Cu-BTC改性水泥基复合材料的微观结构和力学性能  

Microstructure and Mechanical Properties of Cu-BTC 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 Key Laboratory of Comprehensive Utilization of Tailings Resources,Shangluo University,Shangluo 726000,China;Key Laboratory of Auxiliary Chemistry&Technology for Chemical Industry,Ministry of Education,Shaanxi University of Science&Technology,Xi’an 710021,China;College of Chemistry and Materials Science,Weinan Normal University,Weinan 714099,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,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,西安710021 [3]渭南师范学院化学与材料学院,渭南714099

出　　处：《当代化工》2021年第9期2054-2058,共5页Contemporary Chemical Industry

基　　金：陕西省教育厅重点实验室项目(项目编号:19JS024);轻化工助剂化学与技术教育部重点实验室开放基金(项目编号:KFKT2019-11);商洛市科研创新项目(项目编号:SK2018-03-02)。

摘　　要：以金属-有机骨架化合物(Cu-BTC)为改性剂,对水泥基复合材料进行了改性,获得了具有规整蛛网状结构的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分析。实验结果表明:引入Cu-BTC并不会改变水化产物的构成,而Cu-BTC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-BTC的生长过程为模板,两者协同竞争,最终形成具有大面积规整均匀的蛛网状微观形貌。力学性能表征表明:当Cu-BTC的质量分数为2.0%时,改性水泥基复合材料28 d的抗压强度最高达28.80MPa,较空白样品提高了54.84%,这说明Cu-BTC的模板化调控作用有利于改善水泥基复合材料的力学性能。In order to obtain a modified cement-based composite material with a regular cobweb-like structure, the metal-organic frameworks(Cu-BTC) was used as the modifier to modify the cement-based composite materials. 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 introduction of Cu-BTC did not change the composition of hydration products, and the active group —COOH contained in Cu-BTC could induce hydration products to form growth sites. The hydration product was followed by the Cu-BTC growth process as a template, and the hydration product and Cu-BTC competed in concert to form a cobweb-like micro morphology with a large area and uniformity. The mechanical properties showed that when the content of Cu-BTC was 2.0%, the 28 d compressive strength of the modified cement-based composite material was up to 28.80 MPa, which was 54.84% higher than the control sample. Thus experiment displayed that Cu-BTC’s templating regulation effect was beneficial to improving the mechanical properties of cement-based composites.

关 键 词：Cu-BTC 水泥基材料 水化产物 微观结构 

分 类 号：TQ050.4[化学工程]