کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
7892216 | 1509907 | 2014 | 10 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
The dielectric behavior and origin of high-k composites with very low percolation threshold based on unique multi-branched polyaniline/carbon nanotube hybrids and epoxy resin
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
سرامیک و کامپوزیت
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
New high-k composites based on unique multi-branched polyaniline (MSiPA)/multi-walled carbon nanotube (MWCNT) hybrids and epoxy (EP) resin were prepared. MSiPA/MWCNT/EP composite has much higher dielectric constant and lower dielectric loss than MWCNT/EP composite with the same loading of MWCNTs. Dielectric constant and loss at 100Â Hz of MSiPA3/MWCNT0.4/EP composite are 2.4 and 3.3Â ÃÂ 10â3 times the value of MWCNT0.4/EP composite, respectively; meanwhile the percolation threshold of MSiPA/MWCNT0.4/EP composites is as low as 0.51Â wt%, remarkably lower than that of available composites with coated MWCNTs. These attractive results are attributed to unique structures of MSiPA/MWCNT hybrids. The multi-branched structure, large polyaniline concentration and flexible Si-O chains make MSiPA have big ability to be coated on surfaces of MWCNTs through Ï-Ï interaction. Different from MWCNTs, MSiPA/MWCNT hybrids have good dispersion in EP matrix, forming more micro-capacitors and avoiding the loss of conductive currents. Equivalent circuits were built to further discuss the origin behind.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Composites Part A: Applied Science and Manufacturing - Volume 64, September 2014, Pages 1-10
Journal: Composites Part A: Applied Science and Manufacturing - Volume 64, September 2014, Pages 1-10
نویسندگان
Zhixiang Qiang, Guozheng Liang, Aijuan Gu, Li Yuan,