材料科学
复合材料
氧化剂
极限抗拉强度
抗压强度
复合数
甲醛
酚醛树脂
苯酚
纤维
钢筋
萃取(化学)
碳纤维
抗弯强度
化学
有机化学
色谱法
作者
Yuliya Kulikova,Natalia Sliusar,Vladimir Korotaev,Olga Babich,Viktoria Larina,Светлана Иванова
出处
期刊:Recycling
[MDPI AG]
日期:2022-04-02
卷期号:7 (2): 22-22
被引量:4
标识
DOI:10.3390/recycling7020022
摘要
The technical feasibility of the recycling of specific polymeric composite materials was evaluated. Two types of carbon composites, both with phenol-formaldehyde resin but with different reinforcement, were studied. It was discovered that the solvolysis with the oxidizing agents used in an acidic environment allowed for the achievement of a high-efficiency fiber extraction. The extracted secondary carbon fibers had a high degree of purity (95–99.5% of resin was removed). Fiber thickness slightly decreased during the process (on average, by 20%). The use of chopped secondary fibers (3–9 mm fiber length) for concrete reinforcement produced a positive effect. Hence, the compressive and bending strength of the concrete blocks were accordingly 1.5% and 16% higher in comparison with the control sample. The use of secondary carbon fabric for the production of composite materials a good result: the effective tensile strength of CFRP samples reinforced with recovered fabric is only lower by 4.5% in comparison with virgin fabric.
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