Influence of Surface Treatment on the Interfacial and Mechanical Properties of Short S-Glass Fiber-Reinforced Dental Composites

Abstract

The influence of interfacial shear strength (IFSS) between processed short S-glass fibers (250 and 350 μm in length, 5 μm in diameter) and the dental resin (a mixture of urethane dimethacrylate and triethylene glycol dimethacrylate monomers) on the mechanical properties has been studied experimentally. The surface profile of short S-glass fibers was modified using a selective atomic level metal etching process and simple silanization process to enhance the interfacial properties. The S-glass fibers were etched in acid solutions to increase the surface roughness and selectively remove Al3+ and Mg2+ ions, which promoted the mechanical and chemical interfacial bonding reactions. The single glass fiber tensile and microdroplet pull-out tests were performed to investigate the effects of interfacial properties on the flexural strength of the resultant composites. The surface modified S-glass fibers showed an increase of 11–40% in IFSS compared to untreated glass fibers. Composites reinforced with 350 μm length glass fibers (AR-70), which were treated in piranha solution for 4 h, showed the highest improvement in overall mechanical properties, flexural strength (34.2%), modulus (9.7%), and breaking energy (51.9%), compared to the untreated fiber-reinforced composites. The modified Lewis–Nielsen equation was developed using the effective fiber length factor to accurately predict the modulus of the short fiber-reinforced composites and validated with experimental results.

Biomimetic Mineralized Hydroxyapatite Nanofiber-Incorporated Methacrylated Gelatin Hydrogel with Improved Mechanical and Osteoinductive Performances for Bone Regeneration

“… 26 Therefore, one-dimensional bioceramic fillers with high aspect ratios are considered more promising reinforcements in this context, owing to their better supporting effect with ability to bridge and form networks. 27 To date, many one-dimensional fillers, such as HA nanofibers (HANFs), 28 glass fibers and halloysite nanotubes, 29 , 30 have been used to strengthen materials and develop bone grafts and cements with a higher bone regenerative capacity. Among them, HANFs, a synthetic inorganic material with a chemical composition similar to that of biological bone tissue, can confer an enhanced biological activity and mechanical performance to GelMA.…”

Dimensional stability of short fibre reinforced flowable dental composites

“…Several studies 1,9,10,31,33,40,41 have analysed the effect of a small volume of short fibres on mechanical and physical properties along with particulate fillers or addition of fibres to commercial composites. The effectiveness of surface etching, random orientation www.nature.com/scientificreports/ and uniform distribution were also evaluated where the interfacial shear strength measured by microdroplet pull-out study was enhanced by 39.6% 34,42 . With the replacement of 5 wt% glass particles with glass fibres (50AR and 70AR), the flexure strength and flexure modulus increased 22.3% and 9.7% respectively, compared to the filler only group 9 .…”

A Review of Electromagnetic Shielding Fabric, Wave-Absorbing Fabric and Wave-Transparent Fabric

“…According to Equation ( 12), the dielectric constant and loss Angle tangent of materials are the key factors affecting EM waves transmission. The materials with low dielectric constant, low loss Angle tangent and porosity should be selected as the wave-transparent materials [94][95][96].…”