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Nanostructured articles and methods of making nanostructured articles

A nanostructure and microstructure technology, applied in the fields of nanostructure manufacturing, nanotechnology, nanotechnology, etc., can solve problems such as restricting commercial feasibility, and achieve the effect of reducing reflectivity

Inactive Publication Date: 2012-01-18
3M INNOVATIVE PROPERTIES CO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Because of this requirement for extreme vacuum conditions, the commercial viability of the method is limited

Method used

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  • Nanostructured articles and methods of making nanostructured articles
  • Nanostructured articles and methods of making nanostructured articles
  • Nanostructured articles and methods of making nanostructured articles

Examples

Experimental program
Comparison scheme
Effect test

example 1

[0109] According to the method described in U.S. Patent No. 5,104,929 (Bilkadi), Nalco2327, SR444 (pentaerythritol triacrylate), A-174 (methacryloxypropyltrimethoxysilane) and Irgacure TM 184 (photoinitiator) made a 40% by weight 20 nm silica particle-filled acrylic coating. The coating formulation was then diluted with isopropanol (IPA) to form a 50% by weight solution. Then, the coating formulation was coated on virgin 2 mil PET film. The solution was pumped into the coating mold with a syringe, the coating was dried by passing it through an oven set at 120°C and then cured with a UV source. The thickness of the resulting cured coating was approximately 4 microns. The samples were treated by oxygen plasma with different treatment times (30, 60, 90, 120, 150 and 180 seconds). Measure the average % reflectance and record it in Table 1. Samples 2-7 gave significant reflectance reduction and the 90 second treatment provided the best reflectance performance.

[0110] Tabl...

example 2

[0113]SR295 (pentaerythritol tetraacrylate) (240 gm), SR238 (hexanediol diacrylate) (240 gm) and SR506 (isobornyl acrylate) (120 gm) were combined and mixed. A 1 quart jar was filled with 5 nm silica particles Nalco 2326 (400 gm). 1-Methoxy-2-propanol (450 gm), 3-(methacryloxy)propyltrimethoxysilane (27.82 gm) and 5% Prostab 5128 (hindered amine nitrogen oxide inhibitor) in water (0.23 gm) were mixed together and added to the colloidal dispersion with stirring. The jar was sealed and heated to 80°C for 16 hours. The surface modified silica dispersion (1166 gm), the resin mixture of SR295, SR238 and SR506 (70 gm), and 5% Prostab in water (058 gm) were combined and mixed. Water and 1-methoxy-2-propanol were removed from the mixture by rotary evaporation. The resulting clarified SiO 2 Composition of resin mixture (184.6 gm). The weight percent of modified silica in the formulation was about 60% by weight. A silica particle concentration of 20 nm was prepared using the same ...

example 3

[0117] Will be POSS by MA0736 TM Molecules (available from Hybrid Plastics, Inc. (Hattiesburg, MS)), CN991 (aliphatic urethane acrylates from Sartomer (Exton, PA)), CN2303 (alkoxylated polyfunctional acrylates from Sartomer oligomers), tetrahydrofurfuryl alcohol (TFHA) and Lucirin TM A coating solution made of a blend of TPO-L (photoinitiator, from BASF) was applied to virgin PET film and cured by a UV source. Then, the coated film was treated with oxygen plasma for 90 seconds. The percent reflectance was measured and recorded in Table 4 along with the formulation and treatment conditions

[0118] Table 4: Reflectance results for plasma treated samples of Example 3

[0119]

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Abstract

A nanostructured article comprises a matrix and a nanoscale dispersed phase. The nanostructured article has a random nanostructured anisotropic surface.

Description

technical field [0001] The present invention relates to nanostructured articles that are useful, for example, as antireflective articles. In another aspect, the invention relates to methods for making nanostructured articles. Background technique [0002] Whenever light passes from one medium to another, some portion of the light is reflected by the interface between the two media. For example, about 4-5% of the light shining on a light-transmissive plastic substrate is reflected by the top surface. [0003] A few different approaches have been taken to reduce the reflectance of polymeric materials. One approach is to reduce reflections using antireflection (AR) coatings such as multilayer reflective coatings consisting of transparent thin film structures with alternating layers of very different refractive indices. However, it has proven difficult to achieve broadband antireflection using AR coatings. [0004] Another approach involves the use of sub-wavelength surface ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B82B3/00B82B1/00
CPCB81B2201/047B81C1/00031G02B1/118B81B2203/0361Y10T428/24355
Inventor 莫塞斯·M·大卫安德鲁·K·哈策尔蒂莫西·J·赫布林克余大华张俊颖
Owner 3M INNOVATIVE PROPERTIES CO
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