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Lignin-based hydrogen bond organic framework nano material as well as preparation method and application thereof

An organic framework and nanomaterial technology, applied in the field of lignin-based hydrogen-bonded organic framework nanomaterials and its preparation, to achieve high biological safety, high application potential, and high carbon dioxide and oxygen selective permeability

Active Publication Date: 2022-03-08
NANKAI UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the existing food packaging materials cannot meet the above requirements

Method used

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  • Lignin-based hydrogen bond organic framework nano material as well as preparation method and application thereof
  • Lignin-based hydrogen bond organic framework nano material as well as preparation method and application thereof
  • Lignin-based hydrogen bond organic framework nano material as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0039] The specific steps of the preparation method of the lignin-based hydrogen-bonded organic framework nanomaterial provided by the present invention are as follows:

[0040] S11, dissolving commercially available lignin and potassium carbonate in an organic solvent, and obtaining mixture A after ultrasonication for 5 minutes;

[0041] S12. Dissolve tetrafluoroterephthalonitrile in a solvent, and obtain solution B after ultrasonication for 5 minutes; the solvent water or DMF

[0042] S13. Mix solution A and solution B, add ammonium persulfate, mediate and sonicate at room temperature for 60 minutes to obtain mixture C;

[0043] S14. Transfer the mixture C to an autoclave for 24 hours, rinse with water, DMSO, and ethanol three times at room temperature, and vacuum-dry at 70°C for 8 hours to obtain a brown-black solid, which is a lignin-based hydrogen-bonded organic framework nanomaterial .

[0044] Examples 1 to 11 are shown in Table 1.

[0045] Table 1

[0046]

[00...

Embodiment 1

[0051] In Examples 1-11, the ratio of solvents to the crystallization of hydrogen-bonded organic framework nanomaterials is mainly compared, mainly including volume ratios of ethanol and water: 3 / 7, 1 / 1, 7 / 3, ethyl acetate and water 3 / 7, Methanol and water are 3 / 7, and the test results show that when the volume of ethanol and water in Example 1 is 7 / 3, the hydrogen-bonded organic framework nanomaterial crystallizes well and has the highest yield; Crystallization situation, crystallization is best at 120 degrees Celsius, such as Figure 5 shown. Comparing the crystallization situation when adding ammonium sulfate and potassium carbonate, the crystallization is good only when the two catalysts are added at the same time, such as Figure 4 shown.

[0052] refer to figure 2 Taking the lignin-based hydrogen-bonded organic framework nanomaterial prepared in Example 1 of the present invention as an example for illustration, from figure 2 It can be seen from the figure that the ...

Embodiment 12

[0066] Antioxidant and bacteriostatic activity analysis of the fresh-keeping film that embodiment 12 obtains.

[0067] refer to Figure 9 , taking the lignin-based hydrogen-bonded organic framework nanomaterial and the lignin-based hydrogen-bonded organic framework-polyacrylonitrile plastic wrap prepared in Example 1 of the present invention as examples, the results are shown in Figure 9 ,from Figure 9 It can be seen that the lignin-based hydrogen-bonded organic framework nanomaterial and the lignin-based hydrogen-bonded organic framework-polyacrylonitrile cling film prepared by the present invention have good antibacterial properties without adding other bacteriostatic agents and antioxidants. Antioxidant and antibacterial activity, can play a very good role in antisepsis and preservation. PAN stands for polyacrylonitrile, HOF stands for lignin-based hydrogen-bonded organic framework nanomaterials

[0068] The analysis of the ultraviolet shielding rate of the plastic wra...

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Abstract

The invention relates to a lignin-based hydrogen bond organic framework nano-material and a preparation method and application thereof, lignin is used as a basic unit to form a lignin-based polyarylether polymer containing amide groups through arylether bond connection, and a lignin-based hydrogen bond organic framework is constructed by using hydrogen bond interaction between amide groups as a main body. The lignin-based hydrogen bond organic framework nano material synthesized by a solvothermal method has relatively high specific surface area and crystallinity. The lignin-based hydrogen bond organic framework nano material is added into polyacrylonitrile to prepare the polyacrylonitrile film, and the polyacrylonitrile film is used for food packaging, has good oxidation resistance, antibacterial activity and ultraviolet shielding function, also has high carbon dioxide / oxygen selective transmittance, proper water vapor transmittance and the like, and has good fresh-keeping effect on fruits and vegetables.

Description

technical field [0001] The invention belongs to the field of food packaging, and in particular relates to a lignin-based hydrogen-bonded organic framework nanomaterial and a preparation method and application thereof. Background technique [0002] Due to the short shelf life, foods such as fruits, vegetables, and fresh meat products are more perishable in the process of production, processing, and transportation. About one-third of the food in the world is lost and wasted every year. At the same time, gases such as carbon dioxide and sulfur dioxide and Toxic substances are continuously produced and discharged into the environment along with food spoilage, which not only affects the physical and chemical properties and taste of food, but also an indirect threat to environmental safety. Especially economically backward countries and regions lack proper food preservation facilities and conditions, and food corruption directly endangers people's lives. Therefore, a sustainable,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G65/48C08G65/40C08J5/18C08L71/10C08L33/20B82Y30/00B82Y40/00
CPCC08G65/48C08G65/4006C08J5/18B82Y30/00B82Y40/00C08J2333/20C08J2471/10Y02W90/10
Inventor 孔德明李占超李薇唐安娜朱莉娜
Owner NANKAI UNIV
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