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Method for producing conductive polymer and cellulose nanocomposites

A technology of conductive polymers and nanocomposites, applied in chemical instruments and methods, conductive materials, conductive materials, etc., can solve the problems of high brittleness, limited potential applications, poor elasticity, etc.

Active Publication Date: 2016-05-25
颜宁
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Additionally, cellulose-polypyrrole composites reported in the literature appear as black opaque solids (film or paper-like), which limits their potential applications
Some cellulose-polypyrrole composites have poor elasticity and high brittleness [16]

Method used

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  • Method for producing conductive polymer and cellulose nanocomposites
  • Method for producing conductive polymer and cellulose nanocomposites
  • Method for producing conductive polymer and cellulose nanocomposites

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0068] Embodiment 1: Preparation of PPy-NCC nanoparticles

[0069] A 9 g sample of micron-sized (about 20 microns, Aldrich product) microcrystalline cellulose powder was dispersed in 500 ml of water for 5 minutes, and the dispersion was collected in a sintered glass crucible (vehicle). The washed cellulose sample was redispersed in water (approximately 285.039 ml) by normal agitation.

[0070] Add about 4.897ml (0.05M) of p-dodecylbenzenesulfonic acid (surfactant - Aldrich product) and about 10.064ml (0.5M) of pyrrole (monomer - Aldrich monomer) to the cellulose sample beaker to make The total volume reaches about 300ml. The dispersion mixture was allowed to completely cover and soak in the monomer with normal stirring for 2 hours.

[0071] The collected monomer-treated cellulose in a sintered glass crucible (vehicle) was washed thoroughly in water followed by a wash with the same concentration of monomeric pyrrole (0.5M). At this point, the dispersion is monomer-treated mi...

Embodiment 2

[0079] Example 2: Properties of Conductive Nanocomposite Films

[0080] figure 2 (a)-(h) show slide 12 and NCC-PPy coated slide 14. The free-standing membrane 16 is prepared with good flexibility and mechanical strength. Given the small particle size and stable colloidal form, typical standard film processing methods are applicable (eg dip coating, film casting, printing, etc.). Transparent and very thin (<3 μm) NCC-PPy films on glass slides were obtained by casting and drying at ambient temperature. Thin flexible free-standing film has good optical clarity and can be bent without breaking.

[0081] Using the four-probe method, the electrical resistance of the NCC-PPy transparent coating on the glass slide was measured. The average resistivity of a transparent NCC-PPy coating with a thickness of 2.3 μm on a glass slide is 1.74x10 5 Ohm / square (Ω / □), the corresponding conductivity is σ=2.499x10 -2 S / cm. NCC-PPy (2.3 μm thick) and NCC (0.7 μm thick) coated slides were sc...

Embodiment 3

[0095] Example 3: Scanning and Transmission Electron Microscopy Analysis of Particle Morphology

[0096] For scanning electron microscopy (SEM) analysis, dried MCC and MCC-PPy powders were spread on aluminum sample holders (1 cm in diameter) containing double-sided carbon-coated adhesive tape. The morphology of the sputter-coated samples was examined by a Hitachi S-2500 scanning electron microscope (Hitachi Inc. USA) with an accelerating voltage of 15 kV at a working distance of 15 mm. TEM analysis of NCC and NCC-PPy was performed using Hitachi HD-2000STEM (Scanning Transmission Electron Microscope, scanning transmission electron microscope) (Hitachi Inc., USA). The samples consisted of diluted NCC-PPy and NCC colloidal droplets on a TEM grid.

[0097] SEM images of MCC and MCC-PPy particles are shown in Figure 5 middle. In larger magnified SEM images (2 μm x 2 μm) of MCC-PPy, the small particle shapes on the MCC surface are generally attributed to polypyrrole. Transmissi...

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Abstract

Methods of making conductive polymer and cellulose nanocomposite particles and nanocomposite materials are provided. The conductive polymer-coated cellulose microparticles are added to an acidic solution for initiating an acid hydrolysis reaction for a defined time interval to form conductive polymer-coated cellulose nanoparticles. After quenching the acid hydrolysis reaction, the nanoparticles were isolated to obtain a colloidal solution of conductive nanoparticles. The conductive nanoparticles can then be formed into a solid nanocomposite material such as a conductive film. The transparent conductive film is prepared by forming a thin layer with a thickness of micron order or submicron order.

Description

[0001] Related Applications Cited [0002] This application claims priority to U.S. Provisional Application No. 61 / 333,953, filed May 12, 2010, entitled "METHODOF PRODUCTION ELECTRICALLY CONDUCTIVE POLYMERAND CELLULOSENANOCOMPOSITES (Methods of Producing Conductive Polymers and Cellulose Nanocomposites)," the contents of which are incorporated herein by reference. into this article. Background of the invention [0003] The present disclosure relates to polymer-cellulose composites, and in particular, the present disclosure relates to conductive polymer-cellulose nanocomposites. [0004] Cellulose is one of the earth's most abundant renewable biomaterials. It is a linear polycondensate of glucose units linked together by β-1,4 glycosidic bonds. Although commonly found in nature as fibrous materials with amorphous and crystalline regions, by acid hydrolysis methods, highly crystalline nanocellulose materials in the form of needles and spheres can be prepared [1–4]. [0005] M...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08J5/18C08J7/04C09D179/04C09D5/24C09K19/00G01N27/327H01M4/36H05F1/02C09D7/65
CPCC08J5/18C08J2300/12C08K7/02C08K9/04C08K9/10C08L1/04C08L101/10C09D5/24C09D179/04H01M4/366H01M4/60H01M4/62H01M4/621H01M4/622H01M10/0525C09D7/65C09D7/67C09D7/70H01M4/608H01B1/127Y02E60/10C08L79/04H01M4/624H01M2220/20
Inventor 赛德·艾博萨吉尔·皮特柴-麦迪恩颜宁
Owner 颜宁