Reactive TiO_(2) Nanoparticles Compatibilized PLLA/PBSU Blends:Fully Biodegradable Polymer Composites with Improved Physical,Antibacterial and Degradable Properties  

作　　者：Xiao-Ying Gu Ling-Min Hu Zhi-Ang Fu Heng-Ti Wang Yong-Jin Li 

机构地区：[1]College of Material,Chemistry and Chemical Engineering,Hangzhou Normal University,Hangzhou 311121,China

出　　处：《Chinese Journal of Polymer Science》2021年第12期1645-1656,共12页高分子科学（英文版）

基　　金：by the Major Project of Natural Science Foundation of Zhejiang Province of China(No.LD19E030001);the National Nature Science Foundation of China(No.51903071).

摘　　要：The fully biodegradable polymer blends remain challenges for the application due to their undesirable comprehensive performance.Herei n,remarkable combi nation of superior mechanical performa nee,bacterial resista nee,and con trollable degradability is realized in the biodegradable poly(L-lactide)/poly(butylene succinate)(PLLA/PBSU)blends by stabilizing the epoxide group modified titanium dioxide nan oparticles(m-TiO_(2))at the PLLA-PBSU in terface through reactive blending.The m-TiO_(2) can not only act as in terfacial compatibilizer but also play the role of photodegradation catalyst:on the one hand,binary grafted nanoparticles were in situ formed and stabilized at the interface to enhance the compatibility between polymer phases.As a consequence,the mechanical properties of the blend,such as the elongation at break,notched impact strength and tensile yield strength,were simultaneously improved.On the other hand,antibacterial and photocatalytic degradation performance of the composite films was synergistically improved.It was found that the m-TiO_(2 )incorporated PLLA/PBSU films exhibit more effective antibacterial activity than the neat PLLA/PBSU films.Moreover,the analysis of photodegradable properties revealed that that m-TiO_(2) nan oparticles could act as a photocatalyst to accelerate the photodegradati on rate of polymers.This study paves a new strategy to fabricate advaneed PLLA/PBSU blend materials with excellent mechanical performance,antibacterial and photocatalytic degradation performance,which enables the potential utilization of fully degradable polymers.

关 键 词：Reactive TiO_(2)nan oparticles PLLA/PBSU blend composites COMPATIBILIZATION Photodegradati on 

分 类 号：TQ317[化学工程—高聚物工业] TB332[一般工业技术—材料科学与工程]