A shape-memory poly(ε-caprolactone) hybridized TiO2/poly(L-lactide) composite with antibacterial properties

Release time:2023-12-18  Hits:

• Affiliation of Author(s):化学工程学院
• Journal:International Journal of Biological Macromolecules
• Funded by:省、市、自治区科技项目
• Key Words:shape memory composites
• Abstract:Organic-inorganic composites as an efficient strategy to upgrade the structural and functional properties of synthetic polymers are attracting extensive attentions. However, there are few studies on the shape memory (SM) behavior of organic-inorganic composites. In the work, poly(ε-caprolactone) hybridized TiO2 nanomaterial (PCLTiO2) is made as the switching phase and integrated into poly (L-lactide) (PLLA) to construct an SM composite. PCL-TiO2/PLLA shows “sea-island” structure and better interfacial adhesion than PCL/PLLA, which facilitates the transmission of elastic power between the switching phase and the fixing phase. PCL-TiO2 as switching phase exhibits lower enthalpy at 57 ◦C than PCL, and PCL-TiO2 also acts as “heat dispersion pump station”, which builds a dynamically responsive system and initiates shape change. The shape fixing and recovery ratio of PCLTiO2/PLLA are 93.9 % and 94.4 %, respectively, and go back to the original shape within 15 s at 57 ◦C. At the same time, PCL-TiO2 endows SMP with good antibacterial properties. Then this work provides a well-placed way for developing SM materials with structure-function integration.
• Co-author:胡晓红,宋晓峰
• First Author:songxiaofeng
• Indexed by:Journal paper
• Volume:253
• Page Number:1
• Translation or Not:no
• Date of Publication:2023-08-27