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1、214s0SVo l. 21, N o . 42005M7POLYM ER M AT ERIALS SCIENCE AND ENGINEERING Jul. 20058Jnull哈丽丹买买提1, 努尔买买提2, 吾满江艾力2( 1.vZ!830008; 2.S,Z!830000)K1: 以废弃的棉短绒及尿素为原料,二甲苯为溶剂合成了纤维素氨基甲酸酯。考察了各种影响因素,得到优化条件为: 废弃的棉短绒经脱脂漂白后在质量分数为20%的氢氧化钠溶液中预处理6 h8 h,尿素与精制的棉短绒质量比为( 34)1,反应温度为 137 ,反应时间为 4 h。元素分析测得产品氮的质量分数约为9%。1oM:8J
2、;Ums|: T Q 352. 71DSM: AcI|: 1000-7555( 2005) 04-0102-0388K*a88,3aAT3a8,CS2Q8,a8b,CS2v,b 1 ,8J(eCC)9T8388K.BW,1C20W80M 2 ,-n 3j7 ,7S=7nZbl=J&8UQ,8JbQ8,CS2,h,Q%8,V%i,32v,?a388 8b1Ls1. 11(.l) ;_)aQo)aaUa=J&a=JJk4:(sBb1. 21.2. 1棉短绒的脱酯及水解:.l,!,Vr,6. 54%_)A,=150Hq/2 h,!,sYQo)(co1% )(1. 5% )#,!,B/,HClAP 9
3、 ,iY=Af*9( 10b1.2. 2精制棉短绒的活化处理:|20%_)AB1,10lHVr,!,_)A,a8b1.2. 3纤维素氨基甲酸酯的合成:|a8s250 mLgQ,FU,U,FB4(=J&) ,/6bV,4Bm,d6mH,Vy,i6Q( 137)bQ4 h,l=J&Q!,Vr,0%8b1. 2.4产物的FT-IR 及元素分析测试:|nulll: 2004-08-16;: 2005-05-06:SES/o7?pv( 2004BA901A22)Te:Wc4( 1966- ) ,o(:B) ,V,=.E-mail: Halidan 2000 yahoo. com . cnKBr,;NFT
4、 -IR;mbFT-IRmM1,m1732 cm - 1CBi( LIU Ren-qing) .8$(T he Bas icof Cellulose Chemistry ) .:S( Beijing:Science Pr ess ) , 1985: 86j92. 10( LUO Su-ju an) .8Y( T he GuangxiCh emical Fiber Letter s) , 1998, 2: 26j28.SYNTHESISOFCELLULOSECARBAMATEHalidan M amat1, Nur mmamat2, Wumanjiang Aili2( 1. Institute
5、of Chemistry and Chemical Industry, Xinjiang University, Urumqi 830008, China;2. TheXinjiang Institute of Physical & Chemical Technology, Urumqi 830016, China)ABSTRACT: Cellulo se car bamate w as synthesized in x ylene as so lvent w ith abandoned co tton vel-vet cellulose and urea as raw m aterials.
6、 All factors affecting the N content in the products w ereinv estig ated. T he optimum techno logical conditions w ere determ ined that the pr etreatment of mi-cro cry stalline cellulose takes place in 20% N aOH solutio n for 6 hj8 h and the reaction is carriedout at 137for 4 h w ith the m ass ratio o f ur ea to m icrocrystalline cellulo se = ( 3j4)1. Ele-mentary analy sis indicates that the content o f nitrog en in the products is about 9% .Keywords: cellulose car bamate; cotton velvet; urea104s0S2005M
