Compatibilization of PLA grafted maleic anhydrate through blending of thermoplastic starch (TPS) and nanoclay nanocomposites for the reduction of gas permeability

IF 4.5 3区材料科学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY

International Journal of Smart and Nano Materials Pub Date : 2022-01-02 DOI:10.1080/19475411.2022.2051639

Niloofar Alikarami, Mahbod Abrisham, Xiayan Huang, Mahyar Panahi-Sarmad, Kanglei Zhang, Ke Dong, Xueliang Xiao

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引用次数: 6

Abstract

ABSTRACT Here, the effects of compatibilization and clay nanoparticles on the gas permeability of nanocomposites of poly-lactic acid (PLA)/thermoplastic starch (TPS)/nanoclay were discussed. TPS and compatibilized PLA/TPS were tailored in the first step. The starch with D-sorbitol as a plasticizer was mingled through the internal mixer. Afterward, the maleination method was utilized on PLA to ameliorate the compatibilization of PLA and TPS. In this regard, maleic anhydrate (MA) has been grafted on PLA in the presence of L101 as a peroxide initiator via melt mixing to obtain PLA-g-MA. The optimum content of PLA-g-MA was about 4 phr, confirmed by DMTA and SEM. Noteworthy, the presence of PLA-g-MA has moderately improved the oxygen barrier. Then, the nanocomposites of PLA and TPS containing 1% of Cloisite-30B as well as the optimum compatibilizer (4phr), were produced by melt mixing in the masterbatch module leading to the formation of an extraordinary well-dispersed structure according to XRD patterns. The mixing order controlled the localization of nanosheets. It was concluded that the inclusion of 1% nanoclay in the PLA phase reduces the oxygen permeability by 55% compared to the pristine blend due to the tortuosity effect of nanosheets that are appropriately dispersed in the matrix. Graphical Abstract

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热塑性淀粉(TPS)与纳米粘土纳米复合材料共混对PLA接枝马来酸酐的增容增容，以降低透气性

摘要本文讨论了增容剂和纳米粘土对聚乳酸(PLA)/热塑性淀粉(TPS)/纳米粘土复合材料透气性的影响。首先对TPS和相容性PLA/TPS进行了定制。以d -山梨醇为增塑剂的淀粉通过内搅拌器混合。然后，利用聚乳酸的马来化方法改善聚乳酸与TPS的相容性。在L101作为过氧化物引发剂的情况下，通过熔融混合将马来酸酐(MA)接枝到PLA上，得到PLA-g-MA。经DMTA和SEM验证，PLA-g-MA的最佳含量为4phr左右。值得注意的是，PLA-g-MA的存在适度改善了氧屏障。然后，在母粒模块中通过熔融混合制备了含有1% Cloisite-30B和最佳增容剂(4phr)的PLA和TPS纳米复合材料，根据XRD模式，形成了非常分散的结构。混合顺序控制着纳米片的定位。结果表明，与原始共混物相比，掺入1%纳米粘土的PLA相的氧渗透率降低了55%，这是由于纳米片在基体中适当分散的扭曲效应。图形抽象

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来源期刊

International Journal of Smart and Nano Materials MATERIALS SCIENCE, MULTIDISCIPLINARY-

CiteScore

6.30

自引率

5.10%

发文量

审稿时长

11 weeks

期刊介绍： The central aim of International Journal of Smart and Nano Materials is to publish original results, critical reviews, technical discussion, and book reviews related to this compelling research field: smart and nano materials, and their applications. The papers published in this journal will provide cutting edge information and instructive research guidance, encouraging more scientists to make their contribution to this dynamic research field.