纤维增强聚复合材料的机械性能和可回收性
Eloise K Billington1,2, Theona Şucu1,2, Michael P Shaver1,2
1Department of Materials, University of Manchester, Oxford Road, Manchester M13 9PL, U.K.
ACS sustainable chemistry & engineering
|July 5, 2024
概括
使用生物基,可降解的聚合物开发可持续的纤维增强聚合物复合材料 (FRP) 允许矩阵分解和纤维再利用. 这些新型FRP的机械性能与传统的高性能材料相美.
科学领域:
- 材料科学 材料科学 材料科学
- 聚合物化学 聚合物化学
- 可持续工程 可持续工程
背景情况:
- 传统的纤维增强聚合物复合材料 (FRP) 依赖于可回收性差的石油基矩阵.
- 纤维增强器通常来自不可再生资源,涉及能源密集型制造.
- 开发可回收或可降解的FRP对于环境可持续性和资源保护至关重要.
研究的目的:
- 创建可持续的FRP,使用生物基,可降解和可再加工的聚矩阵.
- 证明这些新型FRP的纤维增强材料的回收和再利用.
- 研究各种因素对开发的FRP机械性能的影响.
主要方法:
- 生物衍生周期性 (l-乳酸, δ-瓦莱洛拉克, ε-罗拉克) 与 bis- 1,3-二索兰-4- 一) 交叉连接器的共聚合,形成聚网.
- 将这些聚网纳入FRP.
- 矩阵的降解研究和机械性能测试 (拉伸强度,模量).
主要成果:
- 开发的聚矩阵可降解为葡萄酸和寡合物,促进纤维回收和重复使用.
- 由此产生的FRP具有令人印象深刻的机械性能,抗拉强度高达202MPa,Young的模块高达25GPa.
- 该研究探讨了共纳体结构,催化剂,强化类型和布置方法对FRP性能的影响.
结论:
- 可持续的FRP可以使用生物基,可降解的聚基基材进行制造.
- 这些新型FRP为传统复合材料提供了可行的替代品,具有可比的机械性能.
- 矩阵的可降解性使有价值的纤维增强剂能够有效地回收和重复使用,从而促进材料科学中的循环经济.
相关概念视频
01:22Fiber Reinforced Concrete
73
Fiber-reinforced concrete significantly enhances the structural and nonstructural properties of traditional concrete by incorporating fibers like steel, glass, and polymers. These fibers, varying from natural ones such as sisal and cellulose to manufactured ones like polypropylene and Kevlar, are mixed into hydraulic cement with aggregates. Steel fibers, often preferred for their robustness, contribute to improved ductility, toughness, and post-cracking performance. The concrete is classified...
73
01:20Types of Step-Growth Polymers: Polyesters
2.2K
The introduction of polyesters has brought major development to the textile industry. The wrinkle-free behavior of polyester blends has eliminated the need for starching and ironing clothes.
Polyesters are commonly prepared from terephthalic acid and ethylene glycol; the crude product is known as poly(ethylene terephthalate) or PET. However, polyesters are synthesized industrially by transesterification of dimethyl terephthalate with ethylene glycol at 150 °C. The two reactants and the...
Polyesters are commonly prepared from terephthalic acid and ethylene glycol; the crude product is known as poly(ethylene terephthalate) or PET. However, polyesters are synthesized industrially by transesterification of dimethyl terephthalate with ethylene glycol at 150 °C. The two reactants and the...
2.2K
01:25Reinforcements in Concrete
82
Reinforced concrete is a composite material used extensively in construction, combining the compressive strength of concrete with the tensile strength of steel. This synergy is essential as concrete, while excellent at resisting compression, is weak under tension. Steel bars, or rebars, are embedded in the concrete to handle these tensile forces. The choice of steel is strategic; it shares a similar coefficient of thermal expansion with concrete, which ensures uniformity in response to...
82
01:21Plastic Behavior
196
A material's elastic behavior is characterized by the disappearance of stress once the load is removed, allowing the material to return to its original state. However, when stress surpasses the yield point, yielding commences, marking the onset of plastic deformation or permanent set. This change from elastic to plastic behavior is influenced by the peak stress value and the duration before the load is removed. An intriguing observation occurs when a specimen is loaded, unloaded, and...
196
01:14Polymer Classification: Architecture
2.7K
Polymers are classified as linear or branched on the basis of their chain architecture. The polymer chains in linear polymers have a long chain-like structure with minimal to no branching at all. Even if a polymer features large substituent groups on the monomer, which appear as branches to the skeleton, it is not considered a branched polymer. A branched polymer contains secondary polymer chains that arise from the main polymer chain. The branching occurs when the polymer growth shifts from...
2.7K