Effect of water absorption on the mechanical properties of cotton fabric-reinforced geopolymer composites

Abstract

Cotton fabric (CF) reinforced geopolymer composites are fabricated with fibre loadings of 4.5, 6.2 and 8.3 wt%. Results show that flexural strength, flexural modulus, impact strength, hardness and fracture toughness are increased as the fibre content increased. The ultimate mechanical properties were achieved with a fibre content of 8.3 wt%. The effect of water absorption on mechanical and physical properties of CF reinforced geopolymer composites is also investigated. The magnitude of maximum water uptake and diffusion coefficient is increased with an increase in fibre content. Flexural strength, modulus, impact strength, hardness and fracture toughness values are decreased as a result of water absorption. Scanning electron microscopy (SEM) is used to characterise the microstructure and failure mechanisms of dry and wet cotton fibre reinforced geopolymer composites.

Influence of Moisture Absorption and their Effect on the Physho-Mechanical Properties of Coir-Luffa Fibre Reinforced Polymer Matrix Composites

“…It is observed that the deformation depth increases for water-immersed specimen compared to dry one, due to the hydrophilic nature of fibers and led to the deformation of a weak fiber-matrix interface. The results also agree well with the results of Al-Mosawi Ali [10] and by other researchers working with natural fiber based composites [11,12]. …”

Laundry Detergency of Solid Non-Particulate Soil Using Microemulsion-Based Formulation

“…The total surfactant concentration was varied by diluting the selected formulation. The total oil removal increased with increasing total surfactant concentration to reach a plateau at around a 0.35 wt total surfactant concentration with a maximum oil removal of 65 and 70 for the polyester and cotton fabrics, respectively, which are in good agreement with a previous study 23 .This is likely explained by the fact that the cotton fabric contains highly polar hydroxyl groups OH to hydrogen-bond with water molecules, causing a swelling of the fibers 29 . Consequently, it lowered the oil-cotton surface interaction, and increased the amount of surfactant adsorbed onto the cotton surface.…”

Advancement in Packaging Film Using Microcrystalline Cellulose and TiO<sub>2</sub>

“…Hence, as cellulose content increased, the trend increases. Composite films contain high amount of Cellulose show high water uptake [7]. Meanwhile, composite films containing 10%, 15% and 20% of cellulose content differ somewhat from each other.…”