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A kind of sodium alginate-cellulose nanocrystal-calcium carbonate ternary nanocomposite material and preparation method thereof

A technology of nanocomposite materials and sodium alginate, which is applied in the field of nanocomposite materials, nanomaterial assembly, and material chemistry, and can solve problems such as insufficient precision of the helical structure, limited material selection, time-consuming and labor-intensive problems, etc.

Active Publication Date: 2022-07-15
UNIV OF SCI & TECH OF CHINA
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Problems solved by technology

[0003] Teacher Yong Chen from the University of Southern California in the United States developed the technology of orderly arrangement of conductive carbon nanotube fibers induced by electric field, realized the construction of carbon nanotube fiber helical structure, and prepared carbon nanotube-epoxy resin composite materials. However, this Technology requires complex parameter regulation, time-consuming and labor-intensive, and requires raw materials to be electrically conductive, so material selection is limited (Advanced Materials 2017,29(11):1605750)
Teacher Bo Hao from Zhejiang University developed the electrospinning technology and prepared the ordered helical structure of nylon nanofibers. However, this method needs to carefully control the electrode position and output voltage of the electrospinning equipment. The preparation process is complicated and the efficiency is relatively low. In addition, the helical structure The accuracy is not high enough (ACS AppliedMaterials&Interfaces 2019,11(26):23616-23622)

Method used

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  • A kind of sodium alginate-cellulose nanocrystal-calcium carbonate ternary nanocomposite material and preparation method thereof
  • A kind of sodium alginate-cellulose nanocrystal-calcium carbonate ternary nanocomposite material and preparation method thereof
  • A kind of sodium alginate-cellulose nanocrystal-calcium carbonate ternary nanocomposite material and preparation method thereof

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preparation example Construction

[0035] In view of the preparation status of nano-helix structure composite materials, the present application provides a preparation method of sodium alginate-cellulose nanocrystal-calcium carbonate ternary nano-composite material, which can prepare environmentally friendly high-performance helical structure nano-composite materials Materials, specifically, the embodiment of the present invention discloses a preparation method of a sodium alginate-cellulose nanocrystal-calcium carbonate ternary nanocomposite material, comprising the following steps:

[0036] A) Mix the cellulose nanocrystal solution, sodium alginate solution and water, evaporate and dry to obtain the initial film;

[0037] B) placing the initial film in a solution containing calcium ions, and reacting to obtain a cross-linked film;

[0038] C) reacting the cross-linked film with a carbonate-containing compound to obtain a film, and pressing the film to obtain a sodium alginate-cellulose nanocrystal-calcium car...

Embodiment 1

[0056] Add 60 mL of deionized water to 50 mL of 5.6 wt% cellulose nanocrystal solution with a diameter of 5 to 15 nm and a length of 100 to 200 nm, and magnetically stir for 1 h until the binary mixing system is uniform; dissolve 1.2 g of sodium alginate powder in 70 mL of In deionized water, mechanically stir for 5 hours until the system is homogeneous to form sodium alginate aqueous solution; add the prepared sodium alginate aqueous solution to the above mixed system that has been stirred evenly, stir magnetically for 3 hours until the ternary mixing system is uniform, and let stand for 3 hours to remove air bubbles ; Pour the same volume of the mixed system into 8 plastic containers, evaporate and dry at 25°C and 50% humidity for 7 days, and a translucent film can be formed in the container;

[0057] The film was put into a 0.05M calcium chloride aqueous solution (100mL) for calcium ion crosslinking; the film was taken out to rinse the surface with ethanol, then put into a p...

Embodiment 2

[0060] Add 50 mL of deionized water to 60 mL of 5.6 wt% cellulose nanocrystal solution with a diameter of 5 to 15 nm and a length of 100 to 200 nm, and magnetically stir for 1 h until the binary mixing system is uniform; dissolve 2.5 g of sodium alginate powder in 70 mL of In deionized water, mechanically stir for 5 hours until the system is homogeneous to form sodium alginate aqueous solution; add the prepared sodium alginate aqueous solution to the above mixed system that has been stirred evenly, stir magnetically for 3 hours until the ternary mixing system is uniform, and let stand for 3 hours to remove air bubbles ; Pour the same volume of the mixed system into 8 plastic containers, evaporate and dry at 25°C and 50% humidity for 7 days, and a translucent film can be formed in the container;

[0061] The film was put into a 0.15M calcium chloride aqueous solution (100mL) for calcium ion crosslinking; the film was taken out to rinse the surface with ethanol, and then put into...

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Abstract

The invention provides a preparation method of sodium alginate-cellulose nanocrystal-calcium carbonate ternary nanocomposite material, comprising the following steps: A) mixing binary raw materials, evaporating and drying to obtain an initial binary film; B) mixing the The initial binary film is placed in a solution containing calcium ions, and reacted to obtain a cross-linked film; C) the cross-linked film is reacted with a compound containing carbonate, and then the obtained film is pressurized to obtain sodium alginate-fiber Elemental nanocrystalline-calcium carbonate ternary nanocomposite. The present application also provides a sodium alginate-cellulose nanocrystal-calcium carbonate ternary nanocomposite material with a nanohelix structure. The sodium alginate-cellulose nanocrystal-calcium carbonate ternary composite material prepared in the present application has a nanofiber helical structure, and the material has a simple source of raw materials, is environmentally friendly, and has an efficient preparation process.

Description

technical field [0001] The invention relates to the technical fields of material chemistry, nano-composite materials and nano-material assembly, in particular to a sodium alginate-cellulose nano-crystal-calcium carbonate ternary nano-composite material and a preparation method thereof. Background technique [0002] The helical structure is composed of a number of unidirectional fiber sheets that are gradually stacked in a spiral. Helical structure is very important for the design of advanced materials (especially protective armor materials, impact-resistant materials, etc.). How to prepare materials with helical structure has attracted extensive attention of experts, scholars and engineers. [0003] Mr. Yong Chen from the University of Southern California developed a technology for the ordered arrangement of carbon nanotube fibers induced by electric field, realized the construction of the helical structure of carbon nanotube fibers, and prepared carbon nanotube-epoxy compos...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L1/02C08L5/04C08K3/26C08J5/18
CPCC08J5/18C08J2301/02C08J2405/04C08J2305/04C08J2401/02C08K2003/265
Inventor 俞书宏陈思铭李欣雨吴双张思超高怀岭
Owner UNIV OF SCI & TECH OF CHINA
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