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Simulation of beta-dextranase from raw natural rubber to investigate structure and properties of natural rubber/halloysite composites

文献类型： 外文期刊

作者： Xu, Tiwen 1 ; Xin, Yuanni 1 ; Wang, Yueqiong 2 ; Liao, Lusheng 2 ; Li, Haifeng 1 ; Ban, Jianfeng 1 ; Yang, Ying 1 ;

作者机构： 1.Guangdong Univ Petrochem Technol, Mat Sci & Engn Inst, Maoming 525000, Guangdong, Peoples R China

2.Chinese Acad Trop Agr Sci, Agr Prod Proc Res Inst, Guangdong Prov Key Lab Nat Rubber Proc Agr Prod P, Zhanjiang 524001, Guangdong, Peoples R China

关键词： interfaces; mechanical properties; rubber; structure-property relations

期刊名称：POLYMER COMPOSITES （ 影响因子：3.171； 五年影响因子：2.877 ）

ISSN： 0272-8397

年卷期：

页码：

收录情况： SCI

摘要： The effects of crude beta-dextranase in raw natural rubber (NR) on the structure and properties of NR/halloysite nanotube (HNT) composites are investigated by introducing external biological beta-dextranase. Results of curing tests as well as mechanical and dynamic mechanical analyses show that the curing time of the composite increases with beta-dextranase concentration and then plateaus at 6 wt%, at which the maximum values of the elastic modulus, tensile strength, and crosslink density are achieved and the lowest hysteresis loss factor at 0-80 degrees C is observed. Morphological investigations show that the addition of beta-dextranase improves the dispersion of HNTs and enhances interfacial adhesion in the composites owing to hydrogen bonds between beta-dextranase and HNTs, as revealed by Fourier-transform infrared spectroscopy, X-ray diffraction, and X-ray photoelectron spectroscopy analyses. We envision the use of beta-dextranase in NR as a novel interfacial modifier in NR composites.

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