Preparation method of transparent paper

A technology of transparent paper and wood powder, which is applied in the directions of papermaking, papermaking, textiles and papermaking, etc., can solve the problems of low production efficiency of transparent paper, complicated nanofiber steps, time-consuming, labor-intensive and energy-consuming, etc. The effect is not high and the process is easy to operate

Active Publication Date: 2017-07-04
NANJING UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In these methods, the steps of separation, extraction, and concentration of nanofibers are complicated, time-consuming, laborious and energy-consuming, resulting in low production efficiency of nanofiber transparent paper, high product prices, environmental pollution, and high selectivity to raw materials.

Method used

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  • Preparation method of transparent paper
  • Preparation method of transparent paper
  • Preparation method of transparent paper

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] The basswood that removes bark is obtained basswood sawdust with sawdust grinder, it is mixed with the sodium hypochlorite solution that concentration is 15%, sawdust and sodium hypochlorite mass ratio are 1:10, at temperature is 50 degrees Celsius, react 10 minutes, react After the end, wash with water three times to remove residual sodium hypochlorite, take 5ml of slurry, and filter it with a suction filter to remove a large amount of water, then place the product in a press, and hold the pressure for 0.1 hour at a pressure of 0.1MPa. The obtained transparent paper material has a diameter of 40 mm, a thickness of 40 μm, and a transparency of 80%.

Embodiment 2

[0030] The basswood that removes bark is obtained basswood sawdust with sawdust grinder, and it is mixed with the sodium hypochlorite solution that concentration is 1%, and the mass ratio of sawdust and sodium hypochlorite is 1:10, and at temperature is 10 degrees Celsius, reacts 48 hours, reacts After finishing, wash with water three times, remove residual sodium hypochlorite, get 5ml slurry, and suction filtration with suction filtration device, remove a large amount of water, then product is placed in press, under pressure is 25MPa, keep pressure 2 hours, obtain The diameter of the transparent paper material is 40mm, the thickness is 40μm, and the transparency is 85%.

Embodiment 3

[0032] The basswood that will remove bark is obtained basswood wood powder with wood powder machine, and it is mixed with the sodium hypochlorite solution that concentration is 15%, and sawdust and sodium hypochlorite mass ratio are 1:10, and at temperature is 45 degrees Celsius, reacts 10 minutes, After the reaction finishes, wash with water three times to remove residual sodium hypochlorite, get 5ml of slurry, and filter with a suction filter to remove a large amount of water, then place the product in a press, and hold the pressure for 0.5 hour at a pressure of 2MPa. The obtained transparent paper material has a diameter of 40 mm, a thickness of 40 μm, and a transparency of 77%.

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Abstract

The invention discloses a preparation method of transparent paper and belongs to the fields of nano/micro micro-structure materials and preparation technology thereof. The transparent paper is a fiber material, which is composed of nano/micro wood fiber materials and is higher than 70% in transparence degree. The preparation method includes the following steps: 1) processing a wood material into wood chips or wood powder; mixing the wood chips or wood powder with a sodium hypochlorite solution at certain temperature to perform a reaction for a certain time to remove the lignin in the wood material; 2) washing the reaction product with water for several times to remove residual sodium hypochlorite, and removing most of water from the cleaned pulp material; 3) placing the pulp material in a pressing machine, performing pressure maintenance under certain pressure for a period to remove the rest of water to obtain the transparent paper. The method is suitable for various types of wood materials, is low in cost, is abundant in source of materials, is easy to carry out, is environment-friendly and high-yield, is free of complex equipment and devices, and allows large-scale quick production.

Description

technical field [0001] The invention relates to a preparation method of transparent paper, which belongs to nano / micro microstructure materials and preparation technology thereof. Background technique [0002] Transparent paper preparation is a technology with important application background. Transparent paper is widely used in flexible electronic devices due to its excellent optical properties, mechanical properties, thermal stability, surface properties, environmental friendliness, and rapid natural degradation. Nowadays, transparent paper has been successfully applied in displays, transistors, flexible organic light-emitting diodes, lithium batteries, solar cells, supercapacitors, etc., making it expected to become a new environmentally friendly substrate material for electronic devices, which has very important scientific research value and application prospects. For example, transparent paper has high transparency and adjustable haze, which can be controlled by adjus...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D21C5/00D21F13/10
CPCD21C5/00D21F13/10
Inventor 祝名伟黄大方吴佳扬张燕陈延峰
Owner NANJING UNIV
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