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首页> 外文期刊>Journal of Polymers and the Environment >Effects of Polyol-Based Plasticizer Types and Concentration on the Properties of Polyvinyl Alcohol and Casein Blend Films
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Effects of Polyol-Based Plasticizer Types and Concentration on the Properties of Polyvinyl Alcohol and Casein Blend Films

机译：多元醇类增塑剂类型和浓度对聚乙烯醇和酪蛋白共混膜性能的影响

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摘要

This study aimed to examine the structural, mechanical, thermal and barrier properties of the polyvinyl alcohol/casein (PVA/CA) films plasticized with poly(ethylene glycol) (PEG) and sorbitol (SOR). The films were prepared by solution casting technique at different loading levels of plasticizers (10-15-20-25%). The mechanical results indicated that PEG and SOR effectively plasticize the PVA/CA film while SOR efficiency was higher than PEG. The addition of plasticizers decreased the tensile strength while the increased elongation at break value of PVA/CA film. The maximum tensile strength was observed in 10% PEG addition as 37.5 MPa. On the other hand, maximum elongation at break value was observed in 15% SOR at 369% that was higher than the un-plasticized film about 58%. The water contact angle measurements showed that all films were hydrophilic structures (32-75 degrees). Also, the water vapour permeability of the un-plasticized film was measured as 6.4 g m(-1) s(-1) Pa-1 x 10(-11). This value decreased with the addition of PEG (5.5 g m(-1) s(-1) Pa-1 x 10(-11)) while increasing SOR addition (12.2 g m(-1) s(-1) Pa-1 x 10(-11)). The thermal degradation temperature of un-plasticized PVA/CA film was decreased with plasticization. The residual weight of un-plasticized PVA/CA was 12.5 wt. %, which decreased at 4.5 wt. % for PEG-25 and 4.8 wt. % for SOR-20 films. Also, the melting temperature of the films decreased by increasing the content of plasticizers. Melting temperatures of SOR containing films were lower than PEG containing the films. Consequently, un-plasticized and plasticized PVA/CA-based films successfully prepared and analyzed to determine the appropriate plasticizer. All prepared films exhibited acceptable properties for use as food packaging or biobased materials.
机译：该研究旨在检查用聚（乙二醇）（PEG）和山梨糖醇（SOR）塑化的聚乙烯醇/酪蛋白（PVA / CA）膜的结构，机械，热和屏障性质。通过在不同负载率的增塑剂（10-15-20-25％）的溶液浇铸技术中通过溶液铸造技术制备薄膜。机械结果表明，PEG和SOR有效地塑化了PVA / CA膜，同时SOR效率高于PEG。增塑剂的添加降低了拉伸强度，而PVA / Ca膜的断裂值增加的伸长率增加。在10％PEG添加至37.5MPa的10％PEG添加中观察到最大拉伸强度。另一方面，在15％SOR的369％高于未塑化的薄膜的15％SOR中观察到断裂值的最大伸长率高于约58％。水接触角测量表明，所有薄膜都是亲水结构（32-75度）。而且，未塑化的膜的水蒸气渗透率测量为6.4g m（-1）s（-1）pa-1×10（-11）。在增加SOR添加的同时，该值随着PEG（5.5GM（-1）S（-1）PA-1×10（-11））增加（12.2GM（-1）（-1）PA-1 x 10（-11））。用塑化降低了未塑化的PVA / Ca膜的热降解温度。未塑化的PVA / Ca的残余重量为12.5重量％。 ％，下降4.5重量％。 PEG-25和4.8重量％的％。索索尔20薄膜的百分比。而且，通过增加增塑剂的含量，薄膜的熔化温度降低。含甲克的熔融膜的熔化温度低于含有薄膜的PEG。因此，成功制备和分析了未塑化和增塑的PVA / Ca基薄膜以确定合适的增塑剂。所有制备的薄膜都表现出可接受的性能用作食品包装或生物化材料。

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