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Pineapple leaf fiber reinforced flexible electromagnetic shielding film and preparation method thereof

A technology of pineapple leaf fiber and electromagnetic shielding film, applied in the direction of magnetic/electric field shielding, electrical components, etc., to achieve the effects of accelerating drying rate, improving mechanical strength, and low cost

Active Publication Date: 2022-01-04
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The technical problem solved by the present invention is to provide a pineapple leaf fiber-reinforced flexible electromagnetic shielding film and a preparation method thereof. The pineapple leaf micro- and nanocellulose / Ti 3 C 2 T x The composite conductive film has the characteristics of ultra-thin, light weight, high strength, and high conductivity. In addition, this application is conducive to solving the environmental problems caused by the use of bleaching agents and electromagnetic radiation pollution in chemical pulping, and provides resources for the utilization of agricultural waste. a new way

Method used

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  • Pineapple leaf fiber reinforced flexible electromagnetic shielding film and preparation method thereof
  • Pineapple leaf fiber reinforced flexible electromagnetic shielding film and preparation method thereof
  • Pineapple leaf fiber reinforced flexible electromagnetic shielding film and preparation method thereof

Examples

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Effect test

Embodiment 1

[0037] A kind of pure pineapple leaf nanofiber film and preparation method thereof, its preparation method comprises the steps:

[0038] (1) Use short-cut pineapple leaf pieces with a length of 5 cm as raw materials, perform high-concentration deconcentration at a concentration of 15%, and then use a flat slotted sieve with a slot width of 0.35 mm to screen the pineapple leaf fibers separated from the mesophyll, and then use the Wali The beating machine carried out three-stage gradient low-consistency beating according to the concentration of 4%, so that the beating degree of pineapple leaf fiber was 40°SR. The obtained fiber adopts the carboxymethylation pretreatment method, disperses 10 g of dry fiber in 100 g of ethanol and soaks for 30 min, then weighs in a beaker according to 1.1 g of sodium chloroacetate corresponding to 1 g of dry fiber, and press 1: Add an equal amount of water to dissolve sodium chloroacetate at a mass ratio of 1, then weigh sodium hydroxide according...

Embodiment 2

[0042] A flexible electromagnetic shielding film reinforced by pineapple leaf fibers and a preparation method thereof, the preparation method comprising the steps of:

[0043] (1) Using short-cut pineapple leaf pieces with a length of 5 cm as raw materials, perform high-concentration deconcentration at a concentration of 20%, and then use a flat slotted sieve with a slot width of 0.15 mm to screen the pineapple leaf fibers separated from the mesophyll, and then use the Wali The beating machine performs three-stage gradient low-consistency beating according to the concentration of 8%, so that the beating degree of the pineapple leaf fiber is 55°SR. The obtained fiber adopts the carboxymethylation pretreatment method, disperses 10 g of dry fiber in 200 g of ethanol and soaks for 15 min, then weighs 0.9 g of sodium chloroacetate in a beaker according to 1 g of dry fiber, and press 1: Add an equal amount of water to dissolve sodium chloroacetate at a mass ratio of 1, then weigh so...

Embodiment 3

[0048] A flexible electromagnetic shielding film reinforced by pineapple leaf fibers and a preparation method thereof, the preparation method comprising the steps of:

[0049] (1) Use short-cut pineapple leaf pieces with a length of 5 cm as raw materials, perform high-concentration deconcentration at a concentration of 25%, and then use a flat slotted sieve with a slot width of 0.5 mm to screen the pineapple leaf fibers separated from the mesophyll, and then use the Wali The beating machine performs three-level gradient low-consistency beating according to the concentration of 4%, so that the beating degree of pineapple leaf fiber is 65°SR. The obtained fiber adopts the carboxymethylation pretreatment method, disperses 10 g of dry fiber in 200 g of ethanol and soaks for 15 min, then weighs in a beaker according to 1.1 g of sodium chloroacetate corresponding to 1 g of dry fiber, and press 1: Add an equal amount of water to dissolve sodium chloroacetate at a mass ratio of 1, the...

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Abstract

The invention provides an ultrathin, light, flexible, high-strength and high-conductivity pineapple leaf fiber reinforced electromagnetic shielding film and a preparation method thereof. A mechanical interlocking structure is formed by combining high-length-diameter-ratio one-dimensional pineapple leaf micro-nano fibers extracted from whole pineapple leaves with high-conductivity two-dimensional transition metal carbide Ti3C2Tx MXene, the flexibility and mechanical strength of the Ti3C2Tx-based film are improved, meanwhile, the composite film is endowed with excellent conductivity and electromagnetic shielding performance, a new process is provided for application and development of the biomass-based wearable electromagnetic shielding film, and a new way is provided for green and environment-friendly development and recycling and high-value utilization of agricultural by-products.

Description

technical field [0001] The invention belongs to the field of cellulose-based flexible electromagnetic shielding materials, and in particular relates to an ultrathin, light, flexible, high-strength and high-conductivity pineapple leaf fiber-reinforced electromagnetic shielding film and a preparation method thereof. Background technique [0002] As the third largest tropical fruit in the world after banana and mango, pineapple is planted in 82 countries around the world, with an area of ​​more than 1 million hectares. It is estimated that the global pineapple output will reach 31 million tons in 2028, which has become an indispensable income for farmers. missing part. However, during the harvesting and production of pineapples, a large number of by-products such as peels, leaves and tree crowns are produced, which account for 30-35% of the weight of the whole fresh pineapple, that is, the world can produce about 76.4 million tons of by-products of pineapple every year. Produc...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L1/28C08K3/14C08J5/18H05K9/00
CPCC08J5/18H05K9/0081C08J2301/28C08K3/14
Inventor 陈港钱杨杨刘义军王淳玉
Owner SOUTH CHINA UNIV OF TECH
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