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首页> 外文期刊>Journal of Applied Polymer Science >Surface modification of poly-L-lactide by photografting of hydrophilic polymers towards improving its hydrophilicity
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Surface modification of poly-L-lactide by photografting of hydrophilic polymers towards improving its hydrophilicity

机译：通过亲水性聚合物的光接枝以提高其亲水性来对聚L-丙交酯进行表面改性

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Poly-L-lactide (PLLA) has been used to prepare scaffolds to guide tissue regeneration in tissue engineering research. However, one of the limitations to the use of PLLA as an ideal biomaterial is its high hydrophobicity. To improve the hydrophilicity of PLLA, hydrophilic polymers were grafted onto PLLA membrane surfaces through the combination of photooxidization in hydrogen peroxide and subsequent ultraviolet (UV)-induced grafting copolymerization in the monomer solution. Three kinds of modified PLLA membranes (i.e., PLLA-g-polyhydroxyethyl methacrylate, PLLA-g-polyacrylamide, and PLLA-g-polymethacrylic acid) were obtained, resulting in the more wettable PLLA membranes. The occurrence of the grafting polymerization was confirmed by attenuated total reflectance infrared spectroscopy (ATR-IR) and X-ray photoelectron spectroscopy (XPS) analysis. Surface morphology of the modified PLLA membranes was studied by scan electronic microscopy (SEM). (C) 2002 Wiley Periodicals, Inc. [References: 24]
机译：聚L-丙交酯（PLLA）已用于制备支架，以指导组织工程研究中的组织再生。然而，使用PLLA作为理想的生物材料的限制之一是其高疏水性。为了提高PLLA的亲水性，通过将过氧化氢中的光氧化作用和随后在单体溶液中由紫外线（UV）诱导的接枝共聚相结合，将亲水性聚合物接枝到PLLA膜表面上。获得了三种改性的PLLA膜（即，PLLA-g-甲基丙烯酸羟乙酯，PLLA-g-聚丙烯酰胺和PLLA-g-聚甲基丙烯酸），从而得到了更具润湿性的PLLA膜。通过衰减全反射红外光谱（ATR-IR）和X射线光电子能谱（XPS）分析确认了接枝聚合的发生。通过扫描电子显微镜（SEM）研究了改性的PLLA膜的表面形态。 （C）2002 Wiley Periodicals，Inc. [参考：24]

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