改性磷酸盐胶黏剂的制备及性能表征  

Preparation and Performance Characterization of Modified Phosphate Adhesives

作　　者：默玉海 庞凌燕 刘千龙 刘辉[1] MO Yuhai;PANG Lingyan;LIU Qianlong;LIU Hui(School of Materials Science and Engineering,Shaanxi University of Science and Technology,Xi’an 710021,China)

机构地区：[1]陕西科技大学材料科学与工程学院,西安710021

出　　处：《材料导报》2023年第14期50-55,共6页Materials Reports

基　　金：国家重点研发计划项目(2019YFC1520100);国家自然科学基金(22101163);陕西科技大学研究生创新基金。

摘　　要：通过在磷酸和氢氧化铝配制的磷酸盐溶液中添加改性剂氧化铬制备了改性磷酸二氢铝基液,然后分别以氧化铬、氧化铝、氧化镁为固化剂,制备了三种改性磷酸盐胶黏剂。研究了改性剂氧化铬用量、不同固化剂对改性磷酸二氢铝基液和改性磷酸盐胶黏剂的组成、黏度及成膜性能等的影响,并进一步研究了将其应用于陶瓷材料黏结时不同种类的改性磷酸盐胶黏剂的黏结强度和固化时间的变化。结果表明:当向氧化铬改性剂用量为8%(质量分数)的改性磷酸二氢铝基液中分别添加7.5%(质量分数)的氧化铬、氧化铝和氧化镁固化剂时可制得具有较佳黏结强度的改性磷酸盐胶黏剂,其中氧化铬、氧化铝和氧化镁作为固化剂所得到的胶黏剂的最大黏结强度分别为1.22 MPa、1.11 MPa和0.73 MPa,固化时间分别为8 h、8 h和6 h。在改性剂和固化剂的共同作用下,通过分步固化的方式来实现常温固化,从而优化了固化过程,提升了胶黏剂的黏结强度,并缩短了固化时间。In this work,the phosphate liquid was prepared by phosphoric acid and aluminum hydroxide.Modified aluminum dihydrogen phosphate base liquid was prepared by adding chromium oxide as modifier.Three modified phosphate adhesives were prepared by modified aluminum dihydrogen phosphate base liquid with three curing agents:chromium oxide,alumina and magnesium oxide.The effects of chromium oxide modifier dosage and different curing agents on the composition,viscosity and film-forming properties of modified aluminum dihydrogen phosphate base liquid and modified phosphate adhesive were studied.Besides,the changes in bonding strength and curing time of different types of modified phosphate adhesives when applied to ceramic materials were further studied.The results showed that the optimal amount of chromium oxide modifier in modified aluminum dihydrogen phosphate base liquid is 8%.By separately adding 7.5%chromium oxide,alumina and magnesium oxide could obtain a modified phosphate adhesive with optimal bonding strength.The maximum bonding strength is 1.22 MPa,1.11 MPa and 0.73 MPa,respectively.As well as the curing times were 8 h,8 h and 6 h.With the combined action of modifier and curing agents,it could be cured at the room temperature by step-by-step curing.It optimizes the curing process,improves the bonding strength of the adhesive,and shor-tens the curing time.

关 键 词：改性磷酸盐胶黏剂 氧化铬 黏结强度 常温固化 固化时间 

分 类 号：TQ43[化学工程]