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Holocellulose-based friction nano-generator

A nano-generator and whole cellulose technology, applied in triboelectric generators, fiber processing, plant fibers, etc., can solve the problem of limited ability to generate surface charges, and achieve high electrical output performance, simple structure, and wide application prospects. Effect

Active Publication Date: 2020-06-30
GUANGXI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the weak polarization of natural cellulose nanofibrils leads to its limited ability to generate surface charges, and it is usually used as a triboelectric positive material.

Method used

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  • Holocellulose-based friction nano-generator

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] (1) Preparation of cation-modified cellulose nanofibril-based airgel membrane:

[0023] Step 1: Add glycidyltrialkylammonium chloride to the cellulose nanofibril aqueous solution at a mass ratio of 10% to the cellulose nanofibril, stir magnetically at 60°C for 4 hours, and dilute with 5 times deionized water , then vacuum filtered, and washed 3 times, and the product was dried at 65°C;

[0024] Step 2: Prepare the cationically modified cellulose nanofibrils obtained in Step 1 into an aqueous solution with a concentration of 1 wt%, add a small amount of epichlorohydrin (EPI), and react in LiOH / urea solution to prepare a hydrogel , and then freeze-dried to obtain an airgel, and then pressed under a pressure of 1Mpa to obtain an airgel film with a thickness of 5mm.

[0025] (2) Preparation of cellulose nanofibril-based airgel membrane:

[0026] The cellulose nanofibrils were formulated into an aqueous solution with a concentration of 1 wt%, added a small amount of epichl...

Embodiment 2

[0031] (1) Preparation of cation-modified cellulose nanofibril-based airgel membrane:

[0032] Step 1: Add glycidyltrialkylammonium chloride to the cellulose nanofibril aqueous solution at a mass ratio of 30% to the cellulose nanofibril, stir magnetically at 65°C for 5 hours, and dilute with 5 times deionized water , then vacuum filtered, and washed 3 times, and the product was dried at 65°C;

[0033] Step 2: The cationically modified cellulose nanofibrils obtained in Step 1 are made into an aqueous solution with a concentration of 1 wt%, adding a small amount of epichlorohydrin (EPI), and reacting in LiOH / urea solution to prepare a hydrogel , and then freeze-dried to obtain an airgel, and then pressed under a pressure of 1.3Mpa to obtain an airgel film with a thickness of 10mm.

[0034] (2) Preparation of cellulose nanofibril-based airgel membrane:

[0035] The cellulose nanofibrils were made into an aqueous solution with a concentration of 1wt%, added a small amount of epi...

Embodiment 3

[0040] (1) Preparation of cation-modified cellulose nanofibril-based airgel membrane:

[0041] Step 1: Add glycidyltrialkylammonium chloride to the cellulose nanofibril aqueous solution at a mass ratio of 50% to the cellulose nanofibril, stir magnetically at 70°C for 6h, and dilute with 5 times deionized water , then vacuum filtered, and washed 3 times, and the product was dried at 65°C;

[0042] Step 2: The cationically modified cellulose nanofibrils obtained in Step 1 are made into an aqueous solution with a concentration of 1 wt%, adding a small amount of epichlorohydrin (EPI), and reacting in LiOH / urea solution to prepare a hydrogel , and then freeze-dried to obtain an airgel, and then pressed under a pressure of 1.5Mpa to obtain an airgel film with a thickness of 15mm.

[0043] (2) Preparation of cellulose nanofibril-based airgel membrane:

[0044] The cellulose nanofibrils were made into an aqueous solution with a concentration of 1wt%, added a small amount of epichlor...

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Abstract

The invention discloses a holocellulose-based friction nano-generator. According to the holocellulose-based friction nano-generator, a cellulose nano-fibril-based aerogel film modified by positive ions is used as a friction electronegative material, and the cellulose nano-fibril-based aerogel film is used as a friction electropositive material; cellulose conductive composite electrode materials are arranged on the back faces of the cellulose nano-fibril-based aerogel films modified by the cations and the back faces of the cellulose nano-fibril-based aerogel films, and a gap is formed between the two aerogel films. The surface charge quantity of the holocellulose-based friction nano-generator is increased by 10-500%, the short-circuit current is increased by 20-500%, and the open-circuit voltage is increased by 50-500%. The holocellulose-based friction nano-generator is short in technological process, simple in equipment and low in cost, the electric output performance is remarkably improved, and the holocellulose-based friction nano-generator has wide application prospects in the field of flexible wearable sensing devices.

Description

technical field [0001] The invention belongs to the field of high-value utilization of cellulose biomass and frictional nanogenerators, in particular to a full cellulose-based frictional nanogenerator. Background technique [0002] Among various energy harvesting devices, triboelectric nanogenerators (TENGs) have become a self-powered device with great development potential, which can harvest energy from the surrounding environment for mechanical motion, such as the kinetic energy of the human body, wind energy, etc. making them suitable for use in portable soft electronics. In addition, TENGs are characterized by high output voltage, high power density, high energy conversion efficiency, environmental friendliness, and low fabrication cost. [0003] Cellulose, the most abundant natural polymer on Earth, is widely available, biodegradable, and inexpensive. The use of cellulose nanofibrils for the development of triboelectric nanogenerators can lead to a more green and eco-...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02N1/04B01J13/00D06M13/463C08J5/18D06M101/06
CPCH02N1/04B01J13/0091D06M13/463C08J5/18D06M2101/06C08J2301/02
Inventor 聂双喜蔡晨晨
Owner GUANGXI UNIV
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