In our previous research, the utilization of Gemini surfactants to control the dispersion and interaction of HNTs aerogels (HCAs) in the concrete matrix had obtained positive research results. In order to further deepen the research in this field, in this work, a Gemini surfactant with a new structure was synthesized, the surface modification characteristics of HCAs in a series of concrete systems were also investigated. Microstructures and properties of the composites were characterized by using scanning electron microscope (SEM), Fourier transform infrared (FTIR), Thermogravimetric analysis (TGA), and so on. The results showed that the newly synthesized Gemini surfactants had an ideal modification effect on the surface of HCAs. Compared with other traditional surfactants, Gemini had better hydrophobic and mechanical properties. Different molecular layers with hydrophilicity or hydrophobicity were constructed on the HCAs surface. The introduction of the modified HCAs could significantly improve the heat insulation performance and mechanical strength of concrete. The improvement of the above comprehensive properties could not have significant difference due to the different types of concrete matrix.

中文翻译：

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Gemini-卤钨矿气凝胶/混凝土复合材料的制备和隔热

在我们之前的研究中，利用Gemini表面活性剂控制HNTs气凝胶（HCA）在混凝土基质中的分散和相互作用已获得了积极的研究成果。为了进一步加深该领域的研究，在这项工作中，合成了一种具有新结构的Gemini表面活性剂，并研究了一系列混凝土体系中HCA的表面改性特性。通过扫描电子显微镜（SEM），傅立叶变换红外光谱（FTIR），热重分析（TGA）等对复合材料的组织和性能进行了表征。结果表明，新合成的Gemini表面活性剂对HCA表面具有理想的改性作用。与其他传统表面活性剂相比，Gemini具有更好的疏水性和机械性能。在HCA表面上构建具有亲水性或疏水性的不同​​分子层。改性HCA的引入可以显着提高混凝土的隔热性能和机械强度。由于混凝土基体类型的不同，上述综合性能的改善不会有显着差异。