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Preparation method of super-hydrophobic oleophobic transparent nanocellulose paper

A nano-cellulose, super-hydrophobic and oleophobic technology, applied in the direction of synthetic cellulose fiber, non-fibrous pulp addition, fiber raw material treatment, etc., can solve the problems of opacity and poor hydrophobicity of nano-paper

Active Publication Date: 2016-07-13
SHANDONG AGRICULTURAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] The purpose of the present invention is to provide a method for preparing superhydrophobic and oleophobic transparent nanocellulose paper in order to solve the technical problems of opaque and poor hydrophobicity of the nano-paper prepared by the existing method

Method used

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  • Preparation method of super-hydrophobic oleophobic transparent nanocellulose paper

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specific Embodiment approach 1

[0037] Specific embodiment one: the preparation method of superhydrophobic and oleophobic transparent nanocellulose paper of this embodiment is carried out according to the following steps:

[0038] 1. Preparation of nanocellulose aqueous solution:

[0039] Add purified cellulose into a 250ml beaker, add deionized water to a mass concentration of 0.1%-0.3%, add 2g of cellulase, pretreat at 50°C for 2h, then treat at 90°C for 2h, then vacuum filter After washing with water, reconstitute the water solution with a mass concentration of 0.1%-0.3%, and then undergo a 600bar high-pressure homogenization mechanical treatment for 30 minutes to obtain the nanocellulose water solution;

[0040] Or put purified cellulose into a 250ml beaker, add deionized water to a mass concentration of 0.1%-0.3%, add 0.1g sodium bromide, 0.016g TEMPO reagent in turn, and add 5ml of 12% TEMPO reagent under magnetic stirring Sodium hypochlorite solution, add the sodium hydroxide that concentration is 0....

specific Embodiment approach 2

[0045] Embodiment 2: This embodiment differs from Embodiment 1 in that the organoalkoxysilane described in step 2 is ethyl orthosilicate. Others are the same as in the first embodiment.

specific Embodiment approach 3

[0046] Specific embodiment three: the difference between this embodiment and specific embodiment one or two is that in step two, 6% organoalkoxysilane, 20% deionized water and 74% absolute ethanol are mixed by mass percentage . Others are the same as those in the first or second embodiment.

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Abstract

The invention relates to a preparation method of super-hydrophobic oleophobic transparent nanocellulose paper, which relates to a preparation method of super-hydrophobic oleophobic and transparent nanocellulose paper, and solves the technical problems that the hydrophobic nano paper prepared by the traditional method is not transparent and poor in hydrophobility and oleophobility. The preparation method comprises the steps: I, preparing a nanocellulose solution; II, preparing a hydrophobic substance; III, suction filtering the nanocellulose solution, and forming a film; and IV, preparing the super-hydrophobic oleophobic transparent nanocellulose paper. A hydrophobic contact angle of the hydrophobic oleophobic transparent nanocellulose paper can reach 150 degrees or more, a rolling angle is smaller than 10 degrees, and an oleophobic contact angle can reach 120 degrees or more; the visible light transmittance reaches 80 percent; and the tensile stress can reach 100MPa or more, and a maximum pyrolysis temperature can reach 350 DEG C or higher. The preparation method belongs to the field of the preparation of the nanocellulose paper.

Description

technical field [0001] The invention relates to a preparation method of superhydrophobic and oleophobic transparent nano-cellulose paper. Background technique [0002] Nanocellulose has the advantages of wide source of raw materials, high strength, large specific surface area, good biocompatibility, biodegradability, renewable recycling, etc. Micron-scale, small diameter, large aspect ratio, so that it shows high mechanical properties, Young's modulus and tensile strength are 13GPa and 223MPa respectively; in addition, it also has a low thermal expansion coefficient (CTE<8.5ppmK -1 ). These remarkable properties make it possible to make transparent nanocellulose film paper for high-end fields such as packaging, high-temperature-resistant flexible electronic component substrates, and microfluidic chips. [0003] However, the surface of nanocellulose contains a large number of functional groups - hydroxyl groups, which are very easy to absorb water, resulting in high wate...

Claims

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Application Information

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IPC IPC(8): D21H13/04D21H17/13D21H17/34
CPCD21H13/04D21H17/13D21H17/34
Inventor 李永峰董晓英
Owner SHANDONG AGRICULTURAL UNIVERSITY
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