Naturally woven coconut sheath;
nanoclay;
XRD;
TEM and SEM;
modal damping;
FIBER;
NANOCOMPOSITES;
GLASS;
MONTMORILLONITE;
D O I:
10.1177/0021998312462618
中图分类号:
TB33 [复合材料];
学科分类号:
摘要:
Naturally woven coconut sheath, a new natural fiber available in the form of woven mat is used as fiber reinforcement in polyester matrix. The hybridization effect of montmorillonite (MMT) on naturally woven coconut sheath/polyester composite has been investigated experimentally for free vibration characteristics using impulse excitation technique (IET). In the present study, naturally woven coconut sheath/clay-reinforced hybrid polyester composites were fabricated using a compression molding machine. The effect of organoclay addition (1, 2, 3 and 5wt%), alkali (ATC) and silane treatment (STC) of the coconut sheath surface on free vibration characteristics were analyzed. Scanning electron microscopy (SEM), transmission electron microscopy (TEM) and X-ray diffraction (XRD) techniques were used to characterize the morphology of coconut sheath and structure of clay dispersed polyester. The dynamic mechanical analysis (DMA) and Fourier transform infrared (FTIR) analysis were carried out to analyze the effect of surface topology on chemically treated coconut sheath. The mechanism of chemical modifications on natural frequencies and the resultant improvement in the temperature dependence mechanical properties have also been reported. Enhanced vibration properties are observed up to 3wt% of clay dispersion in hybrid composites, then it gets reduced for higher clay (>3wt%) content. Modal damping of the hybrid composite is influenced by the addition of nanoclay and the surface treatments of the coconut sheath. Experimentally obtained natural frequencies are in good agreement with analytical and numerical results.
机构:
Changwon Natl Univ, Sch Nano & Adv Mat Engn, Gyeongnam 641773, South KoreaChangwon Natl Univ, Sch Nano & Adv Mat Engn, Gyeongnam 641773, South Korea
Chandradass, J.
Kumar, M. Ramesh
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机构:
Anna Univ, Dept Chem, Madras 600025, Tamil Nadu, IndiaChangwon Natl Univ, Sch Nano & Adv Mat Engn, Gyeongnam 641773, South Korea
Kumar, M. Ramesh
Velmurugan, R.
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机构:
Indian Inst Technol, Composites Technol Ctr, Madras 600036, Tamil Nadu, IndiaChangwon Natl Univ, Sch Nano & Adv Mat Engn, Gyeongnam 641773, South Korea
机构:
Changwon Natl Univ, Sch Nano & Adv Mat Engn, Gyeongnam 641773, South KoreaChangwon Natl Univ, Sch Nano & Adv Mat Engn, Gyeongnam 641773, South Korea
Chandradass, J.
Kumar, M. Ramesh
论文数: 0引用数: 0
h-index: 0
机构:
Anna Univ, Dept Chem, Madras 600025, Tamil Nadu, IndiaChangwon Natl Univ, Sch Nano & Adv Mat Engn, Gyeongnam 641773, South Korea
Kumar, M. Ramesh
Velmurugan, R.
论文数: 0引用数: 0
h-index: 0
机构:
Indian Inst Technol, Composites Technol Ctr, Madras 600036, Tamil Nadu, IndiaChangwon Natl Univ, Sch Nano & Adv Mat Engn, Gyeongnam 641773, South Korea