Preparation and characterization of ramie-glass fiber reinforced polymer matrix hybrid composites

Abstract

The use of ramie fibers as reinforcement in hybrid composites is justified considering their satisfactory mechanical properties if compared with other natural fibers. This study aims to verify changes in chemical composition and thermal stability of the ramie fibers after washing with distilled water. One additional goal is to study glass fiber and washed ramie fiber composites focusing on the effect of varying both the fiber length (25, 35, 45 and 55 mm) and the fiber composition. The overall fiber loading was maintained constant (21 vol.%). Based on the results obtained, the washed ramie fiber may be considered as an alternative for the production of these composites. The higher flexural strength presented being observed for 45 mm fiber length composite, although this difference is not significant for lower glass fiber volume fractions: (0:100) and (25:75). Also, by increasing the relative volume fraction of glass fiber until an upper limit of 75%, higher flexural and impact properties were obtained.

Influence of Stacking Sequence on the Mechanical and Dynamic Mechanical Properties of Cotton/Glass Fiber Reinforced Polyester Composites

“…The peak at 2896 cm -1 is characteristic of the stretching vibration of C-H present in cellulose and hemicellulose 9 , and the band at 1622 cm -1 may be related to the presence of water in the fibers 10 . The absence of a peak at 1730 cm -1 , characteristic of the carboxyl group of hemicellulose 11 , corroborates the TGA results, i.e. the low content of hemicellulose in cotton.…”

“…The second weight loss process associated with the maximum decomposition rate at 348 °C is related to the degradation of the cellulose in the fiber. An extra weight loss process is sometimes observed in some natural fibers in the 220-310 °C range related to the presence of hemicellulose, but this was not identified in the DTG of the cotton probably due to the low amount of hemicellulose present in this fiber [9][10][11] . According to Satyanarayana et al 9 , the composition of cotton is ~90% cellulose, ~6% hemicellulose, and 4% extractives, lignin and waxes.…”

“…Intense peak vibrations observed at 1032 cm -1 are related to the (CO) and (OH) stretching vibrations of the polysaccharide in cellulose. The peak at 894 cm -1 indicates the presence of β-glycosidic linkages between monosaccharides 11,13 . Figure 3 shows an increase in impact strength with the glass fiber content due to the improved resistance brought by these fibers in the composites .…”

Effect of layering sequence and chemical treatment on the mechanical properties of woven kenaf–aramid hybrid laminated composites

“…Siddika et al [31] reported the effect of chemical treatment of fibre on jute-coir fibre reinforced hybrid polypropylene composites by 5 % NaOH treatment shows an improving trend of mechanical properties. Similar effect was observed in glass/jute reinforced polyester [32] and in ramie-glass fibre reinforced polymer matrix hybrid [33].…”

Study of stinging nettle (urtica dioica l.) Fibers reinforced green composite materials : a review

“…Glass fiber that is difficult to be decomposed triggers serious health and environment problems. They cannot be recycled easily by heat because they melt in very high temperature and still produce residues that may spoil the environment and are relatively abrasive in nature, as what are mentioned in the result of some studies [1][2][3][4][5]. The main focus of this study is to find out the potency of natural fiber of stinging nettle as the replacement of glass fibers as reinforced composite fibers.…”