用CeCl3修改的玄武岩纤维/环氧树脂复合材料的高热衰老研究
Chong Li1, Longwang Zhang2, Haoyu Wang2
1College of Mechanical and Electrical Engineering, Harbin Engineering University, Harbin 150001, China.
Polymers
|March 28, 2024
概括
玄武岩纤维 (BFs) 的稀土改性增强了玄武岩纤维/环氧树脂复合材料 (BF/ERCs) 对抗热水衰老的耐用性. 用化 (CeCl3) 进行表面处理,最大限度地减少了水的吸收,并最大限度地保持了机械性能.
科学领域:
- 材料科学 材料科学 材料科学
- 聚合物科学 聚合物科学
- 复合材料 复合材料 复合材料
背景情况:
- 岩纤维 (BFs) 越来越多地用于纤维增强复合材料,因为它们的优良性能和环保考虑.
- 水热老化对玄武纤维/环氧树脂复合材料 (BF/ERCs) 的长期耐用性和性能产生重大影响.
- 增强纤维的表面修改是改善复合材料在环境压力下的性能的一个关键策略.
研究的目的:
- 研究稀土 (化,CeCl3) 表面修饰对玄武岩纤维 (BFs) 的影响.
- 为了评估CeCl3度对BF/ERCs的热水衰老阻力的影响.
- 分析经过湿热老化后修改的BF/ERC密度,机械性能和化学特征的变化.
主要方法:
- 使用不同度的CeCl3溶液对BF表面进行修改.
- 在BF/ERC的高热老化.
- 使用重量方法分析吸水率.
- 机械性能的评估,包括拉伸,曲和层间剪切强度 (ILSS).
- 使用扫描电子显微镜 (SEM) 和富里埃变换红外光谱 (FT-IR) 的微结构和化学分析.
主要成果:
- 当BF/ERC用0.5重量%的CeCl3.3处理时,其吸水率呈现最低值.
- 拉伸强度,曲强度和BF/ERC的ILSS的保留率在经过最佳Ce修改的湿热老化后达到最大值.
- 由于表面修改,SEM和FT-IR分析证实了纤维矩阵接口粘附和化学结合的变化.
结论:
- 稀土 (CeCl3) 表面修改有效地提高了BF/ERCs的热水衰老抵抗力.
- 优化的CeCl3度 (0.5重量%) 显著降低了水的吸收,并改善了BF/ERCs的机械性质保留.
- 该研究展示了一种可行的方法,用于提高基岩纤维复合材料的耐用性,用于要求高的应用.
相关概念视频
Hydration of Cement
230
Hydration of cement is a chemical reaction between cement particles and water. This process occurs primarily through two mechanisms: through-solution and topochemical. In the through-solution process, anhydrous compounds dissolve into their constituents, hydrates form in the solution, and then precipitate from the supersaturated solution. The topochemical process involves solid-state reactions at the cement particle surface. The through-solution process dominates the topochemical process at the...
230
Waterproofing and Anti-Bacterial Admixtures in Concrete
78
Concrete's susceptibility to water absorption is due to the capillary action within the pores of its hydrated cement paste. This action draws water in, creating the need for waterproofing admixtures to prevent such penetration. The efficacy of these admixtures is contingent upon the water pressure, with variations arising from different conditions such as rain, capillary rise, or hydrostatic pressure in structures intended to hold water.
Waterproofing admixtures render concrete hydrophobic,...
Waterproofing admixtures render concrete hydrophobic,...
78
Strength and Heat of Hydration
236
The hydration of cement is an exothermic reaction in which heat is generated as cement hydrates. This heat of hydration is critical to cement's strength development. The rate at which this heat is generated affects the temperature rise, with a majority of the heat being released early in the hydration process, half within the first three days, and about 75% within the first week.
The heat of hydration for each cement compound is significant; for instance, tricalcium aluminate (C3A) and...
The heat of hydration for each cement compound is significant; for instance, tricalcium aluminate (C3A) and...
236
Porosity in Cement Paste
131
The porosity of concrete is a measure of the void spaces within its structure. These spaces impact its strength and durability significantly. When water and cement interact, a chemical reaction called hydration creates a semi-solid paste. This paste includes combined water, making up approximately 23% of the cement's dry mass, and gel water, which fills minuscule voids known as gel pores, accounting for about 28% of the cement gel volume.
The balance of water to cement in the mix is...
The balance of water to cement in the mix is...
131
Fiber Reinforced Concrete
75
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...
75
Drying Shrinkage
78
When hardened concrete is exposed to air with a relative humidity of less than 100 percent, it begins to lose the free water within its capillaries. As this water evaporates, the water initially adsorbed onto the calcium silicate hydrates migrates towards these now empty spaces and eventually evaporates as well. Over time, as more water leaves, the volume of the concrete decreases, a phenomenon known as drying shrinkage.
A portion of this drying shrinkage can be reversed; if the concrete is...
A portion of this drying shrinkage can be reversed; if the concrete is...
78


