Modification of hexagonal boron nitride nanoparticles with fluorosilane

Nanocomposite glass coatings containing hexagonal boron nitride nanoparticles

“…In some coatings, hBN nanoparticles which were modified with 1H,1H,2H,2H-perfluorooktyl-triethoksysilane (FTS) (ABCR, 95%), were used. Surface modification of hBN nanoparticles was carried out at 150°C for 2 h under reflux condenser in MP [37].…”

“…The dispersed nanoparticles were modified with FTS in methoxy propanol for 2 h at 150°C, in a reflux condenser. After rinsing and centrifuging, they were dried in a rotary evaporator [37]. Modified and non-modified hBN nanoparticles were subjected to FT-IR analyses and the results are presented in Fig.…”

“…In the FT-IR spectrum of modified hBN, stretchings at 1100-1300 cm À 1 and at 635 cm À 1 are due to fluor bearing groups (-CF 2 and -CF 3 , respectively) [41]. The presence of FTS molecules on hBN nanoparticles indicate that fluorosilane modification was accomplished [37]. Modified hBN nanoparticles were introduced into the coating solutions and coatings containing modified hBN were obtained by the same procedure as the coatings containing non-modified hBN.…”

“…To the best of our knowledge, this type of coating has not been investigated previously. In our previous study, surfaces of the hBN nanoparticles were modified with 1H,1H,2H,2H-perfluorooktyltriethoksysilane (FTS) for rendering the hBN nanoparticles surfaces hydrophobic [37]. The aim of hydrophobic modification is to position the hBN nanoparticles on the outermost layer of the hydrophilic coating solution by a self-organizing process during solvent evaporation as shown in Fig.…”

Preparation of Fluoroalkyl End-Capped Oligomers/Hexagonal Boron Nitride Nanocomposites Possessing No Weight Loss Behavior in Nanocomposites Even after Calcination at 800°C

“…Therefore, there have been numerous reports on the development of the h-BN/organic polymer composites materials possessing such unique properties imparted by h-BN, especially excellent thermal conductivity [16]- [43], because h-BN can endow organic polymers with increased thermal conductivity, decreased coefficient of thermal expansion, and decreased dielectric loss, which cannot be achieved by the other inorganic fillers such as aluminum nitride and silicon carbide [44] [45]. From the developmental viewpoints of new fluorinated functional materials, it is of particular interest to develop the novel fluorinated h-BN nanocomposites; however, such studies have been very limited except for some reports on the surface modification of Open Journal of Composite Materials h-BN with perfluorooctyl-triethoxysilane [46] [47], perfluorobutyric acid [48], poly (tetrafluoroethylene) [49], and preparation of poly(vinylidene fluoride)/boron nitride nanosheet composite films [50]. Heretofore, we have been comprehensively studying on the synthesis and applications on the ABA triblock-type two found to give no weight loss behavior corresponding to the contents of oligomers in the nanocomposites even after calcination at 800˚C.…”