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National Chung Hsing University Institutional Repository - NCHUIR > 農業暨自然資源學院 > 生物產業機電工程學系 > 依資料類型分類 > 期刊論文 >  Effects of operating conditions on the cellular structure and the thermal properties of extruded foams made from corn

Please use this identifier to cite or link to this item: http://nchuir.lib.nchu.edu.tw/handle/309270000/131359

標題: Effects of operating conditions on the cellular structure and the thermal properties of extruded foams made from corn
作者: Lui, W.B.;Peng, J.C.
彭錦樵
關鍵字: operating conditions;cellular structure;thermal properties;degradable;extruded foam;starch
日期: 2003
Issue Date: 2012-12-07 16:23:11 (UTC+8)
關連: Journal of Cellular Plastics, Volume 39, Issue 6, Page(s) 439-450.
摘要: The characteristics of a corn extrudate generally appear similar to commercial plastic foam cushioning materials. If extruded foams from whole yellow dent corn are used for loose fill cushioning material, low cost will be realized. In addition, this extruded foam is biodegradable and might even be recoverable as animal feed or as an ethanol feedstock. It could also be spread on farm fields as a soil amendment. Extrusion technology has been applied in cornstarch processing for many years. Different categories of extruders have been developed to give various advantages and disadvantages as used for production. The low-moisture (low-cost) extruder cooker is a good choice for producing low cost expanded corn for packaging use. The objective of this study is to focus on the feed compositions and screw configurations affecting the cellular structure and the specific heat of extruded foams and to evaluate corn/PVA extrudates as packaging material. Experimental results indicated that: 1. The size of air cells became smaller and more uniform, and the air cell wall became thinner with the increase in screw pitch and screw speed. Moreover, using the food grade corn grits also made the size of cells smaller and more uniform. 2. Treatments 5 and 22 had the highest specific heats. For all treatments, the specific heat increased linearly as the temperature increased. 3. The extrudates from Treatments 5 and 22 have potential applications as thermal insulation applications for their high specific heat values.
Relation: Journal of Cellular Plastics
Appears in Collections:[依資料類型分類] 期刊論文
[依教師分類] 彭錦樵

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