CN106854843A - A kind of nano-TiO2The preparation method of modified cellulose insulating paper - Google Patents

A kind of nano-TiO2The preparation method of modified cellulose insulating paper Download PDF

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Publication number
CN106854843A
CN106854843A CN201510897733.4A CN201510897733A CN106854843A CN 106854843 A CN106854843 A CN 106854843A CN 201510897733 A CN201510897733 A CN 201510897733A CN 106854843 A CN106854843 A CN 106854843A
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China
Prior art keywords
nano
tio
paper
preparation
insulating paper
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CN201510897733.4A
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Chinese (zh)
Inventor
高飞
李金忠
徐征宇
廖瑞金
袁媛
杨丽君
何利华
鄢水强
吕程
程涣超
汪可
刘雪丽
赵晓宇
遇心如
关健昕
王健
王健一
汤浩
吴超
赵志刚
孙建涛
申泽军
郭锐
赵海博
贾鹏飞
邓俊宇
仇宇舟
张亚楠
苗艳敏
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Chongqing University
State Grid Corp of China SGCC
State Grid Zhejiang Electric Power Co Ltd
China Electric Power Research Institute Co Ltd CEPRI
Original Assignee
Chongqing University
State Grid Corp of China SGCC
State Grid Zhejiang Electric Power Co Ltd
China Electric Power Research Institute Co Ltd CEPRI
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Application filed by Chongqing University, State Grid Corp of China SGCC, State Grid Zhejiang Electric Power Co Ltd, China Electric Power Research Institute Co Ltd CEPRI filed Critical Chongqing University
Priority to CN201510897733.4A priority Critical patent/CN106854843A/en
Publication of CN106854843A publication Critical patent/CN106854843A/en
Pending legal-status Critical Current

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    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21D—TREATMENT OF THE MATERIALS BEFORE PASSING TO THE PAPER-MAKING MACHINE
    • D21D1/00—Methods of beating or refining; Beaters of the Hollander type
    • D21D1/02—Methods of beating; Beaters of the Hollander type
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
    • D21H17/00—Non-fibrous material added to the pulp, characterised by its constitution; Paper-impregnating material characterised by its constitution
    • D21H17/63—Inorganic compounds
    • D21H17/67—Water-insoluble compounds, e.g. fillers, pigments
    • D21H17/69—Water-insoluble compounds, e.g. fillers, pigments modified, e.g. by association with other compositions prior to incorporation in the pulp or paper
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21J—FIBREBOARD; MANUFACTURE OF ARTICLES FROM CELLULOSIC FIBROUS SUSPENSIONS OR FROM PAPIER-MACHE
    • D21J1/00—Fibreboard
    • D21J1/06—Drying
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21J—FIBREBOARD; MANUFACTURE OF ARTICLES FROM CELLULOSIC FIBROUS SUSPENSIONS OR FROM PAPIER-MACHE
    • D21J1/00—Fibreboard
    • D21J1/10—After-treatment
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21J—FIBREBOARD; MANUFACTURE OF ARTICLES FROM CELLULOSIC FIBROUS SUSPENSIONS OR FROM PAPIER-MACHE
    • D21J1/00—Fibreboard
    • D21J1/16—Special fibreboard
    • D21J1/20—Insulating board

Abstract

The present invention provides a kind of nano-TiO2The preparation method of modified cellulose insulating paper, the preparation method comprises the following steps：1) paper pulp suspension is prepared；2) nano-TiO2It is prepared by solution；3) nano-TiO2It is blended with paper pulp；4) shaping and press polish of insulating paper.The present invention is by adding nano-TiO2Particle is modified to insulating paper, nano-TiO2Particle is combined closely with cellulose, improves the power frequency disruptive field intensity of insulating paper, and tensile strength is unchanged, and the modified insulating paper formula of the present invention is simple, Nano filling low cost, and preparation method is simple, easily operated.

Description

A kind of nano-TiO2The preparation method of modified cellulose insulating paper
Technical field
The present invention relates to a kind of insulation of electrical installation material, and in particular to a kind of nano-TiO2Modified cellulose insulating paper Preparation method.
Background technology
Cellulose insulation paper is transformer insulated important materials in oil-filled transformer.Oneself is through developing various conjunctions at present Into the insulating paper of fiber, have with excellent resistance to heat aging, have with good mechanical performance, have with very Good insulating properties, but native cellulose insulating paper is can not show a candle to, for example：Relative dielectric constant is too high, causes transformer Internal field intensity irrational distribution；With the poor compatibility of insulating oil, it is impossible to which enough dippings or dipping can not thoroughly cause presence A large amount of bubbles；Mechanical performance is not enough, and long-term use can soften；Or expensive be not suitable for large-scale use.It is fine The plain insulating paper of dimension has good immersion and suitable tensile strength, but its power frequency disruptive field intensity need to be improved.
Nano-TiO2Inside particles have good chemical stability and a heat endurance, and nontoxic and with Superhydrophilic The features such as.Nano-TiO2Inside be the complete crystal structure being made up of Ti atoms and O atom, outside is with not The surface of saturation titanium ion, due to Ti-O keys and imbalance, so with stronger polarity.Research thinks, nanometer TiO2By after the irradiation of ultraviolet light, nano-TiO2In valence-band electrons be easily excited to conduction band, the electronics of generation Can be to TiO with hole2Surface is moved, in TiO2Surface produces hole-electron pair, and the titanium atom of positive tetravalence will be with electronics The titanium of the positive trivalent of reaction generation, TiO2The oxygen bridge ion on surface and hole react generation Lacking oxygen.Due to nanometer TiO2The missing of surface titanium atom coordination easily adsorbs water, and its surface adsorption water is easily dissociated and is adsorbed by Lacking oxygen, Form surface hydroxyl.
Nano-TiO2Big specific surface area, its surface can produce substantial amounts of hydroxyl, and this is have a large amount of hydroxyls with surface The cellulose of base is combined closely there is provided condition, it is ensured that nano-TiO2Adhesive rate on cellulose.In addition, grinding Study carefully and show, nano-TiO2Insulating properties to insulating oil can play preferably effect, and its is cheap.
The content of the invention
It is an object of the invention to provide a kind of nano-TiO2The preparation method of modified cellulose insulating paper.For existing skill The deficiency of art, by adding nano-TiO2Particle is modified to insulating paper, nano-TiO2Particle is tight with cellulose With reference to, the power frequency disruptive field intensity of insulating paper is improve, and tensile strength is unchanged, formula is simple, Nano filling low cost, Preparation method is simple, easily operated.
To achieve these goals, the present invention takes following technical scheme：
A kind of nano-TiO2The preparation method of modified cellulose insulating paper, the preparation method comprises the following steps：
1) paper pulp suspension is prepared：Dissociated the pulpboard soaked through deionized water, mashing to 15-90 ° of SR with deionized water Beating degree, obtains paper pulp suspension；
2) nano-TiO2It is prepared by solution：To the nano-TiO being scattered in deionized water2Magnetic agitation 5-60min；
3) nano-TiO2It is blended with paper pulp：By step 1) and step 2) obtained by material mixing, with 100-500r/min The speed stirring 5-30min systems TiO containing 1-4% by mass percentage2Paper pulp；
4) shaping and press polish of insulating paper：In step 3) gained mixed liquor in add 4-6L deionized waters, stirring, 5-30min is stood, paper pulp filtering, heating and vacuum filtration 5-8min must be molded paper, closed 12-48h, press polish.
Described nano-TiO2First optimal technical scheme of the preparation method of modified cellulose insulating paper, step 1) institute It is the fritter of 1cm × 1cm by slurry degradation before stating mashing, discongests 5-12min.
Described nano-TiO2Second optimal technical scheme of the preparation method of modified cellulose insulating paper, step 1) institute Beating degree is stated for 45 ° of SR.
Described nano-TiO23rd optimal technical scheme of the preparation method of modified cellulose insulating paper, step 1) institute State and dissociated again after after paper pulp sinking when being dissociated into 1200~1500 turns of dissociation, repeat this operation 8~15 times.
Described nano-TiO24th optimal technical scheme of the preparation method of modified cellulose insulating paper, step 2) institute State nano-TiO2The concentration of solution is 0.001~0.02g/ml.
Described nano-TiO25th optimal technical scheme of the preparation method of modified cellulose insulating paper, step 3) institute State nano-TiO2Quality is the 2-3% of paper pulp gross mass.
Described nano-TiO26th optimal technical scheme of the preparation method of modified cellulose insulating paper, step 3) institute State nano-TiO2Amount for paper pulp gross mass 3%.
Described nano-TiO27th optimal technical scheme of the preparation method of modified cellulose insulating paper, step 4) institute The temperature for stating shaping is 100~120 DEG C.
Described nano-TiO28th optimal technical scheme of the preparation method of modified cellulose insulating paper, the shaping Temperature be 110 DEG C.
Described nano-TiO29th optimal technical scheme of the preparation method of modified cellulose insulating paper, step 4) institute Press polish pressure is stated for 4-4.5MPa.
With immediate prior art ratio, the present invention has the advantages that：
1) present invention is by adding nano-TiO2Particle is modified to insulating paper, nano-TiO2Particle and cellulose Combine closely, improve the power frequency disruptive field intensity of insulating paper, TiO2When content is 3%, the power frequency of modified insulating paper is hit Field intensity highest is worn, 20.81% is improve, while tensile strength does not have significant change；
2) the modified insulating paper of the present invention is formulated simple, Nano filling low cost, and preparation method is simple, easily operated.
Brief description of the drawings
Fig. 1：Nano-TiO2Influence of the content to power frequency disruptive field intensity；
Fig. 2：Nano-TiO2Influence of the content to tensile strength.
Specific embodiment
The present invention is further described with reference to specific embodiment and accompanying drawing, but the present invention is not limited to following implementation Example.
Embodiment 1
A kind of nano-TiO2The preparation method of modified cellulose insulating paper, step is as follows：
1) paper pulp suspension is prepared：Pulpboard 530g is weighed, is put into a clean container equipped with 6L deionized waters After immersion 4 hours, first to addition 6L deionized waters in the tank of beater.Slurry is torn into about 1cm × 1cm × 1cm Fritter be put into tank, start to discongest, time control start after 8 minutes mashing.Periodically use Xiao's Bai Shi Schooper-Riegler beating degree testers Measurement beating degree.Stop mashing when the beating degree of slurry is to 45 ° of SR, after mashing terminates, connect with special cloth bag Firmly paper pulp, then slowly extrudes the moisture in paper pulp, the paper pulp after being beaten.Paper pulp is put into the modeling of sealing Equilibrium water conten 24 hours in pocket；
The weight 15g of wet pulp is weighed, is put into dissociation device, add deionized water to three/2nd point of dissociation device Two position.Start dissociation, when counter revolution shows 1200 turns, stop dissociation, under waiting all paper pulp all Restart dissociation device after heavy to be dissociated, repeat 8 times.
2) preparation of l Water Paper：Fiber after dissociation is poured into storage slurry room, 6L deionized waters is added, with perforaled plate Lower agitation slurry is several times so that slurry is evenly distributed in storage slurry room, static 15 minutes, and observation fiber is in mixed solution In without significantly moving after, start drainage, paper pulp, on surface, is formed l Water Paper by strainer filtering.
3) shaping and press polish of insulating paper：Heated using the vacuum hotpressing part of pattern former, temperature is set It is set to 110 DEG C, after temperature is increased to 110 DEG C, two sides is all covered with the l Water Paper of calico and is put into vacuum drying device, Sample is heated and vacuum filtration.Insulating paper is taken out after drying about 5 minutes, weighing is put into standby in sample sack After with the shaping of, paper, in putting it into closed sample sack, placement allows its voluntarily equilibrium water conten for 24 hours；
Press polish is carried out using vulcanizing press, paper is disk, area 0.0314m2, press polish pressure is 4.5MPa, Finally give finished paper.
Embodiment 2
A kind of nano-TiO2The preparation method of modified cellulose insulating paper, step is as follows：
1) paper pulp suspension is prepared：Pulpboard 530g is weighed, is put into a clean container equipped with 6L deionized waters After immersion 4 hours, first to addition 6L deionized waters in the tank of beater.Slurry is torn into about 1cm × 1cm × 1cm Fritter be put into tank, start to discongest, time control start after 8 minutes mashing.Periodically use Xiao's Bai Shi Schooper-Riegler beating degree testers Measurement beating degree.Stop mashing when the beating degree of slurry is to 45 ° of SR, after mashing terminates, connect with special cloth bag Firmly paper pulp, then slowly extrudes the moisture in paper pulp, the paper pulp after being beaten.Paper pulp is put into the modeling of sealing Equilibrium water conten 24 hours in pocket；
The weight 15g of wet pulp is weighed, is put into dissociation device, addition deionized water to dissociation device 1 to three/3rd/ Two position.Start dissociation, when counter revolution shows 1200 turns, stop dissociation, wait all paper pulp all to sink After restart dissociation device and dissociated, repeat 8 times.
2) nano-TiO2It is prepared by solution：Weigh the nano-TiO of mass percent 1%2It is added to going equipped with 500ml In ionized water, and with magnetic stirrer 30 minutes.By scattered nano-TiO2After the aqueous solution is added to dissociation Paper pulp suspension in, be then stirred 30 minutes with 100 revs/min of speed.In visually observing mixed slurry Without the paper pulp fiber and lamination that significantly build up.
3) nano-TiO2It is blended with paper pulp：By fiber and nano-TiO after dissociation2Mixed solution pour into storage slurry room. 6L deionized waters are added, slurry is stirred up and down several times with perforaled plate so that slurry is evenly distributed in storage slurry room, static 15 minutes, observation fiber started drainage after no significantly motion in mixed solution, and paper pulp is existed by strainer filtering Surface, is formed l Water Paper.
4) shaping and press polish of insulating paper：Heated using the vacuum hotpressing part of pattern former, temperature is set It is set to 110 DEG C, after temperature is increased to 110 DEG C, two sides is all covered with the l Water Paper of calico and is put into vacuum drying device, Sample is heated and vacuum filtration.Insulating paper is taken out after drying about 5 minutes, weighing is put into standby in sample sack After with the shaping of, paper, in putting it into closed sample sack, placement allows its voluntarily equilibrium water conten for 24 hours；
Press polish is carried out using vulcanizing press, paper is disk, area 0.0314m2, press polish pressure is 4.5MPa, Finally give finished paper.
Embodiment 3
A kind of nano-TiO2The preparation method of modified cellulose insulating paper, step is as follows：
1) paper pulp suspension is prepared：Pulpboard 530g is weighed, is put into a clean container equipped with 6L deionized waters After immersion 4 hours, first to addition 6L deionized waters in the tank of beater.Slurry is torn into about 1cm × 1cm × 1cm Fritter be put into tank, start to discongest, time control start after 8 minutes mashing.Periodically use Xiao's Bai Shi Schooper-Riegler beating degree testers Measurement beating degree.Stop mashing when the beating degree of slurry is to 45 ° of SR, after mashing terminates, connect with special cloth bag Firmly paper pulp, then slowly extrudes the moisture in paper pulp, the paper pulp after being beaten.Paper pulp is put into the modeling of sealing Equilibrium water conten 24 hours in pocket；
The weight 15g of wet pulp is weighed, is put into dissociation device, addition deionized water to dissociation device 1 to three/3rd/ Two position.Start dissociation, when counter revolution shows 1200 turns, stop dissociation, wait all paper pulp all to sink After restart dissociation device and dissociated, repeat 8 times.
2) nano-TiO2It is prepared by solution：Weigh the nano-TiO of mass percent 2%2It is added to going equipped with 500ml In ionized water, and with magnetic stirrer 30 minutes.By scattered nano-TiO2After the aqueous solution is added to dissociation Paper pulp suspension in, be then stirred 30 minutes with 100 revs/min of speed.In visually observing mixed slurry Without the paper pulp fiber and lamination that significantly build up.
3) nano-TiO2It is blended with paper pulp：By fiber and nano-TiO after dissociation2Mixed solution pour into storage slurry room. 6L deionized waters are added, slurry is stirred up and down several times with perforaled plate so that slurry is evenly distributed in storage slurry room, static 15 minutes, observation fiber started drainage after no significantly motion in mixed solution, and paper pulp is existed by strainer filtering Surface, is formed l Water Paper.
4) shaping and press polish of insulating paper：Heated using the vacuum hotpressing part of pattern former, temperature is set It is set to 110 DEG C, after temperature is increased to 110 DEG C, two sides is all covered with the l Water Paper of calico and is put into vacuum drying device, Sample is heated and vacuum filtration.Insulating paper is taken out after drying about 5 minutes, weighing is put into standby in sample sack After with the shaping of, paper, in putting it into closed sample sack, placement allows its voluntarily equilibrium water conten for 24 hours；
Press polish is carried out using vulcanizing press, paper is disk, area 0.0314m2, press polish pressure is 4.5MPa, Finally give finished paper.
Embodiment 4
A kind of nano-TiO2The preparation method of modified cellulose insulating paper, step is as follows：
1) paper pulp suspension is prepared：Pulpboard 530g is weighed, is put into a clean container equipped with 6L deionized waters After immersion 4 hours, first to addition 6L deionized waters in the tank of beater.Slurry is torn into about 1cm × 1cm × 1cm Fritter be put into tank, start to discongest, time control start after 8 minutes mashing.Periodically use Xiao's Bai Shi Schooper-Riegler beating degree testers Measurement beating degree.Stop mashing when the beating degree of slurry is to 45 ° of SR, after mashing terminates, connect with special cloth bag Firmly paper pulp, then slowly extrudes the moisture in paper pulp, the paper pulp after being beaten.Paper pulp is put into the modeling of sealing Equilibrium water conten 24 hours in pocket；
The weight 15g of wet pulp is weighed, is put into dissociation device, addition deionized water to dissociation device 1 to three/3rd/ Two position.Start dissociation, when counter revolution shows 1200 turns, stop dissociation, wait all paper pulp all to sink After restart dissociation device and dissociated, repeat 8 times.
2) nano-TiO2It is prepared by solution：The nano-TiO that mass percent is 3% is weighed respectively2It is added to equipped with 500ml Deionized water in, and with magnetic stirrer 30 minutes.By scattered nano-TiO2The aqueous solution is added to solution In paper pulp suspension after, then it is stirred 30 minutes with 100 revs/min of speed.Visually observe mixing slurry Without the paper pulp fiber and lamination for significantly building up in material.
3) nano-TiO2It is blended with paper pulp：By fiber and nano-TiO after dissociation2Mixed solution pour into storage slurry room. 6L deionized waters are added, slurry is stirred up and down several times with perforaled plate so that slurry is evenly distributed in storage slurry room, static 15 minutes, observation fiber started drainage after no significantly motion in mixed solution, and paper pulp is existed by strainer filtering Surface, is formed l Water Paper.
4) shaping and press polish of insulating paper：Heated using the vacuum hotpressing part of pattern former, temperature is set It is set to 110 DEG C, after temperature is increased to 110 DEG C, two sides is all covered with the l Water Paper of calico and is put into vacuum drying device, Sample is heated and vacuum filtration.Insulating paper is taken out after drying about 5 minutes, weighing is put into standby in sample sack After with the shaping of, paper, in putting it into closed sample sack, placement allows its voluntarily equilibrium water conten for 24 hours；
Press polish is carried out using vulcanizing press, paper is disk, area 0.0314m2, press polish pressure is 4.5MPa, Finally give finished paper.
Embodiment 5
A kind of nano-TiO2The preparation method of modified cellulose insulating paper, step is as follows：
1) paper pulp suspension is prepared：Pulpboard 530g is weighed, is put into a clean container equipped with 6L deionized waters After immersion 4 hours, first to addition 6L deionized waters in the tank of beater.Slurry is torn into about 1cm × 1cm × 1cm Fritter be put into tank, start to discongest, time control start after 8 minutes mashing.Periodically use Xiao's Bai Shi Schooper-Riegler beating degree testers Measurement beating degree.Stop mashing when the beating degree of slurry is to 45 ° of SR, after mashing terminates, connect with special cloth bag Firmly paper pulp, then slowly extrudes the moisture in paper pulp, the paper pulp after being beaten.Paper pulp is put into the modeling of sealing Equilibrium water conten 24 hours in pocket；
The weight 15g of wet pulp is weighed, is put into dissociation device, addition deionized water to dissociation device 1 to three/3rd/ Two position.Start dissociation, when counter revolution shows 1200 turns, stop dissociation, wait all paper pulp all to sink After restart dissociation device and dissociated, repeat 8 times.
2) nano-TiO2It is prepared by solution：The nano-TiO that mass percent is 4% is weighed respectively2It is added to equipped with 500ml Deionized water in, and with magnetic stirrer 30 minutes.By scattered nano-TiO2The aqueous solution is added to solution In paper pulp suspension after, then it is stirred 30 minutes with 100 revs/min of speed.Visually observe mixing slurry Without the paper pulp fiber and lamination for significantly building up in material.
3) nano-TiO2It is blended with paper pulp：By fiber and nano-TiO after dissociation2Mixed solution pour into storage slurry room. 6L deionized waters are added, slurry is stirred up and down several times with perforaled plate so that slurry is evenly distributed in storage slurry room, static 15 minutes, observation fiber started drainage after no significantly motion in mixed solution, and paper pulp is existed by strainer filtering Surface, is formed l Water Paper.
4) shaping and press polish of insulating paper：Heated using the vacuum hotpressing part of pattern former, temperature is set It is set to 110 DEG C, after temperature is increased to 110 DEG C, two sides is all covered with the l Water Paper of calico and is put into vacuum drying device, Sample is heated and vacuum filtration.Insulating paper is taken out after drying about 5 minutes, weighing is put into standby in sample sack After with the shaping of, paper, in putting it into closed sample sack, placement allows its voluntarily equilibrium water conten for 24 hours；
Press polish is carried out using vulcanizing press, paper is disk, area 0.0314m2, press polish pressure is 4.5MPa, Finally give finished paper.
Fig. 1 and Fig. 2 are surveyed to the power frequency disruptive field intensity and tensile strength of insulating paper obtained in embodiment 1-5 respectively It is fixed.As shown in Figure 1：Nano-TiO2When content is 0-3%, the power frequency disruptive field intensity of insulating paper is improved constantly, when receiving Rice TiO2When content is 4%, insulating paper power frequency disruptive field intensity starts to lower；Fig. 2 shows：Nano-TiO2Content is 1%th, 2%, 3% when, the tensile strength of insulating paper is not changed significantly, the dispersiveness of tensile strength experimental result Also it is essentially identical, but work as nano-TiO2The tensile strength of insulating paper drastically declines when the content of content is 4%, dispersiveness Also it is increased dramatically.Inferred according to experimental result, work as nano-TiO2When content increases to 4%, its dispersiveness is deteriorated, resistance Hinder the combination of itself and cellulose hydrogen bond, cause insulating paper degradation.
The above embodiments are merely illustrative of the technical solutions of the present invention rather than its limitations, the ordinary skill people of art Member it should be appreciated that can be modified to specific embodiment of the invention or equivalent with reference to above-described embodiment, These are applying for pending claim guarantor without departing from any modification of spirit and scope of the invention or equivalent Within the scope of shield.

Claims (10)

1. a kind of nano-TiO2The preparation method of modified cellulose insulating paper, it is characterised in that the preparation method bag Include following steps：
1) paper pulp suspension is prepared：Dissociated the pulpboard soaked through deionized water, mashing to 15-90 ° of SR with deionized water Beating degree, obtains paper pulp suspension；
2) nano-TiO2It is prepared by solution：To the nano-TiO being scattered in deionized water2Magnetic agitation 5-60min；
3) nano-TiO2It is blended with paper pulp：By step 1) and step 2) obtained by material mixing, with 100-500r/min The speed stirring 5-30min systems TiO containing 1-4% by mass percentage2Paper pulp；
4) shaping and press polish of insulating paper：In step 3) gained mixed liquor in add 4-6L deionized waters, stirring, 5-30min is stood, paper pulp filtering, heating and vacuum filtration 5-8min must be molded paper, closed 12-48h, press polish.
2. nano-TiO according to claim 12The preparation method of modified cellulose insulating paper, it is characterised in that Step 1) it is the block of 1cm × 1cm × 1cm by slurry degradation before the mashing, discongest 5-12min.
3. nano-TiO according to claim 12The preparation method of modified cellulose insulating paper, it is characterised in that Step 1) beating degree be 45 ° of SR.
4. nano-TiO according to claim 12The preparation method of modified cellulose insulating paper, it is characterised in that Step 1) it is described dissociated again after after paper pulp sinking when being dissociated into 1200~1500 turns of dissociation, repeat this operation 8~15 times.
5. nano-TiO according to claim 12The preparation method of modified cellulose insulating paper, it is characterised in that Step 2) nano-TiO2The concentration of solution is 0.0001~0.02g/ml.
6. nano-TiO according to claim 12The preparation method of modified cellulose insulating paper, it is characterised in that Step 3) nano-TiO2Quality is the 2-3% of paper pulp gross mass.
7. nano-TiO according to claim 62The preparation method of modified cellulose insulating paper, it is characterised in that Step 3) nano-TiO2Amount for paper pulp gross mass 3%.
8. nano-TiO according to claim 12The preparation method of modified cellulose insulating paper, it is characterised in that Step 4) shaping temperature be 100~120 DEG C.
9. nano-TiO according to claim 82The preparation method of modified cellulose insulating paper, it is characterised in that The temperature of the shaping is 110 DEG C.
10. nano-TiO according to claim 12The preparation method of modified cellulose insulating paper, its feature exists In step 4) the press polish pressure be 4-4.5MPa.
CN201510897733.4A 2015-12-08 2015-12-08 A kind of nano-TiO2The preparation method of modified cellulose insulating paper Pending CN106854843A (en)

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CN111856227A (en) * 2020-08-04 2020-10-30 江西理工大学 Method for improving thermal aging resistance of converter transformer oil paper insulation and testing method

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Application publication date: 20170616