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首页> 外文期刊>Journal of Applied Polymer Science >Preparation and characterization of electrospun PLAanocrystalline cellulose-based composites
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Preparation and characterization of electrospun PLAanocrystalline cellulose-based composites

机译：电纺PLA /纳米晶纤维素基复合材料的制备与表征

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Biodegradable nanocomposites of Nanocrystalline Cellulose (NCC) and electrospun poly-(lactic acid) were prepared via a new mixing technique. Dispersion of hydrophilic NCC in hydrophobic PLA was improved through aqueous mixing and freeze drying of perfectly suspended NCC with PLA nanofibers. Freeze drying produced aerogels with good mechanical integrity. The aerogels were further processed via hot pressing. Resulting composites displayed an improvement in mechanical properties, which was greatest at temperatures below the glass transition temperature of PLA. The optimum compositions were found to be in the 0.5-3% NCC (by weight) range. Experiments performed also showed that due to electrospinning, the crystallinity of the PLA slightly increased and this is accompanied by a decrease in its glass transition temperature. Furthermore, adding NCC to the electrospun PLA matrix did not alter the crystallinity of the final composite. The composites investigated proved their potential to be used in packaging and tissue engineering applications.
机译：通过一种新的混合技​​术制备了可生物降解的纳米晶纤维素（NCC）和电纺聚（乳酸）纳米复合材料。通过水性混合和用PLA纳米纤维完全悬浮的NCC冷冻干燥，可以改善亲水性NCC在疏水性PLA中的分散性。冷冻干燥制得的气凝胶具有良好的机械完整性。气凝胶通过热压进一步加工。所得的复合材料显示出机械性能的改善，这在低于PLA的玻璃化转变温度的温度下最大。发现最佳组成在0.5-3％NCC（重量）范围内。进行的实验还表明，由于静电纺丝，PLA的结晶度略有增加，并且伴随其玻璃化转变温度的降低。此外，将NCC添加到电纺PLA基质中不会改变最终复合材料的结晶度。研究的复合材料证明了其在包装和组织工程应用中的潜力。

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