三元共聚结构对智能形变聚酰亚胺性能的影响  

Influence of Terpolymer Structure on the Performance of Smart Deformable Polyimides

作　　者：柴兴鹏 孙雪洁 韦嘉[1] 俞燕蕾[1] CHAI Xingpeng;SUN Xuejie;WEI Jia;YU Yanlei(Department of Materials Science,Fudan University,Shanghai 200433,China)

机构地区：[1]复旦大学材料科学系,上海200433

出　　处：《功能高分子学报》2025年第2期122-130,共9页Journal of Functional Polymers

基　　金：国家自然科学基金面上项目(52073062)。

摘　　要：将形状记忆效应与光致形变性质相结合,使材料在按需塑造不同形状的同时具有光致形变的能力,能够扩展材料的多功能性。然而,在一种材料中同时获得互不干扰的光致形变和形状记忆性能仍然具有挑战。本研究采用三元共聚策略制备交联偶氮苯聚酰亚胺,交联结构赋予材料热致形状记忆效应,而侧链中的偶氮苯使其具有光致形变能力。通过引入含有短柔性链段的第二组分二胺单体4,4'-(1,3-丙二氧基)二苯胺(DA3 MG)调节了聚合物中偶氮苯的含量,确保聚酰亚胺在兼具光致形变和形状记忆性能的前提下进一步优化其综合性能,提升材料满足多样化需求的潜力。Combining the shape memory effect with photodeformation allows materials to have the ability to be shaped into different forms on demand and to deform under light,expanding the multifunctionality of the materials.However,achieving non-interfering photodeformation and shape memory properties in a single material remains challenging.In this study,we prepared cross-linked azobenzene polyimide using a terpolymerization strategy.The cross-linked structure of the polyimide provided a thermal shape memory effect,allowing it to be programmed into a temporary shape and return to its original shape upon exposure to heat.The azobenzene(Azo)groups in the side chains were employed to achieve reversible photodeformability.To optimize performance,we introduced a second diamine monomer,4,4'-(1,3-propanedioxy)dianiline(DA3 MG),to fine-tune the azobenzene content in the polymer.The ternary copolyimide exhibits high mechanical strength and excellent thermal stability.When the molar fraction of Azo in diamine monomer is 50%,the balance between light penetration depth and material modulus leads to significant bending angles upon light exposure.Finally,we successfully demonstrated the combination of shape memory and photodeformation properties of the terpolymer.The shape memory effect was used to program the shape of polymer film,giving the photo-responsive material different deformable structures.By applying light,the film was driven to undergo deformation,enabling the execution of actuation.After the actuation was completed,heat was applied to make the film return to its permanent shape.Programming the material's shape using the shape memory effect enables the photo-responsive polymer to have different deformable structures,while the reversible photodeformation allows for actuation,thus providing excellent shape manipulation capabilities.

关 键 词：光致形变 形状记忆效应 聚酰亚胺 智能材料 三元共聚 

分 类 号：TB34[一般工业技术—材料科学与工程]