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首页> 外文期刊>Applied Surface Science >Enhanced Cell Affinity Of Poly(l-lactide) Film By Immobilizing Phosphonized Chitosan
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Enhanced Cell Affinity Of Poly(l-lactide) Film By Immobilizing Phosphonized Chitosan

机译：通过固定化膦酰壳聚糖提高聚（l-丙交酯）膜的细胞亲和力

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摘要

Graft polymerization of acrylic acid (AA) onto poly(L-lactide) (PLLA) film by UV irradiation was carried out to develop surfaces for N-methylene phosphonic chitosan (NMPC) immobilization. The properties of modified films were discussed by colorimetric method, attenuated total reflection-Fourier transform infrared spectroscopy (ATR-FTIR), contact angles, atomic force microscopy (AFM) and osteoblast incubation. The results showed that AA solution concentration and irradiation time had effect on the graft carboxyl densities. Comparing the ATR-FTIR images, two new peaks at 1561 cm~(-1) and 1632 cm~(-1) proved that NMPC was immobilized on the film surface successfully. The water contact-angles were decreased from 90 ± 5° to 37 ± 5° after modification. The AFM images indicated that the surface of the combined film was rougher than that of untreated film. The grafted film provided an excellent substrate for the growth of osteoblast.
机译：通过紫外线照射将丙烯酸（AA）接枝聚合到聚（L-丙交酯）（PLLA）膜上，以开发用于固定N-亚甲基膦酸壳聚糖（NMPC）的表面。通过比色法，衰减全反射-傅立叶变换红外光谱（ATR-FTIR），接触角，原子力显微镜（AFM）和成骨细胞孵育来讨论改性膜的性能。结果表明，AA溶液浓度和辐照时间对接枝羧基密度有影响。比较ATR-FTIR图像，在1561 cm〜（-1）和1632 cm〜（-1）出现了两个新峰，证明NMPC已成功固定在膜表面。改性后，水接触角从90±5°减小到37±5°。 AFM图像表明，结合膜的表面比未处理膜的表面更粗糙。接枝膜为成骨细胞的生长提供了极好的基质。

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