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首页> 外文期刊>Journal of Polymers and the Environment >Novative Biomaterials Based on Chitosan and Poly (ε-Caprolactone): Elaboration of Porous Structures
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Novative Biomaterials Based on Chitosan and Poly (ε-Caprolactone): Elaboration of Porous Structures

机译：基于壳聚糖和聚（ε-己内酯）的新型生物材料：多孔结构的阐述

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摘要

The swelling capability of chitosan was explored in order to use water both, as volatile plasticizer and as pore-forming agent. Chitosan powder was swelled in acidic aqueous solution and melt blended with poly(￡-caprolactone) (PCL). After stabilization at 57% RH and 25 °C, samples suffered a water mass loss of around 30 wt% without dimensions varia tion. Despite the low miscibility of these biopolymers, quite homogeneous dispersion of chitosan within the polyester matrix was obtained. Some interactions between both bio polymers could be observed. To obtain chitosan phase with a thermoplastic-like behaviour, the plasticization effect was also studied by the addition of 25 wt% glycerol as non volatile plasticizer. The equilibrium moisture content of samples increased with the incorporation of glycerol due to its hydro philic nature. Morphology, thermal and mechanical properties of the blends were determined after stabilization. The prepa ration of rich PCL blends allowed the formation of macropo rous structures since samples were not contracted after water loss and stabilization. These biomaterials with such a porous structure could be used for biomedical applications.
机译：为了同时使用水作为挥发性增塑剂和成孔剂，探索了壳聚糖的溶胀能力。将壳聚糖粉末在酸性水溶液中溶胀，并与聚（ε-己内酯）（PCL）熔融共混。在57％RH和25°C下稳定后，样品的水量损失约为30 wt％，而尺寸没有变化。尽管这些生物聚合物具有低混溶性，但仍获得了壳聚糖在聚酯基质中的相当均匀的分散。可以观察到两种生物聚合物之间的某些相互作用。为了获得具有热塑性特性的壳聚糖相，还通过添加25 wt％甘油作为非挥发性增塑剂来研究增塑效果。由于甘油的亲水性，样品的平衡水分含量随甘油的加入而增加。稳定后确定混合物的形态，热和机械性能。富PCL共混物的制备允许形成大孔结构，因为样品在失水和稳定后不会收缩。这些具有这种多孔结构的生物材料可以用于生物医学应用。

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