过程工程学报
過程工程學報
과정공정학보
The Chinese Journal of Process Engineering
2010年
1期
173-178
,共6页
机械活化%羧甲基淀粉%合成%表征
機械活化%羧甲基澱粉%閤成%錶徵
궤계활화%최갑기정분%합성%표정
mechanical activation%carboxymethyl starch%synthesis%characterization
以机械活化60min的木薯淀粉为原料,采用乙醇溶剂法合成了高取代度的木薯羧甲基淀粉.通过正交实验优化羧甲基淀粉的合成工艺条件,探讨了反应时间、反应温度、催化剂用量、醚化剂用量、乙醇浓度及淀粉乳浓度等因素对羧甲基淀粉取代度的影响.结果表明,其合成的最优工艺条件为:反应温度50℃,乙醇浓度90%,反应时间120min,ClCH_2COOH与淀粉摩尔比0.80,淀粉乳浓度35%(w),NaOH与淀粉摩尔比0.80.在此条件下合成的羧甲基淀粉的取代度为1.24.并对产物的结构进行了表征.
以機械活化60min的木藷澱粉為原料,採用乙醇溶劑法閤成瞭高取代度的木藷羧甲基澱粉.通過正交實驗優化羧甲基澱粉的閤成工藝條件,探討瞭反應時間、反應溫度、催化劑用量、醚化劑用量、乙醇濃度及澱粉乳濃度等因素對羧甲基澱粉取代度的影響.結果錶明,其閤成的最優工藝條件為:反應溫度50℃,乙醇濃度90%,反應時間120min,ClCH_2COOH與澱粉摩爾比0.80,澱粉乳濃度35%(w),NaOH與澱粉摩爾比0.80.在此條件下閤成的羧甲基澱粉的取代度為1.24.併對產物的結構進行瞭錶徵.
이궤계활화60min적목서정분위원료,채용을순용제법합성료고취대도적목서최갑기정분.통과정교실험우화최갑기정분적합성공예조건,탐토료반응시간、반응온도、최화제용량、미화제용량、을순농도급정분유농도등인소대최갑기정분취대도적영향.결과표명,기합성적최우공예조건위:반응온도50℃,을순농도90%,반응시간120min,ClCH_2COOH여정분마이비0.80,정분유농도35%(w),NaOH여정분마이비0.80.재차조건하합성적최갑기정분적취대도위1.24.병대산물적결구진행료표정.
Carboxymethyl starch (CMS) with high degree of substitution (D_S) was synthesized by ethanol method, using cassava starch activated for 60 min as material. The process conditions were optimized by orthogonal experiments, the effects of reaction time, reaction temperature, catalyst amount, etherifying agent amount, concentration of ethanol and concentration of starch on D_S of CMS were investigated. The results indicated that the optimized conditions for synthesis of high D_S cassava CMS were temperature 50℃, concentration of ethanol 90%, reaction time 120 min, molar ratio of ClCH_2COOH to starch 0.80, concentration of starch 35%(w) and molar ratio of NaOH to starch 0.80. The value of D_S was 1.24 under the synthetic conditions. Furthermore the product was further characterized.
