Composite-morphology nano cellulose transparent film based on waste paper and preparation method of composite-morphology nano cellulose transparent film

A technology of nano-cellulose and transparent film, applied in pulp beating method, secondary cellulose fiber, fiber raw material treatment, etc., can solve the problems of single recycling method, low added value of products, waste of resources, etc., and achieve good thermal stability Performance and oxygen barrier performance, creating economic and environmental benefits, and low production cost

Pending Publication Date: 2022-04-15
XIAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] The world produces more than 400 million tons of waste paper every year. The amount of waste paper is large but the recovery rate is low. A considerable part of waste paper is still processed through landfill or incineration, which brings huge pressure to the environment. Only about 50% to 65% of the waste paper is recovered. Waste paper is recycled, and the recycling method is single, most of which are used to produce recycled paper, and the added value of the product is low, which invisibly causes a waste of resources

Method used

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  • Composite-morphology nano cellulose transparent film based on waste paper and preparation method of composite-morphology nano cellulose transparent film
  • Composite-morphology nano cellulose transparent film based on waste paper and preparation method of composite-morphology nano cellulose transparent film
  • Composite-morphology nano cellulose transparent film based on waste paper and preparation method of composite-morphology nano cellulose transparent film

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Effect test

Embodiment 1

[0079] The preparation method of the composite shape nano-cellulose transparent film based on waste paper comprises the following steps:

[0080] Step 1, take the following components by weight: 1.59% waste inkless A4 paper, 32.27% deionized water, 0% deinking agent, 66.14% mass fraction of 98% concentrated sulfuric acid, the weight percentage of the above components sum to 100%;

[0081] Step 2, preparing waste paper fiber, the specific operation steps are as follows:

[0082] Step 2.1, crush the waste paper into pieces of 20mm×10mm, add deionized water to soak for 40min, and obtain the waste paper liquid;

[0083] Step 2.2, pour the waste paper liquid obtained in step 2.1 into a beater for beating for 40 minutes, pour it into a 325-purpose standard inspection sieve after beating, rinse with water several times, remove foam, and drain the water to obtain waste paper pulp;

[0084] Step 2.3, put the waste paper pulp in a petri dish, put it into an electric blast drying oven,...

Embodiment 2

[0098] A kind of preparation method based on the composite appearance nano-cellulose transparent film of waste paper, comprises the following steps:

[0099] Step 1, take the following components by weight: 1.63% waste A4 paper with ink, 32.66% deionized water, 0.38% deinking agent, 65.33% concentrated sulfuric acid with a mass fraction of 98%, the weight percentage of the above components The sum is 100%; wherein the mass ratio of each component in the deinking agent is: H 2 o 2 :NaOH:Na 2 SiO 3 : SDBS: OP-10 = 2.8:0.4:1.3:0.35:0.45.

[0100] Step 2, preparing waste paper fiber, the specific operation steps are as follows:

[0101]Step 2.1, crush waste paper into 18mm×8mm fragments, add deionized water and deinking agent to soak for 30min, and obtain waste paper liquid;

[0102] Step 2.2, pour the waste paper liquid obtained in step 2.1 into a beater for beating for 30 minutes, pour it into a 325-purpose standard inspection sieve after beating, rinse with water several t...

Embodiment 3

[0117] A kind of preparation method based on the composite appearance nano-cellulose transparent film of waste paper, comprises the following steps:

[0118] Step 1, take the following components by weight respectively: 1.79% waste A4 paper with ink, 35.41% deionized water, 0% deinking agent, 62.80% mass fraction is 98% concentrated sulfuric acid, the weight percentage of the above components sum to 100%;

[0119] Step 2, preparing waste paper fiber, the specific operation steps are as follows:

[0120] Step 2.1, crush the waste paper into 15mm×4mm pieces, add deionized water to soak for 20min, and obtain the waste paper liquid;

[0121] Step 2.2, pour the waste paper liquid obtained in step 2.1 into a beater for beating for 20 minutes, pour it into a 325-purpose standard inspection sieve after beating, rinse with water several times, remove foam, and drain the water to obtain waste paper pulp;

[0122] Step 2.3, put the waste paper pulp in a petri dish, put it into an elect...

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Abstract

The invention discloses a waste paper-based composite morphology nano cellulose transparent film, which is prepared from the following ingredients in percentage by weight: 1.59 to 1.97 percent of waste paper, 31.86 to 39.29 percent of deionized water, 0 to 0.38 percent of deinking agents and 58.52 to 66.14 percent of concentrated sulfuric acid with the mass fraction of 98 percent, and the sum of the weight percentages of the ingredients is 100 percent. The transparent film has high crystallinity, good thermal performance and oxygen barrier performance, and has wide application prospects in the fields of packaging and the like. The invention further discloses a preparation method of the waste paper-based composite-morphology nano-crystalline cellulose transparent film.

Description

technical field [0001] The invention belongs to the field of recycling of waste resources and extraction and preparation of nanomaterials, in particular to a waste paper-based composite nano-cellulose transparent film, and also relates to the preparation of the waste paper-based composite nano-cellulose transparent film Preparation. Background technique [0002] The world produces more than 400 million tons of waste paper every year. The amount of waste paper is large but the recovery rate is low. A considerable part of waste paper is still processed through landfill or incineration, which brings huge pressure to the environment. Only about 50% to 65% of the waste paper is recovered. Waste paper is recycled, and there is only one way to recycle it. Most of it is used to produce recycled paper, and the added value of the product is low, which invisibly causes a waste of resources. Therefore, it is of great practical significance and social benefit to seek a new way to achiev...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D21B1/32D21B1/08D21C1/04D21D1/02D21D5/02D21H11/14
CPCY02W30/64
Inventor 雷婉青裴慧方长青侯景宇
Owner XIAN UNIV OF TECH
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