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A Biobased Blend of Cellulose Diacetate with Starch

机译：双乙酸纤维素与淀粉的生物基混合物

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摘要

Two bio-based polymers, cellulose diacetate (CDA) and starch, were used to prepare blends with reasonable properties and low cost. Due to the poor processing properties, starch was modified in the presence of glycerol and epoxidized soybean oil (ESO), and CDA was plasti-cized by triacetin (TA) and ESO, respectively. The morphologies of the blends with different amounts of modified starch (MST) were studied by scanning electron microscope (SEM), and the physical properties of the blends, including thermal stability, mechanical property, water and moisture resistance, were investigated. The equilibrium moisture absorption rates of the blends containing 30 and 50 wt% MST at 100 % of relative humidity(RH) were 9.4 and 15.0 %, respectively. SEM and DMA results demonstrated that CDA and MST had a certain extent of compatibility. Due to the partial plasticization of starch, the tensile strength of the blends was nearly not affected by the amount of MST. Even if 50 wt% MST was added, the tensile strength of the blend was as high as 24.7 MPa. The obtained blend containing 30 wt% MST can keep good mechanical properties at 50 % RH, and its tensile strength and elongation at break are 30.2 MPa and 3.6 %, respectively. All the results show that the CDA/MST blends have a potential as an environmental friendly material.
机译：使用两种生物基聚合物，即双乙酸纤维素（CDA）和淀粉制备具有合理性能和低成本的共混物。由于较差的加工性能，淀粉在甘油和环氧化大豆油（ESO）的存在下进行了改性，而CDA分别通过三醋精（TA）和ESO进行了增塑。通过扫描电子显微镜（SEM）研究了不同量改性淀粉（MST）共混物的形貌，研究了共混物的物理性能，包括热稳定性，机械性能，耐水性和耐湿性。相对湿度（RH）为100％时，包含30和50 wt％MST的共混物的平衡吸湿率分别为9.4和15.0％。 SEM和DMA结果表明CDA和MST具有一定程度的兼容性。由于淀粉的部分增塑，共混物的拉伸强度几乎不受MST量的影响。即使添加50重量％的MST，该共混物的拉伸强度也高达24.7MPa。所获得的含有30wt％MST的共混物在50％RH下可以保持良好的机械性能，并且其拉伸强度和断裂伸长率分别为30.2MPa和3.6％。所有结果表明，CDA / MST共混物具有作为环保材料的潜力。

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  • 来源
    《Journal of Polymers and the Environment》 |2012年第4期|1103-1111|共9页
  • 作者

    Fei-Xiang Xia; Xiu-Li Wang; Fei Song; Yu-Zhong Wang;

  • 作者单位

    National Engineering Laboratory of Eco-Friendly Polymeric Materials (Sichuan), State Key Laboratory of Polymer Materials Engineering, Center for Degradable and Flame-Retardant Polymeric Materials, College of Chemistry, Sichuan University, Chengdu 610064, China;

    National Engineering Laboratory of Eco-Friendly Polymeric Materials (Sichuan), State Key Laboratory of Polymer Materials Engineering, Center for Degradable and Flame-Retardant Polymeric Materials, College of Chemistry, Sichuan University, Chengdu 610064, China;

    National Engineering Laboratory of Eco-Friendly Polymeric Materials (Sichuan), State Key Laboratory of Polymer Materials Engineering, Center for Degradable and Flame-Retardant Polymeric Materials, College of Chemistry, Sichuan University, Chengdu 610064, China;

    National Engineering Laboratory of Eco-Friendly Polymeric Materials (Sichuan), State Key Laboratory of Polymer Materials Engineering, Center for Degradable and Flame-Retardant Polymeric Materials, College of Chemistry, Sichuan University, Chengdu 610064, China;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    cellulose acetate; starch; blend; mechanical property;

    机译：醋酸纤维素淀粉;混合;机械性能;

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