Papers by Keyword: Human Hair

Abstract: Rapid urbanization, economic expansion and population growth have led to a significant increase in global solid waste production, which threatens ecosystems, depletes natural resources, and negatively affects human health. Textile waste has reached 150 million tons per year and constitutes a significant portion of this growing waste stream. At this point, interest in the use of recycled materials as an alternative raw material has increased, and composite materials have emerged as a promising area for the evaluation of textile waste, offering sustainable solutions for resource recovery and waste management. In this study, hybrid composites are developed by introducing various fibrous waste groups (denim and human hair) and bio-resin (acrylated epoxidized soybean oil, AESO) to E-glass reinforced epoxy composites, and the effects of waste type and bio-resin addition on the flexural strengths of the structures are examined using a full factorial experimental design. In this regard, three different sandwich structures are designed, with the outer layers made of E-glass woven fabric and the middle layers made of either E-glass fabric for control samples or different waste groups, and the productions are carried out using the vacuum infusion method. Pure epoxy or an epoxy system with 30% AESO additive is used as matrix material. Statistical results indicate that reinforcement type has a huge effect on the flexural properties individually and in binary interactions of of other factors. The performance results show that the flexural strength is improved with addition of waste regardless of their type and the best flexural properties are seen in samples with denim waste reinforcement containing cotton fiber, while the addition of AESO appears to have a negative effect. The composite structures developed within this study have the potential to replace particle boards, thus contributing to solid waste management and producing innovative solutions to resource scarcity.

Abstract: This study examines the utilization of human hair as a reinforcing material in epoxy-based composites. By conducting a series of experiments, the research investigates how various proportions of hair impact the properties of these composites. The results indicate that increasing the amount of hair significantly improves the strength of the materials. This research not only contributes to material engineering by repurposing a waste product but also holds potential for applications in industries such as automotive and aerospace where strong and lightweight materials are crucial.

Abstract: Fibre reinforced composites are used in automotive, defence and structural applications because of their economic and ecological advantage but they have limitation of lower mechanical strength. To balance this limitation of mechanical properties, hybrid composites are being manufactured. In this paper jute and human hair was selected for preparation of jute / human hair reinforced polyester hybrid composite. Human hair was selected because it is non-biodegradable and has high tensile strength. A single human hair can bear 1.5 Newton load. Recently various researcher started work towards development of bio-composites. It has been found that a mechanical property increases after adding hair in hybrid composites. Mechanical properties such as tensile strength, young modulus, and flexural strength were also compared with the already published jute composite results. To understand the fracture behaviour of composite morphology of the fractured surface was done by scanning electron microscope (SEM). The composite application is in environmental conditions addition and thus it is subjected to moisture presence, therefore study of water absorption behaviour of fabricated composite was also studied.

Abstract: A body armor is vital for users in combat filed. Normally, the body armor have two components: soft and hard ones. This paper proposes feasibility assessment technique to evaluate contemporary materials: Kevlar, natural spider silk, and human hair, for making soft component of the body armor. There are four criteria: technical, economic, legal, and operational feasibilities to generate the feasibility assessment matrix. The optimal material in question is human hair which has highest rank at 82%.

Abstract: Color protective effects of honeysuckle extract, benzophenone-3, and non-ionic silicon emulsion to hair fibers were compared by measuring color change of hair exposed to UV irradiation. Dyed color fades faster than natural pigment of hair after sunlight irradiation. Experiment results indicate that honeysuckle extract prevented color fading of dyed red hair in 49.52% and virgin black hair in 19.35% due to its strong antioxidant ability, while color protection effect of benzophenone-3 is not obvious. Non-ionic silicone emulsion provided the best maintenance of hair color of 81.46% in dyed red hair and 41.94% in virgin black hair. However, the synergy of honeysuckle extract with non-ionic silicone emulsion for hair color protecting was not encouraged.

Abstract: Protection effects of milk thistle extract, benzophenone-3, and non-ionic silicon to hair fibers were compared by measuring protein degradation, tryptophan degradation, lipid peroxidation, tensile characteristics and color change of hair exposed to irradiation. Experiment results indicate that milk thistle extract is more marked in protection of protein, lipid, breaking work in hair due to its strong antioxidant ability, while benzophenone-3 is the most effective in tryptophan protection. Color protection was significantly observed in silicone and milk thistle extract treated samples. However, the synergy of milk extract with non-ionic silicone emulsion and benzophenone-3 with non-ionic silicone for protecting hair was not encouraged.

Abstract: In order to investigate the persistence and stability of the human hair setting effect, different setting temperature, setting time, dry and damp conditions were designed to carry out damp-heat setting on real hair samples. Crimp recovery was used to evaluate elastic recovery of crimp hair. The tensile properties of human hair before and after setting were also tested. Results showed that crimp hair setted in the damp state presented a better elasticity than that in the dry state. With the increase of setting time, crimp elasticity increased. In the damp state, setting temperature of 114°C and setting time of 40 minutes were the best condition for the setting of crimp hair.

Abstract: A new method for the determination of traces of mercury in environmental and biological samples is described. The present methodology combines determined using a hydride generation-atomic absorption spectrometry (HG-AAS) with pre-concentration/separation of the analyte on dithizone-anchored organobentonite (D-O-bentonite). Optimal experimental conditions for the adsorption of the Hg, including pH, contact time, eluent concentration and volume and co-existing ions have been studied. The result showed that the mercury could be adsorbed on the D-O-bentonite. The adsorbed quantitively was affected by the pH value of medium and contact time. In the medium of pH 5.0, the adsorption time was 15 min, and capacity of adsorption was 23.2 mg·g^-1. The mercury adsorbed on the sorbent could be completely eluated by using 3 mol·L^-1 HCl. The adsorption agent has been applied to the pre-concentration/separation of mercury in surface water and human hair samples with satisfied results.