Silane coupling agent 3‐aminopropyltriethoxysilane modified silica/epoxidized solution‐polymerized styrene butadiene rubber nanocomposites

The use of industrial waste red mud in polymer composites promotes environmental sustainability by mitigating the environmental impacts associated with landfill disposal. Previous research by the authors on red mud sisal fiber composites resulted in increased strength; it is expected that the strength can be increased further through fiber treatment. As a result, the current study sought to examine the effects of chemical‐treated sisal fiber reinforcement on the mechanical properties of red mud composites. Alkaline treatment and silane treatment were both used as chemical treatment methods. Red mud was added in three different weight percentages, and composites were built using the compression molding method and tested for hardness, tensile strength, flexural strength, and impact strength. The findings indicate that the strength of the composite increases with the incorporation of treated fibers, silane‐treated 30% red mud composites showed a maximum hardness of around 92 shore D. The tensile strength of the composites containing 20% red mud and treated with silane was the highest, reaching ca. 63 MPa. This significant increase in strength was attributed to the formation of strong interfacial bonding between the red mud, fiber, and matrix. Furthermore, the silane‐treated 20 wt% red mud composites have the highest flexural strength (ca. 244 MPa) and impact strength (ca. 26 J/m). However, increasing the red mud content above 20 wt% resulted in decreased tensile, flexural, and impact strength due to poor bond development, and red mud agglomeration. The findings of this study are beneficial for the design and development of composites based on red mud, as well as for promoting sustainable waste management practices.Highlights Red mud composites achieve superior mechanical strength. Chemical treatment enhances sisal fiber reinforcement. Sustainable waste management promoted through composite utilization. Strong interfacial bonding improves composite performance.

Section: Introductionmentioning

confidence: 99%

Chemical‐treated sisal fiber reinforcement in red mud composites: Advancing mechanical strength and environmental sustainability

J.,

Sankaran,

Veerasimman

et al. 2023

Effect of 1‐ethylpyridinium bromide on enhancing the dispersion of silica and interfacial strength in rubber‐silica composite

Sun,

Liu,

Fan

et al. 2024

Improving the interfacial interaction between silica and rubber is always a key issue to be solved for silica‐filled rubbers. In this paper, composites are prepared by an in‐situ modification method using 1‐ethylpyridinium bromide ([EPy]Br) as the raw material, and the effect of its dosage on the interfacial interactions and macroscopic properties of silica‐filled natural rubber (NR) composites is investigated. The effect of [EPy]Br on silica dispersion and interfacial interaction between silica and NR is verified through rheological tests and calculations of glass layers. Compared with the original samples, composite performance is optimized when the usage amount is at 1phr which increases tensile strength by 5 MPa, enhances abrasion resistance by 24%, and shortens optimum curing time in half. This study is expected to provide a new strategy for improving the processability of silica‐containing composites while reducing energy consumption.Highlights [EPy]Br enhances the interaction between rubber and filler while modifying the surface of silica. Increasing the dosage of [EPy]Br leads to a reduction in the Payne effect. The addition of [EPy]Br enhances the dispersion of silica in natural rubber. [EPy]Br significantly reduces the duration of the induction period for vulcanization. The dosage of [EPy]Br allows for controlling the mechanical properties of NR/SiO2.

Effect of silane coupling agent grafted glycidyl methacrylate on hollow microsphere/natural rubber composites

Zhao,

Duan,

Peng

et al. 2024

To improve the interfacial bonding between hollow microspheres (RiM01) and natural rubber (NR), the silane coupling agents γ‐aminopropyltriethoxysilane (KH550) and γ‐methacryloyloxypropyltrimethoxysilane (KH570) are used in this study as intermediate reaction platforms for the modification of (RiM01) with glycidyl methacrylate (GMA), respectively. In the process, GMA reacts with KH550 and KH570 through epoxy group ring‐opening and free radical polymerization, respectively. Different NR/RiM01@GMA composites are prepared by a mechanical blending method. The results show that the addition of GMA improves the interfacial bonding between RiM01 and NR, and enhances the vulcanization rate and cross‐linking degree of the rubber composites. When KH550 is used as the reaction platform, the tensile strength of the rubber composites increases by 24% compared to composites with unmodified RiM01, while when KH570 is used, the tensile strength increases by 18%. Additionally, the tear strength and abrasion resistance of the rubber composites increase by 13% and 15%, respectively, when KH570 is used as the reaction platform. At the same time, the filler‐matrix interaction is strongest when KH570 is used as the reaction platform, and the rubber composites exhibit the lowest rolling resistance and the best resistance to heat and oxygen aging.Highlight Modification of hollow microspheres by grafting GMA with KH550 and KH570, respectively. Improvement of rubber composite properties after modification GMA improves the interfacial bonding between hollow microspheres and rubber.