DIN EN 16845-1-2017 Photocatalysis - Anti-soiling chemical activity using adsorbed organics under solid solid conditions - Part 1 Dyes on porous surfaces German version EN 16845-1 .pdf

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1、May 2017 English price group 15No part of this translation may be reproduced without prior permission ofDIN Deutsches Institut fr Normung e. V., Berlin. Beuth Verlag GmbH, 10772 Berlin, Germany,has the exclusive right of sale for German Standards (DIN-Normen).ICS 25.220.20!%d“2659661www.din.deDIN EN

2、 16845-1Photocatalysis Antisoiling chemical activity using adsorbed organics under solid/solid conditions Part 1: Dyes on porous surfaces;English version EN 168451:2017,English translation of DIN EN 16845-1:2017-05Photokatalyse Schmutzabweisende chemische Aktivitt unter Verwendung adsorbierender org

3、anischer Stoffe im Zustand fest/fest Teil 1: Farbstoffe auf porsen Oberflchen;Englische Fassung EN 168451:2017,Englische bersetzung von DIN EN 16845-1:2017-05Photocatalyse Activit chimique antisalissures laide de matires organiques adsorbes dans des conditions solide/solide Partie 1: Colorants sur d

4、es surfaces poreuses;Version anglaise EN 168451:2017,Traduction anglaise de DIN EN 16845-1:2017-05www.beuth.deDocument comprises pagesDTranslation by DIN-Sprachendienst.In case of doubt, the German-language original shall be considered authoritative.3104.17DIN EN 16845-1:2017-05 2 A comma is used as

5、 the decimal marker. National foreword This document (EN 16845-1:2017) has been prepared by Technical Committee CEN/TC 386 “Photocatalysis” (Secretariat: AFNOR, France). The responsible German body involved in its preparation was DIN-Normenausschuss Materialprfung (DIN Standards Committee Materials

6、Testing), Working Committee NA 062-02-93 AA “Photocatalysis”. In addition to the legal units of measurement, this standard also uses the unit (bar). It should be noted that the Gesetz ber Einheiten im Messwesen (German Law on units in metrology) prohibits the use of this unit for official and commer

7、cial purposes in Germany. Conversion: 1 bar = 105Pa. Part 2 of this standard series, “Simulated weathering conditions”, which is referenced in the European Foreword, is currently in preparation. Users of the German translation of this document should note the following: In the English reference vers

8、ion, e.g., “f” “volumetric spraying flow (cm3s1)” has been translated by “f” “Sprhmenge, in cm3s1”, as a quantity (Menge) is sprayed and not a flow (Durchfluss). In addition, in 8.2.3, “the duration of this spraying time shall allow the collection of a measurable mass on the balance, say grams”, Men

9、ge (“quantity”) has been used in the German version. The same applies to “Fi” “mass flow (g s1)”, which has been translated by “Fi” “Durchflussmenge, in g s1”. In Table 1 and in 7.2, MW stands for “molecular weight” (German: Moleklmasse). The DIN Standard corresponding to the International Standard

10、referred to in this document is as follows: ISO 5725-2 DIN ISO 5725-2 National Annex NA (informative) Bibliography DIN ISO 5725-2, Accuracy (trueness and precision) of measurement methods and results Part 2: Basic method for the determination of repeatability and reproducibility of a standard measur

11、ement method EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 16845-1 March 2017 ICS 25.220.20 English Version Photocatalysis - Anti-soiling chemical activity using adsorbed organics under solid/solid conditions - Part 1: Dyes on porous surfaces Photocatalyse - Activit chimique anti-salissures l

12、aide de matires organiques adsorbes dans des conditions solide/solide - Partie 1: Colorants sur des surfaces poreuses Photokatalyse - Schmutzabweisende, chemische Aktivitt unter Verwendung adsorbierender organischer Stoffe im Zustand fest/fest - Teil 1: Farbstoffe auf porsen Oberflchen This European

13、 Standard was approved by CEN on 14 November 2016. CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references conc

14、erning such national standards may be obtained on application to the CEN-CENELEC Management Centre or to any CEN member. This European Standard exists in three official versions (English, French, German). A version in any other language made by translation under the responsibility of a CEN member in

15、to its own language and notified to the CEN-CENELEC Management Centre has the same status as the official versions. CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France,

16、Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and United Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALISATION EUROPISCHE

17、S KOMITEE FR NORMUNG CEN-CENELEC Management Centre: Avenue Marnix 17, B-1000 Brussels 2017 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 16845-1:2017 EEN 16845-1:2017 (E) 2 Contents Page European foreword . 4 1 Scope 5 2 Normativ

18、e references 5 3 Terms and definitions . 5 4 Symbols and abbreviations . 6 5 Principle . 7 6 Instruments . 7 6.1 Spraying system . 7 6.2 Analytical balance . 9 6.3 Diffuse Reflectance Spectrometer 10 6.4 Light source 10 6.5 Other experimental needs 10 7 Materials 10 7.1 Dyes used 10 7.2 Preparation

19、of Solutions to Spray 11 7.3 Test Samples 11 7.4 Other experimental needs 11 8 Procedure 11 8.1 General Aspects 11 8.1.1 General . 11 8.1.2 Initial set up and calibration 12 8.1.3 Measurement of the Reflectance Spectra of the Surface 12 8.2 Optimization of the Experimental Setup . 12 8.2.1 General .

20、 12 8.2.2 Optimization of the Spraying Distance and Flow 12 8.2.3 Measurement of the Spraying Flow Rate . 12 8.2.4 Evaluation of the Deposition Rate (DR) . 13 8.3 Test Procedure 13 8.3.1 Evaluation of the Dirt Parameter Calibration Function . 13 8.3.2 Choice of Test Sample Covered with Dye for Irrad

21、iation . 14 8.3.3 Evaluation of the Photocatalytic Self-cleaning Performance . 14 8.3.4 Results 15 9 Calculation 15 9.1 General . 15 9.2 Spraying Flow (f) 15 9.3 Dirt Parameter 16 9.4 Covered Area 16 9.5 Deposition Rate . 17 9.6 Standard Spraying Time 17 9.7 Dirt Parameter Calibration Function 18 9.

22、8 Remaining Dye (i) after Different Times of Irradiation. 18 9.9 Dye Half-Life . 18 10 Precision and Reproducibility . 19 DIN EN 16845-1:2017-05 EN 16845-1:2017 (E) 3 11 Test Method for Samples with Low to Negligible Performance . 19 12 Test Report 19 Annex A (informative) Typical Experimental Data

23、. 21 A.1 General . 21 A.2 Optimization of the Spraying Conditions (example) . 21 A.3 Measurement of the Spraying Mass Flows (example) . 22 A.4 Measurement of the Covered Area (example) . 23 A.5 Evaluation of the Dirt Parameter Calibration Function (example) 25 A.6 Evaluation of the Self-cleaning Eff

24、ect (example) . 27 Bibliography . 29 DIN EN 16845-1:2017-05 EN 16845-1:2017 (E) 4 European foreword This document (EN 16845-1:2017) has been prepared by Technical Committee CEN/TC 386 “Photocatalysis”, the secretariat of which is held by AFNOR. This European Standard shall be given the status of a n

25、ational standard, either by publication of an identical text or by endorsement, at the latest by September 2017, and conflicting national standards shall be withdrawn at the latest by September 2017. Attention is drawn to the possibility that some of the elements of this document may be the subject

26、of patent rights. CEN shall not be held responsible for identifying any or all such patent rights. EN 16845, Photocatalysis Anti-soiling chemical activity using adsorbed organics under solid/solid conditions, is dedicated to anti-soiling chemical activity using adsorbed organics under solid/solid co

27、nditions and is constituted by the following parts: Part 1: Dyes on porous surfaces; Part 2: Simulated weathering conditions. According to the CEN-CENELEC Internal Regulations, the national standards organisations of the following countries are bound to implement this European Standard: Austria, Bel

28、gium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Serbia, Slovakia, Slovenia, Spain, Swede

29、n, Switzerland, Turkey and the United Kingdom. DIN EN 16845-1:2017-05 EN 16845-1:2017 (E) 5 1 Scope This European Standard specifies a test method for the evaluation of the photocatalytic self-cleaning performance of materials showing photocatalytic activity, usually based on semiconducting metal ox

30、ides such as titanium dioxide, by the measurement under solid/solid conditions of the decolouring ability under irradiation with ultraviolet light (UV-A) of a test sample on which a dye solution is sprayed and dried. This European Standard is intended for use with opaque and rough surfaces of differ

31、ent kinds, such as construction materials in flat sheet, board or plate shape, that are the basic forms of materials for various applications. This European Standard also applies to fabric, plastic or composites containing photocatalytic materials that are not soluble in acetone. This European Stand

32、ard does not apply to photocatalytic glass, granular materials (unless they are deposited in compact films or layers over flat solid surface) and flat non porous materials. The method evaluates only the self-cleaning ability of the material under ultraviolet light irradiation. It cannot be applicabl

33、e to evaluate other performance attributes of photocatalytic materials, i.e. decomposition of water contaminants in liquid or gas phases contacting the material, and antifogging and antibacterial actions. 2 Normative references The following documents, in whole or in part, are normatively referenced

34、 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. CEN/TS 16599, Photocatalysis - Irradiation conditions for testing photocatalyti

35、c properties of semiconducting materials and the measurement of these conditions CEN/TS 16981, Photocatalysis Glossary of terms EN ISO/IEC 17025, General requirements for the competence of testing and calibration laboratories (ISO/IEC 17025:2005) 3 Terms and definitions For the purposes of this docu

36、ment, the terms and definitions given in CEN/TS 16981 and the following apply. 3.1 self-cleaning ability of a material to maintain clean or to clean itself if soiled on its surface 3.2 photocatalytic self-cleaning self-cleaning ability of a material as a consequence of the irradiation of the materia

37、l surface with UVVISIR radiation 3.3 spraying distance distance from the outlet of the spraying gun (see experimental setup) and the surface of the test sample DIN EN 16845-1:2017-05 EN 16845-1:2017 (E) 6 3.4 covered area CA area of the sample where the colour intensity is exp(2) 13,5% of the maximu

38、m intensity 3.5 dirt parameter DP dye amount spread or persistent over the sample surface 3.6 dirt parameter calibration function mathematical function that describes the relation between the Dirt Parameter and the amount of dye spread over the sample surface 4 Symbols and abbreviations a, b, c poly

39、nomial constant parameters obtained by the fit using Formula (7) Anet() Net Absorbance of the dye covering of the sample surface at the wavelength CA Covered Area (cm2) Cdyeconcentration of the dye in the spraying solution (g cm3) dacdensity of acetone at the temperature of the measurement (g cm3) D

40、P dirt parameter (nm): the parameter is indexed depending on the context DR deposition rate (g s1cm2) f volumetric spraying flow (cm3s1) Fimass flow (g s1) kdyefirst order kinetic constant of the specified dye for the photocatalytic self-cleaning process (min1) MW molecular weight n number of steps

41、used for deposition of the dye on the sample surface; typically, n = 5, but can be larger if the surface is excessively wet R() spectral reflectance at the wavelength of the sample surface; R() has indexes i and j referring to steps of spraying and illumination, respectively Rbackground() reflectanc

42、e of the pristine surface at the wavelength SC standard dye covering defined in Table 2 (g cm2) T temperature in C tiirradiation time in min tsprspraying time (s), calculated as tspr= sprstdt /n W the full width at half maximum (FWHM) of the sprayed dye colour peak (cm) average covering of dye at th

43、e surface (g cm2); indexes i and j refer to steps of spraying and illumination, respectively omaximum average covering of dye at the surface (g cm2), obtained at sprstdt DIN EN 16845-1:2017-05 EN 16845-1:2017 (E) 7 wavelength (nm) maxwavelength (nm) at which there is a maximum of absorbance sprstdt

44、standard spraying time (s) 1/2dyehalf-life of the dye for the photocatalytic self-cleaning process (min) 5 Principle This standard concerns the comparison and the quality assurance of photocatalytic materials used as self-cleaning materials. The method described is intended to measure the photocatal

45、ytic self-cleaning performance of a photocatalytic material by evaluating its ability to clean its surface, previously covered by a known amount of coloured organic compound, as a consequence of the exposition to ultraviolet light. A controlled amount of a dye solution dissolved in a volatile solven

46、t (acetone) is spread on the tested surface by using a spraying gun. The photocatalytic material turns out to be covered by the solid dye. The relation between the amount of the spread dye and the spectrophotometric reflectance is defined in the calibration step. The calibration function involves th

47、e measurement of the reflectance spectra of the sample surface as a function of the dyes covering. Dyes used in separate experiments are Metanil Yellow, Rhodamine B, and Methylene Blue. The test shall be carried out with the dye showing the maximum optical contrast with the material to be tested. Cr

48、iteria for the choice of the best dye are here given (see 8.3.2). Optionally, the test can be carried out with the others dyes as the reactivity of each dye can depend on the specimen. The measurement with more than one dye is encouraged, but it is not compulsory. The self-cleaning activity measured

49、 by this test shall be referred to the used dye. The soiled surface is then irradiated in air by UV-A light under defined conditions and the decrease of the dye amount on the surface is monitored by measuring the reflectance spectra of the surface of the test sample in the visible range. By using the calibration function the change of the reflectance spectra can be related to the kinetic of disappearance of the dye from the surface. The photocatalytic self-cleaning performance is determined as the