化工进展
化工進展
화공진전
CHEMICAL INDUSTRY AND ENGINEERING PROGRESS
2013年
10期
2453-2458,2462
,共7页
竹笋壳%羧甲基纤维素%纤维素%取代度
竹筍殼%羧甲基纖維素%纖維素%取代度
죽순각%최갑기섬유소%섬유소%취대도
bamboo shoot shell%carboxymethyl cellulose%cellulose%degree of substitution
以废弃毛竹笋壳为原料，经过4次加碱法制备出了羧甲基纤维素，并通过FTIR、XRD、TGA、SEM手段对原料与产品进行了表征。实验结果表明，制备羧甲基纤维素的最佳工艺条件为精制竹笋壳5 g，氢氧化钠5 g，氯乙酸6 g，85%乙醇溶液为溶剂，第1次碱化温度和时间分别为30℃和90 min，加入氢氧化钠总质量的80%，后3次碱化是在醚化过程中平均加入剩余20%的碱，醚化最终温度为70℃，醚化总时间为3 h。在此工艺条件下，所得到的羧甲基纤维素的取代度为0.9341，黏度为35 mPa·s。
以廢棄毛竹筍殼為原料，經過4次加堿法製備齣瞭羧甲基纖維素，併通過FTIR、XRD、TGA、SEM手段對原料與產品進行瞭錶徵。實驗結果錶明，製備羧甲基纖維素的最佳工藝條件為精製竹筍殼5 g，氫氧化鈉5 g，氯乙痠6 g，85%乙醇溶液為溶劑，第1次堿化溫度和時間分彆為30℃和90 min，加入氫氧化鈉總質量的80%，後3次堿化是在醚化過程中平均加入剩餘20%的堿，醚化最終溫度為70℃，醚化總時間為3 h。在此工藝條件下，所得到的羧甲基纖維素的取代度為0.9341，黏度為35 mPa·s。
이폐기모죽순각위원료，경과4차가감법제비출료최갑기섬유소，병통과FTIR、XRD、TGA、SEM수단대원료여산품진행료표정。실험결과표명，제비최갑기섬유소적최가공예조건위정제죽순각5 g，경양화납5 g，록을산6 g，85%을순용액위용제，제1차감화온도화시간분별위30℃화90 min，가입경양화납총질량적80%，후3차감화시재미화과정중평균가입잉여20%적감，미화최종온도위70℃，미화총시간위3 h。재차공예조건하，소득도적최갑기섬유소적취대도위0.9341，점도위35 mPa·s。
In this study carboxymethyl cellulose was successfully synthesized from bamboo shoot shell wastes using four-times alkalization method. The raw material and products were characterized by FTIR,XRD,TGA and SEM. The results showed that the optimal preparation conditions were pretreated cellulose 5 g,sodium hydroxide 5 g,chloroacetic acid 6 g,85%ethanol as solvent,first basification temperature and time were 30 ℃ and 90 min with 80% of total sodium hydroxide,the remaining 20% was averagely divided into three parts to add during the etherification process,final etherification temperature and total etherification time were 70℃and three hours. Under the optimized reaction conditions,the substituting degree of carboxymethyl cellulose obtained reached 0.9341 and the viscosity was 35 mPa·s.
