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首页> 外文期刊>Chemical papers >Nanocomposites based on the cellulose extracted from the Amazon Peperomia pellucida and polyaniline derivatives: structural and thermal properties
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Nanocomposites based on the cellulose extracted from the Amazon Peperomia pellucida and polyaniline derivatives: structural and thermal properties

机译：基于提取的纤维素纳米复合材料从亚马逊豆瓣绿属方可成功聚苯胺衍生品:结构和热属性

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摘要

POMA/Cellulose and POEA/Cellulose nanocomposites were successfully synthesized based on interfacial polymerization over cellulose fibers extracted from the Amazon P. pellucida. The triclinic structure of poly(o-methoxyaniline) (POMA) and poly(o-ethoxyaniline) (POEA) was maintained after polymerization over cellulose fibers. However, possible chemical interactions between polymers and cellulose chains resulted in the increase of the average crystallite size, suggesting an oriented polymerization as well as the cellulose surface modification. The average crystallite size of POMA changed from (32 ± 2) ? (for pure POMA) to (41 ± 2) ? (for POMA in the nanocomposite form). The average crystallite size of POEA changed from (32 ± 2) ? (for pure POEA) to (44 ± 2) ? (for POEA in the nanocomposite form). Initially, the extracted cellulose presented average crystallite size of (29 ± 2) ?, while the cellulose crystallites in the nanocomposites were found around (59 ± 2) ? (POMA/Cellulose) and (92 ± 2) ? (POEA/Cellulose). The morphology of POMA/Cellulose was significantly different from that observed in the pure as-synthesized POMA: globular vesicular shape was formed during the polymerization over the cellulose surface. In the POEA/Cellulose nanocomposite, the cellulose nanofibrils were also completely recovered by POEA consisting of well-defined nanometric spheres. These results were correlated with the thermal stability of the developed nanocomposites by Thermogravimetric Analysis (TG/dTG). Thus, the interfacial synthesis of POMA and POEA over a cellulose matrix was reported here, contributing to a better understanding of the thermal, structural and morphological properties of these resulting nanocomposites.
机译：POMA /纤维素和POEA /纤维素纳米复合材料成功地合成了基于吗界面聚合在纤维素纤维从亚马逊中提取p方可成功。三斜晶系的结构的聚(o-methoxyaniline)(POMA)和聚(o-ethoxyaniline) (POEA)维护后对纤维素聚合纤维。聚合物和纤维素链导致之间平均晶粒度的增加,提出一个面向聚合以及纤维素表面改性。微晶的大小POMA从(32±2)?(纯POMA)(41±2)?纳米复合材料的形式)。POEA改变的(32±2)?(44±2)?形式)。提出了平均晶粒度(±2)29日?,而微晶纤维素的纳米复合材料(59±2)附近被发现?(POMA /纤维素)和(92±2)?POMA /纤维素的形态从观察到的明显不同纯as-synthesized POMA:球状水泡形状形成的聚合纤维素的表面。纳米复合材料,纤维素纺锤也完全恢复了POEA组成的定义良好的nanometric球体。相关的热稳定性由热重开发纳米复合材料分析(TG /壳体。POMA和POEA纤维素的合成矩阵是报道,导致了更好的理解热、结构和形态学特性的结果纳米复合材料。

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