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Coating layers of a nanocomposite comprising a nano-cellulose material and nanoparticles

a technology of nano-cellulose and nanoparticles, which is applied in the field of multi-layers of cellulose nanomaterials, can solve the problems of material or article with optoelectronic properties that have so far been proved unsuccessful, and achieve the effect of increasing the efficiency of a greenhouse and enhancing the plasmonic

Inactive Publication Date: 2015-01-15
YISSUM RES DEV CO OF THE HEBREWUNIVERSITY OF JERUSALEM LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Benefits of technology

The patent describes a new type of material called nanocrystalline cellulose (NCC) which is made from pure cellulose fibers. These NCC fibers have a highly ordered structure that gives them exceptional strength and many other useful properties like conductivity and optical properties. The NCC can be processed into very strong composite materials. The patent also mentions that the text describes a way to prevent heat from escaping through infrared radiation, which can help to cool down in the sun and keep everything cooler at night.

Problems solved by technology

The ability to reduce the amounts of such polymers in polymeric articles, while maintaining mechanical integrity, yet endow the materials or articles with optoelectronic properties has thus far been proved unsuccessful for a variety of reasons.

Method used

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  • Coating layers of a nanocomposite comprising a nano-cellulose material and nanoparticles
  • Coating layers of a nanocomposite comprising a nano-cellulose material and nanoparticles
  • Coating layers of a nanocomposite comprising a nano-cellulose material and nanoparticles

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Embodiment Construction

Results

Preparation of Ordered NCC Films With or Without NPs

[0134]NCC solutions with or without nanoparticles (NPs) were dried in an oven at 37° C. The resulting films were analyzed using Magellan™ XHR scanning microscope. The NCC film displayed formation of highly ordered NCC layers having a thickness in the range of 5-20 nm (FIG. 1).

[0135]In addition, the hybrid NCC / NP film demonstrated the same ordered layers formation, but with nanoparticles trapped between the layers (FIG. 2).

Preparation of Hybrid Nanomaterials Made of Polyethylene (PE) and NCC

[0136]NCC coating on PE sheets was performed using N2 plasma jet treatment (50% power, 150 W for 5 min, as depicted in FIG. 3). Subsequently, the NCC was spread over the pre-treated PE sheet to form a thin layer. Finally, the PE / NCC sheet was dried in an oven at 37° C. The resulting hybrid sheet displayed uniform NCC coating on the PE sheet, unlike the untreated PE sample, from which the NCC coating was observed to peel off (FIG. 4).

Prepar...

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Abstract

The invention provides articles and methods for making such articles including a substrate coated on at least one region thereof with a layer of nanocomposites nano-cellulose materials and nanoparticles.

Description

FIELD OF THE INVENTION[0001]The present invention generally concerns multilayers of cellulose nanomaterials and uses thereof.BACKGROUND[0002]Nano Crystalline Cellulose (NCC) is one of the most exciting new bio-materials made from cellulose, the main component of cell walls of trees and plants, and which is present in waste streams of, e.g., paper mills and municipal sewage system sludge. In its almost-pure form, cellulose has a tiny crystalline molecular structure. NCC has intriguing properties and many potential applications. NCC may be present as liquid crystal solution in water and is known to self-assemble to macro scale ordered films having thicknesses at the nanoscale.[0003]The nano-sized crystals possess interesting size-dependent structural and optical properties. The ability to play with the processing variables allows one to control the structure, composition, size, and level of dispersion of such nano crystals.[0004]The routine and extensive use of plastic films composed ...

Claims

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Application Information

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IPC IPC(8): C09D101/02G02B5/20B05D3/00G02B1/10B05D1/00H01B1/20C09K11/02C08J7/048
CPCB05D1/007G02B5/208B05D3/007H01B1/20C09K11/025Y10T428/265C09D101/02G02B1/10B82Y30/00C08J5/005C08J2301/26C08J2303/02C08J2323/06C08J2329/04C08J2367/02C08J2367/04C08J2373/02C08J2401/02C09D11/108C08K3/08C08K3/10C08K3/22C08K7/16C09K11/883C09D7/67C09D7/68Y10T428/31978Y10T428/3188Y10T428/3179Y10T428/31971Y10T428/31982Y10T428/31703C08J7/048C08L1/04C08L23/06
Inventor SHOSEYOV, ODEDPALTIEL, YOSSEFYOCHELIS, SHIRABARUCH-SHARON, SIGALNEVO, YUVAL
Owner YISSUM RES DEV CO OF THE HEBREWUNIVERSITY OF JERUSALEM LTD
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