Waterborne Polyurethane/Nano‐SiO2 Hybrid Organic–Inorganic Sizing Agents for Enhanced Mechanical Properties of Carbon Fibers/Epoxy Composites
Source abstract
Abstract
The bond strength between carbon fiber (CF) and sizing agent and the surface roughness of CF play a vital role in improving the interfacial properties of composite materials. In order to solve this problem, a new multiscale enhancement strategy is developed. Through the hydrolysis reaction of anhydrous silica sol in self‐emulsifying highly hydrophilic waterborne polyurethane (WPU) emulsion, the generated crosslinked network of SiOSi bonds generates hydrogen bond interaction between CF surface and WPU, which enhances the bonding strength of sizing agent to CF. At the same time, the nano‐SiO2 generated by hydrolysis further improves the interfacial stress transfer of the composites through the interlocking mechanism. The surface roughness, O/C ratio, and compatibility with the resin matrix of the CF after sizing are significantly improved, and the interlaminar shear strength and flexural strength of the corresponding composites are increased by 53.06 and 50.89%, respectively. In addition, the sizing agent prepared by this method overcomes the shortcomings of poor storage stability of traditional inorganic nanomaterial‐modified sizing agent. In short, this work provides assistance for the development and application of high‐performance sizing agents.
Source: crossref · Quality: baseline
Research context
OpenAlex topics: Fiber-reinforced polymer composites · Tribology and Wear Analysis · Silicone and Siloxane Chemistry
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
Institute of Petrochemical Technology and Institute of Postgraduate Jilin Institute of Chemical Technology Jilin 132022 P. R. China
Jilin Guoxing Carbon Fiber Co., Ltd. 45 Chengde Street Jilin P. R. China
Funding
Natural Science Foundation of Jilin Province · Natural Science Research Project of Guizhou Province
References (40)
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