光致相变型偶氮苯基共聚物的制备及在可逆胶黏剂领域的应用

Preparation of Photoconvertible Phase Change Azo-Phenyl Copolymers and Application in the Field of Reversible Adhesives

光致可逆胶黏剂的设计和开发,在一定程度上解决了传统胶黏剂在分离、回收和修复粘接表面等方面存在的问题。文中设计并合成了一种具有光致相态转换性能的偶氮苯基共聚物(PNY-Azo),其反式构象(固态)和顺式构象(液态)在黏附强度上表现出较大差异,实现了对黏附基材的光控黏附和剥离,可应用于制备光致可逆胶黏剂。通过在共聚物侧链上增加氧原子数量,以此增强了共聚物分子链间的超分子作用(氢键作用)以及共聚物的链间缠结性能,从而有效地提高了PNY-Azo的黏结强度,其反式构象状态下黏结强度最高可达4.59 MPa。

The design and synthesis of photo-induced reversible adhesives are considered to be the solution to the problems of traditional adhesives in separating,recycling and repairing.An azophenyl copolymer(PNY-Azo)with photo induced phase change property was designed and synthesized.The PNY-Azo performs great adhesion strength difference between trans conformation(solid state)and cis conformation(liquid state),which is suitable for photo-induced reversible adhesives application due to the reversible photo-induced bonding/debonding process between two substrates.By increasing the number of oxygen atom on the side chains of the copolymer,the supramolecular interaction(H bond)between the copolymer molecular chains and entanglement of copolymer chains is improved,which can enhance the adhesion strength(up to 4.59 MPa)of trans conformation PNY-Azo effectively.