Experimental and theoretical studies of effective thermal conductivity of composites made of silicone rubber and Al2O3 particles

Recently emerging trends in thermal conductivity of polymer nanocomposites

“…Hence, the influence of nanoparticles/polymer interfacial adhesion in thermal conductivity of PNCs is significant. The thermal conductivity of nanoparticles is perceived to be within the same range as the thermal conductivity of the components (Gao et al 2015, Ren et al 2015. However, this is not validated.…”

“…Numerous studies have been conducted to enhance heat dissipation properties of nanocomposites via such strategies as (i) application of high intrinsic heatconductive filler such as heat-dissipative nanocomposites reinforced with inorganic nanofillers such as BN (Liem and Choy 2013), AlN (Chiu et al 2015), and silicon carbide (SiC) (Huang et al 2012a,b), which facilitates superior thermal conductivity in comparison with composites reinforced with inorganic fillers such as aluminum oxide (Al 2 O 3 ) (Gao et al 2015), silicon dioxide (SiO 2 ) (Fang et al 2015), and zinc oxide (ZnO) (Fang et al 2015), because of their inherent superior intrinsic rate of heat transfer; (ii) application of hybrid fillers, which inculcates synergism through the combination of various nanofillers with potentials of providing higher packing fraction when compared with nanocomposites reinforced with single fillers, resulting in the provision of more efficient conductive pathways in the nanocomposites (Chiu et al 2015, Fang et al 2015, Gao et al 2015; and (iii) optimization of processing conditions relative to influence of the speed, temperature, and time of compounding which hinder efficient and homogeneous dispersion of nanofiller thereby aggravating the agglomeration of filler particles, which in turn results in reduction of nanocomposite affinity for thermal conductivity (Fang et al 2015, Gao et al 2015.…”

“…Enhanced out-of-plane heat dissipation of fiber-filled polymer composite materials facilitates low-weight structures in the integration of efficient thermal management. Heat dissemination via its relatively thin thickness direction can be enhanced through inclusion of highly conducting fillers strategically and sparingly across the thickness direction (Gao et al 2015). This study combined an infrared camera temperature measurement system with a finite-element technique in the investigation of natural convection impact on the effective heat dissipation of such heterogeneous materials (Yu and Cennini 2014).…”

Linear model for thermal conductivity of dispersed materials based on polymer binder

“…Анализу теплопроводности гетерогенных смесей посвящено множество публикаций, что объясняется сложностью проблемы, появлением новых, в том числе наноструктуриро-ванных материалов, расширением областей применения гетерогенных структур [1][2][3][4][5]. Тео-ретическое описание явлений переноса в твердых телах, жидких и газообразных средах бази-руется на сходстве основополагающих уравнений [1,6,7].…”

Simulation of thermal conductivity of three-component composition

“…Следовательно, по большей части гетерогенные смеси не являются механическими и это существенно затрудняет моделирование их свойств, в частности эффективной теплопроводности [1][2][3]. На практике согласие известных аналити-ческих формул эффективной теплопроводности и экспериментальных данных, за исключени-ем модельных экспериментов, достигается путем конструирования формул с использованием метода инверсии компонентов и определения эффективной теплопроводности агломератов наполнителя [3][4][5][6][7][8]. Теплопроводность агломератов наполнителя существенно ниже тепло-проводности его кристаллических частиц.…”