基于琼脂糖的磁响应型光子晶体水凝胶的制备及性能研究  

Synthesis and Optical Properties of Magnetic Responsive Agarose Photonic Hydrogel

作　　者：张文莹[1] 蒋文凤 卢学刚[1] 梁工英[1] 

机构地区：[1]西安交通大学理学院,物质非平衡合成与调控教育部重点实验室,西安710049

出　　处：《光散射学报》2017年第4期314-319,共6页The Journal of Light Scattering

基　　金：国家自然科学基金(51172178)

摘　　要：本文通过将单分散Fe_3O_4胶体粒子分散嵌埋于琼脂糖水凝胶网络结构中,制备了一种新型磁响应光子晶体水凝胶,并对其光学性质进行了研究。首先通过水热法制备了由表面羧基修饰的Fe_3O_4胶体粒子,并将其分散于水中制成胶体溶液。将该胶体溶液与琼脂糖单体混合,通过交联聚合使之形成琼脂糖水凝胶。由于琼脂糖水凝胶较大的网络空间结构,使得Fe_3O_4胶体粒子仍能保持其可动性,在外加磁场作用下,处于水凝胶网络中的Fe_3O_4胶体粒子可以对磁场做出响应并形成晶态胶体阵列,且随着磁场强度的变化,凝胶的结构色也表现为连续可调的特性。这种结构色可动态调控的光子晶体水凝胶,为胶体光子晶体的实际应用提供可能。In this paper, a novel magnetic responsive photonic hydrogel was prepared by em- bedding monodisperse Fe3O4 colloidal particles into network of agarose matrix, and its optical properties was investigated. First, carboxyl decorated Fe3O4 colloidal particles were synthe- sized through a hydrothermal method. Then the Fe3O4 colloidal particles were dispersed in water to form homogeneous colloidal solution. After mixing the colloidal solution with agar- ose monomer and then complete cross-linking polymerization, a uniform composite agarose hydrogel containing Fe3O4 particles can be obtained. With large pore size of agarose gels, the Fe3O4 particles in agarose matrix are still movable and colloidal crystal arrays can be achieved under external magnetic field. Moreover, the structural color of the gel can be tuned continu- ously by changing the strength of magnetic field. As-prepared photonic hydrogels, with dy- namically tunable structural colors, provide great opportunities for applications of colloidal photonic crystals.

关 键 词：光子晶体 琼脂糖水凝胶 结构色 磁响应 FE3O4 

分 类 号：O482.54[一般工业技术—材料科学与工程]