Effect of surface treatment with commercial silane coupling agents

Cattle bone-based hydroxyapatite (HA) powders were prepared. Three types of silane coupling agents, i.e. γ-aminopropyl triethoxysilane (APES), methyl trimethoxysilane (MTMS), and γ-glycidoxypropyl trimethoxysilane (GPMS) were used to modify the HA surface. Untreated HA powders and silane-treated HA powders were utilized to produce HA/polypropylene (PP) composites containing a 60% (w/w) of HA content. Effect of filler surface modification on properties of HA/PP composites were investigated. The results suggested that treating HA surface with a silane coupling agent enhances interaction at HA-PP interface. Among the silane coupling agents used in this study, APES is, on average, the most effective agent for enhancing stiffness of HA/PP composites.

Download Full-text

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

Applied Surface Science ◽

10.1016/j.apsusc.2020.147091 ◽

2020 ◽

Vol 529 ◽

pp. 147091 ◽

Cited By ~ 1

Author(s):

Jaehyun Wie ◽

Myeongjin Kim ◽

Jooheon Kim

Keyword(s):

Thermal Conductivity ◽

Surface Treatment ◽

Epoxy Composite ◽

Coupling Agents ◽

Silane Coupling Agents ◽

Silane Coupling ◽

Enhanced Thermal Conductivity

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