农机化研究
農機化研究
농궤화연구
JOURNAL OF AGRICULTURAL MECHANIZATION RESEARCH
2013年
7期
188-190,197
,共4页
朱恩龙%杨昭%朱宗升
硃恩龍%楊昭%硃宗升
주은룡%양소%주종승
青豆种子%玻璃化%转变温度%外推法
青豆種子%玻璃化%轉變溫度%外推法
청두충자%파리화%전변온도%외추법
green soybean%glass%transition temperature%trend extrapolation
种子在干燥过程会发生玻璃化转变的现象。为了确定含水率和升温速率对青豆种子玻璃化转变温度Tg的影响规律,采用差式扫描量热法( DSC)测试了在含水率11%~27%( d.b.)、升温速率1~5℃/min 的青豆种子玻璃化转变温度,并通过外推法确定了数学模型。结果表明:含水率和升温速率对Tg的影响效果明显, Tg值随含水率的增加而降低,随升温速率的增加而增加。测试结果为利用玻璃化转变理论确定青豆种子的最优干燥工艺提供了关键参数。
種子在榦燥過程會髮生玻璃化轉變的現象。為瞭確定含水率和升溫速率對青豆種子玻璃化轉變溫度Tg的影響規律,採用差式掃描量熱法( DSC)測試瞭在含水率11%~27%( d.b.)、升溫速率1~5℃/min 的青豆種子玻璃化轉變溫度,併通過外推法確定瞭數學模型。結果錶明:含水率和升溫速率對Tg的影響效果明顯, Tg值隨含水率的增加而降低,隨升溫速率的增加而增加。測試結果為利用玻璃化轉變理論確定青豆種子的最優榦燥工藝提供瞭關鍵參數。
충자재간조과정회발생파리화전변적현상。위료학정함수솔화승온속솔대청두충자파리화전변온도Tg적영향규률,채용차식소묘량열법( DSC)측시료재함수솔11%~27%( d.b.)、승온속솔1~5℃/min 적청두충자파리화전변온도,병통과외추법학정료수학모형。결과표명:함수솔화승온속솔대Tg적영향효과명현, Tg치수함수솔적증가이강저,수승온속솔적증가이증가。측시결과위이용파리화전변이론학정청두충자적최우간조공예제공료관건삼수。
Glass transition phenomenon could be occurred in the seeds drying process .In order to indentify the influence of the moisture content and heating rate on green soybean seeds glass transition temperature , the glass transition tempera-ture was test with differential scanning calorimetry at moisture content in a range of 11%to 27%( d.b) and heating rate from 1 to 5 ℃/min.By using trend extrapolation , glass transition temperature model was gotten .Results indicated that glass transition temperature was decreased with moisture content increased and increased with heating rated increased . The test results provide key parameters for green soybean seeds on optimal drying technology with glass transition theory .