Morphology, thermal and barrier properties of biodegradable films of poly (3-hydroxybutyrate-co-3-hydroxyvalerate) containing cellulose nanocrystals
Morphology, thermal and barrier properties of biodegradable films of poly (3-hydroxybutyrate-co-3-hydroxyvalerate) containing cellulose nanocrystals
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DOI：
10.1016/j.compositesa.2016.11.011
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发表时间：
2017-02-01
影响因子：
8.7
通讯作者：
Bouza, Rebeca
中科院分区：
文献类型：
--
作者：
Malmir, Sara;Montero, Belen;Bouza, Rebeca
采用溶剂浇铸法制备了含纤维素纳米晶的3-羟基丁酸-3-羟基戊酸共聚物生物降解膜。DSC和POM测试证实了纤维素纳米粒子的成核作用，而WAXS图谱显示生物纳米复合材料的结晶结构没有改变。POM图像显示，与纯聚合物相比，在具有CNC的样品中以更高的速率和数量形成更小的球晶。TEM图像表明，CNC纳米粒子在膜中分散良好，高达4 wt.%在CNC。SEM结果显示，添加高达4 wt.%的CNC时，基质的孔隙率显著降低。在AFM图像中观察到更多的表面粗糙度的生物纳米复合材料相比，未填充的矩阵。此外，具有4 wt.%的CNC表现出更好的对水蒸气和氧气的阻隔性能，比纯PHBV高出约四倍。这些可生物降解的纳米复合材料可能是合成塑料包装材料的良好替代品。(C)2016爱思唯尔有限公司版权所有。
Solvent casting method was used to prepare biodegradable films of poly (3-hydroxybutyrate-co-3-hydro xyvalerate) with cellulose nanocrystals (CNC). Nucleating effect of cellulose nanoparticles was confirmed with DSC and POM tests while WAXS patterns showed that the crystalline structure of bionanocomposites was not changed. POM images showed that smaller spherulites were formed with higher rate and quantity in the samples with CNC compared to neat polymer. TEM images illustrated that CNC nanoparticles were well dispersed in the films up to 4 wt.% of CNC. SEM results exhibited significant reduction in the porosity of the matrix with addition of CNC up to 4 wt.%. More surface roughness for bionanocomposites was observed in AFM images compared to unfilled matrix. Moreover, nanocomposites with 4 wt.% of CNC exhibited better barrier properties against water vapor and oxygen up to approximately four times more than neat PHBV. These biodegradable nanocomposites could be a good alternative for synthetic plastic packaging materials. (C) 2016 Elsevier Ltd. All rights reserved.