预糊化淀粉对水溶性洗衣袋用聚乙烯醇膜性能的影响

IF 0.6 4区综合性期刊 Q3 MULTIDISCIPLINARY SCIENCES

Chiang Mai Journal of Science Pub Date : 2022-11-30 DOI:10.12982/cmjs.2022.096

M. Sangthongdee, S. Phattarateera, P. Threepopnatkul

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引用次数: 0

摘要

本研究的目的是开发预糊化淀粉(P-St)和聚乙烯醇(PVOH)薄膜作为水溶性洗衣塑料袋，以避免通过挤压法接触感染COVID-19的衣服。研究了预糊化淀粉(P-St)含量对聚乙烯醇(PVOH)薄膜性能的影响。采用双螺杆挤出法制备PVOH和P-St共混物，P-St含量分别为0、10、20、30、40%(重量比)，甘油固定含量为20 phr。采用吹膜挤出法制备共混膜。表征了PVOH/G/P-St的化学结构、热性能、水溶性、力学性能和截面形貌。结果，FTIR证实了PVOH、甘油和P-St之间形成了分子间相互作用。此外，由于P-St中直链淀粉(一种非晶结构物质)的含量降低了PVOH/G/P-St的热稳定性，影响了PVOH/G/P-St的链柔韧性。差示扫描量热计结果表明，随着P-St含量的增加，PVOH和P-St之间的链纠缠影响了结晶度的降低，导致了熔融温度的降低，玻璃化转变温度随之升高。此外，水溶性将强烈依赖于糊化淀粉的百分比(%GS)。溶解度随GS含量的增加而降低。此外，P-St含量为20%的PVOH的拉伸强度和模量最高，P-St颗粒在PVOH/G中分布良好，说明P-St与PVOH/G的相互作用更强。

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The Eff ect of Pregelatinized Starch on the Properties of Poly (Vinyl Alcohol) Film for the Water-Soluble Laundry Bag

The goal of this study was to develop pregelatinized starch (P-St) and polyvinyl alcohol (PVOH) fi lms as water-soluble laundry plastic bags to avoid having contact with COVID-19 infected clothes by extrusion method. The effects of pregelatinized starch (P-St) content on the properties of polyvinyl alcohol (PVOH) fi lms were examined. PVOH and P-St blend were compounded by twin- screw extruder with various P-St content of 0, 10, 20, 30, and 40% by weight with fi xed glycerol content of 20 phr. The blend fi lms were produced by blown fi lm extrusion. The chemical structure, thermal properties, water-solubility, mechanical properties, and the cross-sections morphological properties of PVOH/G/P-St were characterized. As a result, the formation of intermolecular interactions between PVOH, glycerol and P-St was confi rmed by FTIR. Moreover, the addition of P-St on PVOH could reduce the thermal stability due to the content of P-St with amylose, a substance of amorphous structure, affecting the chains fl exibility of PVOH/G/P-St. From the differential scanning calorimeter result, the glass transition temperature was increased with the increment of P-St content because the chains entanglement between PVOH and P-St had affected the reduction in crystallinity and led to the decrement of the melting temperature. Furthermore, the water solubility would strongly be dependent on the percentage of the gelatinized starch (%GS). The solubility decreased as the percentage of the GS increased. In addition, PVOH with 20% of P-St fi lm possessed the highest value in tensile strength and modulus, and the particles of P-St have a good distribution in PVOH/G indicating to stronger interaction of P-St and PVOH/G.

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来源期刊

Chiang Mai Journal of Science MULTIDISCIPLINARY SCIENCES-

CiteScore

1.00

自引率

25.00%

发文量

103

审稿时长

3 months

期刊介绍： The Chiang Mai Journal of Science is an international English language peer-reviewed journal which is published in open access electronic format 6 times a year in January, March, May, July, September and November by the Faculty of Science, Chiang Mai University. Manuscripts in most areas of science are welcomed except in areas such as agriculture, engineering and medical science which are outside the scope of the Journal. Currently, we focus on manuscripts in biology, chemistry, physics, materials science and environmental science. Papers in mathematics statistics and computer science are also included but should be of an applied nature rather than purely theoretical. Manuscripts describing experiments on humans or animals are required to provide proof that all experiments have been carried out according to the ethical regulations of the respective institutional and/or governmental authorities and this should be clearly stated in the manuscript itself. The Editor reserves the right to reject manuscripts that fail to do so.