环氧树脂改善固井用偏高岭土地质聚合物的力学性能与机理  

Mechanical properties and mechanism of metakaolin geopolymer forcementing improved by epoxy resin

作　　者：李明[1] 郭岑 黄坤[2] 刘成[2] 陈睿 LI Ming;GUO Cen;HUANG Kun;LIU Cheng;CHEN Rui(School of New Energy and Materials,Southwest Petroleum University,Chengdu 610500,China;Exploration Unit of Southwest Oil and Gas Field Branch,PetroChina,Chengdu 610041,China)

机构地区：[1]西南石油大学新能源与材料学院,成都610500 [2]中国石油西南油气田分公司勘探事业部,成都610041

出　　处：《功能材料》2023年第2期2224-2230,共7页Journal of Functional Materials

基　　金：中国石油集团“十四五”前瞻性基础性重大科技项目(2021DJ4403)。

摘　　要：针对偏高岭土地质聚合物脆性较强的问题,研究了环氧树脂对偏高岭土地质聚合物力学性能的改善效果。研究结果表明,环氧树脂掺量为偏高岭土质量分数的2%时,偏高岭土地质聚合物的7 d抗压、抗拉和抗弯强度分别提升40%、36%和28%。对环氧树脂/偏高岭土地质聚合物进行XRD、FTIR、MIP和SEM/EDS测试。结果表明,环氧树脂均匀分散在偏高岭土地质聚合物之中,填充孔隙和优化孔隙结构;环氧树脂与偏高岭土地质聚合物之间的氢键作用增强了环氧树脂对基体裂纹的阻碍和偏转能力。上述作用使得偏高岭土地质聚合物的脆性得到改善。环氧树脂可以显著改善偏高岭土地质聚合物的力学性能,这有助于拓宽偏高岭土地质聚合物的应用领域。The improvement effect of epoxy resin on the mechanical properties of metakaolin geopolymer was investigated for the problem of strong brittleness of metakaolin geopolymer.According to the findings,the metakaolin geopolymer's 7 d compressive strength,tensile strength,and flexural strength were all raised by 40%,36%,and 28%,respectively,when epoxy resin concentration was 2%of the mass fraction of metakaolin.XRD,FTIR,MIP and SEM/EDS tests were performed on epoxy/metakaolin geopolymer.The results show that the epoxy resin can be uniformly dispersed in the metakaolin geopolymer to fill the pore space and optimize the pore structure.The hydrogen bonding between the epoxy resin and the metakaolin geopolymer enhances the obstruction and deflection ability of the epoxy resin to the matrix cracks.The above effects make the brittleness of metakaolin geopolymers improved.Epoxy resins can significantly improve the mechanical properties of metakaolin geopolymers,which can help broaden the application areas of metakaolin geopolymers.

关 键 词：偏高岭土地质聚合物 环氧树脂 养护时间 力学性能 改性机理 

分 类 号：TB33[一般工业技术—材料科学与工程]