ISO 27447:2009 精细陶瓷 半导体光催化材料抗菌活性的试验方法

时间:2018-12-11 17:33:06 来源:CIAA 点击量:

ISO 27447:2009 精细陶瓷(高级陶瓷、高级工业陶瓷)半导体光催化材料抗菌活性的试验方法
ISO 27447:2009  Fine ceramics (advanced ceramics, advanced technical ceramics) -- Test method for antibacterial activity of semiconducting photocatalytic materials
 
ISO 27447:2009 specifies a test method for the determination of the antibacterial activity of materials that contain a photocatalyst or have photocatalytic films on the surface, by measuring the enumeration of bacteria under irradiation of ultraviolet light.
ISO 27447:2009 is intended for use with different kinds of semiconducting photocatalytic materials used in construction materials, in flat sheet, board, plate shape or textiles that are the basic forms of materials for various applications. It does not include powder, granular or porous photocatalytic materials.
This test method is usually applicable to photocatalytic materials produced for an antibacterial effect. Other types of performance of photocatalytic materials, i.e. decomposition of water contaminants, self-cleaning, antifogging and air purification, are not determined by this method.
The values expressed in ISO 27447:2009 are in accordance with the International System of Units (SI).
 
General information 
Status :  Published
Publication date : 2009-06
Edition : 1
Number of pages : 23
Technical Committee : ISO/TC 206 Fine ceramics
ICS : 81.060.30 Advanced ceramics

Foreword
ISO (the International Organization for Standardization) is a worldwide federation of national standards bodies (ISO member bodies). The work of preparing International Standards is normally carried out through ISO technical committees. Each member body interested in a subject for which a technical committee has been established has the right to be represented on that committee. International organizations, governmental and non-governmental, in liaison with ISO, also take part in the work. ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization.
International Standards are drafted in accordance with the rules given in the ISO/IEC Directives, Part 2.
The main task of technical committees is to prepare International Standards. Draft International Standards adopted by the technical committees are circulated to the member bodies for voting. Publication as an International Standard requires approval by at least 75 % of the member bodies casting a vote.
Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. ISO shall not be held responsible for identifying any or all such patent rights.
ISO 27447 was prepared by Technical Committee ISO/TC 206, Fine ceramics.
 
Introduction
As a result of continuing efforts to provide test methods for photocatalytic materials, this International Standard was developed for antibacterial activity. However, for test pieces with permeable or rough surfaces, etc., the antibacterial activity cannot be measured, so other test methods are required.
Under the irradiation of photons, photocatalysts show diverse functions, such as the decomposition of air and water contaminants, as well as deodorization, self-cleaning, antifogging and antibacterial actions. These functions of photocatalysts are generally based on the action of active oxygen species such as hydroxyl (OH) radicals formed on the surface of the photocatalyst (References [10] and [11] in the Bibliography). The energy- and labour-saving nature of photocatalysis has attracted keen interest when the photocatalyst is activated by sunlight (or artificial lighting).
Practical applications of photocatalysts, for both indoor and outdoor use, have rapidly expanded in recent years. Many kinds of photocatalytic materials have been proposed or are already commercialized, based on ceramics, glass, concrete, plastics, paper, etc. Such materials are produced by either the coating or mixing of a photocatalyst; in most cases, titanium dioxide (TiO2).
However, the effect of photocatalysis is not easily inspected visually, and no appropriate and official evaluation methods have been available to date. Some confusion has thus arisen as photocatalytic materials have been introduced. Furthermore, the above-mentioned diverse functions of photocatalysts cannot be evaluated with a single method; thus, it is required to provide different evaluation methods for air purification, water decontamination and self-cleaning.
This International Standard applies to testing the antibacterial activity of photocatalytic ceramics and other materials produced by either the coating or mixing of a photocatalyst. Standards for testing the antifungal activity that use photocatalytic materials will be developed separately.
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 specifies a test method for the determination of the antibacterial activity of materials that contain a photocatalyst or have photocatalytic films on the surface, by measuring the enumeration of bacteria under irradiation of ultraviolet light.
This International Standard is intended for use with different kinds of semiconducting photocatalytic materials used in construction materials, in flat sheet, board, plate shape or textiles that are the basic forms of materials for various applications. It does not include powder, granular or porous photocatalytic materials.
This test method is usually applicable to photocatalytic materials produced for an antibacterial effect. Other types of performance of photocatalytic materials, i.e. decomposition of water contaminants, self-cleaning, antifogging and air purification, are not determined by this method.
The values expressed in this International Standard are in accordance with the International System of Units (SI).
 
2   Normative references
The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.
ISO 31-0, Quantities and units — Part 0: General principles
 
3   Terms and definitions
For the purposes of this document, the following terms and definitions apply.
 
3.1 photocatalyst
substance that carries out many functions based on oxidization and reduction reactions under ultraviolet (UV) irradiation, including decomposition and removal of air and water contaminants, deodorization, and antibacterial, self-cleaning and antifogging actions
 
3.2 photocatalytic materials
materials in which, or on which, the photocatalyst is added by coating, impregnation, mixing, etc.
Note 1 to entry: Photocatalytic materials are to be used for building and road construction materials to obtain the functions mentioned in 3.1.
 
3.3 antibacterial
condition inhibiting the growth of bacteria on the surface of flat surface materials or cloths
 
3.4 photocatalyst antibacterial activity value for film adhesion method
difference between the total number of viable bacteria of photocatalytic treated flat surface materials and non-treated materials after UV irradiation
Note 1 to entry: This value includes the decrease of the number of bacteria without UV irradiation.
 
3.5 photocatalyst antibacterial activity value for glass adhesion method
difference between the total number of viable bacteria of photocatalytic treated cloths and standard cloths after UV irradiation
Note 1 to entry: This value includes the decrease of the number of bacteria without UV irradiation.
 
3.6 photocatalyst antibacterial activity value with UV irradiation for film adhesion method
difference between the total number of viable bacteria of photocatalytic treated flat surface materials after UV irradiation and photocatalytic treated flat surface materials in a dark place
 
3.7 photocatalyst antibacterial activity value with UV irradiation for glass adhesion method
difference between the total number of viable bacteria of photocatalytic treated cloths after UV irradiation and photocatalytic treated cloths in a dark place
3.8 film adhesion method

test method to evaluate the antibacterial performance of photocatalytic flat surface materials
 
3.9 glass adhesion method
test method to evaluate the antibacterial performance of photocatalytic cloths
 
3.10 fluorescent UV lamp
lamp that provides UV-A irradiation within a wavelength range of 300 nm to 400 nm
Note 1 to entry: A suitable lamp is the so-called black light blue (BLB) fluorescent lamp, with a maximum at 351 nm, as described in ISO 4892-3.

:: 转载本网专稿请注明出处"中国抗菌产业网"

地址:北京市海淀区中关村东路29号   邮编:100190   服务信箱:ciaa2001@126.com   协会QQ群号:42270357
服务电话:010-62521791  010-82543499  010-82543777
版权所有:北京云记科技有限公司  Copyright©2008-2016 kjj.com.cn All Rights Reserved
京ICP备06071330号  技术支持:五指互联