Radiation synthesis of polysilane‐modified graphene oxide for improving thermal conductivity and mechanical properties of silicone rubber

Dai, Peng; Jiao, Yang; Ma, Hongchao; Zeng, Xin; Lü, Yongjun; Wang, Liancai; Bao, Ming; Zhai, Maolin

doi:10.1002/app.47776

Cited by 16 publications

(7 citation statements)

References 37 publications

(38 reference statements)

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“…“Bound rubber” tests are often used to check whether physical interactions are established between an elastomer polymer and a selected filler. This test relies upon the determination of the quanlitity of polymer adsorbed ( Q ads ) on the filler surface . Q ads is calculated by using the following Equation :

Q_{ads} = \frac{M_{D} - M_{HCSW}}{M_{HCSW}}

…”

Section: Methodsmentioning

confidence: 99%

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Surface modification of calcium sulfate whisker using thiol‐ene click reaction and its application in reinforced silicone rubber

Chen

Ding

Dong

et al. 2020

Journal of Polymer Science

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The hemihydrate calcium sulfate whisker (HCSW) was modified by γ‐(methacryloxy)propyl trimethoxy silane (KH570) and trimethylolpropane tris(3‐mercaptopropionate) via wet modification and thiol‐ene click reaction, and then the unmodified and modified HCSW were added into α, ω‐dihydroxy polysiloxane (DPS) matrix to prepare silicon rubber composites. After the dual‐surface modification, the surface of HCSW was transformed to hydrophobic, the hydration of whisker was obviously improved, and the whisker dispersed more evenly in the polymer. The mechanical properties, dynamic mechanical properties, and the medium resistance of the silicone rubber composite were compared. The tensile test shows that the silicone rubber shows better mechanical properties after adding the modified whiskers, among which HCSW‐KH570‐SH has the most significant reinforcement effect. Moreover, DPS/HCSW‐KH570‐SH shows the best medium resistance in toluene, gasoline, and water. The addition of modified whiskers can improve the storage modulus of silicone rubber significantly, while DMA and DSC show that the addition of modified whiskers can reduce the glass transition temperature of silicone rubber. The bound rubber indicates that the interface interaction between HCSW‐KH570‐SH and silicone rubber is the best.

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Q_{ads} = \frac{M_{D} - M_{HCSW}}{M_{HCSW}}

…”

Section: Methodsmentioning

confidence: 99%

“…This test relies upon the determination of the quanlitity of polymer adsorbed (Q ads ) on the filler surface. [29] Q ads is calculated by using the following Equation (2):…”

Section: Characterization Of Dps Compositesmentioning

confidence: 99%

Surface modification of calcium sulfate whisker using thiol‐ene click reaction and its application in reinforced silicone rubber

Chen

Ding

Dong

et al. 2020

Journal of Polymer Science

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“…11 However, pure SR cannot be served as thermal interface materials (TIMs) directly due to its low thermal conductivity and poor mechanical properties. Nowadays, ceramic fillers, including alumina (Al 2 O 3 ), 12 boron nitride (BN), 13 silica, 14 aluminum nitride (AlN), 15 and carbon-based materials, including carbon fiber (CF), 16 graphite, 17 graphene oxide, 18 and carbon nanotubes(CNTs) 19 ), have gained widespread attention, and they are used as thermally conductive fillers. However, these fillers added to the SR matrix either cannot meet the requirement of electrical insulation or need very high filling content to attain the satisfactory thermal conductivity at the expense of increasing cost and reducing mechanical properties because of the high interfacial thermal resistance between the fillers and polymer matrix.…”

Section: Introductionmentioning

confidence: 99%

Investigation on preparation, thermal, and mechanical properties of carbon fiber decorated with hexagonal boron nitride/silicone rubber composites for battery thermal management

Meng

Dai²,

Chen

et al. 2020

Int J Energy Res

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Adding thermally conductive filler to polymer matrix is a workable way to increase its thermal conductivity. In this work, carbon fiber (CF) and hexagonal boron nitride (h-BN) were employed to obtain hybrid fillers, firstly, (mh-BN@CF) by electrostatic self-assembly method, then added mh-BN@CF to silicone rubber (SR) matrix to prepare mh-BN@CF/SR composites. There was a good interface compatibility between mh-BN@CF and SR matrix. Besides, the composites can achieve best thermal conductivity when h-BN and CF are at the optimal fill ratio. When the mass ratio of h-BN:CF is7:3 and the filling content is 54 phr, the thermal conductivity of mh-BN@CF/SR can reach 1.3 W/ (m K), and it is 23.7% and 400.4% larger than the mixed-filled h-BN/CF/SR composites and SR matrix, respectively. Simultaneously, the mh-BN@CF/SR composites also exhibited good electrical insulation, mechanical properties, and thermal stability. Finally, the prepared composites are used in a liquidcooled battery thermal management system (BTMS). The effect of the composites on the performance of the BTMS is discussed by numerical method. The results show that the improved thermal conductivity of the composites can highly reduce the temperature of the battery cells. The prepared composites can highly enhance the performance of BTMS.

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“…Therefore, efficient heat dissipation has become a key issue to improve the high-performance service life of electronic devices. Many researchers have now used polymer substrates as thermal interface materials [1][2][3]. Polyurethane (PU) has excellent adhesion, low-temperature resistance, high elasticity, vibration damping and toughness, etc.…”

Section: Introductionmentioning

confidence: 99%

Polydopamine-Modified Al2O3/Polyurethane Composites with Largely Improved Thermal and Mechanical Properties

et al. 2020

Materials

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Alumina/polyurethane composites were prepared via in situ polymerization and used as thermal interface materials (TIMs). The surface of alumina particles was modified using polydopamine (PDA) and then evaluated via Fourier transform infrared spectroscopy (FTIR), thermogravimetric analysis (TG), and Raman spectroscopy (Raman). Scanning electron microscope (SEM) images showed that PDA-Al 2 O 3 has better dispersion in a polyurethane (PU) matrix than Al 2 O 3 . Compared with pure PU, the 30 wt% PDA-Al 2 O 3 /PU had 95% more Young's modulus, 128% more tensile strength, and 76% more elongation at break than the pure PU. Dynamic mechanical analysis (DMA) results showed that the storage modulus of the 30 wt% PDA-Al 2 O 3 /PU composite improved, and the glass transition temperature (Tg) shifted to higher temperatures. The thermal conductivity of the 30 wt% PDA-Al 2 O 3 /PU composite increased by 138%. Therefore, the results showed that the prepared PDA-coated alumina can simultaneously improve both the mechanical properties and thermal conductivity of PU. ceramic fillers, spherical Al 2 O 3 has often been used as electronic packaging materials because it exhibits higher thermal conductivity (32 W/m K), easier surface modification, wider source, higher load, lower viscosity, better fluidity, and excellent insulation performance [19,20]. Alumina as a thermal conductivity filler to enhance the thermal conductivity of polymers has been widely examined by many researchers [21][22][23].In general, the high thermal conductivity of polymer composites mainly depends on whether the filler has a good thermal conduction path or network, which is mainly related to the interfacial interaction and dispersion of the filler in polymers matrix [7,[24][25][26]. Generally speaking, poor interface combination between a thermal conductivity filler and polymer matrix leads to poor dispersion of the filler. These all cause strong phonon scattering and reduce phonon transmission efficiency, and then lead to the poor thermal conductivity of the interface [12,18,20,27,28]. It is reported that surface modification and functionalization of the filler can improve compatibility with the polymer matrix [29,30]. Common surface modification methods are hydroxylation [31], surfactant [32], coupling agent [27,33], etc. In recent years, bio-activated modification of polydopamine has become popular as a simple, environmentally-friendly, and efficient method. Polydopamine (PDA) is easy to adhere to the surface of inorganic and organic materials, and the abundant phenolic hydroxyl groups on the surface of polydopamine are conducive to the formation of stronger interaction with the resin matrix [9,13,17,34]. In this study, the surface of spherical Al 2 O 3 was modified using polydopamine as a modifier. In order to realize insulating composites with high thermal conductivity and mechanical properties, a high load of spherical Al 2 O 3 particles are required. However, if the filler cannot be uniformly dispersed in the matrix and has good compatibility with the ma...

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Radiation synthesis of polysilane‐modified graphene oxide for improving thermal conductivity and mechanical properties of silicone rubber

Cited by 16 publications

References 37 publications

Surface modification of calcium sulfate whisker using thiol‐ene click reaction and its application in reinforced silicone rubber

Surface modification of calcium sulfate whisker using thiol‐ene click reaction and its application in reinforced silicone rubber

Investigation on preparation, thermal, and mechanical properties of carbon fiber decorated with hexagonal boron nitride/silicone rubber composites for battery thermal management

Polydopamine-Modified Al2O3/Polyurethane Composites with Largely Improved Thermal and Mechanical Properties

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