Herein, a fast water responsive shape memory polymer composites based on hydroxyethyl cellulose (HEC) has been fabricated by crosslinking with graphene oxide (GO) and citric acid (CA). The swelling behavior, mechanical properties, micro-topography, thermal stability, as well as water and moisture induced shape memory performance of this composite were all fully investigated to demonstrate its functions. After crosslinking with GO and CA, the composite exhibited excellent mechanical properties with tensile strength over 100 MPa, which was nearly 4 times higher than pure HEC. Moreover, the pre-deformed composite was able to fully recover to its original shape in aqueous environment, which not only quickly happened in water (14 s), but also occurred in wet air with relative humidity about 70 within only 5 min. With such outstanding properties, we envisage that this composite could play a significant role in developing new generations of water responsive sensors, actuators and biomedical devices.

本文中，已经通过与氧化石墨烯（GO）和柠檬酸（CA）交联来制备基于羟乙基纤维素（HEC）的快速水响应性形状记忆聚合物复合材料。对该复合材料的膨胀行为，力学性能，微观形貌，热稳定性以及水和水分引起的形状记忆性能进行了充分研究，以证明其功能。与GO和CA交联后，该复合材料表现出优异的机械性能，拉伸强度超过100 MPa，是纯HEC的近4倍。此外，预变形的复合材料能够在水性环境中完全恢复其原始形状，不仅在水中（14 s）迅速发生，而且在5分钟内相对湿度约为70的湿空气中也发生了。凭借如此出色的性能，