聚乙烯醇纤维增强水溶性型芯的制备与性能  

Preparation and Properties of Water-Soluble Cores Reinforced by Polyvinyl Alcohol Fiber

作　　者：潘文轩 玄伟东[1] 段方苗 白小龙 任兴孚[1] 任忠鸣[1] PAN Wenxuan;XUAN Weidong;DUAN Fangmiao;BAI Xiaolong;REN Xingfu;REN Zhongming(School of Materials Science and Engineering,Shanghai University,Shanghai 200444,China;China United Gas Turbine Technology Co.,Ltd.,Beijing 100061,China)

机构地区：[1]上海大学材料科学与工程学院,上海200444 [2]中国联合重型燃气轮机技术有限公司,北京100061

出　　处：《上海金属》2022年第3期44-48,53,共6页Shanghai Metals

基　　金：国家自然科学基金(92060104);国家重大科技专项(2017-VII-0008-0102);上海市科委项目(20511107700);中国重燃项目(F035)。

摘　　要：以云母粉、NaHCO_(3)为填料,聚乙二醇为黏结剂,聚乙烯醇(polyvinyl alcohol,PVA)纤维为增强材料,利用热压注法制备了水溶性型芯,研究了PVA纤维含量对水溶性型芯性能的影响。结果表明:随着PVA纤维含量的增加,水溶性型芯的抗弯强度和水溶速率都呈先增大后减小的趋势;当PVA纤维质量分数为1.0%时,型芯的抗弯强度最高,为17.01 MPa;当PVA纤维质量分数为0.5%时,型芯的水溶速率最大,为1.52×10^(-3) g/s。同时,随着纤维含量的增加,型芯的抗吸湿性提高。此外,采用扫描电子显微镜分析了型芯断口的微观形貌,并探究了PVA纤维增强水溶性型芯性能的作用机制。In order to study the effect of polyvinyl alcohol(PVA)fiber content on the properties of watersoluble cores,the watersoluble cores with different amounts of PVA fiber were prepared by the hot injection method,using mica powder and NaHCO_(3) as filler,polyethylene glycol as binder and polyvinyl alcohol fiber as reinforcement material.The results showed that(a)with the increase in PVA fiber content,the flexural strength and water dissolution rate of the water-soluble cores increased at first and then decreased;(b)when the mass fraction of PVA fiber was 1.0%,the flexural strength reached a maximum value of 17.01 MPa;(c)when the mass fraction of PVA fiber was 0.5%,the maximum water soluble rate was 1.52×10^(-3) g/s.Moreover,the anti-hygroscopic ability of the core was enhanced with the increase in fiber content.In addition,the microstructures of core fracture were analyzed by scanning electron microscope,and the mechanism of the watersoluble cores reinforced by PVA fiber was explored.

关 键 词：水溶性型芯 聚乙烯醇纤维 抗弯强度 水溶溃散性 

分 类 号：TG221.1[金属学及工艺—铸造]