CN104645875A - Viscoelastic system constructed by functional Gemini surfactants and preparation method of viscoelastic system - Google Patents
Viscoelastic system constructed by functional Gemini surfactants and preparation method of viscoelastic system Download PDFInfo
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Abstract
The invention relates to a method for preparing a viscoelastic surfactant solution obtained by complexing a cationic surfactant and three anionic surfactants of different chain lengths. The anionic surfactants can be any one of sodium laurate (SL), sodium myristate (SM) and sodium palmitate (SP). The viscoelastic surfactant solution is prepared by compounding a Gemini surfactant with a hydroxyl as a main component and a small amount of anionic surfactants. The preparation of the surfactant solution comprises two main processes, namely compounding and testing the viscoelastic performance. Specifically, the Gemini cationic surfactant is prepared into a solution of a certain concentration and the solution is complexed with the anionic surfactants according to different ratios, so that the viscoelastic surfactant solution can be obtained.
Description
Technical field
The present invention relates to the viscoelastic surfactant solution of a kind of cationic surfactant and the composite acquisition of a kind of anion surfactant, in particular to a kind of viscoelastic solution and preparation method thereof of the Gemini surface active composition containing functionalization group, belong to surfactant scientific domain.
Background technology
Gemini surface active comprises two head bases, article two, hydrophobic chain and a coupling link, by changing its structural element, on head base, such as introduce the group of functionalization, form worm micella, common worm-like micelle systems has anion/cation surfactant system, surfactant/salt system etc.The most obvious feature of vermiculate glues is exactly mutually be wound around between long micella, makes system have viscoplasticity.
Vermiculate glues has important application in daily life and in producing, and as can be used as oil field fracturing fluid, towing drag reducer, the thickening of daily article for washing, the template etc. of synthesis new material, thus obtain people and pay attention to widely.It is higher that simple surfactant forms worm micella desired concn, and cost is comparatively large, generally adds salt or polymer obtains the good solution of viscoplasticity.But salt is more needed for salt adding, and separation after addition polymerization compound is more difficult.
Summary of the invention
In order to the concentration solving simple surfactant is higher, the problem that cost is larger, the invention provides a kind of preparation method of the viscoelastic surfactant solution obtained by anionic-cationic surfactant mixed system.With hydroxyl Gemini surface active for main component, after composite with a small amount of anion surfactant, namely obtain the surfactant viscoelastic solution can with gel character.
Technical scheme of the present invention is: one has viscoelastic surfactant solution, be obtain by the anion surfactant of a kind of hydroxyl Gemini cationic surfactant and different chain length is composite respectively, the structural formula of Gemini cationic surfactant is wherein as follows:
The synthetic route of this Gemini cationic surfactant is as follows:
The Gemini cationic surfactant of acquisition is made into certain density solution, then composite according to different proportion with anion surfactant, the surfactant viscoelastic solution with gel character can be obtained.
Gemini cationic surfactant is fixed as the concentration of 50mM, composite with 10:1 ~ 5:10 ratio respectively with sodium laurate, tetradecylic acid sodium and sodium palmitate, obtains the surfactant viscoelastic solution with gel character.
Gemini cationic surfactant and the composite viscoelastic solution temperature range restraint obtained of sodium laurate, tetradecylic acid sodium and sodium palmitate different proportion are at 10 ~ 50 DEG C.
Beneficial effect
By hydroxyl Gemini cationic surfactant solution and a small amount of sodium laurate, tetradecylic acid sodium and sodium palmitate composite after namely obtain there is good viscoelastic solution, obviously can reduce use cost, can be applicable to oil field fracturing fluid, towing drag reducer and daily cleaning agent prescription.
Accompanying drawing explanation
Fig. 1 is the dynamic shearing figure (Gemini cationic surfactant concentration is 50mmol/L) of surfactant viscoelastic solution.Sodium laurate/50mM 12 (OH) 2-3-12 (OH) 2 dynamic shearing spectrum .G'(filled symbols, elastic modelling quantity), G " (open symbols, viscous modulus) with angular frequency to change.
Fig. 2 is the steady state shearing figure (Gemini cationic surfactant concentration is 50mmol/L) of surfactant viscoelastic solution.The steady state shearing figure of system during sodium laurate/50mM 12 (OH) 2-3-12 (OH) 2 different beta.
Detailed description of the invention
Embodiment 1: the synthesis of alpha-brominated methyl myristate.By tetradecylic acid (150g, 0.6568mol) add in 500ml there-necked flask, melt at 65 DEG C, thionyl chloride (106.6g is slowly dripped under stirring, 0.821mol), drip and temperature is increased to 90 DEG C, add a little elemental iodine as initator, slow dropping through the dried bromine (131.2g, 0.821mol) of the concentrated sulfuric acid, stirring and refluxing 12 hours, cool the temperature to 65 DEG C, drip absolute methanol (52.6g, 1.64mol) under stirring, add rear backflow 2-4 hour.Wash with water 3-4 time after cooling, then wash organic layer to neutral with saturated sodium bisulfite solution 50ml, finally wash with water 3-4 time again.Organic layer adds anhydrous magnesium sulfate drying and spends the night.After filtration, crude product decompression distillation is obtained alpha-brominated methyl myristate.175～180℃。
The synthesis of embodiment 2:Gemini cationic surfactant.By 200mL absolute ethyl alcohol, Dodecyl Bromide (100g, 0.4mol), diethanol amine (170g, 1.62mol) mixes, at 60 DEG C of reaction 48h.After cooling, then add NaOH (20g, 0.5mol) continuation stirring 1h.After rotary evaporation removing ethanol, in residue, add 150mL distilled water, then add 100mL ether, system layering.Be separated by upper organic layer, lower floor continues to use extracted with diethyl ether twice.Extract is merged, with distillation washing 2 times.Diethyl ether solution anhydrous magnesium sulfate drying, after filtering, ether rotary evaporation is removed.Residue decompression distillation obtains N-dodecyl diethanol amine, is colourless viscous liquid (180 DEG C/5mmHg).
By N-dodecyl diethanol amine (20g, 0.073mol), 1,3-dibromopropane (6.6g, 0.033mol) and the mixing of 20mL absolute ethyl alcohol add in closed container, react and carry out 72h at 115 DEG C.Reactant cools, rotary evaporation removing ethanol.Residue ethanol and re-crystallizing in ethyl acetate 3 times, after vacuum drying, obtain 12 (OH)-3-12 (OH), be white flaky solid.
Embodiment 3: the preparation of viscoelastic surfactant solution.The each 5ml of Gemini cationic surfactant solution of preparation 50mmol/L, add appropriate sodium laurate, tetradecylic acid sodium and sodium palmitate solid wherein respectively, make the mol ratio of Gemini cationic surfactant and sodium laurate and tetradecylic acid sodium reach 1:0.1,1:0.2,1:0.3 and 1:0.4 respectively, the mol ratio of Gemini cationic surfactant and sodium palmitate reaches 1:0.1,1:0.2,1:0.3,1:0.4 and 1:0.5 respectively.Namely serial viscoelastic surfactant solution is obtained after dissolving.
Embodiment 4: the viscoelasticity measurement of cationic and anionic surfactant solution.Gained viscoelastic surfactant solution is left standstill 48h at 25 DEG C, and at 25 DEG C, carries out the test of rheological property.Before dynamic scan, first carry out stress scans to determine to test the linear Nian Dan district of sample, the test of sample is all carried out in linear Nian Dan district.Concrete data are shown in Fig. 1 and Fig. 2.Fig. 1 is the dynamic shearing figure of test sample, and can find out, in tested frequency range, sample elastic modulus is greater than viscous modulus all the time, and interpret sample has good elasticity.Fig. 2 is the steady state shearing figure of sample, and along with the increase of cationic surfactant mol ratio, the zero-shear viscosity of sample increases, and can reach 12Pas when the mol ratio of Gemini cationic surfactant and sodium laurate is 1:0.3.
Claims (5)
1. the viscoelastic surfactant solution by anionic-cationic surfactant mixed system, by the sodium soap of different chain length and cationic surfactant is composite respectively obtains, it is characterized in that, its cationic surfactant can be composite with any one in sodium laurate (SL), tetradecylic acid sodium (SM) or sodium palmitate (SP).Cationic surfactant and sodium laurate, tetradecylic acid sodium and sodium palmitate composite in varing proportions, sodium soap content is the highest, and the viscoelastic solution efficacy of formation is better, but after reaching certain content, and the viscoelastic solution of formation then can be muddy.
2. the preparation method of viscoelastic surfactant solution according to claim 1, it is characterized in that, Gemini cationic surfactant is fixed as the concentration of 50mM, composite with 10:1 ~ 5:10 ratio respectively with sodium laurate, tetradecylic acid sodium and sodium palmitate, obtains surfactant viscoelastic solution.
3. the preparation method of viscoelastic surfactant solution according to claim 1, is characterized in that, Gemini cationic surfactant and sodium laurate composite, when mol ratio is 1:0.3, the zero-shear viscosity of this system is maximum, and sodium laurate content is higher subsequently, and zero-shear viscosity reduces.
4. the preparation method of viscoelastic surfactant solution according to claim 1, is characterized in that, Gemini cationic surfactant and tetradecylic acid sodium and sodium palmitate composite respectively, tetradecylic acid sodium and sodium palmitate content higher, zero-shear viscosity is higher.
5. the preparation method of viscoelastic surfactant solution according to claim 1, it is characterized in that, the preparation of Gemini cationic surfactant and sodium laurate, tetradecylic acid sodium and sodium palmitate viscoelastic solution system and serviceability temperature range restraint are at 10 ~ 50 DEG C.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105367429A (en) * | 2015-10-10 | 2016-03-02 | 江南大学 | Ion liquid crystal constructed by a positive ion Gemini surface active agent containing multiple hydroxyl groups and preparation method |
| CN108097159A (en) * | 2017-12-17 | 2018-06-01 | 江南大学 | The viscoelastic system and preparation method that a kind of Gemini type cationic and anionic surfactant is constructed |
| CN113331218A (en) * | 2021-05-19 | 2021-09-03 | 安徽达尔美生物科技有限公司 | Household sterilizing disinfectant and preparation method thereof |
| CN114854390A (en) * | 2022-04-14 | 2022-08-05 | 西南石油大学 | Polyhydroxy super-large hydrophilic head-based viscoelastic surfactant and synthesis method thereof |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105367429A (en) * | 2015-10-10 | 2016-03-02 | 江南大学 | Ion liquid crystal constructed by a positive ion Gemini surface active agent containing multiple hydroxyl groups and preparation method |
| CN108097159A (en) * | 2017-12-17 | 2018-06-01 | 江南大学 | The viscoelastic system and preparation method that a kind of Gemini type cationic and anionic surfactant is constructed |
| CN113331218A (en) * | 2021-05-19 | 2021-09-03 | 安徽达尔美生物科技有限公司 | Household sterilizing disinfectant and preparation method thereof |
| CN114854390A (en) * | 2022-04-14 | 2022-08-05 | 西南石油大学 | Polyhydroxy super-large hydrophilic head-based viscoelastic surfactant and synthesis method thereof |
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Effective date of registration: 20210913 Address after: 710000 Jingqin Road, North District, Jinghe Industrial Park, Xi'an City, Shaanxi Province Patentee after: SHAANXI RIXIN PETROCHEMICAL Co.,Ltd. Address before: 313000 room 1020, science and Technology Pioneer Park, 666 Chaoyang Road, Nanxun Town, Nanxun District, Huzhou, Zhejiang. Patentee before: Huzhou You Yan Intellectual Property Service Co.,Ltd. |