Of fine powders, hardmetals, hazard and health risk
- 作者：Volkmat Richter ; Annegret Potthof ; Wolfgang Pompe ; Michael Gelinsky ; Hrissanthi Ikonomidou ; Susanne Bastia ; Kirstin Schirmer ; Stefan Scholz ; Jurgen Hofinger
- 关键词：Biodegradable composites ; Natural fiber ; Kenaf ; PLA ; Strength ; Biodegradability
- 刊名：Metal Powder Report
- 出版年：2007
- 期刊代码：70_00260657
- 类别：ms
- 出版时间：December 2007
- 卷：62
- 期：11
- 页码：12-14
- 文件大小：252 K
摘要
This paper describes the cultivation of kenaf and application to biodegradable composite materials. The unidirectional biodegradable composite materials were made from kenaf fibers and an emulsion-type PLA resin. Thermal analysis of kenaf fibers revealed that tensile strength of kenaf fibers decreased when kept at 180 °C for 60 min. Therefore, biodegradable composites were fabricated at a molding temperature of 160 °C. The unidirectional fiber-reinforced composites showed tensile and flexural strengths of 223 MPa and 254 MPa, respectively. Moreover, tensile and flexural strength and elastic moduli of the kenaf fiber-reinforced composites increased linearly up to a fiber content of 50%. The biodegradability of kenaf/PLA composites was examined for four weeks using a garbage-processing machine. Experimental results showed that the weight of composites decreased 38%after four weeks of composting.