PDF(Pubmed)
Abstract：
Polyesters made from 2,5-furandicarboxylic acid (FDCA) have been in the spotlight due to their renewable origins, together with the promising thermal, mechanical, and/or barrier properties. Following the same trend, (nano)composite materials based on FDCA could also generate similar interest, especially because novel materials with enhanced or refined properties could be obtained. This paper presents a case study on the use of furanoate-based polyesters and bacterial cellulose to prepare nanocomposites, namely acetylated bacterial cellulose/poly(butylene 2,5-furandicarboxylate) and acetylated bacterial cellulose/poly(butylene 2,5-furandicarboxylate)-co-(butylene diglycolate)s. The balance between flexibility, prompted by the furanoate-diglycolate polymeric matrix; and the high strength prompted by the bacterial cellulose fibres, enabled the preparation of a wide range of new nanocomposite materials. The new nanocomposites had a glass transition between -25⁻46 °C and a melting temperature of 61⁻174 °C; and they were thermally stable up to 239⁻324 °C. Furthermore, these materials were highly reinforced materials with an enhanced Young\'s modulus (up to 1239 MPa) compared to their neat copolyester counterparts. This was associated with both the reinforcing action of the cellulose fibres and the degree of crystallinity of the nanocomposites. In terms of elongation at break, the nanocomposites prepared from copolyesters with higher amounts of diglycolate moieties displayed higher elongations due to the soft nature of these segments.
摘要：
由2,5-呋喃二羧酸（FDCA）制成的聚酯由于其可再生来源而备受关注，连同有前途的热，机械,和/或阻隔性能。遵循同样的趋势，基于FDCA的（纳米）复合材料也可以产生类似的兴趣，特别是因为可以获得具有增强或精制性能的新型材料。本文介绍了使用呋喃甲酸酯基聚酯和细菌纤维素制备纳米复合材料的案例研究，即乙酰化细菌纤维素/聚(2,5-呋喃二甲酸丁二醇酯)和乙酰化细菌纤维素/聚(2,5-呋喃二甲酸丁二醇酯)-共-(二乙醇酸丁二醇酯)。灵活性之间的平衡，由呋喃酸-二甘醇酸聚合物基质促进；和由细菌纤维素纤维促进的高强度，能够制备广泛的新型纳米复合材料。新型纳米复合材料的玻璃化转变温度在-25→46°C之间，熔融温度为61→174°C；它们在高达239→324°C的温度下是热稳定的。此外，这些材料是高度增强的材料，与它们的纯共聚酯对应物相比，具有增强的杨氏模量（高达1239MPa）。这与纤维素纤维的增强作用和纳米复合材料的结晶度有关。就断裂伸长率而言，由具有较高量的二甘醇酸部分的共聚酯制备的纳米复合材料由于这些链段的柔软性质而显示出更高的伸长率。
