Liquefaction of Bagasse and Preparation of Rigid Polyurethane Foam from Liquefaction Products
Bagasse was liquefied in the mixture of polyethylene glycol 400 (PEG 400) and glycerin as the liquefying reagent in the presence of sulfuric acid as catalyst at 150 °C under atmospheric pressure for 2 h. The liquefaction products, having the hydroxyl number of 300∼450 mg KOH/g and viscosity of 1867–6986 mPa s at 25 °C, can be used as the polyol component to replace a part of traditional polyether polyol in the preparation of polyurethane foam. Rigid polyurethane foams were made from liquefied bagasse and diisocyanates catalyzed by dibutyltin dilaurate and triethylenediamine. The foams containing bio-polyol presented higher compressive strength and higher density than normal polyurethane foams did. The flame resistance of the polyurethane foam was improved by increasing the liquefied bagasse and flame retardant. The addition of liquefied bagasse into the foaming mixture resulted in enhanced degradation temperature of the polyurethane foam. Scanning electron microscopy (SEM) images suggested that the polyurethane foam containing liquefied bagasse had smooth surface and homogeneous foam structure.
Keywords: BAGASSE; BIO-POLYOL; LIQUEFACTION; POLYURETHANE FOAM
Document Type: Research Article
Publication date: 01 December 2009
- The goal of the creation of a biobased economy is challenging to agriculture, forestry, academia, government and industry. The extractable resources of the Earth are finite, regardless of the quibble over when they will be depleted. The economic, political and social demands for biobased chemicals, materials and energy are expected to radically transform the materials industries, particularly the plastics industry as well as the biofuel industry. These changes will be based on the principles of sustainability, eco-efficiency, industrial ecology, and green chemistry and engineering. In keeping with the growth of knowledge in this field, there is a strong need for a forum to share original research related to biobased materials and bioenergy. The Journal of Biobased Materials and Bioenergy (JBMB) has been created as an international peer-reviewed periodical to fulfill the need for communication in these research areas. This journal will encompass related research activities in all fields of science, engineering and the life sciences.
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