Cu-PMA改性对水泥基复合材料微观结构和性能的影响  

Effect on Microstructure and Mechanical Properties of Cu-PMA Modified Cement-Based Composites

作　　者：杨强[1,2] 杨子华[1] 张佳 樊国栋 龚伟[1] 崔孝炜 YANG Qiang;YANG Zi-hua;ZHANG Jia;FAN Guo-dong;GONG Wei;CUI Xiao-wei(Shaanxi Engineering Research Center for Mineral Resources Clean&Efficient Conversion and New Materials,Shangluo University,Shangluo 726000,Shaanxi,China;Key Laboratory of Auxiliary Chemiscry&Technology for Chemical Industry,Ministry of Education,Shaanxi University of Science&Technology,Xi’an 710021,Shaanxi,China;College of Chemistry and Materials Science,Weinan Normal Univerisity,Weinan 714099,Shaanxi,China)

机构地区：[1]商洛学院陕西省矿产资源清洁高效转化与新材料工程研究中心,陕西商洛726000 [2]陕西科技大学教育部轻化工助剂化学与技术重点实验室,陕西西安710021 [3]渭南师范学院化学与材料学院,陕西渭南714099

出　　处：《合成材料老化与应用》2021年第5期45-48,共4页Synthetic Materials Aging and Application

基　　金：陕西省教育厅重点实验室项目(19JS024);国家级大学生创新创业计划(S202011396042);商洛市科研创新项目(SK2018-03-02);轻化工助剂化学与技术教育部重点实验室开放基金(KFKT2019-11);商洛学院科研项目(18SKY003)。

摘　　要：利用Cu-PMA对传统水泥基材料进行改性,制备了具有规整结构的Cu-PMA改性水泥基复合材料,并运用FT-IR、XRD、SEM、EDs等对其结构及性能进行了表征。实验结果表明,较未改性水泥基材料而言,Cu-PMA能够显著地提高水泥基复合材料的力学性能,且当Cu-PMA的含量为2.5%,改性水泥基复合材料的抗压强度可达30.60MPa,提高了54.54%;同时,实验发现,经Cu-PMA改性后,水泥基材料水化产物的构成并未发生变化,Cu-PMA含有的活性—COOH能够诱导水化产物形成生长位点,水化产物后续以Cu-PMA的生长过程为模板,形成具有大面积规整均匀的微观形貌。这说明Cu-PMA改性能够实现对水泥基材料微观结构的模板化调控,并改善其力学强度。In this work,Cu-PMA was used to modify traditional cement-based materials,and cement-based composite materials with regular structure which modified by Cu-PMA were prepared.The chemical structural characterization and mechanical performance testing were carried out by FT-IR,XRD,SEM,EDs and compressive strength.The results showed that the compressive strength of the modified cement-based composite material after curing for 28 days are 30.60 MPa when the content of Cu-PMA is 2.5%.Compared with unmodified cement materials,it increased by 54.54%.The composition of the hydrated products of the modified cement-based material did not changed.The active —COOH contained in Cu-PMA could induce the hydrated products to form growth sites.Hydration products follow the Cu-PMA growth process as a template to form a microscopic morphology with a largearea regular structure.Thus experimental results showed that Cu-PMA could template control the microstructure of cement-based materials and improve its compressive strength properties.

关 键 词：Cu-PMA 水泥基材料 水化产物 微观结构 

分 类 号：TQ235[化学工程—有机化工]