1、Fine ceramics (advanced ceramics, advanced technical ceramics) Test method for self-cleaning performance of semiconducting photocatalytic materials under indoor lighting environment Measurement of water contact angleBS ISO 19810:2017BSI Standards PublicationWB11885_BSI_StandardCovs_2013_AW.indd 1 15
2、/05/2013 15:06National forewordThis British Standard is the UK implementation of ISO 19810:2017.The UK participation in its preparation was entrusted to Technical Committee RPI/13, Advanced technical ceramics.A list of organizations represented on this committee can be obtained on request to its sec
3、retary.This publication does not purport to include all the necessary provisions of a contract. Users are responsible for its correct application.ISBN 978 0 580 87009 5ICS 81.060.30Compliance with a British Standard cannot confer immunity from legal obligations. This British Standard was published u
4、nder the authority of the Standards Policy and Strategy Committee on 31 May 2017.Amendments/corrigenda issued since publicationDate Text affected BRITISH STANDARDBS ISO 19810:2017 ISO 2017Fine ceramics (advanced ceramics, advanced technical ceramics) Test method for self-cleaning performance of semi
5、conducting photocatalytic materials under indoor lighting environment Measurement of water contact angleCramiques techniques Mthode dessai relative aux proprits autonettoyantes des matriaux photocatalytiques semiconducteurs dans un environnement dclairage intrieur Mesurage de langle de contact de le
6、auINTERNATIONAL STANDARDISO19810First edition2017-04-01Reference numberISO 19810:2017(E)BS ISO 19810:2017ISO 19810:2017(E)ii ISO 2017 All rights reservedCOPYRIGHT PROTECTED DOCUMENT ISO 2017, Published in SwitzerlandAll rights reserved. Unless otherwise specified, no part of this publication may be
7、reproduced or utilized otherwise in any form or by any means, electronic or mechanical, including photocopying, or posting on the internet or an intranet, without prior written permission. Permission can be requested from either ISO at the address below or ISOs member body in the country of the requ
8、ester.ISO copyright officeCh. de Blandonnet 8 CP 401CH-1214 Vernier, Geneva, SwitzerlandTel. +41 22 749 01 11Fax +41 22 749 09 47copyrightiso.orgwww.iso.orgBS ISO 19810:2017ISO 19810:2017(E)Foreword iv1 Scope . 12 Normative references 13 Terms and definitions . 14 Principle 35 Test apparatus . 35.1
9、Instruments and apparatus 35.2 Reagents 45.3 Laboratory temperature and humidity 46 Test piece preparation 47 Test procedures . 47.1 Measurement of water contact angle 47.2 Test piece pretreatment 57.3 Visible light irradiation and measurement of contact angle after n h of visible light irradiation,
10、 4(n) . 67.3.1 Measurement of illuminance and preparation of test piece placement location . 68 Calculation of test results 88.1 Guide to the rounding of numbers . 88.2 Calculation of contact angle . 88.3 Conditions for a valid test 98.4 Initial contact angle halving time, n1/298.5 Contact angle red
11、uction time, n10. 99 Reporting of test results 1010 Test measurement examples 10Bibliography .12 ISO 2017 All rights reserved iiiContents PageBS ISO 19810:2017ISO 19810:2017(E)ForewordISO (the International Organization for Standardization) is a worldwide federation of national standards bodies (ISO
12、 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, gover
13、nmental 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.The procedures used to develop this document and those intended for its further maintena
14、nce are described in the ISO/IEC Directives, Part 1. In particular the different approval criteria needed for the different types of ISO documents should be noted. This document was drafted in accordance with the editorial rules of the ISO/IEC Directives, Part 2 (see www.iso.org/directives).Attentio
15、n 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. Details of any patent rights identified during the development of the document will be in the Introduction an
16、d/or on the ISO list of patent declarations received (see www.iso.org/patents).Any trade name used in this document is information given for the convenience of users and does not constitute an endorsement.For an explanation on the voluntary nature of standards, the meaning of ISO specific terms and
17、expressions related to conformity assessment, as well as information about ISOs adherence to the World Trade Organization (WTO) principles in the Technical Barriers to Trade (TBT) see the following URL: www.iso.org/iso/foreword.html.This document was prepared by Technical Committee ISO/TC 206, Fine
18、ceramics.iv ISO 2017 All rights reservedBS ISO 19810:2017Fine ceramics (advanced ceramics, advanced technical ceramics) Test method for self-cleaning performance of semiconducting photocatalytic materials under indoor lighting environment Measurement of water contact angle1 ScopeThis document specif
19、ies a test method for the determination of the self-cleaning performance of sheet-form materials that contain an indoor-light-active photocatalyst or have indoor-light-active photocatalytic films on the surface, under indoor lighting environment.This method is used to measure the change of water con
20、tact angle under indoor lighting environment, which is one of the indices reflecting the self-cleaning performance of semiconducting photocatalytic materials.This document is not applicable to permeable materials on which water droplets cannot hold and rough materials which obscure water droplets. T
21、his document is not applicable to materials of which the changes in the water contact angle due to decomposition of adhered organic matter cannot be evaluated because even if the surface is clean the water contact angle is remarkably large or the water contact angle cannot be sufficiently increased
22、by attaching organic matter to the surface.2 Normative referencesThe following documents are referred to in the text in such a way that some or all of their content constitutes requirements of this document. For dated references, only the edition cited applies. For undated references, the latest edi
23、tion of the referenced document (including any amendments) applies.ISO 10677, Fine ceramics (advanced ceramics, advanced technical ceramics) Ultraviolet light source for testing semiconducting photocatalytic materialsISO 14605, Fine ceramics (advanced ceramics, advanced technical ceramics) Light sou
24、rce for testing semiconducting photocatalytic materials used under indoor lighting environmentISO 27448, Fine ceramics (advanced ceramics, advanced technical ceramics) Test method for self-cleaning performance of semiconducting photocatalytic materials Measurement of water contact angle3 Terms and d
25、efinitionsFor the purposes of this document, the terms and definitions given in ISO 27448 and the following apply.ISO and IEC maintain terminological databases for use in standardization at the following addresses: IEC Electropedia: available at http:/www.electropedia.org/ ISO Online browsing platfo
26、rm: available at http:/www.iso.org/obp3.1photocatalystmaterial in which or on which the photocatalyst is added by coating, impregnation, mixing, etc.Note 1 to entry: Materials include ceramic, metal, plastic, paper, cloth, etc. for general purposes.INTERNATIONAL STANDARD ISO 19810:2017(E) ISO 2017 A
27、ll rights reserved 1BS ISO 19810:2017ISO 19810:2017(E)3.2photocatalytic materialsmaterial in which or on which the photocatalyst is added by coating, impregnation, mixing, etc.3.3semiconducting photocatalystsubstance that displays photocatalytic action based on its electronic band structureNote 1 to
28、 entry: This applies to metal oxides like titanium dioxide, and sulfides. Photocatalysts which are not semiconducting includes metal complexes.3.4self-cleaning effectmaintenance of surface cleanliness of a material by employing a photocatalyst loaded onto the surfaceNote 1 to entry: Self-cleaning us
29、ing photocatalysis is achieved through decomposition of surface contaminants by redox reactions, and/or hydrophilicity that allows stains or dirt to be easily removed by the flow of (rain)water over the surface.Note 2 to entry: Examples include glass, tiling and other facings for buildings, and plas
30、tics and coatings for general purposes.3.5indoor lighting environmentindoor lighting environment with an artificial light source for general lighting service that does not include sunlightNote 1 to entry: For the purposes of photocatalytic activity characterization, a clear definition of spectral ra
31、nge and intensity is normally required.3.6indoor-light-active photocatalystsubstance that carries out many functions based on oxidization and reduction reactions produced by an artificial light source for general lighting service, including decomposition and removal of air and water contaminants, de
32、odorization, and antibacterial, antifungal, self-cleaning and antifogging actions3.7contact angle before pretreatment1water contact angle before pretreatment by UV irradiation and coating with organic matter3.8contact angle after UV irradiation and before coating2water contact angle after pretreatme
33、nt by UV irradiation and before coating with organic matter3.9initial contact angle3water contact angle after pretreatment by UV irradiation and coating with organic matter and immediately before starting visible light irradiation (water contact angle after 0 h of visible light irradiation)3.10conta
34、ct angle after n h of visible light irradiation4(n)water contact angle after applying visible light irradiation for n hNote 1 to entry: The unit of time may also be in days, minutes, and seconds in addition to hours.2 ISO 2017 All rights reservedBS ISO 19810:2017ISO 19810:2017(E)3.11initial contact
35、angle halving timen1/2time required for water contact angle to reach half the value of the initial contact angle 3due to visible light irradiation3.12contact angle reduction time (10)n10time required for water contact angle to reach 10 due to visible light irradiation3.13test piece setmultiple test
36、pieces of the same material, treated under the same conditions, to investigate time-series changes in a water contact angle by sequential measurement under identical visible light irradiation conditions4 PrincipleThis test method measures the time until a water contact angle increased by attaching o
37、rganic matter to a test piece is reduced due to decomposition of the organic matter by the photocatalytic effect of visible light irradiation, thus provides an index of the self-cleaning performance of an indoor-light-active photocatalytic material. First, the test piece is irradiated with UV light
38、to remove any organic matter adsorbed to its surface, and organic matter for test purposes (stearic acid) is then applied to the test piece by a previously established method. Next, the initial contact angle is measured, and the test piece is then irradiated with a given amount of visible light. The
39、 time-series changes in the contact angle due to visible light irradiation are measured, and the elapsed time from the start of visible light irradiation until the contact angle reaches half of the initial value and until the contact angle reaches 10 or lower are determined.5 Test apparatus5.1 Instr
40、uments and apparatus5.1.1 Black light blue fluorescent lamp, as specified by ISO 10677.NOTE In general, the lamp recommended for use is an ultraviolet fluorescent lamp which produces ultraviolet rays termed UVA and has a peak emission at 351 nm, employing blue glass which absorbs visible light.5.1.2
41、 Ultraviolet light irradiation apparatus, as specified by ISO 27448.5.1.3 Ultraviolet light radiometer, as specified by ISO 10677.5.1.4 Visible light source (fluorescent lamp and UV cut filter).Indoor illumination environment condition (Condition A) shall be used with a cool white halophosphate fluo
42、rescent lamp and a UV sharp cut filter designated as Type A from among those specified by ISO 14605, with an attached cover which transmits light longer than wavelengths of 400 nm. Fluorescent lamps shall be warmed up for 15 min before use to stabilize output.5.1.5 Visible light irradiating apparatu
43、s.To ensure uniform irradiation of test piece sets by light produced by the lamp, allow for blocking of light from surroundings, and allow for adjustment of illuminance, the test piece or the position of the lamp shall be movable. If a lamp reflector is attached, it shall employ a material with litt
44、le absorption of visible light and degradation under visible light conditions and the structure shall allow for measurement of ISO 2017 All rights reserved 3BS ISO 19810:2017ISO 19810:2017(E)illuminance where the test piece is located. Illuminance at the test piece surface shall be adjustable over a
45、 threefold or greater range.5.1.6 Illuminometer, as specified by ISO 14605.5.1.7 Contact angle measurement apparatus, as specified by ISO 27448.5.2 Reagents5.2.1 Stearic acid, of assay (cGC) 60,0 % or higher.5.2.2 n-Heptane, of assay (cGC) 99,0 % or higher.5.2.3 Water, distilled water or water of eq
46、uivalent purity.5.3 Laboratory temperature and humidityThe laboratory should be preferably kept at a temperature (23 5) C, relative humidity (501020+) % or a temperature (20 5) C, relative humidity (65 10) %. The laboratory temperature and humidity in use shall be documented in the reports of test r
47、esults.6 Test piece preparationPreparation of test pieces shall be as follows.a) Test pieces: Test pieces shall be prepared by cutting a square 50 2 mm in size from the flat portion of a semiconducting photocatalytic material. During preparation of test pieces, due care shall be taken to avoid conta
48、mination by oils or other such organic matter and cross-contamination between semiconducting photocatalytic materials. Test pieces should be taken from the semiconducting photocatalytic material itself, but if the shape of a semiconducting photocatalytic material makes preparation of test pieces dif
49、ficult, test pieces may be prepared on a separate flat sheet made from the same starting material and processed identically. A single test piece set comprises multiple test pieces prepared from the same material under the same conditions to investigate time-series changes in a water contact angle through sequential measurement of the water contact angle under identical visible light irradiation conditions.b) Number of test pieces: Each test piece set shall include a sufficient number of test pieces need
