ISO 17094-2014 精细陶瓷(高级陶瓷, 高级工业陶瓷). 室内照明环境下半导体光催化材料的抗菌活性的试验方法

ISO 17094:2014 Fine ceramics (advanced ceramics, advanced technical ceramics) — Test method for antibacterial activity of semiconducting photocatalytic materials under indoor lighting environment

 

Introduction

A test method for cloths or textiles is not included in this International Standard because of a lack of indoor-light-active photocatalytic cloths or textiles. When indoor-light-active photocatalytic cloths or textiles have been developed, a suitable test method will be proposed with the remediated glass adhesion method given in ISO 27447.

WARNING Handling and manipulation of microorganisms that are potentially hazardous requires a high degree of technical competence. Only personnel trained in microbiological techniques should carry out tests.

 

1   Scope

This International Standard presents a test method for determining the antibacterial activity of materials that contain an indoor-light-active photocatalytic material or have indoor-light-active photocatalytic films on the surface by measuring the survival of bacteria after illumination with indoor light.

It is intended for use with different kinds of indoor-light-active photocatalytic materials used in construction materials in flat sheet, board or plate shape that are the basic forms of materials for various applications. It does not include powder, granular, or porous indoor-light-active photocatalytic materials, nor is it applicable to cloths or textiles.

It is applicable to indoor-light-active photocatalytic materials produced for antibacterial application. Other types of performance of indoor-light-active photocatalytic materials, i.e. decomposition of water contaminants, self-cleaning, antifogging, and air purification, cannot be determined by this method.

 

2   Normative references

The following documents, in whole or in part, are normatively referenced in this document and are indispensable for its application. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.

ISO 27447, Fine ceramics (advanced ceramics, advanced technical ceramics) — Test method for antibacterial activity of semiconducting photocatalytic materials

ISO 14605, Fine ceramics (advanced ceramics, advanced technical ceramics) — Light source for testing semiconducting photocatalytic materials used under indoor lighting environment

 

3   Terms and definitions

For the purposes of this document, the following terms and definitions apply.

3.1

photocatalyst

substance that performs one or more functions based on oxidization and reduction reactions under photoirradiation, including decomposition and removal of air and water contaminants, deodorization, and antibacterial, antifungal, self-cleaning, and antifogging actions

3.2

indoor-light-active photocatalyst

photocatalyst that functions under illumination with artificial light used for general lighting purposes

3.3

indoor lighting environment

illumination with artificial light source(s) used for general lighting purposes and excluding sunlight

3.4

indoor-light-active photocatalytic material

material in which or on which the indoor-light-active photocatalyst is added by coating, impregnation, mixing, etc

3.5

antibacterial

condition inhibiting the growth of bacteria on the surface of flat surface materials

3.6

indoor-light-active photocatalyst antibacterial activity value

numerical difference between the logarithmic values of the total number of viable bacteria on the indoor- light-active photocatalytic treated material and non-treated material after indoor light illumination

Note 1 to entry: This value includes the decrease of number of bacteria without indoor light illumination.

3.7

indoor-light-active photocatalyst antibacterial activity value with indoor light illumination

numerical difference between the logarithmic values of the total number of viable bacteria on the indoor-light-active photocatalytic treated material after indoor light illumination and the same material kept in the dark