CN105949514B - The preparation method of nano-cellulose used in a kind of flexible screen host material - Google Patents
The preparation method of nano-cellulose used in a kind of flexible screen host material Download PDFInfo
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- CN105949514B CN105949514B CN201610284062.9A CN201610284062A CN105949514B CN 105949514 B CN105949514 B CN 105949514B CN 201610284062 A CN201610284062 A CN 201610284062A CN 105949514 B CN105949514 B CN 105949514B
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L1/00—Compositions of cellulose, modified cellulose or cellulose derivatives
- C08L1/02—Cellulose; Modified cellulose
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J3/00—Processes of treating or compounding macromolecular substances
- C08J3/24—Crosslinking, e.g. vulcanising, of macromolecules
- C08J3/246—Intercrosslinking of at least two polymers
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L5/00—Compositions of polysaccharides or of their derivatives not provided for in groups C08L1/00 or C08L3/00
- C08L5/08—Chitin; Chondroitin sulfate; Hyaluronic acid; Derivatives thereof
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- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2301/00—Characterised by the use of cellulose, modified cellulose or cellulose derivatives
- C08J2301/02—Cellulose; Modified cellulose
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2305/00—Characterised by the use of polysaccharides or of their derivatives not provided for in groups C08J2301/00 or C08J2303/00
- C08J2305/08—Chitin; Chondroitin sulfate; Hyaluronic acid; Derivatives thereof
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Abstract
Preparation method the invention discloses nano-cellulose used in a kind of flexible screen host material is using bagasse brown stock and chitosan as raw material, bagasse brown stock is dissolved in break up after water, suspension is made, mixed acid is added thereto, the suspension of high-crystallinity is made after reaction, solid content is washed after centrifugation, it is handled using high pressure ultrasound homogenizer, obtain nano cellulose crystal suspension slurry, potassium metaperiodate is added into the slurry that suspends and carries out oxidation processes, obtains modified nanometer cellulose suspension slurry.Chitosan saturated solution is made in chitosan raw material after acetic acid low-temperature treatment, and nano-scale chitosan is made through ultrasonic atomizatio freezing processing.Nano-scale chitosan is suspended with modified nano-cellulose after slurry mixes crosslinking, a kind of composite nano fiber element is made.Bagasse bleached pulp selected by the present invention and two kinds of raw material resources of chitosan are rich and easy to get, have good biological degradability, are conducive to environmental protection and offal treatment, and the composite nano fiber element of preparation can be used for making flexible screen host material.
Description
Technical field
The invention belongs to lignocellulose raw material higher value application technical field, specifically a kind of flexible screen host material institute
With the preparation method of nano-cellulose.
Background technology
Flexible screen (OLED), compared with conventional screen have volume is lighter, power consumption is lower, continuation of the journey when longer and robustness
More high advantage.The successful volume production of flexible screen will bring the development of high-end smartphones of new generation and wearable device
Far-reaching influence.According to the report of IHS companies " flexible display technologies and market prediction ", it is contemplated that the year two thousand twenty flexible display it is complete
Ball shipment amount will increase to 7.92 hundred million, and 2013 only have 3,200,000.Same period entirety operating income will be from trivial 100,000 dollars of plays
Increase to 41,300,000,000 dollars.
Screen base is the key component of production flexibility screen, to the more demanding of its performance.Flexible OLED is put down with common
The maximum difference of plate OLED is exactly that substrate is different with the material of packed part, and the material of traditional OLED is glass, flexible at present
Oled substrate is coated with electrically conducting transparent (positive electrode) film using tens to hundreds of microns, usually tin indium oxide (ITO)
Polyethylene terephthalate (PET) plastic foil of film.But the panel of plastic material is strong in addition to drop resistant ability, can be bent folding
Folded outer, the property reformed is not promoted for manufacture craft and substrate performance.Study at present successful OLED base materials there is also efficiency, the service life,
The deficiency of the several respects such as process operability and cost.In addition, traditional flexible screen base material is super due to that need to pass through in production process
High-temperature heating or containing certain noxious material, and it is discarded after deposit under natural environment and degrade very slowly, need
More than years up to ten thousand, subsequent recovery needs industry degradation.
It is concentrated mainly on the performances such as efficiency and the service life for improving device for the basic research of flexible screen and finds new
, on improved material.Since the coefficient of thermal expansion of traditional polymer plastic supporting base is relatively high, the life based on nano-cellulose
Object laminated film substrate has the advantages that coefficient of thermal expansion is low, visible light transmittance is high and flex capability is good, environmentally friendly
It is used as flexible screen base material, extensive concern is caused in the application of organic photoelectric subdomains.
Invention content
The object of the present invention is to provide a kind of preparation methods of nano-cellulose used in flexible screen host material.
The technical solution that the present invention solves above-mentioned technical problem is as follows：
The preparation method of nano-cellulose used in a kind of flexible screen host material is original with bagasse brown stock and chitosan
Bagasse brown stock, is dissolved in breaing up after water suspension is made by material first, and mixed acid is then added thereto, high knot is made after reaction
The suspension of brilliant degree.Solid content is washed after centrifugation, then it is handled using high pressure ultrasound homogenizer, is received
Rice cellulose crystals, which suspend, to be starched, and potassium metaperiodate, which is added, into the slurry that suspends carries out oxidation processes, obtains modified nanometer cellulose and suspends
Slurry.Chitosan saturated solution is made in chitosan raw material after acetic acid low-temperature treatment, is then made and receives through ultrasonic atomizatio freezing processing
Meter level chitosan.The nano-scale chitosan and modified the nano-cellulose slurry that suspends mixs and is made that one kind is compound to be received after crosslinking
Rice cellulose.
The mixed acid of the addition is mixed by sulfuric acid and trifluoroacetic acid, weight ratio 30:1~1.2.
The temperature of the chitosan raw material through acetic acid low-temperature treatment is 3~7 DEG C.
Advantages of the present invention：
Bagasse bleached pulp selected by the present invention and two kinds of raw material resources of chitosan are more rich and easy to get, and have good life
Object degradability, is conducive to environmental protection and offal treatment, and the composite nano fiber element of preparation can be used for making flexible screen base
Material.
Specific implementation mode
With reference to embodiment, the invention will be further described.
Embodiment 1
The preparation method of nano-cellulose used in a kind of flexible screen host material：
Using bagasse brown stock and chitosan as raw material, first bagasse brown stock is dissolved in break up after water suspension is made, so
It is 30 to be added thereto afterwards by weight ratio:The mixed acid that 1 sulfuric acid and trifluoroacetic acid mixes, high-crystallinity is made after reaction
Suspension.Solid content is washed after centrifugation, then it is handled using high pressure ultrasound homogenizer, obtains Nanowire
It ties up cellulose crystal suspension to starch, potassium metaperiodate progress oxidation processes is added into the slurry that suspends, obtain modified nanometer cellulose suspension slurry.Shell
Chitosan saturated solution is made after acetic acid is handled under 3 DEG C of low temperature in glycan raw material, is then made through ultrasonic atomizatio freezing processing
Nano-scale chitosan.It is made after the nano-scale chitosan is mixed crosslinking with modified nano-cellulose suspension slurry a kind of compound
Nano-cellulose.
Embodiment 2
The preparation method of nano-cellulose used in a kind of flexible screen host material：
Using bagasse brown stock and chitosan as raw material, first bagasse brown stock is dissolved in break up after water suspension is made, so
It is 30 to be added thereto afterwards by weight ratio:The mixed acid that 1.1 sulfuric acid and trifluoroacetic acid mixes, is made highly crystalline after reaction
The suspension of degree.Solid content is washed after centrifugation, then it is handled using high pressure ultrasound homogenizer, obtains nanometer
Cellulose crystals, which suspend, to be starched, and potassium metaperiodate, which is added, into the slurry that suspends carries out oxidation processes, obtains modified nanometer cellulose suspension slurry.
Chitosan saturated solution is made after acetic acid is handled under 5 DEG C of low temperature in chitosan raw material, then through ultrasonic atomizatio freezing processing system
Obtain nano-scale chitosan.The nano-scale chitosan is suspended with modified nano-cellulose after slurry mixes crosslinking, one kind is made again
Close nano-cellulose.
Embodiment 3
The preparation method of nano-cellulose used in a kind of flexible screen host material：
Using bagasse brown stock and chitosan as raw material, first bagasse brown stock is dissolved in break up after water suspension is made, so
It is 30 to be added thereto afterwards by weight ratio:The mixed acid that 1.2 sulfuric acid and trifluoroacetic acid mixes, is made highly crystalline after reaction
The suspension of degree.Solid content is washed after centrifugation, then it is handled using high pressure ultrasound homogenizer, obtains nanometer
Cellulose crystals, which suspend, to be starched, and potassium metaperiodate, which is added, into the slurry that suspends carries out oxidation processes, obtains modified nanometer cellulose suspension slurry.
Chitosan saturated solution is made after acetic acid is handled under 7 DEG C of low temperature in chitosan raw material, then through ultrasonic atomizatio freezing processing system
Obtain nano-scale chitosan.The nano-scale chitosan is suspended with modified nano-cellulose after slurry mixes crosslinking, one kind is made again
Close nano-cellulose.
Claims (1)
1. a kind of purposes of composite nano fiber element in flexible screen host material, it is characterised in that：With bagasse brown stock and
Chitosan is raw material, is dissolved in breaing up after water by bagasse brown stock first suspension is made, and mixed acid is then added thereto, is reacted
The suspension of high-crystallinity is made afterwards, solid content is washed after suspension centrifugation, then utilizes high pressure ultrasound homogenizer pair
It is handled, and nano cellulose crystal suspension slurry is obtained, and potassium metaperiodate progress oxidation processes are added into the slurry that suspends, are changed
Property nano-cellulose suspend slurry；Chitosan saturated solution is made in chitosan raw material after acetic acid low-temperature treatment, then through ultrasonic mist
Change freezing processing and nano-scale chitosan is made；The nano-scale chitosan is suspended to starch with modified nano-cellulose and mixes crosslinking
After a kind of composite nano fiber element is made；The mixed acid is mixed by sulfuric acid and trifluoroacetic acid, weight ratio 30:1~
1.2；The temperature of the chitosan raw material through acetic acid low-temperature treatment is 3~7 DEG C.
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| CN107141436A (en) * | 2017-07-12 | 2017-09-08 | 合肥东恒锐电子科技有限公司 | A kind of preparation method of novel electronic product flexible screen base material |
| CN108399964B (en) * | 2018-01-22 | 2019-12-27 | 上海弗艾柏生物科技有限公司 | Preparation method of graphene conductive film based on nano microcrystalline cellulose substrate |
| CN110591169B (en) * | 2019-09-30 | 2022-04-05 | 台州学院 | Sugarcane fiber/chitosan composite film for food packaging and preparation method thereof |
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| CN104558677B (en) * | 2015-02-05 | 2018-03-09 | 东北林业大学 | A kind of preparation method of nano-cellulose/chitosan composite foam |
| CN105498709A (en) * | 2015-12-16 | 2016-04-20 | 郑州大学 | High-strength dialdehyde microfibrillar cellulose/chitosan composite membrane and preparation method and application thereof |
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