Cellulose fibre foam templated porous epoxy composites: Wetting matters

IF 8.1 2区材料科学 Q1 ENGINEERING, MANUFACTURING Composites Part A: Applied Science and Manufacturing Pub Date : 2024-09-05 DOI:10.1016/j.compositesa.2024.108461

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Abstract

Cellulose foams were used to produce porous epoxy-composites. The influence of fibre wetting by the resins on foam morphology and resulting compression properties was investigated. Impregnated foam morphology determined the composite structures and their mechanical properties. Fibre preforms of various densities (40–80 kg·m⁻³) were prepared by frothing surfactant stabilised fibre suspensions. The preforms, exhibiting compressive strengths of 0.02 MPa, were impregnated with three different resins (a lignin-based resin BLER/MA, and two commercial formulations, A/A and A/XB). Depending on the formation of closed- or open-cell structures in the cured foam composites, compressive strengths of up to 2 MPa (BLER/MA), 33 MPa (A/A), or 23 MPa (A/XB), and compressive moduli of up to 47 MPa (BLER/MA), 468 MPa (A/A), or 379 MPa (A/XB) were obtained. The surface area, fibre coverage homogeneity, and composite morphology were investigated in relation to wetting. A tool kit for fibre foam templated porous composite design is provided.

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纤维素纤维泡沫模板多孔环氧树脂复合材料：润湿问题

纤维素泡沫用于生产多孔环氧树脂复合材料。研究了树脂对纤维的润湿对泡沫形态和由此产生的压缩性能的影响。浸渍泡沫的形态决定了复合材料的结构及其机械性能。通过使表面活性剂稳定的纤维悬浮液起泡，制备了不同密度（40-80 kg-m-3）的纤维预型件。用三种不同的树脂（木质素基树脂 BLER/MA 和两种商业配方 A/A 和 A/XB）浸渍预型件，预型件的抗压强度为 0.02 兆帕。根据固化泡沫复合材料中闭孔或开孔结构的形成情况，抗压强度最高可达 2 兆帕（BLER/MA）、33 兆帕（A/A）或 23 兆帕（A/XB），压缩模量最高可达 47 兆帕（BLER/MA）、468 兆帕（A/A）或 379 兆帕（A/XB）。研究了与润湿有关的表面积、纤维覆盖均匀性和复合材料形态。为纤维泡沫模板多孔复合材料的设计提供了一个工具包。

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来源期刊

Composites Part A: Applied Science and Manufacturing 工程技术-材料科学：复合

CiteScore

15.20

自引率

5.70%

发文量

492

审稿时长

30 days

期刊介绍： Composites Part A: Applied Science and Manufacturing is a comprehensive journal that publishes original research papers, review articles, case studies, short communications, and letters covering various aspects of composite materials science and technology. This includes fibrous and particulate reinforcements in polymeric, metallic, and ceramic matrices, as well as 'natural' composites like wood and biological materials. The journal addresses topics such as properties, design, and manufacture of reinforcing fibers and particles, novel architectures and concepts, multifunctional composites, advancements in fabrication and processing, manufacturing science, process modeling, experimental mechanics, microstructural characterization, interfaces, prediction and measurement of mechanical, physical, and chemical behavior, and performance in service. Additionally, articles on economic and commercial aspects, design, and case studies are welcomed. All submissions undergo rigorous peer review to ensure they contribute significantly and innovatively, maintaining high standards for content and presentation. The editorial team aims to expedite the review process for prompt publication.