Anisotropic nano-cellulose/montmorillonite composite aerogel and preparation method thereof

A technology of nanocellulose and composite airgel, which is applied in the field of nanocellulose/montmorillonite composite airgel and its preparation, and can solve the problems of limited application range, low thermal stability and brittleness of nanocellulose aerogel Large and other problems, to achieve the effect of improving thermal stability, good mechanical properties, good shape memory function
CN105315482AInactive Publication Date: 2016-02-10NANJING FORESTRY UNIV
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
NANJING FORESTRY UNIV
Publication Date
2016-02-10
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention discloses anisotropic nano-cellulose / montmorillonite composite aerogel. The aerogel is prepared by mixing a nano-cellulose suspension with a montmorillonite suspension and performing freeze casting. The invention further discloses a preparation method of the aerogel. The method comprises the following steps: (1) respectively preparing nano-cellulose suspension and montmorillonite suspension; (2) mixing the montmorillonite suspension with the nano-cellulose suspension to form uniformly dispersed nano-cellulose / montmorillonite suspension; (3) performing freeze casting on the nano-cellulose / montmorillonite suspension to obtain the nano-cellulose / montmorillonite composite aerogel. The rigidity and heat tolerance of the nano-cellulose aerogel are improved by adding the montmorillonite, and the anisotropic honeycomb shaped aerogel is prepared by means of a directional freeze drying method; and the mechanical performance of the anisotropic nano-cellulose / montmorillonite composite aerogel is superior to that of anisotropic foam-shaped nano-cellulose / montmorillonite composite aerogel prepared by a conventional freeze drying method since the stress of the aerogel mainly depends on cell wall stretching of the material rather than bending deformation of the material.
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Description

technical field

[0001] The invention relates to anisotropic nano-cellulose / montmorillonite composite airgel and a preparation method thereof, belonging to the fields of bioengineering and new materials. Background technique

[0002] Airgel, also known as xerogel, refers to a bulk material in which most of the solvent in the gel is removed, so that the space network structure of the gel is filled with a gas medium. The raw materials for the preparation of traditional aerogels are mostly silicon materials and metal oxides. In recent years, the research on preparing aerogels using graphene and carbon nanotubes as structural units has been increasing. Due to the advantages of low density, high specific surface area and high porosity, aerogels have been widely used in the fields of catalysts, supercapacitors and adsorbents.

[0003] As a renewable resource with high strength, good toughness and large specific surface area, nanocellulose has attracted more and more attention. N...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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