Active and adaptive photochromic fibers, textiles and membranes

A photochromic and thermochromic technology, applied in fiber processing, fiber chemical characteristics, textiles and papermaking, etc., can solve the problem of reducing the quantum efficiency of materials

Inactive Publication Date: 2007-04-04
UNIVERSITY OF DELAWARE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

While this can increase the concentration of photochromic groups in the sample, it can also significantly reduce the quantum efficiency of materials containing photochromic properties

Method used

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  • Active and adaptive photochromic fibers, textiles and membranes
  • Active and adaptive photochromic fibers, textiles and membranes
  • Active and adaptive photochromic fibers, textiles and membranes

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0043] Embodiments include fibers composed of a polymer matrix. In PMMA (M W =540,000) embedded in the following photochromic molecules:

[0044]

[0045] Wherein the average value of n is 7-8.

[0046] DYE3 is of the same formula as DYE1 and where n=1.

[0047] DYE1 shown above is a photochromic backbone polymer comprising 7-8 repeating units (degree of polymerization (DP) = 7-8), while DYE2 shown above is a photochromic molecule with specially selected terminal groups (Stellacci F, Bertarelli C, Toscano F, Gallazzi MC, Zerbi G, CHEM PHYS LETT 302(5-6):563-570, 1999 ("Stellacci")). DYE3 has the same chemical formula as DYE1 and where n=1.

[0048] To prepare electrospun fibers, PMMA and either DYE1 or DYE2 were dissolved in CHCl using specific concentrations as shown in Table 1. 3 middle. The resulting DYE1 (or DYE2)+PMMA solution was then electrospun using the designed treatment scheme. Specific parameters used for the first set of experiments described below are s...

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Abstract

A process to make a dyed fiber which has the steps of mixing a dye capable of changing color and a polymer into a solution at a temperature below the temperature at which the dye or polymer degrades to form a polymer dye solution and electrospinning said polymer dye solution to form a fiber wherein the dye penetrates more than the surface of the fiber. The invention also relates to the fiber and use of the fiber.

Description

[0001] related application [0002] This application claims priority to US Provisional Application Serial No. 60 / 553,513, filed March 16, 2004, the entire contents of which are hereby incorporated by reference. [0003] official license [0004] This work was supported by the National Science Foundation grant numbers DMR-0210223 and CHE-0346454. Background technique [0005] The use of dyes and pigments to color materials is well known in the art. Unfortunately, pigments and dyes coloration agents are affected by fading due to exposure to UV light, ozone or bleach. The usual cause of this fading is a chemical change in the colorant. This chemical change alters the electronic transitions of the colorant, causing unwanted color instability. [0006] One reason for dye fading is that the dye is applied to the surface of the fiber rather than completely mixed with the fiber. [0007] The study of structure / property relationships of materials often requires manipulation of the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D01F1/06D04H1/728
CPCG11B7/245D01D5/003F41H3/02D01F6/16D01F1/06G11B7/246D01D5/0038
Inventor 约翰·F·拉博尔特安德烈亚·比安科
Owner UNIVERSITY OF DELAWARE
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