Journal
JOURNAL OF INORGANIC AND ORGANOMETALLIC POLYMERS AND MATERIALS
Volume 28, Issue 6, Pages 2439-2446Publisher
SPRINGER
DOI: 10.1007/s10904-018-0923-7
Keywords
Nano-TiO2; Composite coating; Polymer; Sulphoaluminate cement; Water-repellent
Categories
Funding
- National Key Research and Development Plan of China [2016YFB0303505]
- National Natural Science Foundation of China [51602126, 51672108]
- China Postdoctoral Science Foundation [2017M622118]
- State Key Laboratory of Silicate Materials for Architectures (Wuhan University of Technology) [SYSJJ2018-12]
- 111 Project of International Corporation on Advanced Cement-based Materials [D17001]
- University of Jinan Postdoctoral Science Foundation [XBH1716]
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To better understand the effect of nano-TiO2 (NT) on polymer-sulphoaluminate cement composite coating (PSCC), the rheological, mechanical, water-repellent and photocatalytic properties were systematically investigated. The results reveal that NT can not only improve the workability and mechanical properties but also give PSCC satisfactory photocatalytic property. The optimum content of NT is 0.4-0.6%. It can enhance rheological properties leading to a better workability. NT, as an active site, can optimize network structure between polymer and cement hydration, leading to bond and tensile strength of PSCC increase by 59 and 25%, respectively. Moreover, it can sharply decrease the water absorption by 17.6%. In addition, the RhB degradation ratio of PSCC can reach 76.1% under 5h UV radiation when the content of NT is 0.6%. Therefore, PSCC modified by NT has such advantages as both flexibility and rigidity, excellent water-repellent property and promising photocatalytic property.
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