Yixin Han, Kunpeng Ruan and Junwei Gu*. Multifunctional Thermally Conductive Composite Films Based on Fungal Tree-like Heterostructured Silver Nanowires@Boron Nitride Nanosheets and Aramid Nanofibers. Angewandte Chemie International Edition, 2023, 135(5): e202216093. 2021IF=16.823.（1區(qū)化學(xué)Top期刊）
https://doi.org/10.1002/anie.202216093
Abstract
Thermal conduction for electronic equipment has grown in importance in light of the burgeoning of 5G communication. It is imperatively desired to design highly thermally conductive fillers and polymer composite films with prominent Joule heating characteristics and extensive mechanical properties. In this work, “solvothermal & in-situ growth” method is carried out to prepare “Fungal tree”-like hetero-structured silver nanowires@boron nitride nanosheet (AgNWs@BNNS) thermally conductive fillers. The thermally conductive AgNWs@BNNS/ANF composite films are obtained by the method of “suction filtration self-assembly and hot-pressing”. When the mass fraction of AgNWs@BNNS is 50 wt%, AgNWs@BNNS/ANF composite film presents the optimal thermal conductivity coefficient of 9.44 W/(m·K) and excellent tensile strength of 136.6 MPa, good temperature-voltage response characteristics, superior electrical stability and reliability, which promise a wide application potential in 5G electronic devices.
通過“溶劑熱法-原位生長法”制備出“真菌樹”狀銀納米線@氮化硼納米片（AgNWs@BNNS）異質(zhì)結(jié)構(gòu)導(dǎo)熱填料，再與化學(xué)解離制備的芳綸納米纖維（ANF）復(fù)合，經(jīng)“抽濾自組裝-熱壓”法制備出AgNWs@BNNS/ANF導(dǎo)熱復(fù)合膜。當(dāng)AgNWs@BNNS的質(zhì)量分數(shù)為50 wt%時，AgNWs@BNNS/ANF導(dǎo)熱復(fù)合膜具有優(yōu)異的導(dǎo)熱性能（導(dǎo)熱系數(shù)為9.44 W/(m·K)）和拉伸強度（136.6 MPa）、良好的溫度-電壓響應(yīng)特性（低供電電壓下的高焦耳加熱溫度（5 V、240.6 ℃）以及快速響應(yīng)時間（10 s））、優(yōu)異的電穩(wěn)定性和可靠性（1000次、6000 s拉伸-彎曲疲勞工作下穩(wěn)定和恒定的實時電阻）。
本文亮點
1. 通過“溶劑熱法-原位生長法”制備出“真菌樹”狀銀納米線@氮化硼納米片（AgNWs@BNNS）異質(zhì)結(jié)構(gòu)導(dǎo)熱填料。
2. AgNWs@BNNS/ANF導(dǎo)熱復(fù)合膜兼具高達9.44 W/(m·K)的面內(nèi)熱導(dǎo)率以及優(yōu)異的拉伸強度（136.6 MPa）。
3. AgNWs@BNNS/ANF導(dǎo)熱復(fù)合膜具有良好的溫度-電壓響應(yīng)特性（如低供電電壓下的高焦耳加熱溫度（5 V、240.6℃）以及快速響應(yīng)時間（10 s））。
4. AgNWs@BNNS/ANF導(dǎo)熱復(fù)合膜具有優(yōu)異的電穩(wěn)定性和可靠性（1000次、6000 s拉伸-彎曲疲勞工作下穩(wěn)定和恒定的實時相對電阻）。