Modulating electromagnetic interference shielding performance of ultra-lightweight composite foams through shape memory function
Modulating electromagnetic interference shielding performance of ultra-lightweight composite foams through shape memory function
复制标题
通过形状记忆功能调节超轻复合泡沫的电磁干扰屏蔽性能
DOI：
10.1016/j.compositesb.2020.108497
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发表时间：
2021
影响因子：
13.1
通讯作者：
Changhuai Ye
中科院分区：
文献类型：
--
作者：
Shu Zhu;Qingya Zhou;Mengya Wang;Jackson Dale;Zhe Qiang;Yuchi Fan;Meifang Zhu;Changhuai Ye
高性能电磁干扰屏蔽 (EMI) 材料在航空航天、军事和移动电子应用中是理想的选择。然而，通过节能环保的工艺制造具有可调节EMI屏蔽性能的智能超轻EMI屏蔽材料仍然具有挑战性。在此，我们演示了使用导电生物质衍生的d-葡萄糖二酸-壳聚糖/单壁碳纳米管（SWNT/GA-壳聚糖）聚合物复合层和结晶石蜡层来制备具有形状记忆和可调节EMI屏蔽功能的超轻质聚氨酯泡沫，其中通过外部刺激产生的形状变化使泡沫能够自主调节EMI屏蔽效率。涂有合成导电复合层的泡沫在 0.03 g/cm 3 的超低密度（仅含 0.171 vol% SWNT）下表现出 56 dB 的卓越 EMI 屏蔽效能。该泡沫还表现出超过 2000 次压缩恢复循环的超高耐用性。此外，引入石蜡层作为可逆网络导致形状记忆泡沫具有>95%的高固定率和>90%的恢复率。这些泡沫通过压缩控制其宏观形状，表现出从 18 dB 到 30 dB 的广泛可调 EMI 屏蔽效率。这种通过环保策略制造的具有形状记忆和可调节 EMI 屏蔽功能的智能泡沫代表了 EMI 屏蔽广泛应用的有前途的候选材料。
High-performance electromagnetic interference shielding (EMI) materials are desirable in aerospace, military and mobile electronics applications. However, fabrication of smart and ultra-lightweight EMI shielding materials with adjustable EMI shielding performance through an energy-efficient and environmental-friendly process is still challenging. Herein, we demonstrate using a conductive biomass-derived d -glucaric acid-chitosan/single-walled carbon nanotube (SWNT/GA-chitosan) polymer composite layer and a crystallized paraffin layer to fabricate ultra-lightweight polyurethane foams with shape memory and adjustable EMI shielding functions, of which the shape change via external stimulus enables the foams to adjust EMI shielding efficiency autonomously. The foam coated with synthesized conductive composite layers shows an exceptional EMI shielding effectiveness of 56 dB at an ultra-low density of 0.03 g/cm 3 with only 0.171 vol% SWNT. The foam also exhibits ultra-high durability over 2000 compression-recovery cycles. Furthermore, introduction of paraffin layer as a reversible network results in shape memory foams with high fixity ratio >95% and recovery ratio >90%. These foams exhibit a wide range of adjustable EMI shielding efficiency from 18 dB to 30 dB by controlling their macroscopic shape from compression. Such smart foams with shape memory and adjustable EMI shielding functions fabricated by an environmental-friendly strategy represent a promising material candidate for the wide applications of EMI shielding.
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影响因子：
13.1
作者：
Bagotia, Nisha;Choudhary, Veena;Sharma, D. K.
通讯作者：
Sharma, D. K.
影响因子：
15.1
作者：
Cui, Cheng-Hua;Yan, Ding-Xiang;Li, Zhong-Ming
通讯作者：
Li, Zhong-Ming
DOI：
10.1016/j.compositesa.2019.05.017
发表时间：
2019-08-01
影响因子：
8.7
作者：
Jiang, Qiuyue;Liao, Xia;Li, Guangxian
通讯作者：
Li, Guangxian
DOI：
10.1016/j.compositesb.2019.107378
发表时间：
2019-11
期刊：
Composites Part B: Engineering
影响因子：
--
作者：
Yan-Jun Tan;Jie Li;Jie-Hua Cai;Xiao-hong Tang;Jihui Liu;Zong-qian Hu;Ming Wang
通讯作者：
Yan-Jun Tan;Jie Li;Jie-Hua Cai;Xiao-hong Tang;Jihui Liu;Zong-qian Hu;Ming Wang
影响因子：
29.4
作者：
Zarek, Matt;Layani, Michael;Magdassi, Shlomo
通讯作者：
Magdassi, Shlomo