Large-scale preparation of high-performance boron nitride/aramid nanofiber dielectric composites

查看全文 作　　者：Liying [1]Su;Xiaoyan [2]Ma;Jiale [1]Zhou;Xiangchen [3]Liu;Fanglin [1]Du;Chao [1]Teng

机构地区：[1]College of Materials Science and Engineering,Qingdao University of Science and Technology,Qingdao 266042,China;[2]College of Chemical Engineering,Qingdao University of Science and Technology,Qingdao 266042,China;[3]Weihai Jin Hong Group Co.,Ltd.,Weihai 264211,China

出　　处：《Nano Research》索引2022年第15卷第9期,共8页

基　　金：the National Natural Science Foundation of China(No.22075161). 摘　　要：Dielectric polymers featuring high thermal conductivity,excellent mechanical,and stable dielectric properties over a broad temperature range have attracted extensive scientific attention.In this work,a large-scale,layered film was fabricated using blade-coating approach,which integrated aramid nanofibers(ANFs)and boron nitride nanosheets(BNNSs)through a typical solgel transformation procedure.The as-prepared film with 20 wt.%BNNS displays high thermal conductivity(14.03 W·m^(−1)·K^(−1)),103-fold higher than pure ANF film,attributing to massive continuous thermal conduction pathway between BNNSs so as to facilitate fast phonon transmission.The film boasts excellent mechanical properties(stress 97.14±5.17 MPa,strain 19.36±0.35%),high degradation temperature(~542℃),a moderate dielectric constant(~6.9 at 104 Hz),together with low dielectric loss(~0.026 at 104 Hz).Meanwhile,the film reveals high breakdown voltage(310 MV·m^(−1))and volume resistivity(1013Ω·cm).Notably,these dielectric properties remain largely unchanged over a wide temperature range(25 to 200℃). 关键词：multifunctional composites thermal properties mechanical properties dielectric properties

相关文献

参考文献（45）
引证文献（3）
耦合文献（39）

参考文献(45)

引证文献(3)

耦合文献(39)

互联网出版许可证新出网证(渝)字10号全国400电话 - 免长途话费

Large-scale preparation of high-performance boron nitride/aramid nanofiber dielectric composites

参考文献(45)

引证文献(3)

耦合文献(39)

用户提示