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A kind of preparation method of nanocellulose/polymer composite aerogel

A technology of nanocellulose and composite airgel, which is applied in the field of preparation of nanocellulose/polymer composite airgel, can solve the problems of polymer type limitation, complex preparation process of composite airgel, and high cost of industrial production. Achieve the effect of simple and fast preparation process, low density and high porosity

Active Publication Date: 2019-02-05
GUILIN QIHONG TECH CO LTD
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Problems solved by technology

On the one hand, the types of polymers are limited, on the other hand, the preparation process of composite airgel is complicated, and the industrial production cost is high

Method used

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  • A kind of preparation method of nanocellulose/polymer composite aerogel
  • A kind of preparation method of nanocellulose/polymer composite aerogel

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Embodiment Construction

[0017] The present invention will be further described below in conjunction with specific examples, but the present invention is not limited to the following examples, and the chemical reagents and raw materials used in the following examples are all analytically pure.

[0018] Example:

[0019] (1) 0.8 milliliters of mass concentration is the water dispersion liquid of the sisal cellulose nanofiber of 0.4% and 0.2 milliliters of mass concentration is the dichloromethane solution of the polylactic acid of 1% to mix and make mixed solution, then mixed solution is in power Sonicate in a 400W ultrasonic emulsifier for 5 minutes to prepare a Pickering emulsion gel containing polylactic acid in the stable oil phase of the gelled sisal cellulose nanofibers.

[0020] (2) Freeze the Pickering emulsion prepared in step (1) at -20°C for 24 hours, and then freeze it in a freeze dryer at -60°C with a vacuum of 10 Pa for 24 hours to obtain nanocellulose / Polylactic acid composite airgel ...

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Abstract

The invention discloses a preparation method of nanocellulose and polymer composite aerogel. The preparation comprises the steps that a Pickerin emulsion containing a polymer in an oil phase of which the nanocellulose is stable is subjected to gelation firstly, freeze drying is conducted, and the nanocellulose and polymer composite aerogel which is high in porosity and low in density is obtained. The preparation method is suitable for nanocellulose which is extracted and prepared from various raw materials and has different morphology and various water insoluble polymers, and large-scale popularization is easy to achieve. For most composite aerogel materials formed by water-soluble polymers and cellulose at present, composite aerogel materials formed by the water insoluble polymers and cellulose are obtained. Meanwhile, reagents used in the preparation method are common reagents, the price is low, the preparation process is simple, convenient and rapid, and the obtained nanocellulose and polymer composite aerogel has the advantages of being high in porosity, low in density and low in heat conductivity coefficient, having water absorption oil absorption performance and the like.

Description

Technical field [0001] The invention belongs to the technical field of airgel material preparation, and particularly relates to a preparation method of nanocellulose / polymer composite aerogel based on Pickering emulsion technology. Background technique [0002] Aerogel is a highly porous material formed by removing the liquid solvent while keeping the three-dimensional network structure of the gel unchanged. Among them, silicone aerogels, resorcin / formaldehyde and melamine / formaldehyde aerogels and carbon aerogels are typical representatives. As a new generation of aerogel material, cellulose aerogel not only has the low density and other characteristics of traditional aerogels, but also has its own excellent characteristics such as: higher strength and ductility, as well as renewable, degradable and biodegradable. Capacitive, thus greatly broadening the potential applications of aerogels in sewage treatment, marine oil removal, biomedicine and other fields. The earliest c...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08J9/28C08J3/075C08L1/02C08L67/04
CPCC08J3/075C08J9/28C08J2201/0484C08J2205/026C08J2301/02C08J2467/04C08L1/02C08L2205/16C08L67/04
Inventor 刘红霞周昌兵徐阳
Owner GUILIN QIHONG TECH CO LTD
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