The aim of this research was to ascertain the influences of electrolytes and hydroxypropylsulfonation on paste stabilities of cassava starch/polyvinyl alcohol blend sizes. The hydroxypropylsulfonated cassava starch was prepared via hydroxypropylsulfonation of hydrolyzed cassava starch with 3-chloro-2-hydroxypropyl sulfonic acid sodium in an aqueous medium. The stability was evaluated by measuring the initial demixing time. Before and after the addition of the electrolytes such as NaH2PO4, Na2SO4, and NaCl, the initial demixing time was 24, 20, 18, and 15 min for hydroxypropylsulfonated cassava starch/PVA1799 paste and 21, 17, 15, and 14 min for hydrolyzed cassava starch/PVA1799 one. This showed that the electrolytes accelerated the separation rates of hydroxypropylsulfonated cassava starch/polyvinyl alcohol blend pastes and hydrolyzed cassava starch/polyvinyl alcohol ones, thereby reducing the stability, and the acceleration followed the order: NaH2PO4 > Na2SO4 > NaCl. Increasing the concentration of electrolyte accelerated the separation rate and lowered the stability. The hydroxypropylsulfonation was able to reduce the separation rate and enhance paste stability. When the weight percentage of starch was fixed, with the rise in the degree of substitution from 0.011 to 0.029, the initial demixing time gradually increased, indicating the gradual decreases in the separation rates, thereby promoting the enhancement in the stability. Moreover, PVA0588 was lower than PVA1799 and PVA1788 in affecting the separation rate, which implied that polyvinyl alcohol with a lower degree of polymerization favored to promote the stability.

中文翻译：

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电解质和羟丙基磺化对木薯淀粉/聚乙烯醇共混浆料用于经纱施胶的浆料稳定性的影响

本研究的目的是确定电解质和羟丙基磺化对木薯淀粉/聚乙烯醇共混胶浆糊稳定性的影响。通过水解木薯淀粉与 3-氯-2-羟丙基磺酸钠在水性介质中的羟丙基磺化制备羟丙基磺化木薯淀粉。通过测量初始分层时间来评估稳定性。在加入NaH2PO4、Na2SO4和NaCl等电解质前后，羟丙基磺化木薯淀粉/PVA1799糊剂的初始分层时间分别为24、20、18和15分钟，水解的初始分层时间为21、17、15和14分钟。木薯淀粉/PVA1799 一种。这表明电解质加速了羟丙基磺化木薯淀粉/聚乙烯醇混合糊和水解木薯淀粉/聚乙烯醇糊的分离速率，从而降低了稳定性，加速顺序为：NaH2PO4 > Na2SO4 > NaCl。增加电解液浓度会加快分离速度并降低稳定性。羟丙基磺化能够降低分离率并提高糊剂稳定性。当淀粉的重量百分比固定时，随着取代度从0.011升高到0.029，初始分层时间逐渐增加，表明分离率逐渐降低，从而促进稳定性的增强。此外，PVA0588对分离率的影响低于PVA1799和PVA1788，