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A kind of reactive superhydrophobic paper and its preparation method and application

A reactive, super-hydrophobic paper technology, applied in packaging paper, wrapping paper, transportation and packaging, etc., can solve the problems of high price, difficult to achieve large-scale production, harsh process conditions, etc., and achieve acid-base stability and thermal stability. The effect of excellent stability, good superhydrophobicity and simple preparation method

Active Publication Date: 2021-07-20
GUANGXI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In these preparation processes, it is usually necessary to use expensive fluorine-containing or silane compounds to make the surface have low surface energy, and many methods involve multi-step reactions, complicated equipment and even harsh process conditions, making it difficult to achieve large-scale production
At the same time, the functional groups with low surface energy used in these methods are chemically inert, difficult to functionalize or require long-term processing in harsh environments, thus limiting their application fields.

Method used

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  • A kind of reactive superhydrophobic paper and its preparation method and application

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Experimental program
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Effect test

Embodiment 1

[0027] Embodiment 1: the preparation of the reactive superhydrophobic paper of the present invention

[0028] The basis weight of paper is 120g / m 2 filter paper

[0029] S1. Disperse the nanocellulose obtained after homogenizing α-cellulose in N,N-dimethylformamide, add triethylamine (3eq), and then add 10-undecylenoyl chloride (1eq), React at 100°C for 3h;

[0030] S2. The acylated nanocellulose containing carbon-carbon double bond active groups prepared in step S1 is washed and purified with ethanol, and finally dispersed in acetone solvent to obtain a carbon-carbon double bond active group with a mass concentration of 1.04wt%. The acylated nanocellulose dispersion of the group;

[0031] S3. 20mL (1.04wt%) containing the acylated nanocellulose dispersion of carbon-carbon double bond active group is sprayed onto the paper base surface (3 * 3cm 2 ), after drying, a reactive superhydrophobic paper is obtained, and the loading capacity of the acylated nanocellulose containin...

Embodiment 2

[0037] Embodiment 2: the preparation of the reactive superhydrophobic paper of the present invention

[0038] The basis weight of the paper base is 80g / m 2 printing paper

[0039] S1. Disperse the nanocellulose obtained after bleaching, grinding and homogenizing the bleached pulp in N,N-dimethylformamide, add pyridine (6eq), and then add 10-undecylenoyl chloride (2eq), React at 80°C for 2h;

[0040] S2. The acylated nanocellulose containing carbon-carbon double bond active groups prepared in step S1 is washed and purified with ethanol, and finally dispersed in acetone solvent to obtain a carbon-carbon double bond active group with a mass concentration of 1.04wt%. The acylated nanocellulose dispersion of the group;

[0041] S3. 10mL (1.04wt%) containing the acylated nanocellulose dispersion of carbon-carbon double bond active group is sprayed onto the paper base surface (3 * 3cm 2 ), after drying, a reactive superhydrophobic paper is obtained, and the loading capacity of th...

Embodiment 3

[0047] Embodiment 3: the preparation of the reactive superhydrophobic paper of the present invention

[0048] The basis weight of the paper base is 80g / m 2 kraft paper

[0049] S1. Disperse cellulose nanocrystals in N,N-dimethylformamide, add triethylamine (12eq), then add 10-undecylenoyl chloride (4eq), and react at 60°C for 1h;

[0050] S2. Washing and purifying the cellulose acylate containing carbon-carbon double bond active groups prepared in step S1 with ethanol, and finally dispersing them in an ethanol solvent to obtain carbon-carbon double bond active groups with a mass concentration of 2.08wt% Acylated nanocellulose dispersion of agglomerate;

[0051] S3. 10mL (2.08wt%) of the cellulose acylate dispersion containing carbon-carbon double bond active groups is sprayed onto the paper base surface (3 × 3cm 2 ), after drying, a reactive superhydrophobic paper is obtained, and the loading capacity of the acylated nanocellulose containing carbon-carbon double bond active...

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Abstract

The invention discloses a reactive super-hydrophobic paper and its preparation method and application, belonging to the technical field of super-hydrophobic materials and post-processing of paper. The invention prepares super-hydrophobic paper by acylating the nano-cellulose, and then soaking or spraying the dispersion liquid on the surface of the paper base. The superhydrophobic paper prepared by the invention has excellent superhydrophobicity, time stability, acid-base stability and thermal stability, and at the same time, the carbon-carbon double bond active groups existing on the surface can undergo further reaction. Compared with the traditional super-hydrophobic paper, the present invention uses cheap, green and renewable cellulose as the raw material of the super-hydrophobic coating, and the preparation method is simple, and the reactivity on the surface can further expand its application field.

Description

technical field [0001] The invention relates to the technical field of superhydrophobic materials and post-processing of paper, in particular to a reactive superhydrophobic paper and its preparation method and application. Background technique [0002] Superhydrophobic is a wetting state of a solid surface, specifically refers to the static contact angle of water droplets greater than 150°, and the rolling angle is less than 10°. The superhydrophobic phenomenon originated in nature. Many plants and animals have excellent superhydrophobic properties, such as lotus leaves, rose petals, taro leaves, cicada wings, butterfly wings, etc. By studying the surface characteristics of these organisms, scientists have come up with two important factors for constructing superhydrophobic surfaces: micro / nano-sized rough structures and low surface energy. Therefore, in order to obtain an ideal superhydrophobic surface, it can be achieved by modifying the rough surface with low surface ene...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D21H19/34D21H27/10C08B3/10
CPCC08B3/10D21H19/34D21H27/10
Inventor 李薇张松王巍覃程荣王双飞
Owner GUANGXI UNIV