IJE TRANSACTIONS B: Applications Vol. 31, No. 11 (November 2018) 1810-1815    Article in Press

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V. Rezazadeh and M. Mohammadizadeh
( Received: January 16, 2018 – Accepted: March 09, 2018 )

Abstract    Dispersing nanoparticles in a polymer matrix is intrinsically challenging due to unfavorable entropic interactions between the matrix and the nanoparticle. In this research dispersion of nanoparticles in polymer matrix was studied and the effect of dispersion on properties was investigated. The properties of polymer composite depend on the type, size, shape, concentration of nanoparticles, and interactions of polymer-nanaoparticle. The lack of compatibility between inorganic particles and polymer matrix limits the applications of produced nanocomposite. Due to incompatibility, the dispersion of nanoparticles in polymer matrix is very difficult. The epoxy/MWCNT composite was fabricated by solution mixing process. The effect of MWCNT and Amine-Functionalized surfactant, on curing process, EMI-shielding, mechanical and electrical properties of nanocomposite were investigated. Dispersion of MWCNT in solution was investigated using UV-vis spectroscopy. Curing behavior of nanocomposites at different MWCNT loadings was investigated. EMI-shielding of nanocomposite at different concentrations of MWCNT was studied and the results showed that MWCNT and ferric oxide improve absorption loss, reflection loss and shielding effectiveness. Effect of MWCNT inclusion on thermal and mechanical properties of nanocomposites was investigated. Finally, the electrical conductivity was measured using a two-point conductivity test method.


Keywords    Carbon Nanotubes; Electrical Conductivity; Epoxy; Nanocomposite; Surfactant


چکیده    پراکنش نانوذرات در یک ماتریس پلیمری بدلیل برهمکنش های آنتروپیک نامطلوب بین ماتریس و نانوذرات یک کار به شدت چالش برانگیز است. در ابن تحقیق پراکنش نانوذرات در ماتریس پلیمری مطالعه شد و اثر پراکنش روی خواص کامپوزیت بررسی شد. خواص کامپوزیت پلیمری به نوع، سایز، شکل و غلظت نانوذرات و نیز به برهم کنش پلیمر-نانوذره بستگی دارد. عدم وجود سازگاری بین نانوذرات معدنی و ماتریس پلیمری کاربردهای نانوکامپوزیت تولیدشده را محدود میکند. به دلیل این عدم سازگاری، پراکنش نانوذرات در ماتریس پلیمری امری دشوار است. نانوکامپوزیت اپوکسی/نانولوله کربن چند دیواره با فرایند اختلاط محلولی تهیه شد. اثر نانولوله چند دیواره و سورفکتانت آمینی روی شرایط پخت، شیلدینگ الکترومغناطیسی، خواص مکانیکی و الکتریکی نانوکامپوزیت بررسی شد. پراکنش نانولوله کربن چند دیواره در محلول با استفاده از UV-vis spectroscopy بررسی شد. رفتار پخت نانوکامپوزیت در مقادیر غلظت مختلف نانولوله کربن چنددیواره مطالعه گردید. شیلدینگ الکترومغناطیسی نانوکامپوزیت در مقادیر غلظتهای مختلف نانولوله کربن چنددیواره مطالعه شد و نتایج نشان داد که نانولوله کربن چنددیواره و اکسیدآهن موجب افرایش اتلاف جذبی، اتلاف انعکاسی و ضریب تاثیر شیلدینگ میگردد. اثر نانولوله کربن چنددیواره روس خواص حرارتی، و مکانیکی نانوکامپوزیت مطالعه شد. نهایتاً، رسانایی الکتریکی با استفاده از روش دونقطه ای اندازه گیری شد.


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