纳米复合材料
材料科学
复合材料
韧性
聚合物纳米复合材料
制作
微观结构
聚合物
热导率
极限抗拉强度
医学
病理
替代医学
作者
Dong Wang,Yu Zhang,Mengfei Zhang,Yang Wang,Ting Li,Tianxi Liu,Mingqing Chen,Weifu Dong
出处
期刊:Biomacromolecules
[American Chemical Society]
日期:2021-09-09
卷期号:22 (10): 4228-4236
被引量:6
标识
DOI:10.1021/acs.biomac.1c00786
摘要
Fabricating advanced polymer composites with remarkable mechanical and thermal conductivity performances is desirable for developing advanced devices and equipment. In this study, a novel strategy to prepare anisotropic wood-based scaffolds with a naturally aligned microchannel structure from balsa wood is demonstrated. The wood microchannels were coated with polydopamine-surface-modified small graphene oxide (PGO) nanosheets via assembly. The highly aligned porous microstructures, with thin wood cell walls and large voids along the cellulose microchannels, allow polymers to enter, resulting in the fabrication of the wood-polymer nanocomposite. The tensile stiffness and strength of the resulting nanocomposite reach 8.10 GPa and 90.3 MPa with a toughness of 5.0 MJ m-3. The thermal conductivity of the nanocomposite is improved significantly by coating a PGO layer onto the wood scaffolds. The nanocomposite exhibits not only ultrahigh thermal conductivity (in-plane about 5.5 W m-1 K-1 and through-plane about 2.1 W m-1 K-1) but also satisfactory electrical insulation (volume resistivity of about 1015 Ω·cm). Therefore, the results provide a strategy to fabricate thermal management materials with excellent mechanical properties.
科研通智能强力驱动
Strongly Powered by AbleSci AI