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首页> 外文期刊>Journal of biomedical materials research, Part A >Simple model for hydrolytic degradation of poly(lactic acid)/poly(ethylene oxide)/carbon nanotubes nanobiosensor in neutral phosphate‐buffered saline solution
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Simple model for hydrolytic degradation of poly(lactic acid)/poly(ethylene oxide)/carbon nanotubes nanobiosensor in neutral phosphate‐buffered saline solution

机译：磷酸盐缓冲盐水溶液中聚（乳酸）/聚（环氧乙烷）/聚（环氧乙烷）/碳纳米管纳米纤维料中的水解降解的简单模型

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摘要

Abstract In this study, the hydrolytic degradation of poly(lactic acid) (PLA)/poly(ethylene oxide) (PEO) blend and PLA/PEO/carbon nanotubes (CNTs) nanobiosensors in neutral phosphate‐buffered saline (PBS) solution was investigated by experimental and theoretical approaches. A simple model was developed to estimate the degradation fraction by applying the average degradation rate ( K ) and time exponent. The predictions of the developed model were compared to the experimental results. Moreover, CNT concentration, CNT size, sample thickness, diffusion coefficient, and concentration of the PEO phase influenced the K value. The impacts of the parameters on the degradation rate were studied to confirm the developed equation. All samples were rapidly degraded during the first week, while the degradation slowly progressed in the following weeks. The experimental and theoretical results demonstrate that CNTs quicken the degradation of samples. The degradation fraction of a nanobiosensor depends directly on the values of K and the time exponent. Furthermore, a high concentration of PEO, small thickness of the sample, high concentration of thin CNTs, and high diffusion coefficient desirably improve the degradation rate.
机译：摘要在本研究中，研究了中性磷酸盐缓冲盐水（PBS）溶液中的聚（乳酸）（PLA）/聚（环氧乙烷）（氧化物）（PEO）（PEO）共混物（PEO）纳米极高（CNT）纳米氧化物（CNT）纳米氧化物（PBS）纳米溶液的水解降解通过实验和理论方法。开发了一种简单的模型来通过施加平均劣化率（k）和时间指数来估计降解分数。将开发模型的预测与实验结果进行了比较。此外，CNT浓度，CNT尺寸，样品厚度，扩散系数和PEO相位的浓度影响了K值。研究了参数对降解率的影响，以确认所发达的等式。在第一周期间，所有样品迅速降解，而降解在接下来的几周内缓慢进展。实验和理论结果表明，CNT加快样品的降解。纳米极细管的降解级分直接取决于K和时间指数的值。此外，高浓度的PEO，小厚度的样品，高浓度的薄CNT和高扩散系数理想地提高降解速率。

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