天然气管道清管器用水溶性PVAL材料制备及性能  

Preparation and Performances of Water Soluble PVAL Material for Natural Gas Pipeline Pig

作　　者：屈文涛[1] 王泽威 钟磊 张丹 陈一凡 Qu Wentao;Wang Zewei;Zhong Lei;Zhang Dan;Chen Yifan(Mechanical Engineering College,Xi'an Shiyou University,Xi'an 710065,China;First Branch of Shaanxi Yanchang Petroleum(Group)Pipeline Transportation and Gas Transportation,Yan'an 716000,China)

机构地区：[1]西安石油大学机械工程学院,陕西西安710065 [2]陕西延长石油(集团)管道运输输气第一分公司,陕西延安716000

出　　处：《工程塑料应用》2023年第2期39-46,共8页Engineering Plastics Application

基　　金：陕西省重点研发计划项目(2022GY-401);陕西省自然科学基础研究计划项目(2022JQ-571);陕西省教育厅科研计划项目(22JK0513);长安大学中央高校基本科研业务费专项资金项目(300102252511)。

摘　　要：针对现有清管器在作业过程中,因管内有效流通面积减小、管道内截面形状改变等现象而造成卡管的问题,研制了一款用于清管器的水溶性聚乙烯醇(PVAL)复合材料。利用PVAL与甘油为基底,分别以淀粉、酯化淀粉、木质纤维素为添加剂,通过熔融共混法制备了水溶性PVAL复合材料。采用傅里叶变换红外光谱仪、扫描电子显微镜、热重分析仪、差示扫描量热仪、接触角测量仪、万能拉力试验机及浸泡溶解法,研究水溶性PVAL复合材料的分子结构、微观形貌、热稳定性、表面亲疏水性、力学性能及溶解性能。结果表明,混合不同添加剂后,复合材料在高温环境下的稳定性增强、力学性能提高,材料溶解性、表面亲水性降低。其中添加酯化淀粉的水溶性PVAL复合材料具有较优异的综合性能,热熔温度为114.6℃,200℃高温下的质量保持率为81.28%,热稳定性高;力学性能优异,拉伸强度达到最高为2.0 MPa,在液体环境内作业的稳定性增强,水接触角为29.5°,表面亲水性最低,在常温纯水溶液中浸泡1.5 h后失重率达26%。研究成果可为水溶性清管器的材料遴选及水溶性清管器的研制提供新的解决思路。In order to solve the problem of pipe sticking caused by the reduction of effective flow area in the pipe and the shape change of the internal section of the pipe during the operation of the existing pig,a water-soluble polyvinyl alcohol(PVAL)composite material was developed for the pig.The water soluble PVAL composites were prepared by melt blending method using PVAL and glycerol as substrates,starch,esterified starch and lignocellulose as additives respectively.The molecular structure,micro morphology,thermal stability,surface hydrophobicity,mechanical properties and dissolution properties of the water-soluble composites were studied by Fourier infrared spectroscopy,scanning electron microscopy,thermogravimetric analysis,differential scanning calorimetry,contact angle measuring instrument,universal tensile testing machine and immersion dissolution method.The results show that the stability under high temperature and mechanical properties of the composites are improved,and the solubility and surface hydrophilicity of the composites are decreased after mixing different additives.The water-soluble composite added with esterified starch has excellent comprehensive properties.The hot melting temperature is 114.6℃,the quality retention rate at 200℃is 81.28%,and the thermal stability is high.The mechanical properties are excellent,the tensile strength reaches the maximum of 2.0MPa,the stability of operation in the liquid environment is enhanced,the water contact angle is 29.5°,the surface hydrophilicity is the lowest,and the weight loss rate reaches 26%after soaking in the pure aqueous solution at room temperature for 1.5 h.The research results can provide a new solution for material selection and development of water-soluble pig.

关 键 词：清管器 水溶性材料 微观形貌 力学性能 溶解性能 

分 类 号：TQ320[化学工程—合成树脂塑料工业]