Nanocellulose/MXene/silver nanowire sandwich structure composite film and preparation method thereof

A technology of nanocellulose and silver nanowires, applied in the fields of magnetic/electric field shielding, electrical components, etc., can solve the problems of high surface roughness and poor mechanical and chemical stability of pure silver nanowire films

Inactive Publication Date: 2021-07-06
BEIJING FORESTRY UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Pure silver nanowire films have defects such as high surface roughness, poor mechanical and chemical stability

Method used

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  • Nanocellulose/MXene/silver nanowire sandwich structure composite film and preparation method thereof
  • Nanocellulose/MXene/silver nanowire sandwich structure composite film and preparation method thereof
  • Nanocellulose/MXene/silver nanowire sandwich structure composite film and preparation method thereof

Examples

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Embodiment 1

[0045] A kind of MXene / silver nanowire / nanocellulose composite film and preparation method thereof, comprising the following process steps:

[0046] (1) Dissolve 0.1g of sodium bromide and 0.015g of 2,2,6,6-tetramethylpiperidine-nitrogen-oxide (TEMPO) in 100mL of deionized water; crush 1g of softwood pulp and add the above mixed solution In the process, stir mechanically for 5 minutes, ultrasonically for 20 minutes to further disperse evenly; slowly add 5 mmol / g sodium hypochlorite solution dropwise at 30°C, and stir while adding; add 0.5M sodium hydroxide dropwise to maintain the pH value of the above dispersion at 9.7~ 10.2 After reacting for 5 hours, add 10 mL of ethanol dropwise, and then add hydrochloric acid solution dropwise to adjust the pH value to about 7; wash the above-mentioned oxidized wood pulp fibers with deionized water, disperse the washed product in water, and centrifuge at 9000 rpm for 40 minutes at high speed. Collect the supernatant; process the supernata...

Embodiment 2

[0054] A kind of MXene / silver nanowire / nanocellulose composite film and preparation method thereof, comprising the following process steps:

[0055] (1) Dissolve 0.11g of sodium bromide and 0.018g of 2,2,6,6-tetramethylpiperidine-nitrogen-oxide (TEMPO) in 100mL of deionized water; pulverize 1.5g of softwood pulp, add the above mixed In the solution, mechanically stir for 10 minutes, ultrasonic for 15 minutes to further disperse evenly; slowly add 4mmol / g sodium hypochlorite solution dropwise at 35°C, and stir while adding; add 0.5M sodium hydroxide dropwise to maintain the pH value of the above dispersion at 9.7 ~10.2, after reacting for 5 hours, add 15mL ethanol dropwise, then add dropwise hydrochloric acid solution to adjust the pH value to about 7; wash the above-mentioned oxidized wood pulp fiber with deionized water, disperse the washed product in water, and centrifuge at 10000rpm for 30min , collect the supernatant; process the supernatant with a high-pressure homogenize...

Embodiment 3

[0063] A kind of MXene / silver nanowire / nanocellulose composite film and preparation method thereof, comprising the following process steps:

[0064] (1) Dissolve 0.1g of sodium bromide and 0.016g of 2,2,6,6-tetramethylpiperidine-nitrogen-oxide (TEMPO) in 100mL of deionized water; crush 1.5g of coniferous wood pulp, add the above mixed In the solution, mechanically stir for 10 minutes, ultrasonic for 15 minutes to further disperse evenly; slowly add 5 mmol / g sodium hypochlorite solution dropwise at 30°C, and stir while adding; add 0.5M sodium hydroxide dropwise to maintain the pH value of the above dispersion at 9.7 ~10.2, after reacting for 5 hours, add 15mL ethanol dropwise, then add dropwise hydrochloric acid solution to adjust the pH value to about 7; wash the above-mentioned oxidized wood pulp fiber with deionized water, disperse the washed product in water, and centrifuge at 10000rpm for 30min , collect the supernatant; process the supernatant with a high-pressure homogen...

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Abstract

The invention discloses a nano cellulose/MXene/silver nanowire sandwich structure composite film and a preparation method thereof. The method mainly comprises the following steps of: (1) preparing a nanocellulose colloidal solution by a TEMPO oxidation method; (2) preparing a single-layer MXene colloidal solution by an MILD method; (3) preparing a silver nanowire colloidal solution by a polyol reduction method; (4) mixing the MXene colloidal solution and the silver nanowire colloidal solution according to a certain mass ratio to obtain a uniform mixed solution; and (5) carrying out alternative suction filtration on the mixed solution and the nanocellulose colloidal solution, and carrying out hot-pressing drying to obtain the nanocellulose/MXene/silver nanowire sandwich structure composite film. According to the nanocellulose/MXene/silver nanowire sandwich structure composite film and the preparation method thereof, the prepared film has good conductivity, broadband high electromagnetic shielding effectiveness and good mechanical performance and antibacterial performance, the preparation method is simple and easy to implement, the preparation process is safe and environmentally friendly, and batch production is facilitated.

Description

technical field [0001] The invention relates to the technical field of energy materials, in particular to a nanocellulose / MXene / silver nanowire "sandwich" structure composite film and a preparation method thereof. Background technique [0002] Flexible wearable electronic devices generally refer to electronic devices or devices that are flexible and can be directly or indirectly attached to the skin. Its mechanical flexibility can serve different working environments, but the corresponding technical requirements restrict its development. Since the production of circuit materials is difficult to guarantee deformation without losing its own electronic properties, in addition, the preparation conditions of flexible electronics and the performance of various electronic devices are quite different from traditional electronic devices. Flexible wearable electronic devices are widely used, and the research enthusiasm remains high. At present, the research on them has entered the su...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J5/18C08L1/04C08K7/06C08K3/14H05K9/00
CPCC08J5/18H05K9/0081C08J2301/04C08K7/06C08K3/14C08K2201/011
Inventor 王蓓蓓刘毅张伟业赵俊淇孙璟萌李彦辰郭洪武
Owner BEIJING FORESTRY UNIVERSITY
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