海岛纤维用增塑改性聚乙烯醇的制备及其性能  

Preparation and properties of plasticized polyvinyl alcohol for sea-island fiber production

作　　者：王双华 王冬 付少海 仲鸿天[3] 董朋 WANG Shuanghua;WANG Dong;FU Shaohai;ZHONG Hongtian;DONG Peng(Jiangsu Engineering Research Center for Digital Textile Inkjet Printing,Wuxi,Jiangsu 214122,China;Key Laboratory of Eco-Textiles(Jiangnan University),Ministry of Education,Wuxi,Jiangsu 214122,China;Jiangsu Jujie Microfiber Technology Group Co.,Ltd.,Suzhou,Jiangsu 215200,China)

机构地区：[1]江苏省纺织品数字喷墨印花工程技术研究中心,江苏无锡214122 [2]生态纺织教育部重点实验室(江南大学),江苏无锡214122 [3]江苏聚杰微纤科技集团股份有限公司,江苏苏州215200

出　　处：《纺织学报》2023年第4期8-15,共8页Journal of Textile Research

基　　金：全国博士后管委会香江学者计划项目(XJ2021020)。

摘　　要：为解决海岛纤维碱减量带来的环境污染问题,以双季戊四醇、硬脂酸钙和抗氧剂B225为复配增塑剂,对聚乙烯醇(PVA)进行增塑改性,通过熔融加工制备了高热分解温度的改性PVA。通过研究三者的添加量及熔融加工温度对PVA性能的影响,优化PVA的增塑改性工艺。对PVA与复配增塑剂之间的氢键作用、改性PVA的断面形貌、结晶结构进行了表征和分析。结果表明:当双季戊四醇、硬脂酸钙和抗氧剂B225的质量占比分别为15、3和1,熔融加工温度为200℃时,复配增塑剂与PVA之间的氢键作用较强,PVA结晶度降低,熔点降低到178.2℃,热分解温度提高到301.3℃,提供了123.1℃的加工窗口;改性PVA水溶性良好,在25℃下也能完全溶解。研究结果为实现以PVA为海组分的绿色环保海岛纤维的制备提供参考和技术支持。Objective Sea-island fibers,which are mostly prepared by melt composite spinning,are favored by the textile industry due to the excellent properties and high added value.Alkali-soluble polyester(COPET)is the common sea component of PVA to be removed by alkali decrement method that will cause environmental pollution.Polyvinyl alcohol(PVA)is expected to replace COPET as the sea component to solve environmental pollution,because it is green,non-toxic and water-soluble.Method Due to amounts of strong intermolecular/intramolecular hydrogen bonds of PVA,the melting point is approximate to the thermal decomposition temperature,which leads to difficulty for melt processing.Modified PVA with high thermal decomposition temperature was prepared by melt blending with compound plasticizers,which consisted of dipentaerythritol,calcium stearate and irganox B225.The effects of compound plasticizers on thermal properties and fluidity of PVA were investigated by DSC,TG and melt flow rate.The suitable processing temperature of PVA was obtained by torque rheometer.The intermolecular hydrogen bonds,crystallinity and compatibility of modified PVA were analyzed by FT-IR,XRD and SEM.Results The melt-forming property and thermostability of PVA were improved obviously via introducing compound plasticizers.When the contents of dipentathritol,calcium stearate and irganox B225 were 15%,3%,and 1%,respectively,the thermal decomposition temperature of modified PVA was up to 301.3℃and the melting point reduced to 178.2℃(Fig.1,Fig.3 and Fig.5),providing a thermal processing window of 123.1℃.The modified PVA showed a transparent appearance due to its good melt fluidity and outstanding oxidation resistance(Fig.2,Fig.4 and Fig.6).The plasticization and melt fluidity of modified PVA were significantly enhanced with the increase of melting processing temperature(ranging from 195 to 210℃).Obviously,when the processing temperature reached up to 200℃,the modified PVA could be well plasticized(Tab.2).The compound plasticizers could effectively d

关 键 词：聚乙烯醇 熔融加工 高热分解温度 增塑改性 水溶性 海岛纤维 

分 类 号：TQ325.9[化学工程—合成树脂塑料工业] TQ327.8