Chinese invention patent: Recyclable photo-induced deformation liquid crystal macromolecular material and preparation method thereof

Inventor: Yanlei Yu, Li Lin, Ruoyuan Yin, Yuanyuan Zhang

Applicant: Fudan University

Application No.: 200810032771.3

Abstract:

The invention belongs to the technical field of liquid crystal polymer material, concretely relates to a reusable liquid crystal polymer material with a photo-induced deformation and a preparation method. The chemical construction of the liquid crystal material is that the trunk chain is an acrylic acid type polymer chain, and the lateral chain contains part or all photo-responsive radicals, and partial crosslinking is carried out via hydrogen-bond action groups. One or a plurality of acrylic acid type ramifications are used as monomer, firstly non-crosslinking acrylic acid type liquid crystalline polymer is prepared by a radical polymerization, secondly the liquid crystal polymer material is prepared by a self crosslinking of the hydrogen-bond groups or a cross bonding of the additional crosslinking agent containing two-hydrogen-bond groups. The preparation method solves the problem that the former liquid crystal polymer material crosslinked with covalent bonds is difficult to recycle after molding, processing and use. The preparation method for the reusable liquid crystal polymer material with a photo-induced deformation is characterized in that the material shows a photo-induced deformation under the action of ultraviolet light, but can revert to the original even state under a thermal effect or a visible light effect, so the deformation process is reversible; the reusable liquid crystal polymer material can be used in the study of drive and artificial muscle.