Chen Cong, Liang Jinsheng, Wang Fei, Tang Qingguo, Chen Yalei
J Nanosci Nanotechnol. 2014 May;14(5):3515-20. doi: 10.1166/jnn.2014.7980.
Surface modification is used to regulate surface free energy of sepiolite with 3-glycidoxypropyltrimethoxysilanes (3-GPTMS), 3-methacryloxypropyltrimethoxysilanes (3-MAPTMS) and 3-mercaptopropyltrimethoxysilane (3-MPTMS). Through characterization by Fourier transform infrared spectroscopy, surface free energy, zeta potential and sedimentation measurements and infrared emissivity, it is found that the surface free energy of 3-MPTMS modified sepiolite decreases to 31.72 mJ/m2 and the percentage of polar component increases to 89.75%, thus leading to that the infrared emissivity of 3-MPTMS modified sepiolite increase to be higher than 0.8 and the dispersion of sepiolite has been improved. The excellent thermal insulation property of coating is prepared with 10% additive amount of 3-MPTMS modified sepiolite and the temperature difference between upper and lower box of modified sepiolite coatings is 10 degrees C which is higher than the untreated sepiolite.
采用3-缩水甘油醚氧基丙基三甲氧基硅烷（3-GPTMS）、3-甲基丙烯酰氧基丙基三甲氧基硅烷（3-MAPTMS）和3-巯基丙基三甲氧基硅烷（3-MPTMS）对海泡石进行表面改性，以调节其表面自由能。通过傅里叶变换红外光谱、表面自由能、zeta电位、沉降测量和红外发射率表征发现，3-MPTMS改性海泡石的表面自由能降至31.72 mJ/m²，极性成分百分比增至89.75%，从而使3-MPTMS改性海泡石的红外发射率提高至高于0.8，且海泡石的分散性得到改善。以10%添加量的3-MPTMS改性海泡石制备的涂层具有优异的隔热性能，改性海泡石涂层的上下箱温差为10℃，高于未处理的海泡石。
