熔融处理的玉米蛋白/PVAl共混物的力学、吸水性能和形貌

IF 1 4区化学 Q4 POLYMER SCIENCE

Polimeros-ciencia E Tecnologia Pub Date : 2021-04-23 DOI:10.1590/0104-1428.10619

Sandro Junior Vessoni Torres, G. B. Medeiros, F. Rosário, F. Yamashita, L. Mattoso, E. Corradini

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引用次数: 2

摘要

摘要:将玉米蛋白和聚乙烯醇(PVAl)的混合物在内部混合器(150℃，50 rpm)中处理5-8分钟。用甘油和油酸作为增塑剂。然后对得到的混合物进行压缩成型，并通过傅里叶变换红外光谱(FTIR)、吸水实验、力学测试和扫描电子显微镜(SEM)进一步表征。FTIR分析表明玉米蛋白与PVAl之间存在氢键相互作用。拉伸试验表明，PVAl的加入提高了共混物的柔韧性。拉伸强度为1.7 ~ 5.7 MPa，断裂伸长率为2.7 ~ 32%，杨氏模量为433 ~ 7371 MPa。平衡吸水率随玉米蛋白含量的增加而降低，有利于玉米蛋白/PVAl的脆性行为。在所研究的组合物中，共混物是不混溶的，并且空洞的存在表明聚合物之间的界面相互作用很差。

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Mechanical and water absorption properties and morphology of melt processed Zein/PVAl blends

Abstract Blends of zein and poly(vinyl alcohol) (PVAl) were processed in an internal mixer (150oC, 50 rpm) for 5-8 minutes. Glycerol and oleic acid were used as plasticizers. The mixtures obtained were then compression molded and further characterized by Fourier transform infrared spectroscopy (FTIR), water-absorption experiments, mechanical tests, and scanning electron microscopy (SEM). FTIR analysis indicated the existence of hydrogen bonding interactions between zein and PVAl. Tensile tests showed that the addition of PVAl increased the flexibility of the blends. The tensile strength ranged from 1.7 to 5.7 MPa, elongation at break ranged from 2.7 to 32% and Young’s modulus ranged from 433 to 7371 MPa. Water absorption at equilibrium decreased with increasing zein content, which favored a brittle behavior in the zein/PVAl. The blends were immiscible in the composition studied and the presence of voids indicated poor interfacial interaction between the polymers.

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来源期刊

Polimeros-ciencia E Tecnologia 化学-高分子科学

CiteScore

2.00

自引率

0.00%

发文量

审稿时长

6 months

期刊介绍： Polímeros is a quarterly publication of the Associação Brasileira de Polímeros - ABPol (Brazilian Polymer Association), which publishes Review Articles, Original Articles and Short Communications, disclosing advances in the knowledge of Polymer Science and Technology.