Preparation method of nanocellulose and 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 complex preparation process of composite airgel, limitation of polymer types, and high cost of industrial production. Achieve the effect of simple and fast preparation process, low density and high porosity

Active Publication Date: 2016-11-16
桂林奇宏科技有限公司
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Problems solved by technology

On the one hand, the types of polymers are limited, on the other hand, the preparation

Method used

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  • Preparation method of nanocellulose and polymer composite aerogel
  • Preparation method of nanocellulose and 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 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 (see...

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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, in particular to a method for preparing nanocellulose / polymer composite airgel based on Pickering emulsion technology. Background technique [0002] Airgel is a highly porous material formed by removing the liquid solvent in the gel while maintaining the three-dimensional network structure of the gel. Among them, silica aerogel, resorcinol / formaldehyde and melamine / formaldehyde aerogel and carbon aerogel are typical representatives. As a new generation of airgel material, cellulose aerogel not only has the characteristics of low density of traditional aerogel, but also has its own excellent characteristics such as: high strength and ductility as well as renewable, degradable and biophase Capacitance, thus greatly broadening the potential application of airgel in sewage treatment, marine deoiling biomedicine and other fields. The earliest cellulose airgel was prepared by chem...

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Application Information

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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 桂林奇宏科技有限公司
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