Journal
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
Volume 57, Issue 9, Pages 3255-3262Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acs.iecr.7b04970
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Funding
- National Natural Science Foundation of China [51503019]
- Beijing Natural Science Foundation [2162014]
- Beijing Science and Technology Project of Beijing Municipal Education Commission [KM201710017005]
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Inspired by unparalleled adhesion of mussels, bioinspired poly(dopamine) (PDA) has been used to functionalize the surface of aluminum oxide (Al2O3) nanoparticles aiming at improving the thermal conductivity of silicone rubber (SR). The successful and effective preparation of PDA modified Al2O3 nanoparticles (Al2O3-PDA) was confirmed by XPS, HR-TEM, and XRD. The PDA coating on the Al2O3 nanoparticles improved its interfacial interaction between polymeric matrix and facilitated the uniform-dispersion of filler, leading to the 30 vol % Al2O3-PDA/SR composite that exhibited a high thermal conductivity (0.585 W/((m.K))), which was almost 400% of pure silicone rubber (0.147 W/(m.K)). In addition, the 30 vol % Al2O3-PDA/SR composite displayed a relatively low dielectric constant (4.06 at 1 kHz), which was a bit higher than that of pure SR (2.59 at 1 kHz), a big advantage for the electronic or electrical engineering application. With advantages of efficient, easy handling, controllable, and eco-friendly, this modification method provides a new universal route to improve the thermal conductivity of composites.
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