Enhanced thermal conductivity of a polysilazane-coated A-BN/epoxy composite following surface treatment with silane coupling agents

The hexagonal boron nitride nanosheets (BN) were firstly treated by silane coupling agents 3-aminopropyltriethoxysilane (KH550) and 3-glycidoxypropyl-trimethoxysilane (KH560) to introduce some amino and epoxy (EP) groups on the BN surface. These modified BN nanosheets were incorporated into an EP matrix to prepare BN@KH560/EP composites with excellent thermal conductivity and electrical insulation properties. Results showed that the thermal conductivity of BN@KH560/EP composite with 20[Formula: see text]vol% BN dosage was found to be 0.442[Formula: see text]W/(m[Formula: see text]K), which was 81% higher than that of pure EP resin. Both BN/EP composites treated by KH550 and KH560 showed rather good electrical insulation properties, although the dielectric constant of BN@KH550/EP composites were slightly higher than BN@KH560/EP composites. Moreover, BN@KH560/EP composites also showed better thermal and mechanical properties than that of BN@KH550/EP composites.

Download Full-text

Surface treatment of CaCO3 with a mixture of amino- and mercapto-functional silane coupling agents and tensile properties of the rubber composites

Composite Interfaces ◽

10.1080/09276440.2018.1439629 ◽

2018 ◽

Vol 25 (8) ◽

pp. 743-760

Author(s):

Ryota Tsutsumi ◽

Tokio Sasaki ◽

Chisato Hashiguchi ◽

Ryota Yamazaki ◽

Syuji Fujii ◽

...

Keyword(s):

Surface Treatment ◽

Tensile Properties ◽

Coupling Agents ◽

Silane Coupling Agents ◽

Rubber Composites ◽

Silane Coupling

Download Full-text

Effect of surface treatment with commercial silane coupling agents

Dental Materials ◽

10.1016/j.dental.2015.08.037 ◽

2015 ◽

Vol 31 ◽

pp. e16

Author(s):

K. Ohashi ◽

K. Miyake ◽

H. Yamaguchi ◽

A. Teranaka ◽

T. Shiiya ◽

...

Keyword(s):

Surface Treatment ◽

Coupling Agents ◽

Silane Coupling Agents ◽

Silane Coupling ◽

Effect Of Surface

Download Full-text

Functionalization of Porous Clay Heterostructures with Silane Coupling Agents

Materiale Plastice ◽

10.37358/mp.17.2.4847 ◽

2017 ◽

Vol 54 (2) ◽

pp. 341-344

Author(s):

Anda Ionelia Mihai (Voicu) ◽

Sorina Alexandra Garea ◽

Eugeniu Vasile ◽

Cristina Lavinia Nistor ◽

Horia Iovu

Keyword(s):

Pore Volume ◽

Total Pore Volume ◽

Coupling Agents ◽

Silane Coupling Agents ◽

Porous Clay Heterostructures ◽

Bet Analysis ◽

Silane Coupling ◽

Ftir Spectrometry ◽

Textural Parameters ◽

Epoxy Groups

The goal of this paper was to study the modification of porous clay heterostructures (PCHs) with various silane coupling agents. Two commercial coupling agents (3-aminopropyl-triethoxysilane (APTES) and 3-glycidoxypropyl-trimethoxysilane (GPTMS)) with different functional groups (amine and epoxy groups) were used as modifying agents for the PCHs functionalization. The functionalization of PCH with APTES and GPTMS was evaluated by Fourier transform infrared (FTIR) spectrometry, thermogravimetric analysis (TGA), X-Ray Diffractions (XRD) and BET Analysis. FTIR spectra of modified PCHs confirmed the presence of characteristic peaks of silane coupling agents. TGA results highlighted an increase of weight loss for the modified PCHs that was assigned to the degradation of silane coupling agents (APTES and GPTMS) attached to the PCHs. The XRD results showed that the structure of modified PCHs was influenced by the type of the silane coupling agent. The functionalization of PCHs with silane coupling agents was also confirmed by BET analysis. Textural parameters (specific surface area (SBET), total pore volume (Vt )) suggested that the modified PCHs exhibit lower values of SBET and a significant decrease of total pore volume than unmodified PCHs.

Download Full-text