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Preparation method of parenchymal cell cellulose and liquid metal nano-droplet composite membrane

A liquid metal, parenchyma cell technology, applied in the field of parenchyma cell cellulose/liquid metal nano-droplet composite membrane, to achieve the effect of good skin adhesion

Active Publication Date: 2022-05-13
KUNMING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] There is no report on the preparation of transparent or translucent stretchable composite membranes from parenchymal cell cellulose and liquid metal nano-droplets

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] Embodiment 1: The preparation of the parenchyma cell cellulose / liquid metal nano-droplet composite membrane is as follows:

[0020] (1) Cane pith preparation process

[0021] The unpithed bagasse is air-dried, and the water content of the air-dried raw material is 5%. The air-dried material is sieved through a bamboo sieve with an aperture of about 3mm to obtain rough cane pith, and then sieved through a 40-mesh but not more than 60-mesh sieve to obtain qualified sugarcane. marrow;

[0022] (2) The sieved raw materials are de-lignified by chlorine dioxide method

[0023] Put 20g of qualified cane pith and 800mL of deionized water into a conical flask, fill it with 10mL of chlorine dioxide gas, stir evenly, heat it in a water bath at 70°C for 7 hours, pour it into a 2000-mesh pulp cloth, and wash it repeatedly with deionized water , until the material is neutral, filter, and freeze-dry the filter residue to obtain cellulose;

[0024] (3) Removal of hemicellulose by or...

Embodiment 2

[0038] Embodiment 2: The preparation method of parenchyma cell cellulose / liquid metal nano-droplet composite membrane is as follows:

[0039] (1) Raw cane pith preparation process

[0040] The unpithed bagasse is air-dried, and the water content of the air-dried raw material is 10%. The air-dried material is sieved through a bamboo sieve with an aperture of about 5mm to obtain rough cane pith, and then sieved through a 180-mesh but not more than 300-mesh sieve to obtain qualified sugarcane. marrow;

[0041] (2) The sieved raw materials are de-lignified by chlorine dioxide method

[0042] Put 100g of qualified sugarcane pith and 4000mL of deionized water into a conical flask, fill with 50mL of chlorine dioxide gas, stir evenly, heat in a water bath at 80°C for 8 hours, pour it into a 2000-mesh pulp cloth, and use deionized water repeatedly Wash until the material is neutral, filter, and freeze-dry the filter residue to obtain cellulose;

[0043] (3) Removal of hemicellulose ...

Embodiment 3

[0057] Embodiment 3: The preparation method of parenchyma cell cellulose / liquid metal nano-droplet composite membrane is as follows:

[0058] (1) Raw cane pith preparation process

[0059] The unpithed bagasse is air-dried, and the water content of the air-dried raw material is 15%. The air-dried material is sieved through a bamboo sieve with an aperture of about 10mm to obtain rough cane pith, and is screened through a 280-mesh but not more than 400-mesh sieve to obtain qualified Cane pith;

[0060] (2) The sieved raw materials are de-lignified by chlorine dioxide method

[0061] Put 200g of qualified cane pith and 8000mL of deionized water into a conical flask, fill it with 100mL of chlorine dioxide gas, stir evenly, heat it in a water bath at 90°C for 9 hours, pour it into a 3000-mesh pulp cloth, and use deionized water repeatedly. Wash until the material is neutral, filter, and freeze-dry the filter residue to obtain cellulose;

[0062] (3) Removal of hemicellulose by o...

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Abstract

The invention discloses a preparation method of a parenchymal cell cellulose and liquid metal nano-droplet composite membrane, which comprises the following steps: by taking agricultural waste bagasse pith as a source of parenchymal cell cellulose, removing lignin by using a chlorine dioxide method, and then removing hemicellulose by using an organic guanidine aqueous solution method to obtain parenchymal cell cellulose; the method comprises the following steps: dissolving parenchyma cell cellulose through DMAC and LiCl to obtain a parenchyma cell cellulose dissolving solution; the preparation method comprises the following steps: ultrasonically dispersing liquid metal into nano liquid drops by using isopropanol, modifying by using APTES to obtain SML NDs, and finally preparing the composite membrane by using a grafting reaction caused by N, N-methylene bisacrylamide and ammonium persulfate among cellulose macromolecules. The composite film has antibacterial ability and stretchability, also has good physical strength, can be completely degraded, has low toxicity and good skin fitness, and provides a feasible scheme for expanding the application field of bagasse pith and improving the additional value of bagasse pith.

Description

technical field [0001] The invention relates to a parenchyma cell cellulose / liquid metal nano-droplet composite membrane with stretchable and antibacterial properties prepared by using the parenchyma cell cellulose extracted from the agricultural solid waste-cane pith, which belongs to the modification of natural polymers. field of material technology. Background technique [0002] In the past decade, electronic devices have been widely used in information, energy, medical, national defense and other fields. With the continuous improvement of people's use needs, electronic devices have gradually developed from the initial rigidity to the direction of flexibility and elasticity, which can meet their applications in wearable / implantable devices and other fields. Nowadays, as an important part of stretchable electronic devices --- the substrate generally chooses polyester resin (PET), polyethersulfone (PES), polyimide (PI), polyethylene naphthalate (PEN ), polycarbonate (PC),...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F251/02C08F222/38C08K9/06C08K3/08C08J5/18C08L51/02
CPCC08F251/02C08K9/06C08K3/08C08J5/18C08J2351/02C08F222/385
Inventor 高欣赵曜张恒
Owner KUNMING UNIV OF SCI & TECH
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