含疏水液体的甘油增塑面筋生物塑料的拉伸强度提高

Improved tensile strength of glycerol-plasticized gluten bioplastic containing hydrophobic liquids.

作者信息

Song Yihu, Zheng Qiang

机构信息

Department of Polymer Science and Engineering, Zhejiang University, Zheda Road No. 38, Hangzhou, Zhejiang 310027, China.

出版信息

Bioresour Technol. 2008 Nov;99(16):7665-71. doi: 10.1016/j.biortech.2008.01.075. Epub 2008 Mar 11.

DOI:10.1016/j.biortech.2008.01.075

PMID:18337091

Abstract

The aim of the present work has been to study the influence of hydrophobic liquids on the morphology and the properties of thermo-molded plastics based on glycerol-plasticized wheat gluten (WG). While the total amount of castor oil and glycerol was remained constant at 30 wt%, castor oil with various proportions with respect to glycerol was incorporated with WG by mixing at room temperature and the resultant mixtures were thermo-molded at 120 degrees C to prepare sheet samples. Moisture absorption, morphology, dynamic mechanical properties, and tensile properties (Young's modulus, tensile strength and elongation at break) of the plastics were evaluated. Experimental results showed that the physical properties of WG plastic were closely related to glycerol to castor oil ratio. Increasing in castor oil content reduces the moisture absorption markedly, which is accompanied with a significant improvement in tensile strength and Young's modulus. These observations were further confirmed in 24 wt% glycerol-plasticized WG plastics containing 6 wt% silicone oil or polydimethylsiloxane (PDMS) liquid rubber.

摘要

本研究的目的是研究疏水性液体对基于甘油增塑小麦面筋（WG）的热成型塑料的形态和性能的影响。在蓖麻油和甘油的总量保持在30 wt%不变的情况下，将相对于甘油具有不同比例的蓖麻油与WG在室温下混合，并将所得混合物在120℃下热成型以制备片状样品。对塑料的吸湿性能、形态、动态力学性能和拉伸性能（杨氏模量、拉伸强度和断裂伸长率）进行了评估。实验结果表明，WG塑料的物理性能与甘油与蓖麻油的比例密切相关。蓖麻油含量的增加显著降低了吸湿率，同时伴随着拉伸强度和杨氏模量的显著提高。在含有6 wt%硅油或聚二甲基硅氧烷（PDMS）液态橡胶的24 wt%甘油增塑WG塑料中，这些观察结果得到了进一步证实。