高效减水剂
材料科学
乙醚
胶凝的
色散(光学)
化学工程
水泥
纳米颗粒
高分子化学
复合材料
有机化学
化学
纳米技术
光学
物理
工程类
作者
Lei Qiu,Chunfeng Mao,Jiaqi Zhang,Yanyun Wang,Sujuan Ge,Rundong Wang,Yuzhong Huang,Yuming Zhou
标识
DOI:10.1177/17475198221091903
摘要
The combination of nanoparticles and polycarboxylate ether superplasticizers is expected to simultaneously improve the durability and mechanical properties of mortar and concrete. However, the uniform dispersion of nanoparticles in cement materials has always been a difficult challenge. In this paper, nanoparticles are modified with surfactants to provide a research direction for better dispersion of nanoparticles in cementitious materials. Modified allyl ether polycarboxylate superplasticizer with short-branched chains was synthesized from acrylic acid and allyl glycidyl ether. Nano-silica/polycarboxylate ether was obtained by grafting nano-silica onto polycarboxylate ether molecular chains through intermolecular dehydration, thus achieving a homogeneous dispersion of nano-silica in the cementitious material. The results show that nano-silica/polycarboxylate ether has better dispersibility in cement matrix and strong clay resistance, which compensates for the poor dispersion of polycarboxylate ether synthesized from conventional polyethylene glycol graft chains in the presence of clay impurities.
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