Page 227 - 《精细化工》2023年第8期

第 40 卷第 8 期 精 细 化 工 Vol.40, No.8
20 23 年 8 月 FINE CHEMICALS Aug. 2023

建筑用化学品
聚羧酸原位改性氧化石墨烯减水剂的

制备及对混凝土性能的影响

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高瑞军 ，李 娟 ，吕生华 ，张 豹 ，王宏霞 ，高春勇
（1. 中国建筑材料科学研究总院有限公司，北京 100024；2. 陕西科技大学 轻工科学与工程学院，陕西
西安 710021；3. 山东浩宇建材科技有限公司，山东 邹平 256200）
摘要：将异戊烯醇聚氧乙烯醚（IPEG）对氧化石墨烯（GO）进行原位酯化改性，合成了中间体 GO-IPEG，与
丙烯酸通过自由基共聚合反应制备了聚羧酸原位改性氧化石墨烯减水剂 GO-PCE，并将其用于混凝土中。利用
FTIR、Raman、UV-Vis 及 Zeta 电位分别对 GO-IPEG 和 GO-PCE 结构和性能进行了表征与测试，评价了其对混
凝土性能的影响。结果表明，IPEG 接枝到 GO 表面，然后 GO-IPEG 与丙烯酸发生原位接枝聚合反应。GO-PCE
依靠 IPEG 的空间位阻作用使其在基体中具有较优的分散效果。当 GO-PCE 折固掺量为 0.15%（以水泥质量为基
准，下同）时，GO-PCE 在水泥颗粒表面的吸附即可达到饱和，水泥净浆流动度高达 280 mm。当 GO-PCE 折固
–4
掺量为 0.2%时，混凝土 28 d 抗压强度为 57 MPa、28 d 收缩率为 1.90×10 、28 d 电通量为 1950 C。
关键词：氧化石墨烯；聚羧酸；原位聚合；混凝土性能；增强抗裂；建筑用化学品
中图分类号：TU528.042.2 文献标识码：A 文章编号：1003-5214 (2023) 08-1841-08

Preparation of polycarboxylic modified graphene oxide superplasticizer
via in situ polymerization and its influnence on concrete properties

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GAO Ruijun , LI Juan , LYU Shenghua , ZHANG Bao , WANG Hongxia , GAO Chunyong
（1. China Building Materials Academy Co., Ltd., Beijing 100024, China; 2. College of Bioresources Chemical and
Materials Engineering, Shaanxi University of Science & Technology, Xi'an 710021, Shaanxi, China; 3. Shandong Haoyu
Building Materials Technology Co., Ltd., Zouping 256200, Shandong, China）
Abstract: Polycarboxylic modified graphene oxide superplasticizer (GO-PCE) was prepared from in situ
free radical copolymerization of acrylic acid and intermediate isopentenol polyoxyethylene ether (IPEG)
modified graphene oxide (GO) (GO-IPEG) synthesized from in situ esterification reaction of IPEG and GO,
and then applied in concrete. The structure and properties of GO-IPEG and GO-PCE were characterized and
analyzed by FTIR, Raman spectra, UV-Vis and Zeta potential. The influence of GO-PCE on the
performance of concrete was further evaluated. The results indicated that IPEG was successfully grafted
onto the surface of GO and then reacted with acrylic acid by in situ free radical polymerization. GO-PCE
displayed better dispersion in matrix due to the steric resistance effect of IPEG. Cement with a GO-PCE
content of 0.15% (based on the mass of cement, the same below), achieved saturated adsorption of GO-PCE
on the surface of cement particle, while the fluidity reached 280 mm; Cement with a GO-PCE content of
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0.20%, the 28 d compressive strength 57 MPa, the 28 d shrinkage rate 1.90×10 , and the 28 d electric flux
1950 C, respectively.
Key words: graphene oxide; polycarboxylic; in situ polymerization; concrete properties; strength enhance
and crack resistance; building chemicals

收稿日期：2022-10-14; 定用日期：2023-03-02; DOI: 10.13550/j.jxhg.20220943
基金项目：国家重点研发计划项目（2019YFC1520603）
作者简介：高瑞军（1985—），男，博士，高级工程师，E-mail：gao_423@163.com。