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Research on rheological behavior of biobased composite slurry composed of sisal fiber-绿色产品及装备-2017-李方义

作者: 张传伟   信息来源:    发布时间: 2017-12-09

Chuan-Wei Zhang, Fang-Yi Li, Jian-Feng Li, Jie Xu, Qi Xie, Shuai Chen, and An-Fu Guo

Key Laboratory of High Efficiency and Clean Mechanical Manufacture, Ministry of Education School of Mechanical Engineering, Shandong University
Journal:《Biobased Materials and Bioenergy》

A B S T R A C T

In this work, a biobased composite was prepared via foam molding. The prepared composite con-
tained plant fibers as main raw materials, thermoplastic oxidized starch (TPOS) as binder, and
several additives as active agents. A novel modified method for starch, combination of oxidization
and plasticization, was developed and applied in the preparation of biobased composites. Rhe-
ological property is the main physical quality of interest in the industrial production of biobased
composites. The influence of starch modification on the rheological properties of the biobased com-
posite slurry was analyzed using digital rotational viscometer. Results showed that modification
of starch decreased the viscosity of the composite slurry significantly. Moreover, inherent reasons
of the change was analyzed. X-ray diffraction revealed that crystalline structures were completely
destroyed in TPOS. Infrared spectrum analysis showed that sisal fibers formed hydrogen bonds
with TPOS. The starch became compatible with plant fibers, thus decreasing the viscosity of the
slurry. Furthermore, the effect of different plasticizer mass ratios on the rheological behavior of the
slurry was investigated to determine the optimal plasticizer/oxidizer mass ratio for industrial manu-
facturing. A 10/0.68/1.36 mass ratio of starch/oxidizer/plasticizer had the best effect on the viscosity
of the composite slurry.
Keywords: Biobased Composites, Thermoplastic Oxidized Starch, Sisal Fiber, Rheological
Behavior, Hydrogen Bond.

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