十二叔胺改性瓜尔胶交联过程的流变性质
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摘要
为提高瓜尔胶交联凝胶的强度和流变性能,用十二叔胺和环氧氯丙烷对羟丙基瓜尔胶进行疏水改性,制得羟丙基瓜尔胶衍生物(DA-HPG)。用有机锆交联剂与改性前后的瓜尔胶交联,研究了基液质量分数、p H值、温度、剪切速率对交联过程的影响。结果表明,在实验范围内,剪切交联过程的稳态黏度随基液质量分数增大、温度升高、pH值增大、剪切速率减小而增大;0.3%DA-HPG适宜的交联条件为基液pH=10.8数11.0、温度30℃、0.2%交联剂加量。流变动力学模型可较好地描述交联过程。对改性前后的0.3%的瓜尔胶溶液及交联凝胶进行流变学测试,改性后体系的黏弹性、黏温性均有大幅提升,分子分解温度提高,结构更加稳定。图11表5参19
In order to improve the strength and rheological properties of crosslinked guar gum gels,a hydrophobic modified guar gum was developed and synthesized. Hydroxypropyl guar gum was hydrophobically modified with dodecyl dimethyl tertiary amine and epichlorohydrin to obtain hydroxypropyl guar derivative(DA-HPG). After crosslinking with organic zirconium crosslinker,the influences of concentration of solution,pH value,shear rate and temperature on the cross-linking process were investigated. The results showed that in the experimental range,the steady-state viscosity of the shear-crosslinking process increased with increasing concentration,pH value and temperature and decreasing shear rate. The preferred crosslinking condition for 0.3% DA-HPG was obtained as follows:p H 10.8数 11.0,30℃,0.2% crosslinker. The crosslinking rheokinetics equation could well fit the cross-linking process. In addition,the rheological properties of 0.3% guar gum solution and crosslinked gel before and after modification were compared. The viscoelasticity and viscosity-temperature relationship were greatly improved,the molecular decomposition temperature increased and the structure was more stable after modification.
In order to improve the strength and rheological properties of crosslinked guar gum gels,a hydrophobic modified guar gum was developed and synthesized. Hydroxypropyl guar gum was hydrophobically modified with dodecyl dimethyl tertiary amine and epichlorohydrin to obtain hydroxypropyl guar derivative(DA-HPG). After crosslinking with organic zirconium crosslinker,the influences of concentration of solution,pH value,shear rate and temperature on the cross-linking process were investigated. The results showed that in the experimental range,the steady-state viscosity of the shear-crosslinking process increased with increasing concentration,pH value and temperature and decreasing shear rate. The preferred crosslinking condition for 0.3% DA-HPG was obtained as follows:p H 10.8数 11.0,30℃,0.2% crosslinker. The crosslinking rheokinetics equation could well fit the cross-linking process. In addition,the rheological properties of 0.3% guar gum solution and crosslinked gel before and after modification were compared. The viscoelasticity and viscosity-temperature relationship were greatly improved,the molecular decomposition temperature increased and the structure was more stable after modification.
引文
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[2]POINOT T,GOVIN A,GROSSEAU P.Influence of hydroxypropylguars on rheological behavior of cement-based mortars[J].Cem Concr Res,2014,58(58):161-168.
[3]PULIGUNDLA P,CHO Y H,LEE Y T.Physicochemical and sensory properties of reduced-fat mayonnaise formulations prepared with rice starch and starch-gum mixtures[J].Emirates J Food Agric,2015,27(6):463-468.
[4]HIREMATH J N,VISHALAKSHI B.Evaluation of a pH-responsive guar gum-based hydrogel as adsorbent for cationic dyes:kinetic and modelling study[J].Polym Bull,2015,72(12):1-19.
[5]BAHAMDAN A,DALY W H.Hydrophobic guar gum derivatives prepared by controlled grafting processes[J].Polym Adv Technol,2007,18(8):652-659.
[6]高虹,张雪婷,房殿军,等.吉林油田可重复利用压裂液体系研究[J].油气田环境保护,2017,27(1):32-34.
[7]XIE Wei,SONG Zhanqian,LIU Zhenhua,et al.Surface modification of PCC with guar gum using organic titanium ionic crosslinking agent and its application as papermaking filler[J].Carbohydr Polym,2016,150(5):114-120.
[8]吴丽蓉,罗兆,王群立,等.瓜胶压裂液用杀菌剂评价指标有效性的影响因素[J].钻井液与完井液,2017,34(5):91-95.
[9]SHARMA B R,KUMAR V,SONI P L.Carbamoylethylation of guar gum[J].Carbohydr Polym,2004,58(4):449-453.
[10]张华丽,周继东,杲春,等.胍胶压裂液伤害性研究[J].科学技术与工程,2013,13(23):6866-6871.
[11]施晓旦,李丽,王养臣.阴离子瓜尔胶的制备方法:CN101323647-A[P].2008-12-17.
[12]FUJISAKA Y,TAJIMA N,SATOU T,et al.Treatment of muddy water from aggregate plant:JP 9267002-A[P].1997-10-14.
[13]周兴华.新型牙膏黏合剂--非离子改性瓜尔胶:CN1401726A[P].2003-03-12.
[14]赵修太,仇东旭,宋丽,等.疏水缔合改性羟丙基瓜尔胶的合成工艺[J].精细石油化工,2011,28(1):41-45.
[15]宫瑞英,吴文辉,史学峰.疏水改性羟丙基胍胶的制备及性能[J].高分子材料科学与工程,2009,25(6):132-134.
[16]CHEN Jie,FANG Bo,YU Licheng,et al.Interfacial rheological property and rheokinetics of a novel photoreversible micellar system[J].J Dispersion Sci Technol,2016,37(2):183-189.
[17]严芳芳,方波,卢拥军,等.有机锆交联羟丙基瓜胶流变动力学[J].高校化学工程学报,2015,29(4):802-808.
[18]RISICA D,BARBETTA A,VISCHETTI L,et al.Rheological properties of guar and its methyl,hydroxypropyl and hydroxypropyl-methyl derivatives in semidilute and concentrated aqueous solutions[J].Polymer,2010,51(9):1972-1982.
[19]朱仪玫.改性纤维素溶液流变性及交联凝胶过程流变动力学研究[D].上海:华东理工大学,2016:20-21.