The study of Eucommia ulmoides rubber (EUR) has received increasing attention in the past few years. In this manuscript, we prepared a series of novel Eucommia ulmoides rubber foams with excellent shape memory behavior. We studied the mechanical, thermal and shape memory properties of foamed composites and attempted to establish the relationship between microstructure and macroscopic properties. The results showed that the mechanical properties increased greatly from 4.1 MPa to 7.8 MPa with the increase of cross-linking agent. However, the shape memory properties of foamed composites were closely related to the crosslinking degree. In these EUR foams, the cross-linked network worked as a fixed phase, while the crystalline regions acted as a reversible phase in the shape memory behavior.
Lin Xia,Fengcheng Yang,Hao Wu,Meng Zhang,Zhaoge Huang,Guixue Qiu,Zhenxiang Xin,Wenxin Fu
Multi-stimulus response materials are a kind of materials in the branch of intelligent materials, which provide diversified possibilities for the application of materials. A new series of thermal and water dual induced shape memory composites were designed and prepared by simple melt-blending method in this manuscript. These dual shape memory composites were mainly composed of two components, natural Eucommia ulmoides rubber (EUR) and polyethylene oxide (PEO). The shape memory behavior of the composites was investigated under three stimulation conditions: heat, water and both heat and water. We studied the mechanism of heat and water triggered the shape memory properties by considering the mechanical properties , water contact angle, water uptake, thermal properties, and other properties of the composites. We also proposed two schematic diagrams to explain the thermal and water dual induced shape memory processes of composites. Overall, all these EUR/PEO composites displayed both excellent mechanical properties and water/heat double-stimulus shape memory properties, which might provide a new way for the industrial production of smart shape memory materials.
危险品化学品经营许可证（带存储）