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頁籤選單縮合
題 名 | 原料配方對擠壓緩衝產品物性之影響=Effects of Feed Compositions on Physical Properties of Loose-Fill Extrudates |
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作 者 | 莊世昌; 彭錦樵; 宋國祥; 戴思雯; | 書刊名 | 農林學報 |
卷 期 | 49:2 2000.06[民89.06] |
頁 次 | 頁17-38 |
分類號 | 434.251 |
關鍵詞 | 擠壓緩衝產品; 尿素; 氫氧化鈣; Loose-fill extrudates; Urea; Calcium hydroxide; |
語 文 | 中文(Chinese) |
中文摘要 | 本實驗是利用單軸擠壓機,以有用玉米粉為主原料,添加不同比例之聚乙烯醇 (PVA)、氫氧化鈣和尿素,使用三變數五層級的反應曲面法之中心組合旋轉設計,分別探討 加工參數(PVA、氫氧化鈣與尿素的添加比例)對擠壓緩衝產品物性(膨發直徑、徑向膨發 率、縱向膨發、假密度)之影響。 實驗結果顯示: 產品之膨發直徑密PVA添加比例增加而降低。當氫氧化鈣添加比例增加時,膨發直徑則 呈現先升後降之趨勢。尿素則對產品膨發直徑沒有顯著的影響。徑向膨發率隨PVA添加而下 ?;但隨氫氧化鈣添加比例之增加而呈現先上升後下?之勢。若尿素和氫氧化鈣交互影響時, 氫氧化鈣添加比例低於4%時,徑向膨發率隨尿素之添加呈微幅下降的趨勢;若氫氧化鈣添 加比例超過4%時,尿素之添加會造成徑向膨發率之上升。縱向膨發隨PVA及氫氧化鈣添加 比例增加而升高,但隨連素添加入例增加而會先上升後下降。假密度隨氫氧化鈣之添加而降 低。而PVA及尿素添加比例對產品假密度無顯著影響。 |
英文摘要 | The corn grit was used as the raw material in a single-screw extruder to study the effects of feed compositions on physical properties of losse-fill extrudates. The response surface methodology with three variables and five levels was used as the experimental design. The process variables were the ratios of polyvinyl alcohol(PVA), Calcium hydroxide (Ca(OH)2), and urea. The extrudate's physical properties such as expansion diameter, radial expansion ratio, longitudinal expansion, and bulk density were investigated. Experimental results indicated that: The extrudate's expansion diameter decreased with increasing PVA ratio. The expansion diameter increased with increasing Ca(OH)2 ratio, then decreased gradually. There were no significant differences between urea and expansion diameter. Increasing the PVA ratio decreased the extrudte's radial expansion ratio. The radial expansion ratio also increased with increasing Ca(OH)2 ratio, then decreased gradually. As the radial expansion ratio was interacted by urea and Ca(OH)2, it slightly decreased with increasing urea ratio when the Ca(OH)2 ratio was lower then 4%, and it increased with increasing urea ratio when the Ca(OH)2 ratios. The longitudinal expansion increased with increasing urea ratio, then decreased gradually. The extrudate's bulk density decreased with increasing Ca(OH)2 ratio. PVA and urea ratios had no significant effects on bulk density. |
本系統中英文摘要資訊取自各篇刊載內容。