Nanocoating on alkali-resistant glass fibers by octadecyltrichlorosilane to improve the mechanical strength of fibers and fibers/epoxy composites

Abstract

Surface defects cause the measured tensile strength of alkali glass fibers to be significantly lower than their theoretical values. Coatings can be used to “heal” surface flaws and to modify surface properties. In the present work, the nanocoating on alkali-resistant glass (ARG) fiber rovings was carried out by self-assembled monolayers (SAMs) of octadecyltrichlorosilane (OTS). The ARG roving was dipped into OTS nanosol, which deposited the organic–inorganic SAMs of OTS on the ARG surface. The assessment of changes in the fiber surfaces was characterized by scanning electron microscopy (SEM) and fluorescence microscopy, while the chemical changes were characterized by X-ray photoelectron spectroscopy (XPS). Furthermore, the influence of nanocoating on the tensile properties of ARG and OTS-treated ARG with and without an epoxy matrix was also studied. The SEM analysis revealed the formation of nanoscale layers on the ARG surfaces and the XPS confirmed the deposition of organic–inorganic monolayers. The tensile strength of ARG rovings with and without the epoxy matrix was improved significantly. The OTS treatment almost created a superhydrophobic nanocoating on ARG, which was confirmed by the sessile drop water contact angle, and the water absorption by the ARG/epoxy composites reduced.

Organosilane-modified wood materials: A review of research and applications

“…The direct application of silane on wood also occurred, such as some studies using silane impregnation to reduce the hydrophilic properties of waterlogged wood (Broda et al 2019a). Kumar et al (2018) used a self-assembled monomolecular membrane based on octadecyl trichlorosilane to perform nanocoatings on the surface of alkaline resistant glass fibers. This system successfully formed superhydrophobic nanocoatings on the surface of alkali resistant glass while increasing its tensile strength.…”

Environmental Impact of Textile Reinforced Concrete Facades Compared to Conventional Solutions—LCA Case Study

“…In the Czech Republic, as well as globally, there is a growing demand for aesthetic elements made of pitch-faced concrete. Raw concrete is not only a material for further surface treatment but is increasing in popularity in its pure form, especially for use for facade elements [11,12]. The increasing use of concrete, however, has a significant impact on the environment [13].…”

Enhanced interfacial adhesion in glass fiber fabric/epoxy composites employing fiber surface treatment with aminosilane-functionalized graphene oxide

“…A common and effective strategy for improving the interfacial adhesion of GFRE is the surface treatment of glass fibers by various organics (e.g., silane coupling agents, sizing agents) and nanofillers (e.g., nanosilica, nanoclay, nanocarbon materials and nanofiber). [5][6][7][8][9] Benefiting from superior mechanical, thermal and electrical properties, graphene and graphene oxide (GO) have recently emerged as promising nanofillers in strengthening the fiber/matrix interface of GFRE. 10,11 In particular, GO sheets exhibit higher performance and lower production costs compared to carbon nanotubes.…”

“…A common and effective strategy for improving the interfacial adhesion of GFRE is the surface treatment of glass fibers by various organics (e.g., silane coupling agents, sizing agents) and nanofillers (e.g., nanosilica, nanoclay, nanocarbon materials and nanofiber). 5–9…”