Poly (lactic acid)/titanium dioxide composites: Preparation and performance under ultraviolet irradiation

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• 作者：Changzhen Man^a ; ^{manchangzhen@163.com} ; Chunmei Zhang^a ; Yiming Liu^a ; Weiwei Wang^a ; Wuyang Ren^a ; Long Jiang^a ; Frederic Reisdorffer^b ; Thien Phap Nguyen^b ; Yi Dan^a ; ^{danyichenweiwei@163.com}
• 关键词：Poly (lactic acid) ; Rutile-titanium dioxide ; Anantase-titanium dioxide ; Organic-inorganic composite ; Ultraviolet shielding effect ; Ultraviolet degradation acceleration effect
• 刊名：Polymer Degradation and Stability
• 出版年：2012
• 期刊代码：85_01413910
• 类别：ms
• 出版时间：June, 2012
• 卷：97
• 期：6
• 页码：856-862
• 文件大小：1010 K

摘要

Poly (lactic acid)/anatase-titanium dioxide (PLA/A-TiO₂) and PLA/rutile-TiO₂ (PLA/R-TiO₂) composites were prepared by spin coating technique (thin film) and extrusion-injection processing (thick film), respectively. The ultraviolet (UV) photoresponse effects of the two oxide structures were investigated mainly by measuring the UV absorbance or mechanical properties. For the thin films, the UV absorbance results exhibit a UV shielding effect of R-TiO₂ and a degradation acceleration effect of A-TiO₂ when the particles are embedded in PLA matrix. But for the thick films, the mechanical property results only exhibit a UV shielding effect of both R-TiO₂ and A-TiO₂ particles and improve the anti-UV performance of PLA when the particles are encapsulated in PLA matrix.