Biocomposites Based on Thermoplastic Starch and Granite Sand Quarry Waste

• 作者: Cecilia I.Paulo Daniel A.Vega Edgardo F.Irassarc Horacio A.Petit Marcelo A.Villar María G.Passaretti Mario D.Ninago Olivia V.López
• 来源期刊: 可再生材料杂志(英文)
• 学科: 工学
• 关键词: Thermoplastic STARCH GRANITE SAND MELT processing final properties
• 年，卷（期）: 2019,（4）
• 页码范围: 393-402
• 页数: 10页
• 分类号: TG1

摘要

Granite stone is a by-product of the rock crushing manufacturing.An industrial waste in powder form that causes health problems and environmental pollution.Fine particles fraction can be used as a partial replacement of sand in concrete manufacture.In this work,an alternative exploitation of this waste fraction is proposed.Granite sand(GS)with particles mean size of ~1μm was employed as thermoplastic starch(TPS)filler at different concentrations.Biocomposites were obtained by melt-mixing and thermo-compression,achieving translucent and easy to handle films.A good GS dispersion within the matrix was evidenced by SEM.Mineral presence induced a shift of starch’s melting point to higher values and a better thermal resistance.TPS UV absorption capacity was increased ~90% by GS addition.An increment in TPS Young’s modulus and maximum tensile stress of 5 and 3 times,respectively was observed by adding 5%w/w GS.