1、Paints and varnishes WettabilityPart 7: Measurement of the contact angle on a tilt stage (roll-off angle)BS ISO 19403-7:2017BSI Standards PublicationWB11885_BSI_StandardCovs_2013_AW.indd 1 15/05/2013 15:06 ISO 2017Paints and varnishes Wettability Part 7: Measurement of the contact angle on a tilt st
2、age (roll-off angle)Peintures et vernis Mouillabilit Partie 7: Mesurage de langle de contact sur un plan inclin (angle dcroulement)INTERNATIONAL STANDARDISO19403-7First edition2017-06Reference numberISO 19403-7:2017(E)National forewordThis British Standard is the UK implementation of ISO 19403-7:201
3、7.The UK participation in its preparation was entrusted to Technical Committee STI/10, Test methods for paints.A list of organizations represented on this committee can be obtained on request to its secretary.This publication does not purport to include all the necessary provisions of a contract. Us
4、ers are responsible for its correct application. The British Standards Institution 2017 Published by BSI Standards Limited 2017ISBN 978 0 580 87400 0ICS 01.040.87; 87.040Compliance with a British Standard cannot confer immunity from legal obligations.This British Standard was published under the aut
5、hority of the Standards Policy and Strategy Committee on 31 July 2017.Amendments/corrigenda issued since publicationDate Text affectedBRITISH STANDARDBS ISO 194037:2017 ISO 2017Paints and varnishes Wettability Part 7: Measurement of the contact angle on a tilt stage (roll-off angle)Peintures et vern
6、is Mouillabilit Partie 7: Mesurage de langle de contact sur un plan inclin (angle dcroulement)INTERNATIONAL STANDARDISO19403-7First edition2017-06Reference numberISO 19403-7:2017(E)BS ISO 194037:2017ISO 19403-7:2017(E)ii ISO 2017 All rights reservedCOPYRIGHT PROTECTED DOCUMENT ISO 2017, Published in
7、 SwitzerlandAll rights reserved. Unless otherwise specified, no part of this publication may be 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
8、be requested from either ISO at the address below or ISOs member body in the country of the requester.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 194037:2017ISO 19403-7:2017(E)ii ISO 2017
9、 All rights reservedCOPYRIGHT PROTECTED DOCUMENT ISO 2017, Published in SwitzerlandAll rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized otherwise in any form or by any means, electronic or mechanical, including photocopying, or posting on the int
10、ernet 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 requester.ISO copyright officeCh. de Blandonnet 8 CP 401CH-1214 Vernier, Geneva, SwitzerlandTel. +41 22 749 01 11Fax +41 22 749 09 47copy
11、rightiso.orgwww.iso.orgISO 19403-7:2017(E)Foreword ivIntroduction v1 Scope . 12 Normative references 13 Terms and definitions . 14 Principle 25 Apparatus and materials 26 Sampling 47 Procedure. 47.1 General for measuring the roll-off angle . 47.1.1 Setting up the contact angle measuring system . 47.
12、1.2 Test conditions. 57.1.3 Conditioning of the test panels 57.2 Measurement 57.2.1 General 57.2.2 Application of the drop . 57.2.3 Determination of the roll-off angle 68 Precision . 89 Test report . 8Annex A (informative) Notes on sampling and treatment of test specimens 10Annex B (informative) Fac
13、tors influencing the roll-off angle 11Bibliography .13 ISO 2017 All rights reserved iiiContents PageBS ISO 194037:2017ISO 19403-7:2017(E)ForewordISO (the International Organization for Standardization) is a worldwide federation of national standards bodies (ISO member bodies). The work of preparing
14、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 liaiso
15、n 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 maintenance are described in the ISO/IEC Direct
16、ives, 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).Attention is drawn to the possibility that s
17、ome 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 and/or on the ISO list of patent decla
18、rations 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 expressions related to conformity
19、 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 35, Paints and varnishes, Subcommittee
20、 SC 9, General test methods for paints and varnishes.A list of all parts in the ISO 19403 series can be found on the ISO website.iv ISO 2017 All rights reservedBS ISO 194037:2017ISO 19403-7:2017(E)ForewordISO (the International Organization for Standardization) is a worldwide federation of national
21、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
22、 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.The procedures used to develop this document and those intended for
23、 its further maintenance 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 .o
24、rg/ directives).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. Details of any patent rights identified during the development of the document will b
25、e in the Introduction and/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
26、 of ISO specific terms and 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 Techn
27、ical Committee ISO/TC 35, Paints and varnishes, Subcommittee SC 9, General test methods for paints and varnishes.A list of all parts in the ISO 19403 series can be found on the ISO website.iv ISO 2017 All rights reserved ISO 19403-7:2017(E)IntroductionDynamic contact angles describe the processes on
28、 the interface liquid/solid during volume increase (advancing angle) or volume decrease (receding angle) of a drop in horizontal position. As an alternative to the static method (see ISO 19403-2), for the advancing angle always a surface area is wetted, which was previously unwetted. For the recedin
29、g angle, the contact angle during dewetting is observed. From the difference between advancing angle and receding angle, information on chemical homogeneity and roughness can be concluded. The receding angle is not suitable for the determination of the surface energy. ISO 2017 All rights reserved vB
30、S ISO 194037:2017BS ISO 194037:2017Paints and varnishes Wettability Part 7: Measurement of the contact angle on a tilt stage (roll-off angle)1 ScopeThis document specifies a method for the dynamic measurement of the roll-off angle of a liquid drop on a solid surface. From the dynamic measurement, th
31、e advancing and receding angles of the drop rolling off can also be determined. The roll-off angle plays a role when evaluating, for example, easy-to-clean or anti-adherent surfaces.2 Normative referencesThe following documents are referred to in the text in such a way that some or all of their cont
32、ent constitutes requirements 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 4618, Paints and varnishes Terms and definitionsISO 19403-1, Paints and varnishes Wettabil
33、ity Part 1: Terminology and general principles3 Terms and definitionsFor the purposes of this document, the terms and definitions given in ISO 4618, ISO 19403-1 and the following apply.ISO and IEC maintain terminological databases for use in standardization at the following addresses: IEC Electroped
34、ia: available at h t t p :/ www .electropedia .org/ ISO Online browsing platform: available at h t t p :/ www .iso .org/ obp3.1roll-off anglestipping of the surface of the solid body, due to which a liquid drop put down onto this surface rolls off3.2advancing angleacontact angle, which is measured d
35、uring advancing of the three-phase pointNote 1 to entry: Generally, the advancing angle is used for the determination of the interface energy, in which case the measurement should be carried out close to the thermodynamic equilibrium. This is approximately reached if there is no influence of, for ex
36、ample, the dosing speed on the contact angle.SOURCE: ISO 19403-6:2017, 3. 2INTERNATIONAL STANDARD ISO 19403-7:2017(E) ISO 2017 All rights reserved 1BS ISO 194037:2017ISO 19403-7:2017(E)3.3receding anglercontact angle, which is measured during receding of the three-phase pointSOURCE: ISO 19403-6:2017
37、, 3. 34 PrincipleA drop is put down onto the surface to be tested. The surface is tipped with constant inclination speed until the drop rolls off. The advancing and receding angles are determined from the time curve of the left and right three-phase point.5 Apparatus and materialsOrdinary laboratory
38、 apparatus, together with the following.5.1 Contact angle measuring system.Any state-of-the-art contact angle measuring device fitted with a tilting device, preferably systems with digital image capture and analysis for measuring the contact angle. Figure 1 shows a schematic example of a contact ang
39、le measuring system for which only the sample table is inclined. Figure 2 shows a system for which the camera as well as the sample table are inclined.Key1 light source2 specimen holder3 graduated microsyringe4 optical system5 screenFigure 1 Schematic diagram of a contact angle measuring system for
40、which only the sample table is inclined2 ISO 2017 All rights reservedBS ISO 194037:2017ISO 19403-7:2017(E)3.3receding anglercontact angle, which is measured during receding of the three-phase pointSOURCE: ISO 19403-6:2017, 3. 34 PrincipleA drop is put down onto the surface to be tested. The surface
41、is tipped with constant inclination speed until the drop rolls off. The advancing and receding angles are determined from the time curve of the left and right three-phase point.5 Apparatus and materialsOrdinary laboratory apparatus, together with the following.5.1 Contact angle measuring system.Any
42、state-of-the-art contact angle measuring device fitted with a tilting device, preferably systems with digital image capture and analysis for measuring the contact angle. Figure 1 shows a schematic example of a contact angle measuring system for which only the sample table is inclined. Figure 2 shows
43、 a system for which the camera as well as the sample table are inclined.Key1 light source2 specimen holder3 graduated microsyringe4 optical system5 screenFigure 1 Schematic diagram of a contact angle measuring system for which only the sample table is inclined2 ISO 2017 All rights reserved ISO 19403
44、-7:2017(E)Key1 light source2 specimen holder3 graduated microsyringe4 optical system5 screenFigure 2 Schematic diagram of a contact angle measuring system for which the camera as well as the sample table are inclinedThe image capturing system should be oriented in a way that the drop is within the l
45、eft third of the image (when the table is inclined to the right).NOTE The device used can differ from the schematic diagram in regard to light path and the arrangement of the components.5.2 Dosing unit.Dosing unit, which makes it possible to precisely apply drops in the range of microlitres to the s
46、urface.5.3 Test liquids.If not otherwise agreed, use at least one of the test liquids suggested in Table 1. The test liquids shall have at least “purity grade” for analysis. Water shall have a surface tension of at least 71,5 mN/m.It is recommended to test the suitability of the liquids used in acco
47、rdance with ISO 19403-3 or EN 14370 prior to measuring their surface tensions. For guidance, the values from the literature for the surface tension, l, are indicated in Table 1. It is also possible to use an individually measured value of the surface tension as reference value. According to experien
48、ce, the measured value should not deviate more than 2 % from the value from the literature or the individually determined value.The test liquids shall not physically or chemically affect the surface. They may not show a notable yield value.NOTE 1 A notable yield value is shown when a lamella of the
49、liquid teared with a needle does not level within a given time limit (e.g. 30 s).The test liquids shall not cross-link, show any skinning or evaporate during the measurement. ISO 2017 All rights reserved 3BS ISO 194037:2017ISO 19403-7:2017(E)Liquids having a vapour pressure higher than water at 30 C shall be measured in the saturated vapour phase.The test liquids used should have a maximum of different polar and dispersive fractions of surface tension.NOTE 2 The values given
