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The National Agricultural Library is one of four national libraries of the United States, with locations in Beltsville, Maryland and Washington, D.C. It houses one of the world's largest and most accessible agricultural information collections and serves as the nexus for a national network of state land-grant and U.S. Department of Agriculture field libraries. In fiscal year 2011 (Oct 2010 through Sept 2011) NAL delivered more than 100 million direct customer service transactions.

Journal Article

Journal article

comparative study of the mechanical properties of hemp fiber with virgin and recycled high density polyethylene matrix  [2013]

Lu, Na; Oza, Shubhashini;

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Hemp reinforced composites were prepared using both recycled high density polyethylene (rHDPE) and virgin high density polyethylene (vHDPE). The effects of fiber loading and the different type of matrix on the composites’ mechanical and thermo-mechanical properties were studied. Prior to composite fabrication, hemp fibers were treated with 5wt% NaOH. The change in surface morphology and chemical composition of hemp fibers after treatment was analyzed by scanning electron microscope and Fourier transform infrared spectroscopy. Findings indicate that a 5wt% NaOH treatment effectively improved the fiber–matrix interface resulting in improved mechanical properties. With respect to both, mechanical and thermo-mechanical properties, hemp fiber composites with rHDPE matrix performed better than composites with vHDPE matrix. The optimized fiber loading of hemp–rHDPE was 40% volume fraction while achieving the highest tensile strength of 60.2MPa and flexural strength of 44.6MPa. The hemp–rHDPE composites with 30% of fiber loading demonstrated the best impact strength of 51.1KJ/m².

Publicación

Composites

ISSN : 1359-8368