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Methods and compositions for on-demand release of ClO2 gas from UV-activated chlorite ion

A technology of chlorite and composition, applied in the field of controlled release of disinfectant gas, can solve problems such as difficulty in controlling the timing of ClO

Active Publication Date: 2018-07-31
WISCONSIN ALUMNI RES FOUND +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It is worth noting that the system will generate ClO in contact with moisture from any source 2 , so it is difficult to control ClO 2 timing

Method used

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  • Methods and compositions for on-demand release of ClO2 gas from UV-activated chlorite ion
  • Methods and compositions for on-demand release of ClO2 gas from UV-activated chlorite ion
  • Methods and compositions for on-demand release of ClO2 gas from UV-activated chlorite ion

Examples

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example

[0178] Example of Multilayer Film Embodiment - Produce Packaging Film

[0179] In some embodiments, a multilayer produce film includes a first layer and a chlorine dioxide generating layer. The chlorine dioxide generating layer comprises a polymer composition and a plurality of chlorite ions. The chlorine dioxide generating layer is substantially free of energy activated catalysts and substantially free of acid releasing compounds. In some embodiments, the plurality of chlorite ions are present in a salt selected from the group consisting of sodium chlorite, potassium chlorite, and mixtures thereof. In some embodiments, the film has at least 775 cm 3 / m 2 / 24 hours (50cm 3 / 100in 2 / 24 hours) oxygen transmission rate, such as at least 3100cm 3 / m 2 / 24 hours (200cm 3 / 100in 2 / 24 hours) oxygen transmission rate. In some embodiments, the first layer is an abuse resistant layer, wherein the abuse resistant layer is UV light transparent.

[0180] In some embodiments, t...

Embodiment 1

[0339] Example 1: 'On Demand' Release of Disinfectant Gas: From UV Activated NaClO in the Presence of Moisture 2 produce ClO 2 gas

[0340] In this exemplary embodiment, ClO is shown 2 Capable of converting solid sodium chlorite (NaClO 2 ) produced, whereby it is first "activated" with UV light under dry conditions and subsequently exposed to moisture to produce ClO at a later point in time when it is exposed to moisture 2 . This example includes continuous gas (N 2 ) to systematically investigate this phenomenon in flow cell devices. Specifically, this example demonstrates that NaClO 2 Samples can be activated by UV radiation under dry conditions to release ClO in the subsequent presence of moisture 2 . Second, it confirmed that the produced ClO 2 The amount varies as a function of the wavelength of UV radiation and moisture level. Third, it shows the total ClO from the sample 2 Production can be manipulated by varying the duration of UV exposure. Fourth, the exam...

Embodiment 2

[0362] Example 2: 'On Demand' Release of Disinfectant Gas: From NaClO-containing 2 A UV-activated polymer film generates ClO 2 gas

[0363] In this example, it demonstrates controlled ClO from a chlorite-containing polymer membrane 2 Gas released. This result shows that the polymer film introduced with chlorite ion can be used for ClO 2 controlled release. Thus, polymer films incorporating chlorite ions can be used to wrap or package products that would benefit from on-demand disinfection and / or deodorization, including without limitation medical devices or food products.

[0364] Film preparation. Polyvinyl alcohol (PVA) polymer (molecular weight=13000-23000gr / mol, Sigma Aldrich, 98% hydrolysis) and sodium chlorite (NaClO 2 ) salt (high purity grade, VWR International) was dissolved in deionized water to achieve ((0.05gr PVA-0.05gr NaClO 2 ) / 1mL solution). Fused silica substrates (cut into (2 cm × 2.5 cm) pieces) were cleaned with water, ethanol and water, then passed...

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Abstract

Compositions and methods for generating ClO2 gas are disclosed. A composition that includes a chlorite salt is activated by exposure to ultraviolet light. After an optional storage period, the composition is then exposed to moisture, resulting in the generation of ClO2 gas. Exemplary compositions include polymers in which the chlorite salt is dispersed. The polymers may be used to form films thatcan be used to package, e.g., food products, pharmaceutical products, medical devices, and / or laboratory devices. Upon exposure to ultraviolet light and moisture, the packaging releases controlled quantities of ClO2 gas, which may disinfect and / or deodorize the packaged device or product.

Description

[0001] Cross References to Related Applications [0002] This application claims the benefit of US Provisional Patent Application No. 62 / 206,464, filed August 18, 2015, which application is hereby incorporated by reference to the extent it does not conflict with the present disclosure. technical field [0003] The present disclosure generally relates to the controlled release of sterilant gases. Specifically, the present disclosure relates to the on-demand release of ClO from UV-activated chlorite ions in the presence of moisture 2 Gas compositions and methods. Background technique [0004] Chlorine dioxide (ClO 2 ) is a powerful oxidizer and disinfectant. It is currently mainly used in the bleaching process of the pulp industry and as a disinfectant for water treatment. It has proven to be a useful broad-spectrum fungicide in applications as diverse as food processing, fungus and mold fumigation, biofilm treatment, and even kills bedbugs and, where applicable, anthrax ...

Claims

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Application Information

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IPC IPC(8): B32B7/00B32B27/28B32B27/18B32B27/30B32B27/32B32B27/34B32B27/36B32B1/00C01B11/02C01B7/01C01B13/10A01N59/00A01N59/02A23L3/3409B32B27/00B32B7/02B32B7/10B32B27/06B32B7/12
CPCB32B27/32B32B27/06B32B27/00B32B27/30B32B27/306B32B27/08B32B27/20B32B33/00B65D65/40B32B2255/26B32B2307/31B32B2307/7145B32B2439/80B32B2439/00B32B7/12B32B27/18B32B27/28B32B27/304B32B27/322B32B27/34B32B27/36B32B2264/10B32B2307/40B32B2307/50B32B2307/71B32B2307/7242B32B2307/7244B32B2307/7246B32B2307/732B32B2307/748B32B2439/06B32B2439/46B32B2439/70B32B15/08B65D1/00B32B2255/10B32B2255/20B32B2255/205B32B15/20B65D81/24B32B1/00A61L2/20A61L2202/11B32B15/082B32B15/085A23B7/144B32B2315/00B32B2323/10B32B2405/00C08L23/12C08L2203/16B01J19/123B01J2219/0879B01J2219/1203C01B11/024C08K3/24
Inventor N·阿尔伯特R·简恩K·纳尔逊D·布希D·林恩
Owner WISCONSIN ALUMNI RES FOUND
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