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Transparent paper and method for preparing same by repeatedly coating surface

A surface coating, transparent paper technology, applied in paper coatings, special paper, paper and other directions, can solve the problems of high cost, application limitation, cellulose crystal structure damage, etc., and achieve short production cycle, low cost and simple process. Effect

Active Publication Date: 2016-05-11
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Nanopaper is prepared from nanocellulose, but the preparation process of nanocellulose is time-consuming and costly, making it impossible to achieve large-scale production
Regenerated cellulose film is a transparent film made by completely dissolving and regenerating cellulose with a cellulose solvent. However, the crystal structure of cellulose is completely destroyed, and the mechanical strength of regenerated cellulose film is low, so its application is limited.

Method used

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  • Transparent paper and method for preparing same by repeatedly coating surface
  • Transparent paper and method for preparing same by repeatedly coating surface
  • Transparent paper and method for preparing same by repeatedly coating surface

Examples

Experimental program
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Effect test

Embodiment 1

[0032] The method for rapidly preparing transparent paper by multiple coating methods comprises the following steps and process conditions:

[0033] (1) Papermaking of base paper: using broad-leaved wood dissolving pulp board as raw material, beating first, the beating degree is 40SR°, and then the pulp after beating is copied into base paper, quantitatively 60g / m 2 ;

[0034] (2) raw material drying: drying the base paper made in step (1) until the moisture content is lower than 2%;

[0035] (3) Coating process: the ionic liquid N-ethylimidazolium hydrogen phosphite (EMIMMeOPO 2 H) coating on the base paper surface dried in step (2). The loading amount of ionic liquid on the surface of base paper is 5g / m 2 ;

[0036] (4) Partial dissolution of the base paper surface: put the base paper coated in step (3) on a continuous flat press with a temperature of 100°C and a pressure of 1 MPa for 10 minutes to fully swell and partially dissolve the plant fibers on the base paper sur...

Embodiment 2

[0044] The method for rapidly preparing transparent paper by multiple coating methods comprises the following steps and process conditions:

[0045] (1) Papermaking of base paper: using broad-leaved wood dissolving pulp board as raw material, beating first, the beating degree is 50SR°, and then the pulp after beating is copied into base paper, quantitatively 50g / m 2 ;

[0046] (2) raw material drying: drying the base paper made in step (1) until the moisture content is lower than 2%;

[0047](3) Coating process: prepare N-N dimethylacetamide / lithium chloride (DMAC / LiCl) solution with a ratio of 10:1, and apply the prepared solution on the surface of step (2) by spin coating Dry base paper surface. The loading amount of DMAC / LiCl solution on the base paper surface is 20g / m 2 ;

[0048] (4) Partial dissolution of the base paper surface: put the base paper coated in step (3) on an intermittent flat press with a temperature of 70°C and a pressure of 5 MPa for 30 minutes to ful...

Embodiment 3

[0054] The method for rapidly preparing transparent paper by multiple coating methods comprises the following steps and process conditions:

[0055] (1) Papermaking of base paper: using broad-leaved wood dissolving pulp board as raw material, beating first, the beating degree is 60SR°, and then the pulp after beating is copied into base paper, quantitatively 40g / m 2 ;

[0056] (2) raw material drying: drying the base paper made in step (1) until the moisture content is lower than 2%;

[0057] (3) Coating process: the ionic liquid 1-allyl-3-hexylimidazolium chloride (AHIMCl) is coated on the surface of the base paper dried in step (2) by curtain coating. The loading amount of ionic liquid on the surface of base paper is 10g / m 2 ;

[0058] (4) Partial dissolution of the base paper surface: put the base paper coated in step (3) on a continuous flat press with a temperature of 100°C and a pressure of 2 MPa for 5 minutes to fully swell and partially dissolve the plant fibers on ...

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Abstract

The invention discloses transparent paper and a method for preparing the same by repeatedly coating a surface. The method includes: drying original paper made with pulp until water content is lower than 2%; coating a cellulose solvent on the original paper at constant temperature, hot-pressing at temperature of 80-120 DEG C and at pressure of 1-10 MPa, soaking and washing, and hot-pressing for drying; taking a sample out, circularly treating the sample for 1-3 times according to the above process to obtain the transparent paper extremely low in porosity and compact in structure. When gram weight is 30-60 g / m2, thickness of the transparent paper is 30-100 um, light transmittance is 60-90%, stretch strength is 20-50 MPa, and stretch rate is 10-30%. Paper pulp is adopted as a raw material, so that process environment is friendly, cost is low, production period is short, and only 30-120 min is needed for the whole process; industrialized production can be realized only by partly modifying existing papermaking machine process equipment.

Description

technical field [0001] The invention relates to a novel method for quickly preparing transparent paper, and the material can be applied to the fields of flexible electronic devices such as organic light-emitting diodes, display devices, transistors, solar cells, and supercapacitors. Background technique [0002] As an emerging high-performance transparent substrate, transparent paper has the advantages of low-carbon environmental protection, curlability, high processing temperature, and good printability. In recent years, it has been widely used in flexible organic light-emitting diodes, display devices, transistors, solar cells, The field of flexible electronic devices such as supercapacitors has obtained very gratifying successful application experience, which has attracted strong attention from all over the world. At present, transparent paper mainly includes nano paper and regenerated cellulose film. Nanopaper is prepared from nanocellulose, but the preparation process ...

Claims

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Application Information

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IPC IPC(8): D21H27/00D21H19/14D21H25/00
CPCD21H19/14D21H25/00D21H27/00
Inventor 刘德桃陈进波程凡路朋博陈克复
Owner SOUTH CHINA UNIV OF TECH
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