Development of metal hydroxide nanoparticles from eggshell waste and seawater and their application as flame retardants for ethylene-vinyl acetate copolymer (EVA). 2019

Mohamed Amine Oualha, and Nabil Omri, and Rafeh Oualha, and Mohamed Anouar Nouioui, and Manef Abderrabba, and Noureddine Amdouni, and Fouad Laoutid
Université de Tunis El Manar, Faculté des Sciences de Tunis, UR/11/ES/19 "Physico-chimie des matériaux à l'état condensé", 1068 Tunis, (Tunisia). Electronic address: aoualha.dae.ctc@gmail.com.

Recently, calcium hydroxide and magnesium hydroxide nanoparticles have attracted a lot of research interest in different sectors: food, packaging, health, automotive construction and food application. In the present study, we report development of bio-material calcium hydroxide nanoparticles (Ceg-Ca(OH)2), obtained from chicken eggshell collected from the food industries as well as magnesium hydroxide nanoparticles obtained from seawater (Seaw-Mg(OH)2). The flame-retardant behavior of Ethylene-Vinyl Acetate copolymer (EVA) containing different blends of Ceg-Ca(OH)2 and Seaw-Mg(OH)2 nanoparticles has been evaluated using cone calorimeter. Our results showed the interest of combining both nanoparticles. In fact, the partial substitution of small Seaw-Mg(OH)2 content (10 wt%) by Ceg-Ca(OH)2 enables further reduction of pHRR from 251 to 206 kW/m2 without any reduction of the composite time to ignition (52 s). Furthermore, the partial substitution of 40 wt% Seaw-Mg(OH)2 nanoparticles by Ceg-Ca(OH)2 enables high flame retardant effect as well as the generation of cohesive residue.

UI MeSH Term Description Entries
D008276 Magnesium Hydroxide An inorganic compound that occurs in nature as the mineral brucite. It acts as an antacid with cathartic effects. Brucite,Magnesium Hydrate,Magnesium Hydroxide (Mg(OH)4),Hydrate, Magnesium,Hydroxide, Magnesium
D008422 Materials Testing The testing of materials and devices, especially those used for PROSTHESES AND IMPLANTS; SUTURES; TISSUE ADHESIVES; etc., for hardness, strength, durability, safety, efficacy, and biocompatibility. Biocompatibility Testing,Biocompatible Materials Testing,Hemocompatibility Testing,Testing, Biocompatible Materials,Testing, Hemocompatible Materials,Hemocompatibility Testings,Hemocompatible Materials Testing,Materials Testing, Biocompatible,Materials Testing, Hemocompatible,Testing, Biocompatibility,Testing, Hemocompatibility,Testing, Materials,Testings, Biocompatibility
D011145 Polyvinyls POLYMERS derived from the monomer VINYL COMPOUNDS. Polyvinyl
D002126 Calcium Hydroxide A white powder prepared from lime that has many medical and industrial uses. It is in many dental formulations, especially for root canal filling. Hydroxide, Calcium
D004528 Egg Shell A hard or leathery calciferous exterior covering of an egg. Eggshell,Egg Shells,Eggshells,Shell, Egg,Shells, Egg
D005411 Flame Retardants Materials applied to fabrics, bedding, furniture, plastics, etc. to retard their burning; many may leach out and cause allergies or other harm. Fire Retardant,Fire Retardants,Fireproofing Agent,Fireproofing Agents,Flame Retardant,Agent, Fireproofing,Agents, Fireproofing,Retardant, Fire,Retardant, Flame,Retardants, Fire,Retardants, Flame
D000818 Animals Unicellular or multicellular, heterotrophic organisms, that have sensation and the power of voluntary movement. Under the older five kingdom paradigm, Animalia was one of the kingdoms. Under the modern three domain model, Animalia represents one of the many groups in the domain EUKARYOTA. Animal,Metazoa,Animalia
D012623 Seawater The salinated water of OCEANS AND SEAS that provides habitat for marine organisms. Sea Water,Sea Waters,Seawaters,Water, Sea,Waters, Sea
D013696 Temperature The property of objects that determines the direction of heat flow when they are placed in direct thermal contact. The temperature is the energy of microscopic motions (vibrational and translational) of the particles of atoms. Temperatures
D014866 Waste Products Debris resulting from a process that is of no further use to the system producing it. The concept includes materials discharged from or stored in a system in inert form as a by-product of vital activities. (From Webster's New Collegiate Dictionary, 1981) Product, Waste,Products, Waste,Waste Product

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