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疏水改性黄原胶HMXG-C8水溶液黏度特征 被引量:11

Aqueous Solution Viscosity Properties of Hydrophobically Modified Xanthan Gum HMXG-C8
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摘要 用1-溴代辛烷使黄原胶XG侧链上的—COOM基团酯化,得到以100结构单元计取代度为11和21的水溶性疏水改性黄原胶HMXG-C8—11和-21。介绍了合成步骤,讨论了合成反应,考察了C8-11和C8—21的黏度特性。浓度〉0.75g/dL的c8—11水溶液.浓度〉0.60g/dL的C8—21水溶液,表观黏度(25℃,7.31/s)急剧增大,显示疏水缔合增黏效应,C8—21的增黏效应较强。0.20g/dLC8-11和C8.21水溶液的表观黏度,起初随外加NaC1浓度的增大而减小,NaCI浓度超过0.4g/dL后缓慢增大((28.11)或较快增大((28—21),出现盐增黏效应。温度从25℃上升到90℃时,0.20g/dL的XG、C8—11和C8—21水溶液表观黏度的降低幅度依次增大,在同-温度下的表观黏度值也依次增大。0,20g/dL的C8.21和C8-11水溶液,分别在外加SDBS浓度为〈0.01~0.08和0.01~0.15mmo1/L时出现表观黏度升高现象.反映疏水缔合聚合物与阴离子表面活性剂之间发生了相互作用。图6参8。 Through esterification of functionality -COOM on side chains of xanthan gum by 1-bromcoctane, water soluble hydrophobically modified xanthan gums of octyl substitution 11 and 21 per 100 structural units, HMXG-CS-11 and -21, are prepared. The procedure and reactions of synthesis are presented and discussed, the viscosity properties of their aqueous solution are investigated. The apparent viscosity (AV) at 25℃ and 7.3 1/s of aqueous solution increases dramatically at concentration of 128-11 〉0.75 g/dL and of 128-21 〉0.60 g/dL owing to viscosifying effect of hydrophobical association, which is more stronger for 128-21. With increasing NaCl concentration, the AV of 0.2 g/dL HM G-C8 aqueous solution decreases at first and increases slowly for 128-11 and more fast for 128-21 at NaCl concentration 〉0.4 g/dL owing to salt viscosifylng effect. At temperatures raising from 25℃ to 90℃, the AV depression of 0.20 g/dL HMXG-C8 aqueous solution changes in increasing order XG〈C8-11〈C8-21 meanwhile the AV values at every equal temparature changes in the same order. For 0.20 g/dL aqueous solution of C8-21 and 128-11, AV raise is observed at concentration of SDBS in range 〈0.01-0.08 and 0.01-0.15 mmol/L, showing interaction of hydrophobically associating polymer with anionic surfactant.
出处 《油田化学》 CAS CSCD 北大核心 2007年第2期154-157,162,共5页 Oilfield Chemistry
关键词 疏水改性黄原胶 辛烷基取代黄原胶 制备 水溶液 黏度性能 增黏效应 采油用聚合物 hydrophobically modified xanthan octyl substituted xanthan preparation aqueous solution viscosity properties viscosi fying effects polymers for oil recovery
作者简介 钱晓琳(1978-),女,南京工业大学高分子化工专业学士(1999)、材料学专业硕士(2002)、北京理工大学材料学专业博士研究生(2006-),现在中国石化勘探开发研究院钻采所工作。通讯地址:100083北京市学院路中石化勘探开发研究院钻采所,E-mail:xiaolin.qian@yahoo.com.cn。 吴文辉(1947-),男,教授。北京理工大学高分子专业学士(1970)。从事水溶性高分子和功能高分子材料的研究,本文通讯联系人。通讯地址:100081北京理工大学材料科学与工程学院,电话:010-68912659,E-mail:wuwh@bit.edu.cn。
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