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Preparation of SiC whisker and application in reinforce of polystyrene resin composite materials
Author(s) -
Zhang Nianchun,
Yu Aixia,
Liang Aihui,
Zhang Renbo,
Xue Feng,
Ding Enyong
Publication year - 2013
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/app.39215
Subject(s) - whisker , materials science , ultimate tensile strength , composite material , izod impact strength test , tetraethyl orthosilicate , polystyrene , microcrystalline cellulose , silane , cellulose , chemical engineering , polymer , nanotechnology , engineering
A simple approach to fabricate silicon carbide (SiC) whisker is reported via using cellulose nanocrystal (CNC) as templates. The CNC with a length between 2 and 4 μm and a width about 40 nm is prepared by hydrolysis of microcrystalline cellulose (MCC) in strong sulfuric acid condition. The sol–gel reaction of tetraethyl orthosilicate (TEOS) is employed to coat the CNC in the presence of acetic acid as acid catalyst. The SiC whisker is obtained by calcination of CNC / SiO 2 hybrid at 1200°C. The obtained SiC whisker is found to have uniform size and shape with a length of ca. 2–4 μm and a width of 40 ± 5 nm. XRD, SEM, TEM (HRTEM), SAED, EDX and FTIR are used to characterize the samples. The obtained SiC whisker is used in polystyrene (PS) resin toughened. And mechanical properties of SiC / PS composites are tested by tensile impact experiments. The test results show that the 5 wt. % SiC whisker particles can disperse homogeneously in the PS resins which use a silane coupling agent (KF9701) as compatibilizer. Our results also show that the SiC whisker is excellent reinforcing material, which the tensile strength of SiC / PS composites attains 110 MPa and the Izod notched impact strength attains 5.00 KJ / m 2 . Comparing the pure PS resin, the tensile impact of SiC(5) / PS(94.5) / KF9701(0.5) composites can be increased by about 3 times and the Izod notched impact strength can be increased about 8 times. © 2013 Wiley Periodicals, Inc. J. Appl. Polym. Sci., 2013