仿生磁响应4D智能水凝胶制备及其自驱动变形研究

Study on the Preparation and Self-driven Deformations of Bionic Magnetism Response 4D Intelligent Hydrogel

洋绣球种子芒在湿度条件下,通过弯曲与解弯曲变形特性实现自驱动播种功能。以洋绣球种子芒为生物模本,基于其变形部位的微观结构特性及自驱动变形机理,构建了溶胀度具有各向异性的仿生双层结构模型,指导仿生磁响应4D智能水凝胶的设计。以N,N-二甲基丙烯酰胺为单体,合成硅酸镁锂为交联剂,纳米木浆纤维素为增强相,四氧化三铁为磁响应粒子,由物理交联方法制备聚N,N-二甲基丙烯酰胺智能水凝胶为基本材料,通过"一步法"模具成型技术成功制备了具有溶胀、磁响应变形特性的仿生磁响应4D智能水凝胶,实现了力学强度与多形式智能响应的有效兼顾,为磁响应智能水凝胶瓶颈问题的解决提供了一种有效的仿生学新思路与新方法。

Hydrangea seed awn can realize self-driven seeding function by twisting spiral deformation and untwisting spiral deformation under the condition of humidity. The hydrangea seed awn is treated as bionic model. Based on the microstructure characteristics and self-driven mechanism of deformation parts, the bionic bilayer structure model with swelling anisotropy is built guide the design of bionic magnetism response 4 D intelligent hydrogel. The N,N-dimethylacrylamide, nanosized synthetic hectorite clay, nanofibrillated cellulose and ferroferric oxide are treated as monomer, crosslinking agent, reinforcement and magnetism response particle, respectively. The poly N,N-dimethylacrylamide hydrogel prepared via physical crosslinking is treated as basic material. The bionic bilayer magnetism response 4 D intelligent hydrogel prepared via one-step molding technology owned swelling and magnetism deformation properties, which realized the combination of mechanical strength and multiform intelligent responses and provided an effective bionic new thought and method for the solution of bottleneck of magnetism response intelligent hydrogels.