1、Study on Water and Salt Resistance of Waste Glass Asphalt Mixture
Considering the detrimental effects of water-salt environments on the performance of waste glass asphalt mixtures, a silane coupling agent (SCA) was used to modify the surface of waste glass aggregate (WGA). Based on this modification, the dynamic changes in freeze–thaw damage, structural characteristics, and WGA’s resistance to water and salt erosion were quantified through semi-circular ...
2、Enhancing water resistance and stability of CFRP/concrete interfaces
Enhancing water resistance and stability of CFRP/concrete interfaces with silane coupling agents: Insights from nanoscale investigations - ScienceDirect
3、Limitless silanes
Coupling agent Silane coupling agents are silicon-based chemicals that contain two types of reactivity – inorganic and organic in the same molecule.
Enhancing water resistance and stability of CFRP/concrete
The research highlights the protective effect of silane coupling agents on the C-S-H gel, promoting better bonding and reducing atomic diffusion on the surface. The findings provide a theoretical basis for enhancing the durability of CFRP/concrete structures in the hydrothermal environment.
Improving the Mechanical Properties and Ultraviolet Aging Resistance of
Enhanced Mechanical, Thermal, Water and UV Aging Resistance Properties of Bamboo Fiber/HDPE Composites Through Silane Coupling Agent Modified Nano-SiO Formation of Silica Nanolayer on Titania Surface by Photocatalytic Reaction
Varieties and properties of common silane coupling agents
When this silane coupling agent is used in both dry and wet conditions, the flexural and tensile strength of glass fiber reinforced thermoplastics, polyamides, polyesters and polycarbonates increases before and after immersion in water.
Silane coupling agent
However, the introduction of silane coupling agents often leads to a decline in mechanical properties [24], creating a trade-off between water resistance improvement and mechanical performance.
Silane Coupling Agent Details
Silane coupling agents improve dispersion during mixing of resins and fillers, and improve the mechanical strength, water and heat resistance, transparency, adhesion and other properties of the composite materials. Silane coupling agents are also highly effective in improving the chemical bonding of heat-cure resins and their compatibility with polymers.
Silane Coupling Agents
This suggests, however, that methods of improving bond retention to glass will also improve the water resistance of bonds to metals. of standard coupling agents with a hydrophobic silane or one Modification with extra siloxane cross-linking have improved the water resistance of bonds to glass and metals another hundredfold over that obtained ...
Silane coupling agent
标题 Silane coupling agent-modified environmentally friendly waterborne polyurethane with excellent mechanical properties and water resistance 具有优异力学性能和耐水性的硅烷偶联剂改性环保型水性聚氨酯 相关领域 环境友好型 材料科学 聚氨酯 硅烷 复合材料 耐水性 防水剂 生态学 ...
In modern materials science, silane coupling agents, as a critical class of organic-inorganic hybrid materials, play a vital role in enhancing the performance of composite materials. their water resistance remains a significant challenge limiting their widespread application. This paper aims to explore the water resistance properties of silane coupling agents and the factors affecting them, providing theoretical and practical guidance for optimizing their use.
I. Basic Concept and Classification of Silane Coupling Agents Silane coupling agents are multifunctional compounds composed of siloxane bonds and carbon-hydrogen chains. Based on their chemical properties and application fields, they can be categorized into various types, such as amino silanes, mercapto silanes, and vinyl silanes. These agents are widely used in coatings, adhesives, sealants, and other fields.
II. Analysis of Water Resistance in Silane Coupling Agents Water resistance refers to the ability of silane coupling agents to maintain their original properties without hydrolysis, emulsification, or swelling under specific conditions. This characteristic is crucial for ensuring stability in complex environments. research on their water resistance, especially comparative analyses across different types, remains limited.
III. Factors Affecting Water Resistance
- Molecular Structure and Functional Groups: The molecular structure significantly influences water resistance. Silane coupling agents with more hydrophobic groups (e.g., benzene rings, alkyl chains) generally exhibit stronger water resistance. Additionally, functional groups affect performance; polar groups, for instance, tend to accelerate hydrolysis in aqueous environments.
- Temperature and pH: High temperatures increase the rate of hydrolysis, reducing water resistance. Similarly, acidic conditions may promote hydrolysis, while alkaline environments can stabilize certain formulations.
- Concentration and Dispersion Medium: Within optimal concentration ranges, water resistance improves with increasing concentration. excessive concentrations may reduce resistance due to enhanced intermolecular interactions. The dispersion medium (e.g., water vs. oil) also impacts water resistance.
IV. Practical Applications of Water Resistance Despite challenges, water resistance can be improved through optimized preparation processes, careful selection of silane types, and protective measures. Strategies such as introducing hydrophobic groups, controlling molecular weight distribution, and using high-molecular-weight polymers for surface modification effectively enhance water resistance.
V. Conclusions and Prospects Water resistance is a key consideration in the application of silane coupling agents. By analyzing factors like molecular structure, functional groups, temperature, pH, concentration, and dispersion medium, the mechanisms behind water resistance can be better understood. Future advancements in material technologies may lead to the development of silane coupling agents with superior water resistance, meeting increasingly stringent application demands.
