CN105754123B - A method of preparing flexible screen host material - Google Patents

A method of preparing flexible screen host material Download PDF

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CN105754123B
CN105754123B CN201610284063.3A CN201610284063A CN105754123B CN 105754123 B CN105754123 B CN 105754123B CN 201610284063 A CN201610284063 A CN 201610284063A CN 105754123 B CN105754123 B CN 105754123B
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chitosan
cellulose
nano
flexible screen
host material
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CN105754123A (en
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聂双喜
宋雪萍
姜言
刘秀宇
冯成启
谢秋霞
陈兰
容贤健
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Guangxi University
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    • C08J5/00—Manufacture of articles or shaped materials containing macromolecular substances
    • C08J5/18—Manufacture of films or sheets
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
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    • 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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    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L1/00—Compositions of cellulose, modified cellulose or cellulose derivatives
    • C08L1/02—Cellulose; Modified cellulose
    • C08L1/04—Oxycellulose; Hydrocellulose, e.g. microcrystalline cellulose
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L33/00—Compositions of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and only one being terminated by only one carboxyl radical, or of salts, anhydrides, esters, amides, imides or nitriles thereof; Compositions of derivatives of such polymers
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
    • G09F9/00—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements
    • G09F9/30—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements in which the desired character or characters are formed by combining individual elements
    • G09F9/301—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements in which the desired character or characters are formed by combining individual elements flexible foldable or roll-able electronic displays, e.g. thin LCD, OLED
    • 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
    • C08J2301/00—Characterised by the use of cellulose, modified cellulose or cellulose derivatives
    • C08J2301/04—Oxycellulose; Hydrocellulose
    • 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
    • C08J2333/00—Characterised by the use of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and only one being terminated by only one carboxyl radical, or of salts, anhydrides, esters, amides, imides, or nitriles thereof; Derivatives of such polymers
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    • C08J2401/00—Characterised by the use of cellulose, modified cellulose or cellulose derivatives
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    • C08J2401/04—Oxycellulose; Hydrocellulose
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    • C08J2433/00—Characterised by the use of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and only one being terminated by only one carboxyl radical, or of salts, anhydrides, esters, amides, imides, or nitriles thereof; Derivatives of such polymers
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    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L2201/00—Properties
    • C08L2201/10—Transparent films; Clear coatings; Transparent materials
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Abstract

The invention discloses a kind of methods for preparing flexible screen host material, method is to select bagasse bleached pulp and chitosan as raw material, bagasse bleached pulp is modified using chemical method first and is prepared into dialdehyde nano-cellulose suspension, while chitosan is prepared into nano-scale chitosan.Use sodium peroxydisulfate as initiator, be crosslinked dialdehyde nano-cellulose and nanoscale chitosan, while the form of its chemical bonds is modified, obtains modified nanometer cellulose.Finally by the nano-cellulose of this modification and acrylic resin composite membrane-forming, a kind of host material for being used to prepare flexible screen is obtained.Advantages of the present invention: being influenced smaller by temperature fluctuation in flexible screen substrate of the present invention transparency with higher and surface flatness, good translucidus and comfort, use, flexibility is good；Raw material resources are more rich and easy to get, and have good biological degradability, are conducive to environmental protection and offal treatment.

Description

A method of preparing flexible screen host material
Technical field
It is specifically a kind of to prepare flexible screen matrix material the invention belongs to lignocellulose raw material higher value application technical field The method of material.
Background technique
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 company " 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 several hundred 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 substrate there is also efficiency, the service life, The deficiency of the several respects such as process operability and cost.In addition, traditional flexible screen substrate 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.Life since the thermal expansion coefficient of traditional polymer plastic supporting base is relatively high, based on nano-cellulose Object laminated film substrate has the advantages that thermal expansion coefficient is low, visible light transmittance is high and flex capability is good, environmentally friendly It is used as flexible screen substrate, causes extensive concern in the application of organic photoelectric subdomains.
Summary of the invention
The object of the present invention is to provide a kind of methods for preparing flexible screen host material.
The technical scheme to solve the above technical problems is that
A method of preparing flexible screen host material:
It selects bagasse bleached pulp and chitosan as raw material, preparation is modified to bagasse bleached pulp using chemical method first At dialdehyde nano-cellulose suspension, while chitosan is prepared into nano-scale chitosan.Use sodium peroxydisulfate as initiator, It is crosslinked dialdehyde nano-cellulose and nanoscale chitosan, while the form of its chemical bonds is modified, is obtained To modified nanometer cellulose.Finally by the nano-cellulose of this modification and acrylic resin composite membrane-forming, obtains one kind and be used for Prepare the host material of flexible screen.
The whiteness of the bagasse pulp is 90~92%ISO.
The initiator sodium peroxydisulfate additional amount is the 0.1%~3% of nano-scale chitosan weight.
It is 2%~3% that the dialdehyde nano-cellulose, which suspends and starches solid content,.
The weight ratio of the dialdehyde nano-cellulose and nanoscale chitosan in crosslinking is 5:0.7~1.
Advantages of the present invention:
Using flexible screen substrate produced by the invention transparency with higher and surface flatness, made of it soft Property screen there is good translucidus and comfort, while being influenced in the use as screen host material by temperature fluctuation Smaller, flexibility is good, can reach higher crimpness and is not easy the torsional deformation under physical action.Selected bagasse bleached pulp and Two kinds of raw material resources of chitosan are more rich and easy to get, and have good biological degradability, are conducive to environmental protection and waste Processing.
Specific embodiment
Below with reference to embodiment, the invention will be further described.
Embodiment 1
A method of preparing flexible screen host material:
It selects the bagasse bleached pulp and chitosan that whiteness is 90%ISO as raw material, bagasse is floated using chemical method first White slurry, which is modified, is prepared into solid content as 2% dialdehyde nano-cellulose suspension, while chitosan is prepared into nanoscale Chitosan.Dialdehyde nano-cellulose and nanoscale chitosan are uniformly mixed according to weight ratio for 5:0.7, and chitosan is then added The sodium peroxydisulfate of weight 0.1% is crosslinked dialdehyde nano-cellulose and nanoscale chitosan as initiator, while right The form of its chemical bonds is modified, and obtains modified nanometer cellulose.Finally by the nano-cellulose of this modification and third Olefin(e) acid resin compounded film forming, obtains a kind of host material for being used to prepare flexible screen.The material have good translucidus and Biological degradability, electric conductivity is high, and with a thickness of 0.1mm, thermal expansion coefficient is up to 3 × 10-6/℃。
Embodiment 2
A method of preparing flexible screen host material:
It selects the bagasse bleached pulp and chitosan that whiteness is 91%ISO as raw material, bagasse is floated using chemical method first White slurry, which is modified, is prepared into solid content as 2.5% dialdehyde nano-cellulose suspension, while chitosan is prepared into nanometer Grade chitosan.Dialdehyde nano-cellulose and nanoscale chitosan are uniformly mixed according to weight ratio for 5:0.85, and shell is then added The sodium peroxydisulfate of glycan weight 1.2% is crosslinked dialdehyde nano-cellulose and nanoscale chitosan, together as initiator When the form of its chemical bonds is modified, obtain modified nanometer cellulose.Finally by the nano-cellulose of this modification With acrylic resin composite membrane-forming, a kind of host material for being used to prepare flexible screen is obtained.The material has good light saturating Property and biological degradability, electric conductivity it is high, with a thickness of 0.3mm, thermal expansion coefficient is up to 6 × 10-6/℃。
Embodiment 3
A method of preparing flexible screen host material:
It selects the bagasse bleached pulp and chitosan that whiteness is 92%ISO as raw material, bagasse is floated using chemical method first White slurry, which is modified, is prepared into solid content as 3% dialdehyde nano-cellulose suspension, while chitosan is prepared into nanoscale Chitosan.Dialdehyde nano-cellulose and nanoscale chitosan are uniformly mixed according to weight ratio for 5:1, and chitosan weight is then added The sodium peroxydisulfate of amount 3% is crosslinked dialdehyde nano-cellulose and nanoscale chitosan as initiator, while changing to it It learns the form that bond is closed to be modified, obtains modified nanometer cellulose.Finally by the nano-cellulose and acrylic acid of this modification Resin compounded film forming, obtains a kind of host material for being used to prepare flexible screen.The material has good translucidus and biology Degradability, electric conductivity is high, and with a thickness of 0.5mm, thermal expansion coefficient is up to 10 × 10-6/℃。

Claims (2)

1. a kind of method for preparing flexible screen host material, it is characterised in that: select bagasse bleached pulp and chitosan as former Material is carried out acetylation and silylating reagent to bagasse bleached pulp first, is handled using high pressure ultrasound homogenizer it, is prepared Chitosan is prepared into nano-scale chitosan at dialdehyde nano-cellulose suspension, while using high pressure ultrasound homogenizer；It is used Sodium sulphate is crosslinked dialdehyde nano-cellulose and nanoscale chitosan, obtains modified nanometer cellulose as initiator, Finally by the nano-cellulose of this modification and acrylic resin composite membrane-forming, a kind of matrix for being used to prepare flexible screen is obtained Material；The whiteness of the bagasse pulp is 90~92%ISO；The initiator sodium peroxydisulfate additional amount is nano-scale chitosan matter The 0.1%~3% of amount；It is 2%~3% that the dialdehyde nano-cellulose, which suspends and starches solid content,；The dialdehyde nano-cellulose It is 3:0.7~1 with weight ratio of the nanoscale chitosan in crosslinking.
2. a kind of method for preparing flexible screen host material according to claim 1, it is characterised in that: the flexibility Screen host material has good translucidus and biological degradability, and electric conductivity is high, with a thickness of 0.1~0.5mm, thermal expansion coefficient Up to 3~10 × 10-6/℃。
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Publication number Priority date Publication date Assignee Title
CN108362199A (en) * 2017-01-26 2018-08-03 华邦电子股份有限公司 Straining and sensing device and its manufacturing method
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
CN107698784A (en) * 2017-10-23 2018-02-16 广西大学 A kind of preparation method of dialdehyde nano-cellulose and chitosan complex film

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104130431A (en) * 2014-07-06 2014-11-05 东北林业大学 Chitosan-furfural residue nano-fiber composite membrane preparation method
CN105199122A (en) * 2015-11-05 2015-12-30 广西大学 Preparation method of hemicellulose and gelatin composite biofilm
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

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104130431A (en) * 2014-07-06 2014-11-05 东北林业大学 Chitosan-furfural residue nano-fiber composite membrane preparation method
CN105199122A (en) * 2015-11-05 2015-12-30 广西大学 Preparation method of hemicellulose and gelatin composite biofilm
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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