20 degrees C shift in the tan delta peak was recorded for the tert-butanol treated Whiskers. (c) 2007 Elsevier Ltd. All rights reserved.

引用

页码：2535 / 2544

页数：10

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