本次工作，我们将纤维素纳米纤维（CNF）应用为导电碳纳米管的分散剂，并将其用于对水凝胶的增强和导电功能化改性，首次制备和报道了一种自愈合电磁屏蔽材料。我们通过CNF来辅助多壁碳纳米管(MWCNT)均匀分散在疏水缔合聚丙烯酰胺(PAM) 水凝胶中，从而制备得到一种具备优异力学，导电和电磁屏蔽性能的自愈合水凝胶。更有意思的是，在遭受外界破坏后，该复合水凝胶能在室温且无外界刺激的条件下自发快速地恢复其优异的力学、导电及电磁屏蔽性能（如图1和图2所示）。我们制备的这种复合水凝胶不仅具有与人体皮肤类似的力学和自愈合性能，还呈现出优于人体皮肤的性能（即优异的导电及电磁屏蔽性能），这使其在智能机器人、仿生皮肤和精密电子仪器防护等领域具备巨大的应用潜力。该成果发表在ACS Applied Materials& Interfaces上，并被评选为ACS Editors' ChoiceArticle，成为永久免费获取资源供读者免费获取和阅读。
Fig. 1 Digitalphotos and micrographs of self-healing process for PAMF0.3T1.(a) The initial PAMF0.3T1. (b) The PAMF0.3T1 was cut intotwo pieces. (c) The two pieces of the PAMF0.3T1 couldmerge into an integrated hydrogel after a week's self-healing process.
Fig. 2 (a) Self-healing PAMF0.3T1after mechanical damage which could sustain sizeable stretching strain withoutfracture. (b) Stress-strain curves of initial and healed PAMF0.3T1hydrogel. (c) Comparison of EMI SE of initial PAMF0.3T1,PAMF0.3T1-h-7 (self-healing for 7 days) and PAMF0.3T1-h-7after repeated bending 1000 times. (d) Comparison of tensile strength,electrical conductivity and EMI SE between PAMF0.3T1 andPAMF0.3T1-h-7.
论文信息：ACS AppliedMaterials & Interfaces, 2018, 10, 8245−8257.Publishedonline 30 January 2018, Published in print 7 March 2018.
原文链接：https://pubs.acs.org/doi/abs/10.1021/acsami.7b18700
资料提供：杨卫星