Facile Interface Design Strategy for Improving the Uvioresistant and Self-Healing Properties of Poly(p-phenylene benzobisoxazole) Fibers
Facile Interface Design Strategy for Improving the Uvioresistant and Self-Healing Properties of Poly(p-phenylene benzobisoxazole) Fibers
复制标题
提高聚对亚苯基苯并二恶唑纤维抗紫外线和自修复性能的简便界面设计策略
DOI：
10.1021/acsami.9b11595
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发表时间：
2019
影响因子：
9.5
通讯作者：
Hu Zhen
中科院分区：
文献类型：
--
作者：
Yu Long;Lu Fei;Huang Xinghao;Liu Yingying;Li Meiyu;Pan Haoze;Wu Leiyu;Huang Yudong;Hu Zhen
石墨烯基同轴混杂纤维(CHF)具有典型的芯-鞘结构，由于其潜在的优异力学性能，近年来引起了人们的广泛关注。然而，将微米厚的石墨烯堆积结构直接引入到极惰性纤维表面，几乎没有负面影响的报道，仍然是一个巨大的挑战。在本工作中，开发了一种简单且经济的尺寸受限水热还原、静态吸附和热辅助收缩顺序处理策略来制备一维CHF。大规模还原氧化石墨烯-金属有机骨架(RGO-UIO-66)杂化层和聚对苯撑苯并双恶唑(PBO)纤维分别作为包套部分和核心部分，最终产物记为PGU-CHF。实验结果表明，与未老化的PBO纤维相比，热塑性聚氨酯单丝复合材料(PGU-CHF-TPU)在5个循环内具有良好且稳定的本征自愈效率(约85%)和优异的抗紫外线性能(提高128%)。此外，经过比较，目前报道的大多数文献中，PGU-CHF在96h的抗紫外线(UV)性能基本处于最佳水平。微米厚RGO堆叠结构的高近红外光热转换能力和稳定性，以及RGO-UIO-66杂化护层对紫外线的吸收、屏蔽衰减和反射的协同作用，分别是导致PGU-CHF良好的界面自愈效率和抗紫外线性能的原因。考虑到RGO和MOF的多样性和通用性，所提出的制备策略将使PBO光纤在光纤传感器和智能光纤等其他领域具有巨大的应用潜力。
Graphene-based coaxial hybrid fibers (CHFs) with a typical core–sheath structure have attracted extensive attention in recent years because of their potentially excellent mechanical performance. However, direct introduction of the micrometer-thick graphene stack structure on the extremely inert fiber surface with little negative effect has barely been reported so far and is still a great challenge. In the present work, a facile and cost-efficient dimensionally confined hydrothermal reduction, static adsorption, and thermal-assisted shrinkage sequential treatment strategy was developed to fabricate one-dimensional CHFs. The large-scale reduced graphene oxide–metal organic framework (RGO–UIO-66) hybrid layer and poly(p-phenylene benzobisoxazole) (PBO) fiber serve as the sheath part and core part, respectively, and the final product is denoted as PGU–CHFs. The experimental results confirmed that the prepared monofilament composite with thermoplastic polyurethane (PGU–CHF–TPU) exhibited an excellent and stable intrinsically self-healing efficiency (about 85%) over 5 cycles and an extraordinary uvioresistant performance (increased by 128%) compared to those of pristine PBO fibers after 288 h UV aging irradiation. Moreover, the anti-ultraviolet (UV) properties of PGU–CHFs at 96 h are basically at the optimum level among most of the reported literatures at present after comparison. The highly near-infrared photothermal conversion ability and stability of micrometer-thick RGO stack structure and the synergism of RGO–UIO-66 hybrid sheath layer including UV adsorption, shielding attenuation, and reflection are responsible for the satisfactorily interfacial self-healing efficiency and UV-resistance properties of PGU–CHFs, respectively. Considering the diversities and versatilities of RGO and MOFs, the proposed fabrication strategy will promisingly endow PBO fibers with great application potential in the other fields such as fiber-based sensors and smart fibers.