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A kind of 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 field/electric field shielding, electrical components, etc., to achieve the effect of accelerating drying rate, improving mechanical strength and low cost

Active Publication Date: 2022-07-22
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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  • A kind of pineapple leaf fiber reinforced flexible electromagnetic shielding film and preparation method thereof
  • A kind of pineapple leaf fiber reinforced flexible electromagnetic shielding film and preparation method thereof
  • A kind of pineapple leaf fiber reinforced flexible electromagnetic shielding film and preparation method thereof

Examples

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Effect test

Embodiment 1

[0037] A pure pineapple leaf nanofiber film and a preparation method thereof, the preparation method comprising the following steps:

[0038] (1) Using chopped pineapple leaves with a length of 5 cm as the raw material, high-concentration dehydration was carried out at a concentration of 15%, and then the mesophyll-separated pineapple leaf fibers were screened with a flat slit screen with a slit width of 0.35 mm, and then the The beating machine carried out 3-stage gradient low-consistency beating according to the concentration of 4%, so that the beating degree of the pineapple leaf fiber was 40 °SR. The obtained fibers were pretreated by carboxymethylation, 10 g of dry fibers were dispersed in 100 g of ethanol and dipped for 30 min, and then 1 g of dry fibers corresponded to 1.1 g of sodium chloroacetate in a beaker, and the ratio was 1: 1: Add an equal amount of water to dissolve sodium chloroacetate in a mass ratio of 1, then weigh sodium hydroxide according to the amount o...

Embodiment 2

[0042] A pineapple leaf fiber-reinforced flexible electromagnetic shielding film and a preparation method thereof, the preparation method comprising the following steps:

[0043] (1) Using chopped pineapple leaves with a length of 5 cm as the raw material, high-concentration dispersing was carried out at a concentration of 20%, and then the mesophyll-separated pineapple leaf fibers were screened with a flat slit screen with a slit width of 0.15 mm, and then the The beating machine performed 3-stage gradient low-consistency beating according to the concentration of 8%, so that the beating degree of the pineapple leaf fiber was 55 °SR. The obtained fibers were pretreated by carboxymethylation, 10 g of dry fibers were dispersed in 200 g of ethanol and dipped for 15 min, and then 1 g of dry fibers corresponding to 0.9 g of sodium chloroacetate were weighed in a beaker, and the ratio was 1: 1: Add the same amount of water to dissolve sodium chloroacetate in a mass ratio of 1, then ...

Embodiment 3

[0048] A pineapple leaf fiber-reinforced flexible electromagnetic shielding film and a preparation method thereof, the preparation method comprising the following steps:

[0049] (1) Using chopped pineapple leaves with a length of 5 cm as the raw material, high-concentration dehydration was carried out according to the concentration of 25%, and then the mesophyll-separated pineapple leaf fibers were screened with a flat slit screen with a slit width of 0.5 mm, and then the The beating machine performed 3-stage gradient low-consistency beating according to the concentration of 4%, so that the beating degree of the pineapple leaf fiber was 65 °SR. The obtained fibers were pretreated by carboxymethylation, 10 g of dry fibers were dispersed in 200 g of ethanol and dipped for 15 min, and then 1 g of dry fibers corresponded to 1.1 g of sodium chloroacetate in a beaker, and the ratio was 1: 1: Add an equal amount of water to dissolve sodium chloroacetate in a mass ratio of 1, then we...

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Abstract

The invention provides an ultra-thin, light-weight, flexible, high-strength, high-conductivity pineapple leaf fiber-reinforced electromagnetic shielding film and a preparation method thereof. In the present invention, the high aspect ratio one-dimensional pineapple leaf micro- and nanofibers extracted from the whole pineapple leaves are combined with highly conductive two-dimensional transition metal carbide Ti. 3 C 2 T x MXenes combine to form a mechanically interlocked structure to enhance Ti 3 C 2 T x The flexibility and mechanical strength of the base film, and at the same time endow the composite film with excellent electrical conductivity and electromagnetic shielding properties, providing a new process for the application and development of biomass-based wearable electromagnetic shielding films, for the green development of agricultural by-products, and Resource and high-value utilization provides a new way.

Description

technical field [0001] The invention belongs to the field of cellulose-based flexible electromagnetic shielding materials, in particular to an ultra-thin, lightweight, 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 bananas and mangoes, pineapples are grown in 82 countries around the world, covering an area of ​​more than 1 million hectares. In 2028, the global output of pineapples is expected to reach 31 million tons, which has become an indispensable source of income for farmers. missing part. However, in the process of harvesting and producing pineapples, a large number of by-products such as peel, leaves and crowns are produced, which account for 30-35% of the weight of the whole fresh pineapple, that is, about 76.4 million tons of pineapple by-products can be produced globally every year. At...

Claims

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Application Information

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Patent Type & Authority Patents(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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