Ultratough reduced graphene oxide composite films synergistically toughened and reinforced by polydopamine wrapped carbon nanotubes
Ultratough reduced graphene oxide composite films synergistically toughened and reinforced by polydopamine wrapped carbon nanotubes
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聚多巴胺包裹碳纳米管协同增韧和增强的超韧还原氧化石墨烯复合薄膜
DOI：
10.1016/j.carbon.2019.12.044
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发表时间：
2020-04
期刊：
影响因子：
10.9
通讯作者：
Cheng Yan
中科院分区：
文献类型：
--
作者：
Rui Zou;Feng Liu;Ning Hu;Huiming Ning;Shu Wang;Kaiyan Huang;Xiaoping Jiang;Chaohe Xu;Shaoyun Fu;Yuanqing Li;Cheng Yan
在过去的十年里，像珠层一样的石墨烯基复合薄膜（GCFs）得到了发展。虽然。近年来，超强gcf的研究进展显著，制备了具有优异综合性能的gcf。力量、柔韧性和韧性仍然是一个挑战。这是还原石墨烯的三元GCF。开发了氧化石墨烯（rGO）、聚多巴胺（PDA）和多壁碳纳米管（MWCNTs）。的。用PDA修饰MWCNTs形成PDA@MWCNTs，然后与GO复合。通过蒸发诱导组装和化学还原制备rGO-PDA@MWCNT薄膜。的。制备方法简单、廉价、环保。PDA增加了色散。在rGO-PDA@MWCNT薄膜中的MWCNTs，交联了还原氧化石墨烯薄片，并增强了。MWCNTs和MWCNTs与还原氧化石墨烯薄片之间的相互作用。受益于的协同效应。随着PDA和MWCNTs的增加，rGO-PDA@MWCNT膜表现出优异的综合性能。强度、断裂应变和韧性分别为579±35 MPa、12.03±0.56%和34.03±1.60 MJ/m3。分别是纯氧化石墨烯膜的2.26倍、2.02倍和4.94倍。rGO-PDA@MWCNT电影。在极端环境下表现出612±68 S/cm的高电导率和优异的结构稳定性。这些优异的综合性能将促进rGO-PDA@MWCNT薄膜的性能。应用于航空航天工程、柔性电气装置和人造肌肉。
Nacre like graphene based composite films (GCFs) have been developed over the last decade. Although.the progress in ultrastrong GCFs is remarkable, fabricating GCFs with excellent integrated properties of.strength, flexibility, and toughness still remains a challenge. Here, a ternary GCF of reduced graphene.oxide (rGO), polydopamine (PDA) and multi-walled carbon nanotubes (MWCNTs) was developed. The.MWCNTs were modified by PDA to form PDA@MWCNTs which were then compounded with GO to.fabricate the rGO-PDA@MWCNT films by evaporation-induced assembly and chemical reduction. The.preparation was simple, cheap and environmentally-friendly. The PDA increased the dispersion of.MWCNTs in the rGO-PDA@MWCNT films, crosslinked the rGO sheets, and enhanced the entanglement of.MWCNTs and the interactions betweenMWCNTs and rGO sheets. Benefiting from the synergistic effect of.PDA and MWCNTs, the rGO-PDA@MWCNT films exhibited excellent integrated properties by increasing.strength, tensile fracture strain and toughness to 579 ± 35 MPa, 12.03 ± 0.56%, and 34.03 ± 1.60 MJ/m3,.which were 2.26, 2.02 and 4.94 times that of pure rGO films, respectively. The rGO-PDA@MWCNT films.also exhibited a high conductivity of 612 ± 68 S/cm and excellent structural stability under extreme.environments. These excellent integrated properties of the rGO-PDA@MWCNT films will promote their.applications in aerospace engineering, flexible electrical devices and artificial muscle.
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