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Rapidly degradable graphene composite waterproof paper and preparation method thereof

A graphene composite, waterproof paper technology, applied in paper, papermaking, packaging paper and other directions, can solve the problems of non-waterproof, environmental pollution, difficult to degrade, etc., and achieve the effect of good bonding force, broad application prospects, and excellent waterproof performance.

Active Publication Date: 2021-08-10
DONGHUA UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention is to provide a fast-degradable graphene composite waterproof paper and its preparation method to overcome the defects of traditional packaging materials in the prior art that are difficult to degrade, easily cause environmental pollution, and are not waterproof.

Method used

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  • Rapidly degradable graphene composite waterproof paper and preparation method thereof
  • Rapidly degradable graphene composite waterproof paper and preparation method thereof
  • Rapidly degradable graphene composite waterproof paper and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0037] (1) At room temperature, weigh 500 mg of graphite oxide prepared by the modified Hummers method, place it in a 500 mL beaker, and then add 200 mL of deionized water to prepare a 2.5 mg / mL dispersion. Then put the beaker into a water-bath ultrasonic pool for 2 hours, then transfer it to a cell pulverizer for 1 hour to obtain 200 mL of a uniformly dispersed graphene oxide dispersion, which is transferred to a solution tray for use;

[0038] (2) The fiber paper to be used (Kraft paper for Galley packaging, breaking strength 185.0MPa, durability 26.3min (taking 5% moisture content at the bottom as failure point)) is treated with 20kV electric field polarization, so that the paper surface is positively charged, Then spread it on the surface of the dispersion liquid in step (1) for 10 minutes, so that one side of the paper base is completely soaked, and dry it.

[0039] (3) heat-treat the paper obtained in step (2) at 200° C. for 20 minutes to obtain a rapidly degradable grap...

Embodiment 2

[0044] According to embodiment 1, heat treatment temperature is changed into 300 ℃, heat treatment time is changed into 10min, all the other are identical with embodiment 1, obtain the graphene composite waterproof paper of fast degradation, its breaking strength 197.5MPa, durability is 118.6h (with 5% moisture content at the bottom is the point of failure).

[0045] Figure 4 Compared figure 1 It can be seen that the hydrophobicity of the graphene composite waterproof paper is significantly improved after heat treatment, and its contact angle reaches 103.9°.

Embodiment 3

[0047] According to embodiment 1, heat treatment temperature is 300 DEG C, and heat treatment time is 20min, and all the other are identical with embodiment 1, obtain the graphene composite waterproof paper of rapid degradation, its breaking strength 189.7MPa, and durability is 138.7h (by moisture content at the bottom 5% is the point of failure).

[0048] Figure 5 Compared figure 1 It can be seen that the hydrophobicity of the graphene composite waterproof paper is significantly improved after heat treatment, and its contact angle reaches 142.7°.

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Abstract

The invention relates to graphene composite waterproof paper capable of being rapidly degraded and a preparation method of the graphene composite waterproof paper. The composite waterproof paper is of a composite structure of paper and reduced graphene oxide. The method comprises the following steps: carrying positive charges on the surface of paper by adopting electric field polarization, then paving the paper on the surface of graphene oxide dispersion liquid to completely impregnate one surface of the paper, and conducting drying and and thermal treatment. The composite waterproof paper has excellent waterproofness and durability. The method is simple and rapid, and the process is environment-friendly and pollution-free.

Description

technical field [0001] The invention belongs to the field of environment-friendly functional materials and preparation thereof, in particular to a rapidly degradable graphene composite waterproof paper and a preparation method thereof. Background technique [0002] Traditional waterproof packaging materials are refractory polymer materials. Although they have excellent mechanical properties and waterproof properties, which bring convenience to life, they have caused serious damage to our living environment due to problems such as refractory degradation and high recycling costs. burden. Although paper-based packaging materials are easy to degrade and have good mechanical properties, they are often not used for packaging water-rich items. Especially in recent years, after the nationwide implementation of dry and wet garbage classification, people need to sort and dump garbage such as kitchen and fruit peels, and the plastic garbage bags that hold this type of wet garbage belo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D21H27/10D21H19/12D21H21/16D21H23/32D21H23/30D21H25/06
CPCD21H27/10D21H19/12D21H21/16D21H23/32D21H23/30D21H25/06Y02W90/10
Inventor 王宏志郭洋宋岑侯成义李耀刚张青红
Owner DONGHUA UNIV
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