羟丙基香豆胶的合成及结构表征  被引量:2

Preparation and Characterization of Hydroxypropyl Fenugreek Gum

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作  者:刘瑛[1] 牛春梅[2] 王著[3] 吴文辉[3] 史学峰[3] 

机构地区:[1]商丘师范学院化学系,河南商丘476000 [2]河北科技大学材料科学与工程学院,石家庄050018 [3]北京理工大学材料科学与工程学院,北京100081

出  处:《河南大学学报(自然科学版)》2007年第4期361-364,402,共5页Journal of Henan University:Natural Science

基  金:河南省自然科学基金项目(0511020300)

摘  要:以天然香豆胶为原料,环氧丙烷(EP)为非离子醚化剂,NaOH为催化剂,异丙醇为分散剂制备了非离子型羟丙基香豆胶(HPFG).用MORGAN串联法测定HPFG的取代度(DS),研究了EP用量、NaOH用量、反应温度和反应时间对HPFG表观黏度和DS的影响.结果表明:当反应温度50℃,反应时间3 h,m(香豆胶)∶m(EP)∶m(异丙醇)∶m(NaOH)=1∶0.5∶1.7∶0.04时,制得的产品能满足油田工业评价指标要求,即表观黏度()η=560~1 000 mPa.s(w(HPFG)=1%)、DS=0.16~0.20,并用13C NMR进行表征.A series of hydroxypropyl fenugreek gum (HPFG) were prepared with natural fenugreek gum as matrix, epoxy propane (EP) as nonionic etherifying agent, NaOH as catalyst and isopropyl alcohol as dispersant under alkaline conditions. Degree of substitution (DS) of HPFG was determined using MORGAN method. The effects of EP content, catalyst NaOH content, reaction temperature and time on apparent viscosity and DS were investigated. The results showed that the product could meet the evaluating indicator requirement of oil industry application, that is, apparent viscosity(η)=560-1 000 mPa. s (w(FG)=1%,170 s^-1), DS=0.16-0.20 as reaction temperature 50 ℃, reaction time3 h and m(fenugreek gum) : m(isopropyl alcohol) : m(EP) :m(NaOH)=1 : 0.5 : 1.7 : 0.04. The product was characterized by 13^C NMR.

关 键 词:羟丙基香豆胶 香豆胶 半乳甘露聚糖 

分 类 号:O631.6[理学—高分子化学]

 

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