碳纤维复合材料回收及利用现状

由于碳纤维复合材料具有的强度高、模量高及耐腐蚀性能好等特性,导致其废弃物的处理和利用存在很大难度,碳纤维复合材料废弃物对环境的污染已引起广泛关注。本文概述了碳纤维复合材料废弃物回收的预处理,化学回收、物理回收和能量回收技术,以及国内外碳纤维复合材料废弃物回收及利用现状,指出了碳纤维回收及利用不仅可以实现高价值材料的再利用,而且碳纤维复合材料部件回收及利用可大大减少能源消耗和环境污染。     

碳纤维鱼竿生产现状及回收技术现状

介绍了碳纤维鱼竿生产现状及竿胚的生产流程,统计了各个工序中边角料、废料等可回收数量;并介绍了采用的低成本弱氧化性混合气分解回收技术回收碳纤维的技术路线;对碳纤维复合材料回收再利用技术进行了展望。     

碳纤维增强树脂复合材料废弃物回收技术研究现状

随着碳纤维增强树脂复合材料(CFRP)市场需求量的大幅增加,大量CFRP废弃物的回收再利用问题严重制约了碳纤维产业的可持续发展,因此,发展切实可行的CFRP废弃物回收利用方法至关重要。简述了CFRP的发展现状以及大量CFRP废弃物所带来的严重环境问题和资源浪费,介绍了CFRP废弃物的各种回收技术,包括机械回收法、高温热解法、流化床热分解法、溶剂回收法等,总结了不同回收技术的回收原理、工艺流程、研究现状以及各自优缺点,并对CFRP回收再利用的未来发展方向进行了展望。     

一步法回收并改性碳纤维的方法

正本发明属于固体废弃物综合利用技术领域,具体涉及一种一步法回收并改性碳纤维的方法。本发明通过机械破碎的方法将聚合物碳纤维复合材料破碎成合适的大小,再将破碎后的聚合物碳纤维复合材料、溶剂和催化剂加入高压反应釜中,利用一定温度和压力的水分解碳纤维复合材料的聚合物基体,最终得到力学性能优异、表面接有-COOH和-OH等活性基团的回收碳纤维。本     

碳纤维复合材料回收再利用的研究进展

碳纤维复合材料质轻、比模量与比强度高，广泛应用于航空航天等领域。然而在极端环境下使用碳纤维复合材料会造成其报废与损伤，使得废弃物对资源与环境产生负担，无法满足国家提倡的节能减排的发展要求。从物理、化学、热回收等方法探讨碳纤维复合材料废弃物中碳纤维的回收再利用情况，为发展绿色可持续碳纤维提供更宽的思路。     

上海交大填补国内碳纤维复合材料废弃物回收空白

正随着碳纤维复合材料的广泛应用,对其尚具相当利用价值的废弃物如何回收,成为一项挑战。上海交通大学王新灵教授研究团队经过5年攻关,成功开发了拥有完全自主知识产权的碳纤维复合材料废弃物新型裂解回收技术和装备,具备国际水平的规模化生产能力,填补了国内该领域的空白。碳纤维(Carbon Fiber)是一种由碳元素组成的黑色特种无机高分子纤维。每100千克航空碳纤维复合材料废弃物中,就有大约60~70千克的碳纤维,这些碳纤维仍然具有极高的再利用价值,可用来重新制备高性能复合材料。然而,常用的碳纤维复合材料主要由碳纤维和热固性树脂复合而     

台湾永虹公开全球首套高效碳纤维复合材料再生系统

正碳纤维复合材料生产解决方案供应商永虹先进材料有限公司,除了提供碳纤维整线生产设备外,还与台湾地区航天业龙头厂汉翔连手推动复合材料回收再利用计划。其中,永虹负责开发回收再生技术,汉翔提供复合材料余、废料及制程开发建议。2018年12月7日,永虹正式公开亮相全球首套的高效碳纤复合材料再生系统,抢占市场。     

台湾永虹公开碳纤维复合材料再生系统

正碳纤维复合材料生产解决方案供应商永虹先进材料,除了提供碳纤维整线生产设备外,也与台湾地区航天业龙头厂汉翔,联手推动复合材料回收再利用计划。其中,永虹负责开发回收再生技术,汉翔提供复材余料、废料及工程开发建议。12月7日,永虹正式公开亮相全球首型的高效碳纤复合材料再生系统,抢占市场。     

环氧复合材料压力法降解及其纤维的回收利用

研究了压力法组合溶剂法一步降解环氧碳纤维复合材料的工艺,测试了降解产物成分与特性并探索了回收碳纤维再利用的可能性。利用红外光谱分析确定了其断键形式主要为醚键断裂,利用气相色谱-质谱联用分析确定了降解产物主要是丙烷和2-戊酮。利用扫描电子显微镜(SEM)表征了纤维表面树脂粘附少,再制备复合材料的界面结合良好。纤维力学性能测试确定了所回收的碳纤维仍具有良好的力学性能。复合材料力学性能测试确定了其性能损失小。研究表明,使用该方法降解效率高,回收纤维单丝拉伸强度保留率高,具有很好的运用前景。     

美复合材料回收技术中心与英ELG公司签署碳纤维回收合作备忘录

正美国复合材料回收技术研发中心(CRTC)日前与英国ELG碳纤维公司签署合作备忘录,将在碳纤维回收领域展开合作。根据签署的备忘录,ELG将利用其领先的热解工艺对碳纤维进行回收,然后双方将共同将其开发成高附加值的产品,保护环境并造福人类。"我们很高兴能与碳纤维回收领域的先进企业ELG达成此次合作。他们拥有先进的回收技术,能从复合材料制品中回收碳纤维,并且成本     

Recycling carbon fiber from composite waste and its reinforcing effect on polyvinylidene fluoride composite: Mechanical,morphology, and interface properties

Recycled carbon fiber (RCF) was reclaimed from thermoset composite waste and employed as reinforcement from 0 to 30 wt% to prepare polyvinylidene fluoride (PVDF)/RCF composite. Commercial virgin carbon fiber (VCF) was used as comparison. The surface morphology, chemistry, and tensile properties of carbon fibers were investigated by Scanning Electron Microscopy (SEM), X‐Ray Photoelectron Spectroscopy (XPS), and tensile test. Results showed that the roughness, O/C ratio and –COO content of RCF surface were significantly improved after recycling. In addition, the single fiber tensile strength and modulus of RCF was lower than that of VCF. The interfacial adhesion between RCF and PVDF was much stronger due to the high chemical activity and roughness over the RCF surface. Mechanical properties of composites were investigated by flexural test, impact test, and Dynamic Mechanical Analysis (DMA). It is found that the PVDF/RCF composite showed higher flexural properties, storage modulus, and lower impact strength, which indicated the strong interfacial adhesion, played an important role in reinforcing. The morphology of fracture further demonstrated the strong interface in PVDF/RCF composite. The fiber length distribution and crystallinity of composites were also evaluated to characterize the composites. The work develops potential for recycling and reuse of carbon fiber, and also expands the application of PVDF based composite. POLYM. COMPOS., 38:2544–2552, 2017. © 2015 Society of Plastics Engineers     

轻量化高性能碳纤维复合材料车体研发关键技术

简述了轨道交通领域碳纤维复合材料应用现状,从结构材料设计、整体结构设计、车体成型技术、构件连接技术、结构声学设计、缺陷检测技术等多个方面探讨复合材料整车车体研发的技术难点。在碳纤维复合材料车体研发的过程中,只有充分理解和实现复合材料的材料、设计、制造一体化,全面综合地考虑各种关键技术,才能获得高性能的碳纤维复合材料车体,并有效降低复合材料车体的成本;只有建立完整的复合材料车体设计、制造、验证技术规范和质量评价体系,碳纤维复合材料才能在轨道交通行业中得到推广应用。     

炭纤维/热解炭+Al2O3复合材料的微观结构研究

为提高炭／炭复合材料的隔热性能,设计出了Ａｌ２Ｏ３粉末和纤维＋炭布缠绕预制体结构。采用快速化学气相沉积新技术制备出了炭纤维／热解炭＋Ａｌ２Ｏ３复合材料,并采用ＳＥＭ分析、能谱分析及Ｘ射线衍射分析研究了其微观结构。实验结果表明,这种材料自表面到内部形成了有利于隔热的密度梯度,材料组织均匀,闭孔细小,分布合理,隔热性能良好     

Recycling of the fibrous fraction of reinforced thermoset composites

We investigate the feasibility of reusing short fibers recovered from recycled thermoset composites for the production of new composites. Glass fibers were recovered from glass‐polyester composites, and carbon and aramide fibers from epoxy based composites. From the different fractions obtained after grinding, a specific fibrous fraction was selected for reuse. This recycled fraction was first characterized in terms of length and residual matrix content, and then incorporated into virgin polymer matrices to prepare new thermoplastic composites. To evaluate the performance of these composites, tensile tests were initially carried out, and the results were compared with similar measurements performed on pristine composites containing short unused fibers of similar length. In most cases examined, recycling does not adversely affect the mechanical performance of the new composite. This overall behavior is explained in terms of fiber length preservation, fiber dispersion mechanism and fiber‐matrix adhesion.     

Circulating flow reactor for recycling of carbon fiber from carbon fiber reinforced epoxy composite

For the purpose of development of a chemical recycling process for carbon fiber from carbon fiber reinforced epoxy composite, a new chemical recycling system using nitric acid aqueous solution has been proposed. The recycling system is composed of hexahedral circulating flow reactor made of quartz, Teflon supporter, acid resistance pump and auxiliaries. Epoxy matrix in the composite was effectively decomposed by nitric acid aqueous solution in the circulating flow reactor and carbon fiber could be recycled without any tangle or disturbance. Optimum conditions for the recycling process have been experimentally established. Tensile strength loss of recycled carbon fiber and composition of liquid phase decomposition products were analyzed.     

基于RPM的炭/炭复合材料人工骨预制体成型技术研究

炭／炭复合材料是一种新型的炭纤维增强的以炭为基体的高性能复合材料，其增强相和基体都由碳元素构成，不仅具有炭材料固有的生物相容性，而且还具有纤维增强复合材料的高强度与高韧性，对其应用于人体组织材料进行了广泛的研究。通过应用RPM技术及快速模具，解决了复杂形状炭／炭复合材料难成型的问题，并对其在生物领域的应用进行了展望。     

三维编织碳纤维尼龙复合材料的探索性研究

本文论述了根据碱催化阴离子聚合原理、用液态原位聚合方法制备三维编织碳纤维尼龙复合材料的成型工艺过程,测试并分析了其力学性能及其成型过程中的主要影响因素.结果表明,该复合材料的性能明显优于长碳纤维尼龙复合材料.     

Comparison of mechanical performance and fracture behavior of gelatin composites reinforced with carbon fibers of different fiber architectures

Gelatin‐based composites reinforced, respectively, with continuous carbon fibers, short carbon fibers, plain woven carbon fibers, and carbon fiber felt were investigated. Tensile and shear strengths, and their changes with fiber volume fraction (V_f) of these four composites were compared. It was demonstrated that at all fiber levels, the composite containing continuous carbon fibers showed the largest strength, while the composite reinforced with carbon fiber felt exhibited the lowest strength of the four composites. The above results were analyzed by comparing the fracture surfaces of the four composites. SEM confirmed the great differences in fracture surfaces for composites of different fiber architectures. The presence of a large number of pores in the C_F/Gel composite was responsible for its lowest strength, and cracks within fiber tows caused the lower strength of the C_W/Gel composite when compared to its C_L/Gel counterpart. It was suggested that fiber architecture exerted a great effect on composite performance and the effect was dependent on the nature of the matrix material.     

三维编织碳纤维尼龙复合材料的研究

根据碱催化阴离子聚合原理，用液态原位聚合方法制备了尼龙／三维编织碳纤维复合材料（PA／C3D），介绍其成型工艺过程，测试并分析了PA／C3D复合材料的力学性能及影响因素。结果表明，PA／C3D复合材料具有比长碳纤维增强尼龙（PA／CL）复合材料高的冲击强度和剪切强度，其弯曲性能低于PA／CL复合材料。碳纤维空气氧化处理后制备的PA／C3D复合材料的弯曲强度、弯曲弹性模量及平面剪切强度均有所提高，但冲击强度下降。