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Paper protection method for sealing, protecting and reinforcing through high voltage electrostatic spinning film coating

A high-voltage electrospinning and paper technology, which is applied in the post-processing of waste paper, can solve the problems of no paper material application reports, inability to promote large-scale use, and accelerate paper aging, so as to achieve easy-to-obtain reinforcement materials and adjustable pore size Control and equipment are simple

Inactive Publication Date: 2013-08-28
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the reinforcement of the screen will cover the text to a certain extent, and the screen itself is easy to age, which will cause damage to the paper; the hot-pressing film is to reinforce a prepared plastic film on the surface of the paper. The texture and appearance have changed greatly; the vacuum coating method is to inject organic matter into the container where the paper is placed under vacuum conditions, so that the organic matter penetrates into the paper to form a protective film to strengthen and protect. However, due to the limitation of equipment costs, This method cannot be popularized and used on a large scale; resin reinforcement is to apply a certain concentration of resin solution on the surface of the paper to reinforce the paper. Due to the poor wettability of the resin, it cannot penetrate into the inside of the paper fiber well, and the solution is in the paper. The surface and interior of cultural relics cause a concentration gradient, which will accelerate the aging of paper
However, there is no application report related to the protection of paper materials

Method used

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  • Paper protection method for sealing, protecting and reinforcing through high voltage electrostatic spinning film coating
  • Paper protection method for sealing, protecting and reinforcing through high voltage electrostatic spinning film coating

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Take the newspaper from the 1970s for spinning and sealing, add 12g PVDF to 100ml DMF and mix it evenly as the spinning solution. The flow rate is 0.7 ml / h, the voltage is 15kV, and the spinning film thickness is 300. . Observe the onlooker morphology of the newspaper after spinning reinforcement, such as figure 2 Shown. It can be seen that the polymer fibers are evenly distributed, and the pore radius on the surface of the mesh fiber membrane is about 1 about.

Embodiment 2

[0030] Take Anhui Red Star rice paper for spinning and sealing, add 20g PVP into 100ml ethanol and mix it evenly as the spinning solution. The flow rate is 0.5 ml / h, the voltage is 20kV, and the spinning film thickness is 50. . The tensile strength of the paper before treatment is 0.824 kN / m, and the tensile strength of the paper after treatment is 0.953 kN / m.

Embodiment 3

[0032] Take the newspaper from the 1970s for spinning and sealing, add 15g PVDF to 100ml DMF and mix it as the spinning solution, the flow rate is 1.0 ml / h, the voltage is 25kV, and the spinning film thickness is 100 . The water contact angle of the paper before the measurement was 42°, and the contact angle increased to 148° after the treatment.

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Abstract

The invention discloses a method for reinforcing, sealing and protecting weak paper through a spinning film coating technology. High polymer sol generates micro / nano fiber membranes at normal temperature and normal pressure under the action of high voltage static to cover the paper surface so as to improve the tensile strength and elongation of the paper and effectively avoid secondary pollution of the paper generated by external pollutants such as dust mite, dust and mould. The method can be realized at normal temperature and normal pressure, thereby being simple and practicable, the spinning speed is high, the treatment process is free of pollution, and no obvious change occurs on the reinforced paper or the writing and pigments on the paper surface.

Description

Technical field [0001] The invention relates to a method for reinforcing and sealing fragile paper, especially ancient book paper, using high-voltage electrostatic field spinning and film coating technology. Background technique [0002] As a natural organic material, paper is prone to acidification, aging, and chipping under the influence of environmental factors. This is mainly due to irreversible chemical changes in the chemical composition of the paper, which greatly reduces the performance of the paper, namely: paper The process of chemical changes in the cellulose, hemicellulose and lignin in the substance under the factors of acid, light, moisture, temperature, mold and harmful substances in the air. At present, there are technologies in China to deacidify and repair fragile aging paper on a large scale. However, if the paper after deacidification is not well reinforced and sealed, it is easy to be affected by external pollutants such as mites, dust and mold. Under second...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D21H25/18
Inventor 张溪文李青莲奚三彩
Owner ZHEJIANG UNIV
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