单宁酸
热重分析
阻燃剂
环氧树脂
热固性聚合物
材料科学
差示扫描量热法
化学工程
复合材料
化学
有机化学
物理
工程类
热力学
作者
F. Robert Gleuwitz,Alexander Battig,Bernhard Schartel
出处
期刊:ACS Sustainable Chemistry & Engineering
[American Chemical Society]
日期:2022-05-04
卷期号:10 (19): 6313-6324
被引量:5
标识
DOI:10.1021/acssuschemeng.2c00746
摘要
Material solutions that meet both circular bioeconomy policies and high technical requirements have become a matter of particular interest. In this work, a prospectively abundant protein-rich waste resource for the manufacturing of flame-retardant epoxy biocomposites, as well as for the synthesis of biobased flame retardants or adjuvants, is introduced. Different biomass fillers sourced from the cultivation of the mealworm beetle Tenebrio molitor are embedded in a bioepoxy resin cured with tannic acid and investigated regarding the fire performance of the thermosets. By means of spectroscopic and thermal analysis (attenuated total reflectance FTIR spectroscopy, thermogravimetric analysis-coupled FTIR spectroscopy, and differential scanning calorimetry), the influence of the biomass microparticles on the curing and thermal degradation behavior is evaluated. The final performance of the biocomposites is assessed based on fire testing methodology (limited oxygen index, UL-94, and cone calorimetry). Providing a high charring efficiency in the specific tannic acid-based epoxy matrix, the protein-rich adult beetle is further investigated in combination with commercial environmentally benign flame retardants in view of its potential as an adjuvant. The results highlight a char forming effect of nonvegan fillers in the presence of tannic acid, particularly during thermal decomposition, and point toward the potential of protein-based flame retardants from industrial insect rearing for future formulations.
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