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Adhesion-to-fibers and film properties of etherified–oxidized cassava starch/polyvinyl alcohol blends
Iranian Polymer Journal ( IF 2.4 ) Pub Date : 2020-03-02 , DOI: 10.1007/s13726-020-00798-5
Wei Li , Lanjuan Wu , Zhenzhen Xu , Zhi Liu

In our previous work, it was demonstrated that etherified–oxidized cassava starch (EOCS) showed greater adhesion and film properties than oxidized cassava starch (OCS). Therefore, the purpose of this paper is to reveal if blending EOCS with polyvinyl alcohol (PVA) could further enhance the adhesion of OCS to cotton and polylactic acid (PLA) fibers and toughen OCS film. The EOCS samples were synthesized through etherification of OCS with 3-chloro-2-hydroxypropyl sulfonic acid sodium in an aqueous medium, and were characterized by Fourier transform infrared spectroscopic technique. The apparent viscosity of cooked EOCS/PVA paste was measured, and the adhesion was evaluated by measuring the bonding forces of the blends to cotton and PLA fibers. Film properties were analyzed in terms of tensile strength, breaking elongation, bending endurance, scanning electron microscopy and X-ray diffraction. It was found that blending EOCS with PVA was able to further enhance the adhesion of OCS to both fibers and toughen OCS film. The enhancement in the adhesion and the film toughness was correlated with blending ratio of EOCS to PVA. With the decrease in the ratio, the breaking elongation and bending endurance of the blend films and bonding forces significantly increased. By increasing the degree of substitution (DS) of EOCS, the bonding forces of EOCS/PVA blends to both fibers gradually increased. In the adhesion, the positive influence performed by the ratio is more than that performed by the DS. The EOCS/PVA with a ratio of 50:50 and a DS of 0.031 could be adopted to further improve the adhesion and film toughness of OCS.

中文翻译:

醚化氧化木薯淀粉/聚乙烯醇共混物的纤维粘附力和薄膜性能

在我们之前的工作中,已证明醚化氧化木薯淀粉(EOCS)比氧化木薯淀粉(OCS)表现出更大的附着力和薄膜特性。因此,本文的目的是揭示将EOCS与聚乙烯醇(PVA)掺混是否可以进一步增强OCS对棉和聚乳酸(PLA)纤维的粘附力,并使OCS膜增韧。通过在水介质中将OCS与3-氯-2-羟丙基磺酸钠醚化合成EOCS样品,并通过傅里叶变换红外光谱技术对其进行表征。测量了煮熟的EOCS / PVA糊的表观粘度,并通过测量掺混物对棉纤维和PLA纤维的粘合力来评估粘合性。根据拉伸强度,断裂伸长率,耐弯曲性,扫描电子显微镜和X射线衍射。发现将EOCS与PVA共混能够进一步增强OCS对两种纤维的粘附力并增韧OCS膜。粘附力和膜韧性的提高与EOCS与PVA的混合比有关。随着比率的降低,共混膜的断裂伸长率和弯曲耐久性以及结合力显着增加。通过增加EOCS的取代度(DS),EOCS / PVA共混物对两种纤维的粘合力逐渐增加。在附着力方面,由该比例产生的正面影响大于由DS产生的正面影响。可以采用EOCS / PVA的比例为50:50,DS为0.031,以进一步提高OCS的附着力和薄膜韧性。发现将EOCS与PVA共混能够进一步增强OCS对两种纤维的粘附力并增韧OCS膜。粘附力和膜韧性的提高与EOCS与PVA的混合比有关。随着比率的降低,共混膜的断裂伸长率和弯曲耐久性以及结合力显着增加。通过增加EOCS的取代度(DS),EOCS / PVA共混物对两种纤维的粘合力逐渐增加。在附着力方面,由该比例产生的正面影响大于由DS产生的正面影响。可以采用EOCS / PVA的比例为50:50,DS为0.031,以进一步提高OCS的附着力和薄膜韧性。发现将EOCS与PVA共混能够进一步增强OCS对两种纤维的粘附力并增韧OCS膜。粘附力和膜韧性的提高与EOCS与PVA的混合比有关。随着比率的降低,共混膜的断裂伸长率和弯曲耐久性以及结合力显着增加。通过增加EOCS的取代度(DS),EOCS / PVA共混物对两种纤维的粘合力逐渐增加。在附着力方面,由该比例产生的正面影响大于由DS产生的正面影响。可以采用EOCS / PVA的比例为50:50,DS为0.031,以进一步提高OCS的附着力和薄膜韧性。粘附力和膜韧性的提高与EOCS与PVA的混合比有关。随着比率的降低,共混膜的断裂伸长率和弯曲耐久性以及结合力显着增加。通过增加EOCS的取代度(DS),EOCS / PVA共混物对两种纤维的粘合力逐渐增加。在附着力方面,由该比例产生的正面影响大于由DS产生的正面影响。可以采用EOCS / PVA的比例为50:50,DS为0.031,以进一步提高OCS的附着力和薄膜韧性。粘附力和膜韧性的提高与EOCS与PVA的混合比有关。随着比率的降低,共混膜的断裂伸长率和弯曲耐久性以及结合力显着增加。通过增加EOCS的取代度(DS),EOCS / PVA共混物对两种纤维的粘合力逐渐增加。在附着力方面,由该比例产生的正面影响大于由DS产生的正面影响。可以采用EOCS / PVA的比例为50:50,DS为0.031,以进一步提高OCS的附着力和薄膜韧性。通过增加EOCS的取代度(DS),EOCS / PVA共混物对两种纤维的粘合力逐渐增加。在附着力方面,由该比例产生的正面影响大于由DS产生的正面影响。可以采用EOCS / PVA的比例为50:50,DS为0.031,以进一步提高OCS的附着力和薄膜韧性。通过增加EOCS的取代度(DS),EOCS / PVA共混物对两种纤维的粘合力逐渐增加。在附着力方面,由该比例产生的正面影响大于由DS产生的正面影响。可以采用EOCS / PVA的比例为50:50,DS为0.031,以进一步提高OCS的附着力和薄膜韧性。
更新日期:2020-03-02
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