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Preparation and characterization of a bio-based rigid plastic based on gelatinized starch cross-linked with furfural and formaldehyde
Industrial Crops and Products ( IF 5.9 ) Pub Date : 2022-06-21 , DOI: 10.1016/j.indcrop.2022.115246
Jun Zhang , Bowen Liu , Yunxia Zhou , Hisham Essawy , Jiankun Liang , Xiaojian Zhou , Guanben Du

The extensive use and rapid consumption of energy especially with the shortage of oil-derived resources pushed researchers to focus on developing more biomass-based plastics. The current article presents the possibility to undergo polycondensation of gelatinized starch and corn-derived furfural in presence of formaldehyde under acidic conditions to produce a thermoplastic material, starch–furanic resin. The structure of resulting product was studied intensively using solid-state 13C nuclear magnetic resonance (NMR) and Raman spectroscopy. The glass transitions, molecular weight, and thermal stability of the developed material were investigated with techniques such as differential scanning calorimetry (DSC), gel permeation chromatograph (GPC) and thermogravimetric analysis (TGA). In addition, the morphological features of the material’s surface were studied with scanning electron microscopy (SEM). Moreover, the related properties of the plastic were characterized by the measurements of Brinell hardness and compression resistance. The plastic shows a smooth appearance without crack and bubbles, and exhibited a glass transition temperature as high as 129 °C and a 12% weight loss temperature of 200 ℃ in nitrogen. All these results support that the condensation reactions between the gelatinized starch and aldehydes were more appropriate under acidic conditions to yield more complicated network structure with better homogeneous microstructure, which revealed superior and comparable results to that of phenol-formaldehyde plastics.



中文翻译:

基于糊化淀粉与糠醛和甲醛交联的生物基硬质塑料的制备与表征

能源的广泛使用和快速消耗,特别是在石油衍生资源短缺的情况下,促使研究人员专注于开发更多基于生物质的塑料。目前的文章提出了在酸性条件下在甲醛存在下进行糊化淀粉和玉米衍生的糠醛缩聚以生产热塑性材料淀粉-呋喃树脂的可能性。使用固态13 C 核磁共振 (NMR) 和拉曼光谱对所得产物的结构进行了深入研究. 采用差示扫描量热法 (DSC)、凝胶渗透色谱 (GPC) 和热重分析 (TGA) 等技术研究了开发材料的玻璃化转变、分子量和热稳定性。此外,用扫描电子显微镜(SEM)研究了材料表面的形态特征。此外,塑料的相关性能通过布氏硬度和抗压性的测量来表征。该塑料外观光滑,无裂纹和气泡,在氮气中玻璃化转变温度高达129℃,12%失重温度为200℃。

更新日期:2022-06-23
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