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Amorphous low molecular weight aromatic compounds possessing no weight loss behavior in fluoroalkyl end-capped vinyltrimethoxysilane oligomeric silica/hexagonal boron nitride nanocomposites even after calcination at 800°C
Journal of Coatings Technology and Research ( IF 2.3 ) Pub Date : 2020-03-16 , DOI: 10.1007/s11998-020-00331-6 Jittraporn Saengkaew , Takahumi Ogasawara , Katsumi Yamashita , Suwadee Kongparakul , Masakazu Nishida , Hideo Sawada
中文翻译:
即使在800°C煅烧后,在氟烷基封端的乙烯基三甲氧基硅烷低聚二氧化硅/六方氮化硼纳米复合物中也没有失重行为的无定形低分子量芳族化合物
更新日期:2020-03-16
Journal of Coatings Technology and Research ( IF 2.3 ) Pub Date : 2020-03-16 , DOI: 10.1007/s11998-020-00331-6 Jittraporn Saengkaew , Takahumi Ogasawara , Katsumi Yamashita , Suwadee Kongparakul , Masakazu Nishida , Hideo Sawada
Abstract
Fluoroalkyl end-capped vinyltrimethoxysilane oligomer [RF-(CH2CHSi(OMe)3)n-RF; n = 2, 3; RF = CF(CF3)OC3F7] undergoes the sol–gel reactions in the presence of hexagonal boron nitride (h-BN) nanoparticles and low molecular weight aromatic compounds (ArHs) such as bisphenol AF (BPAF) and 1-(2-naphthyl)ethanol (Naph-EtOH) under alkaline conditions at room temperature to afford the corresponding fluorinated oligomeric silica/h-BN/ArHs nanocomposites [RF-(VM-SiO3/2)n-RF/h-BN/ArHs]. TG–DTA analyses and XRD spectra measurements show that the encapsulated ArHs in the fluorinated oligomeric silica/h-BN nanocomposites exhibit an amorphous structure, affording no weight loss corresponding to the contents of the ArHs in the nanocomposites even after calcination at 800°C, although the simple blend hybrids of the RF-(VM-SiO3/2)n-RF/h-BN nanocomposites and the original ArHs provide not only the crystal characteristic toward the ArHs but also a clear weight loss behavior in proportion to the contents of the ArHs in the blend hybrids after calcination at 800°C. 1H MAS NMR spectra, UV–Vis spectra, and fluorescent spectra of the RF-(VM-SiO2)n-RF/h-BN/ArHs nanocomposites obtained through the sol–gel reactions under alkaline conditions showed the presence of the ArHs in the nanocomposites, respectively.Graphic abstract
中文翻译:
即使在800°C煅烧后,在氟烷基封端的乙烯基三甲氧基硅烷低聚二氧化硅/六方氮化硼纳米复合物中也没有失重行为的无定形低分子量芳族化合物