CN109403038A - A kind of cationic polymer surface grafting vinylon fibre and preparation method thereof - Google Patents
A kind of cationic polymer surface grafting vinylon fibre and preparation method thereof Download PDFInfo
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- CN109403038A CN109403038A CN201710709492.5A CN201710709492A CN109403038A CN 109403038 A CN109403038 A CN 109403038A CN 201710709492 A CN201710709492 A CN 201710709492A CN 109403038 A CN109403038 A CN 109403038A
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Abstract
The invention discloses a kind of cationic polymer surface grafting vinylon fibres, the preparation method comprises the following steps: taking Epicholorohydrin-dimethylamine Cationic Polymer, are configured to 1% aqueous solution, adjust pH value to 12；Vinylon fibre is added, is warming up to 70 DEG C, 40~80 minute hour of insulation reaction takes out, sufficiently rinsed with water, dries to get cationic polymer surface grafting vinylon fibre.The present invention is grafted base fibrous material surface by cationic polymer, by the chemical modification of fiber surface, substantially improves the wettability and dispersion performance of fiber.Modified vinylon fiber of the invention, it is when being scattered in fracturing fluid system, it can be achieved that evenly dispersed, guar gum-fibre space network structure is formed, the solid-carrying performance of fiber fracturing liquid system is substantially increased, helps to improve the flow conductivity of pressure break supporting crack；Fiber-proppant forms firm sand arch in fracturing fracture simultaneously, can effectively inhibit the reflux of proppant, be obviously improved fracturing transformation effect.
Description
Technical field
The present invention relates to a kind of cationic polymer surface grafting vinylon fibres and preparation method thereof, belong to oil-gas field development
Pressing crack construction Material Field.
Background technique
Hydraulic fracturing technology is the main yield-increasing technology measure of low-permeability oil deposit, and solid-carrying performance is to influence fracturing technology to implement
One of an important factor for.In hydraulic fracturing work progress, support sedimentation or load fluid of the haydite in fracturing fluid system in pressure break
Haydite sand fallout when migrating in crack is inevitable, this often reduces the flow conductivity of supporting crack, thus to reservoir
Fracturing transformation effect produces bigger effect.For high flow-guiding channel fracturing technology, the pressure break after fiber is added is taken
Sand liquid, in system fiber dispersion can and solid-carrying performance be to influence the most key factor of the process implementing, be to determine pressure break
Core whether the high flow-guiding channel formation in crack.After adding fiber in the fracturing fluid system of the fracturing technology, when fiber is uniform
When being dispersed in fracturing fluid system, fiber and guar gum etc., which exist, stablizes intermolecular combination, forms guar gum-network of fibers system,
The viscosity and solid-carrying performance for increasing fracturing fluid, can be effectively reduced the sinking speed of haydite, to effectively improve supporting crack
Flow conductivity and fracturing transformation effect.
It, usually can be close in fracturing fluid recovery (backflow) process and subsequent oil well normal productive process after well fracturing construction
The proppant that proppant backflow (spitting sand) phenomenon occurs in well area or even some wells flow back out reach proppant total amount 20% with
On.Proppant backflow will lead to long support seam, slit width and flow conductivity decline, influence fracturing transformation effect.The support to flow back out
If agent is returned drain or produces liquid band to ground, the equipment such as oil nozzle, valve may be corroded；If reflux proppant is deposited in nearly well
Cylinder then may cause sand and bury preforation tunnel even nearly pit shaft.These all seriously affect oil gas well yield after pressure, and it is unnecessary to increase
Flow chart and expense.Fiber fracturing technology is stablized proppant by forming spacial framework between fiber and proppant
In home position, and fluid can pass freely through.After fracturing fluid starts the row of returning, since fluid scouring acts on, promote to form a system
Stable arch sand arch structure is arranged, is conducive to control proppant and returns and spit, while discharge speed can be improved, shorten the row's of returning time,
Improve final fracturing fluid recovery (backflow) efficiency and fracturing transformation effect.
Currently, hydraulic fracturing in the prior art be easy to appear in fracturing fluid system with fibrous material agglomerating, fibring, at
The dispersities such as beam, it tends to be difficult to which evenly dispersed, solid-carrying performance is also to be improved, it is difficult to meet Low permeable oil and gas reservoirs pressure break and take
The demand of sand, it is necessary to which processing is modified with fibrous material surface to pressure break.
Summary of the invention
For the above-mentioned prior art, the present invention provides a kind of cationic polymer surface grafting vinylon fibres, and its system
Preparation Method, and preparing the solid-carrying performance of fracturing fluid, raising fracturing fluid system, inhibiting the application in proppant backflow.This hair
It is bright that base fibrous material surface is grafted by cationic polymer, it has obtained that dispersion performance can be significantly improved and has taken grittiness
The modified vinylon fiber of energy.
The present invention is achieved by the following technical solutions:
A kind of preparation method of cationic polymer surface grafting vinylon fibre: take epichlorohydrin-dimethylamine cationic
Polymer adds water to be configured to the cationic polymer aqueous solution that mass concentration is 0.8%~1.2%, and sodium hydroxide solution is added
PH value is adjusted to 12 ± 0.5；Vinylon fibre is added, is warming up to 70 DEG C ± 3 DEG C, stirring makes its infiltration, and 40~80 points of insulation reaction
Clock (seals, to prevent water point evaporation) when reaction, takes out, is sufficiently rinsed with water to remove the cationic polymerization remained on fiber
Object is dried to get cationic polymer surface grafting vinylon fibre；The use of the cationic polymer aqueous solution and vinylon fibre
Measure ratio are as follows: 2~5 grams of vinylon fibres are added in every rising Yang ionomer aqueous solution.
The Epicholorohydrin-dimethylamine Cationic Polymer is made from the following raw materials in parts by weight: 40~60 parts
Dimethylamine agueous solution, 2~7 parts of crosslinking agents, 30~50 parts of epoxychloropropane, 2~5 parts of sodium hydrate aqueous solutions；It is by following
What method was prepared: the dimethylamine agueous solution that mass fraction is 30%~35% being mixed with crosslinking agent, is placed in ice-water bath (0
~10 DEG C) in, it stirs evenly, epoxychloropropane (dripping off within about 3 hours) is slowly added dropwise；After being added dropwise, it is warming up to 80 DEG C ± 3
DEG C, isothermal reaction 1.5~2.5 hours；The sodium hydrate aqueous solution that mass fraction is 17%~23% is added, 0.5 after addition
Occur within~1.0 hours climbing axis phenomenon, a small amount of water is added and inhibits until no longer climbing axis phenomenon；Hydrochloric acid is added and terminates reaction, and
With salt acid for adjusting pH to faintly acid (pH value 5~6), proper amount of methanol is then added, precipitates and filters, by filtered product 50
Vacuum drying is at DEG C to get Epicholorohydrin-dimethylamine Cationic Polymer.
The crosslinking agent is selected from ethylenediamine, hexamethylene diamine, diethylenetriamine, triethylene tetramine.
The cationic polymer surface grafting vinylon fibre being prepared using the above method, can be used for preparing pressure break
Liquid can effectively increase the viscosity of fracturing fluid system, effectively improve the solid-carrying performance of fracturing fluid system, and support can be effectively suppressed
The reflux of agent.
Method of the invention is grafted base fibrous material surface by cationic polymer, passes through fiber surface
Chemical modification, substantially improve the wettability and dispersion performance of fiber.Modified vinylon fiber of the invention, is scattered in pressure break
It is when in liquid system, it can be achieved that evenly dispersed, guar gum-fibre space network structure is formed, fiber fracturing liquid system is substantially increased
Solid-carrying performance, help to improve the flow conductivity of pressure break supporting crack；Fiber-proppant is formed surely in fracturing fracture simultaneously
Solid sand arch, can effectively inhibit the reflux of proppant, be obviously improved fracturing transformation effect.
Specific embodiment
Below with reference to embodiment, the present invention is further illustrated.
Instrument involved in following embodiments, reagent, material etc. are unless otherwise noted existing in the prior art
Conventional instrument, reagent, material etc., can be obtained by regular commercial sources.Experimental method involved in following embodiments, inspection
Survey method etc. is unless otherwise noted existing routine experiment method in the prior art, detection method etc..
Embodiment 1 prepares cationic polymer surface grafting vinylon fibre
Steps are as follows:
(1) Epicholorohydrin-dimethylamine Cationic Polymer is prepared
Firstly, by 50 parts of (parts by weight, similarly hereinafter) dimethylamine agueous solutions (mass fraction 33%) and 3 parts of crosslinking agent divinyls three
Amine mixes in 250ml four-hole boiling flask, stirs evenly in ice-water bath (0~10 DEG C)；40 parts of epoxychloropropane are placed in drop again
(when dropwise addition temperature remain at 10 DEG C hereinafter, time for adding be about 3.0 hour) in liquid funnel, is slowly added dropwise in flask；
After epoxychloropropane is added dropwise, gradient increased temperature is to 80 DEG C, isothermal reaction 2.0 hours；Then 3 parts of sodium hydrate aqueous solutions are added
(mass fraction 20%) climbs the appearance of axis phenomenon 0.5~1.0 hour after adding sodium hydroxide aqueous solution, and a small amount of water is added and carries out
Inhibit, until no longer climbing axis phenomenon；It is eventually adding hydrochloric acid and terminates reaction, and be adjusted to faintly acid (pH value 6) with hydrochloric acid, then
Proper amount of methanol is added, precipitates and filters, filtered product is dried in vacuo at 50 DEG C to get epichlorohydrin-dimethylamine
Cationic polymer.
(2) cationic polymer aqueous solution is prepared
Epicholorohydrin-dimethylamine Cationic Polymer is taken, the cationic polymer that configuration quality concentration is 1% is water-soluble
The pH value of cationic polymer aqueous solution is adjusted to 12 with sodium hydrate aqueous solution under the measurement of acidometer by liquid.
(3) cationic polymer graft modification vinylon fibre
According to the ratio that 2.5 grams of vinylon fibres are added in every rising Yang ionomer aqueous solution, vinylon fibre is put into sun
In ionomer aqueous solution, 70 DEG C are warming up to, wetting is impregnated on one side, stirs on one side, while paying attention to sealing, prevent the steaming of moisture
Hair, sustained response 1.0 hours；The vinylon fibre being modified is taken out, is sufficiently rinsed with water, removal remains in the modification on fiber
Liquid puts baking oven drying into later to get Epicholorohydrin-dimethylamine Cationic Polymer surface grafting vinylon fibre.
Embodiment 2
The guar gum aqueous solution that mass fraction is 0.5% is prepared, 100.0g several pieces are taken, it is fine to be separately added into different amounts of polyvinyl
Dimension or modified vinylon fiber (preparation of embodiment 1), after mixing evenly, add 0.05g organic borate cross-linker, are warming up to after crosslinking
90 DEG C, 12.0 hours are kept the temperature, different gel samples are obtained；The viscosity of each gel sample at 90 DEG C is measured with III brookfield viscosity of DV-, is surveyed
Test result is as shown in table 1.Seen from table 1, modified vinylon fiber of the invention can dramatically increase when being applied to fracturing fluid system
The viscosity of fracturing fluid system, hence it is evident that be better than vinylon fibre.
Gel rubber system viscosity (the shear rate: 7.34s of 1 90 DEG C of table, different fiber dosages-1)
Note: vinylon fibre average length 6mm；15 μm of vinylon fibre average diameter；Vinylon fibre density 1.28g/ml；It is modified
Vinylon fibre average length 6mm；15 μm of modified vinylon fiber average diameter；Modified vinylon fiber density 1.28g/ml.
Embodiment 3
Prepare mass fraction be 0.5% guar gum aqueous solution, take 100.0g several pieces, be added different amounts of vinylon fibre or
Modified vinylon fiber (preparation of embodiment 1) is added 50.0g ceramsite sand (partial size: 0.425mm~0.85mm) after mixing evenly, then
It stirs evenly, adds 0.05g organic borate cross-linker, be warming up to 90 DEG C, obtain different pressure break load fluid samples.Haydite is measured in difference
Sinking speed in pressure break load fluid sample, test result are as shown in table 2.As can be seen from Table 2, modified vinylon fiber of the invention,
The sinking speed that can obviously reduce ceramsite sand improves its solid-carrying performance, hence it is evident that is better than vinylon fibre.
Haydite sinking speed in load fluid under 2 90 DEG C of table, different fiber dosages
Embodiment 4 prepares cationic polymer surface grafting vinylon fibre
Steps are as follows:
(1) Epicholorohydrin-dimethylamine Cationic Polymer is prepared
Firstly, by 40 parts of dimethylamine agueous solutions (mass fraction 33%) and 2 parts of crosslinking agent hexamethylene diamines in 250ml four-hole boiling flask
Middle mixing stirs evenly in ice-water bath (0~10 DEG C)；50 parts of epoxychloropropane are placed in dropping funel again, are slowly added dropwise
In flask (temperature remains at 10 DEG C hereinafter, time for adding is about 3.0 hours when dropwise addition)；Epoxychloropropane is added dropwise
Afterwards, gradient increased temperature is to 80 DEG C, isothermal reaction 1.5 hours；Then 2 parts of sodium hydrate aqueous solutions (mass fraction 20%) are added,
0.5~1.0 hour after adding sodium hydroxide aqueous solution, the appearance of axis phenomenon is climbed, a small amount of water is added and is inhibited, until no longer occurring
Climb axis phenomenon；It is eventually adding hydrochloric acid and terminates reaction, and be adjusted to faintly acid (pH value 6) with hydrochloric acid, proper amount of methanol is then added, precipitate
And filter, filtered product is dried in vacuo at 50 DEG C to get Epicholorohydrin-dimethylamine Cationic Polymer.
(2) cationic polymer aqueous solution is prepared
Epicholorohydrin-dimethylamine Cationic Polymer is taken, the cationic polymer that configuration quality concentration is 0.8% is water-soluble
The pH value of cationic polymer aqueous solution is adjusted to 12 with sodium hydrate aqueous solution under the measurement of acidometer by liquid.
(3) cationic polymer graft modification vinylon fibre
According in every rising Yang ionomer aqueous solution be added 2 grams of vinylon fibres ratio, by vinylon fibre be put into sun from
In sub- aqueous solutions of polymers, 70 DEG C are warming up to, wetting is impregnated on one side, stirs on one side, while paying attention to sealing, prevent the steaming of moisture
Hair, sustained response 40 minutes；The vinylon fibre being modified is taken out, is sufficiently rinsed with water, removal remains in the modification on fiber
Liquid puts baking oven drying into later to get Epicholorohydrin-dimethylamine Cationic Polymer surface grafting vinylon fibre.
Embodiment 5 prepares cationic polymer surface grafting vinylon fibre
Steps are as follows:
(1) Epicholorohydrin-dimethylamine Cationic Polymer is prepared
Firstly, by 50 parts of dimethylamine agueous solutions (mass fraction 35%) and 7 parts of crosslinking agent ethylenediamines in 250ml four-hole boiling flask
Middle mixing stirs evenly in ice-water bath (0~10 DEG C)；30 parts of epoxychloropropane are placed in dropping funel again, are slowly added dropwise
In flask (temperature remains at 10 DEG C hereinafter, time for adding is about 3.0 hours when dropwise addition)；Epoxychloropropane is added dropwise
Afterwards, gradient increased temperature is to 80 DEG C, isothermal reaction 2.5 hours；Then 4 parts of sodium hydrate aqueous solutions (mass fraction 20%) are added,
0.5~1.0 hour after adding sodium hydroxide aqueous solution, the appearance of axis phenomenon is climbed, a small amount of water is added and is inhibited, until no longer occurring
Climb axis phenomenon；It is eventually adding hydrochloric acid and terminates reaction, and be adjusted to faintly acid (pH value 5) with hydrochloric acid, proper amount of methanol is then added, precipitate
And filter, filtered product is dried in vacuo at 50 DEG C to get Epicholorohydrin-dimethylamine Cationic Polymer.
(2) cationic polymer aqueous solution is prepared
Epicholorohydrin-dimethylamine Cationic Polymer is taken, the cationic polymer that configuration quality concentration is 1.2% is water-soluble
The pH value of cationic polymer aqueous solution is adjusted to 12 with sodium hydrate aqueous solution under the measurement of acidometer by liquid.
(3) cationic polymer graft modification vinylon fibre
According in every rising Yang ionomer aqueous solution be added 5 grams of vinylon fibres ratio, by vinylon fibre be put into sun from
In sub- aqueous solutions of polymers, 70 DEG C are warming up to, wetting is impregnated on one side, stirs on one side, while paying attention to sealing, prevent the steaming of moisture
Hair, sustained response 80 minutes；The vinylon fibre being modified is taken out, is sufficiently rinsed with water, removal remains in the modification on fiber
Liquid puts baking oven drying into later to get Epicholorohydrin-dimethylamine Cationic Polymer surface grafting vinylon fibre.
Embodiment 6 prepares cationic polymer surface grafting vinylon fibre
Steps are as follows:
(1) Epicholorohydrin-dimethylamine Cationic Polymer is prepared
Firstly, by 50 parts of dimethylamine agueous solutions (mass fraction 30%) and 5 parts of crosslinking agent triethylene tetramines in tetra- mouthfuls of 250ml
It mixes in flask, is stirred evenly in ice-water bath (0~10 DEG C)；40 parts of epoxychloropropane are placed in dropping funel again, slowly
(temperature remains at 10 DEG C hereinafter, time for adding is about 3.0 hours when dropwise addition) is added dropwise in flask；Epoxychloropropane is added dropwise
After, gradient increased temperature is to 80 DEG C, isothermal reaction 2.0 hours；Then 5 parts of sodium hydrate aqueous solution (mass fractions are added
20%), 0.5~1.0 hour after adding sodium hydroxide aqueous solution, the appearance of axis phenomenon is climbed, a small amount of water is added and is inhibited, until
No longer climb axis phenomenon；It is eventually adding hydrochloric acid and terminates reaction, and be adjusted to faintly acid (pH value 6) with hydrochloric acid, be then added appropriate
Methanol is precipitated and is filtered, and filtered product is dried in vacuo at 50 DEG C and is gathered to get epichlorohydrin-dimethylamine cation
Close object.
(2) cationic polymer aqueous solution is prepared
Epicholorohydrin-dimethylamine Cationic Polymer is taken, the cationic polymer that configuration quality concentration is 1% is water-soluble
The pH value of cationic polymer aqueous solution is adjusted to 12 with sodium hydrate aqueous solution under the measurement of acidometer by liquid.
(3) cationic polymer graft modification vinylon fibre
According in every rising Yang ionomer aqueous solution be added 3 grams of vinylon fibres ratio, by vinylon fibre be put into sun from
In sub- aqueous solutions of polymers, 70 DEG C are warming up to, wetting is impregnated on one side, stirs on one side, while paying attention to sealing, prevent the steaming of moisture
Hair, sustained response 50 minutes；The vinylon fibre being modified is taken out, is sufficiently rinsed with water, removal remains in the modification on fiber
Liquid puts baking oven drying into later to get Epicholorohydrin-dimethylamine Cationic Polymer surface grafting vinylon fibre.
Embodiment 7 prepares cationic polymer surface grafting vinylon fibre
Steps are as follows:
(1) Epicholorohydrin-dimethylamine Cationic Polymer is prepared
Firstly, by 60 parts of dimethylamine agueous solutions (mass fraction 33%) and 5 parts of crosslinking agent triethylene tetramines in tetra- mouthfuls of 250ml
It mixes in flask, is stirred evenly in ice-water bath (0~10 DEG C)；40 parts of epoxychloropropane are placed in dropping funel again, slowly
(temperature remains at 10 DEG C hereinafter, time for adding is about 3.0 hours when dropwise addition) is added dropwise in flask；Epoxychloropropane is added dropwise
After, gradient increased temperature is to 80 DEG C, isothermal reaction 2.0 hours；Then 4 parts of sodium hydrate aqueous solution (mass fractions are added
20%), 0.5~1.0 hour after adding sodium hydroxide aqueous solution, the appearance of axis phenomenon is climbed, a small amount of water is added and is inhibited, until
No longer climb axis phenomenon；It is eventually adding hydrochloric acid and terminates reaction, and be adjusted to faintly acid (pH value 5) with hydrochloric acid, be then added appropriate
Methanol is precipitated and is filtered, and filtered product is dried in vacuo at 50 DEG C and is gathered to get epichlorohydrin-dimethylamine cation
Close object.
(2) cationic polymer aqueous solution is prepared
Epicholorohydrin-dimethylamine Cationic Polymer is taken, the cationic polymer that configuration quality concentration is 1% is water-soluble
The pH value of cationic polymer aqueous solution is adjusted to 12 with sodium hydrate aqueous solution under the measurement of acidometer by liquid.
(3) cationic polymer graft modification vinylon fibre
According in every rising Yang ionomer aqueous solution be added 4 grams of vinylon fibres ratio, by vinylon fibre be put into sun from
In sub- aqueous solutions of polymers, 70 DEG C are warming up to, wetting is impregnated on one side, stirs on one side, while paying attention to sealing, prevent the steaming of moisture
Hair, sustained response 70 minutes；The vinylon fibre being modified is taken out, is sufficiently rinsed with water, removal remains in the modification on fiber
Liquid puts baking oven drying into later to get Epicholorohydrin-dimethylamine Cationic Polymer surface grafting vinylon fibre.
Above-mentioned, although specific embodiments of the present invention have been described in conjunction with the embodiments, not protects to the present invention
The limitation of range, those skilled in the art should understand that, based on the technical solutions of the present invention, those skilled in the art
The various modifications or changes that can be made are not needed to make the creative labor still within protection scope of the present invention.
Claims (8)
1. a kind of preparation method of cationic polymer surface grafting vinylon fibre, it is characterised in that: take epoxychloropropane-diformazan
Amine cation polymer adds water to be configured to the cationic polymer aqueous solution that mass concentration is 0.8%~1.2%, and hydrogen-oxygen is added
Change sodium solution and adjusts pH value to 12 ± 0.5；Vinylon fibre is added, is warming up to 70 DEG C ± 3 DEG C, stirring makes its infiltration, insulation reaction
40~80 minute hour took out, and was sufficiently rinsed with water, dried to get cationic polymer surface grafting vinylon fibre；The sun
The amount ratio of ionomer aqueous solution and vinylon fibre are as follows: 2~5 grams of polyvinyl fibres are added in every rising Yang ionomer aqueous solution
Dimension；
The Epicholorohydrin-dimethylamine Cationic Polymer is made from the following raw materials in parts by weight: 40~60 parts of diformazans
Amine aqueous solution, 2~7 parts of crosslinking agents, 30~50 parts of epoxychloropropane, 2~5 parts of sodium hydrate aqueous solutions；It is by the following method
It is prepared: the dimethylamine agueous solution that mass fraction is 30%~35% being mixed with crosslinking agent, is placed in ice-water bath, stir
Uniformly, epoxychloropropane is slowly added dropwise；After being added dropwise, it is warming up to 80 DEG C ± 3 DEG C, isothermal reaction 1.5~2.5 hours；Again plus
Enter the sodium hydrate aqueous solution that mass fraction is 17%~23%, occur within 0.5~1.0 hour after addition climbing axis phenomenon, is added few
Amount water inhibits until no longer climbing axis phenomenon；Be added hydrochloric acid terminate reaction, and use salt acid for adjusting pH to 5~6, addition methanol,
Precipitating filters, dry, obtains Epicholorohydrin-dimethylamine Cationic Polymer.
2. the preparation method of cationic polymer surface grafting vinylon fibre according to claim 1, it is characterised in that: sun
Ionomer carries out under air-proof condition with reacting for vinylon fibre.
3. the preparation method of cationic polymer surface grafting vinylon fibre according to claim 1, it is characterised in that: institute
It states crosslinking agent and is selected from ethylenediamine, hexamethylene diamine, diethylenetriamine, triethylene tetramine.
4. the preparation method of cationic polymer surface grafting vinylon fibre according to claim 1, it is characterised in that: institute
Epicholorohydrin-dimethylamine Cationic Polymer is stated, is made from the following raw materials in parts by weight: 50 parts of dimethylamine agueous solutions, 3
Part diethylenetriamine, 40 parts of epoxychloropropane, 3 parts of sodium hydrate aqueous solutions；It is prepared by the following method to obtain: by quality
The dimethylamine agueous solution that score is 33% is mixed with crosslinking agent, is placed in ice-water bath, is stirred evenly, epoxy chloropropionate is slowly added dropwise
Alkane；After being added dropwise, it is warming up to 80 DEG C, isothermal reaction 2.0 hours；It is water-soluble to add the sodium hydroxide that mass fraction is 20%
Liquid occurs climbing axis phenomenon for 0.5~1.0 hour after addition, and a small amount of water is added and inhibits until no longer climbing axis phenomenon；Hydrochloric acid is added
Reaction is terminated, and uses salt acid for adjusting pH to 5~6, methanol is added, is precipitated, is filtered, it is dry, it is positive to obtain epichlorohydrin-dimethylamine
Ionomer.
5. the preparation method of cationic polymer surface grafting vinylon fibre according to claim 1, it is characterised in that: take
Epicholorohydrin-dimethylamine Cationic Polymer adds water to be configured to the cationic polymer aqueous solution that mass concentration is 1%, adds
Enter sodium hydroxide solution and adjusts pH value to 12；Vinylon fibre is added, is warming up to 70 DEG C, stirring makes its infiltration, and insulation reaction 60 is divided
Clock hour takes out, and is sufficiently rinsed with water to remove the cationic polymer remained on fiber, is dried to get cationic polymerization
Object surface grafting vinylon fibre；The amount ratio of the cationic polymer aqueous solution and vinylon fibre are as follows: every rising Yang ionic polymerization
2~5 grams of vinylon fibres are added in object aqueous solution.
6. utilizing the preparation method system of cationic polymer surface grafting vinylon fibre described in any one of Claims 1 to 55
Standby obtained cationic polymer surface grafting vinylon fibre.
7. cationic polymer surface grafting vinylon fibre as claimed in claim 6 is preparing the application in fracturing fluid.
8. cationic polymer surface grafting vinylon fibre as claimed in claim 6 is increasing the viscosity of fracturing fluid system, is improving
Application in the solid-carrying performance of fracturing fluid system and/or the reflux of inhibition proppant.
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