{"id":41265,"date":"2020-08-25T10:18:00","date_gmt":"2020-08-25T08:18:00","guid":{"rendered":"https:\/\/fhi.nl\/nieuws\/oppervlaktespanning-van-kunstmatig-bloed-voor-het-beoordelen-van-medische-gezichtsmaskers\/"},"modified":"2024-07-10T14:10:02","modified_gmt":"2024-07-10T12:10:02","slug":"oppervlaktespanning-van-kunstmatig-bloed-voor-het-beoordelen-van-medische-gezichtsmaskers","status":"publish","type":"news","link":"https:\/\/fhi.nl\/en\/news\/oppervlaktespanning-van-kunstmatig-bloed-voor-het-beoordelen-van-medische-gezichtsmaskers\/","title":{"rendered":"Surface tension of artificial blood for assessing medical face masks"},"content":{"rendered":"<header id=\"header\" class=\"header header--low header--branch\">\n\n\t\n\t\t\t<div class=\"header__background header__background--graphic\"><\/div>\n\t\n\t<div class=\"container\">\n\t\t<div class=\"header__content\">\n\t\t\t<div class=\"header__first\">\n\n\t\t\t\t\n\t\t\t\t\n\t\t\t\t\n\t\t\t\t<h1 class=\"header__title\" >\n\t\t\t\t\tSurface tension of artificial blood for assessing medical face masks\t\t\t\t<\/h1>\n\n\t\t\t\t<div class=\"header__dots-line\">\n\t\t\t\t\t<svg width=\"431\" height=\"9\" viewbox=\"0 0 431 9\" fill=\"none\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"><path d=\"M430.799 4.192a1.136 1.136 0 1 1-2.272-.001 1.136 1.136 0 0 1 2.272 0Zm-27.272 0a1.135 1.135 0 1 1-2.27 0 1.135 1.135 0 0 1 2.27 0Zm-27.27 0a1.136 1.136 0 1 1-2.272-.001 1.136 1.136 0 0 1 2.272 0Zm-27.272 0a1.39 1.39 0 1 1-2.78 0 1.39 1.39 0 0 1 2.78 0Zm-27.78 0a1.645 1.645 0 1 1-3.29 0 1.645 1.645 0 0 1 3.29 0Zm-28.29 0a1.9 1.9 0 1 1-3.799 0 1.9 1.9 0 0 1 3.799 0Zm-28.799 0a2.154 2.154 0 1 1-4.308 0 2.154 2.154 0 0 1 4.308 0Zm-29.308 0a2.41 2.41 0 1 1-4.819 0 2.41 2.41 0 0 1 4.819 0Zm-29.819 0a2.663 2.663 0 1 1-5.326.001 2.663 2.663 0 0 1 5.326-.001Zm-30.327 0a2.919 2.919 0 1 1-5.837 0 2.919 2.919 0 0 1 5.837 0Zm-30.837 0a3.173 3.173 0 1 1-6.345.001 3.173 3.173 0 0 1 6.345 0Zm-31.346 0a3.428 3.428 0 1 1-6.856 0 3.428 3.428 0 0 1 6.856 0Zm-31.856 0a3.683 3.683 0 1 1-7.365 0 3.683 3.683 0 0 1 7.365 0Zm-32.365 0a3.937 3.937 0 1 1-7.875 0 3.937 3.937 0 0 1 7.875 0Zm-32.874 0a4.192 4.192 0 1 1-8.384 0 4.192 4.192 0 0 1 8.384 0Z\" fill=\"#FFF960\"\/><\/svg>\t\t\t\t<\/div>\n\n\t\t\t\t\n\t\t\t\t\n\t\t\t<\/div>\n\n\t\t\t\t\t\t\t<div class=\"header__second\">\n\n\t\t\t\t\t\n\t\t\t\t\t\n\t\t\t\t\t\n\t\t\t\t\t\t\t\t\t\t\t<div class=\"header__branch-logos\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<img decoding=\"async\" src=\"https:\/\/fhi.nl\/app\/uploads\/2024\/02\/Laboratorium-technologie.svg\" class=\"header__branch-logo\" alt=\"\" \/>\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t\n\t\t\t\t\t\n\t\t\t\t\t\n\t\t\t\t<\/div>\n\t\t\t\n\t\t<\/div>\n\t<\/div>\n<\/header>\n\n\t<div class=\"header__meta\">\n\t<div class=\"container\">\n\t\t<div class=\"header__meta__category\">\n\n\t\t\t\t\t\t\t<div class=\"header__meta__detail\">\n\t\t\t\t\t<div>Branch<\/div>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<a href=\"https:\/\/fhi.nl\/en\/kennishub\/?_branches_kennishub=laboratorium-technologie\" class=\"header__meta__detail--branch\">\n\t\t\t\t\t\t\t\tLaboratory Technology\t\t\t\t\t\t\t<\/a>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\n\t\t\t\n\t\t<\/div>\n\t<\/div>\n<\/div>\n\n<div class=\"text bg--white\">\n\t<div class=\"container\">\n\t\t\t\t\t\t\t\t\t\t\t<div class=\"text__content text__content--1-col\">\n\t\t\t<p><strong>Surface tension of artificial blood for assessing medical face masks<\/strong><br \/>Medical face masks are intended to resist liquid penetration from splashes or splatters of blood, body fluids and other potentially infectious materials. Many factors influence the wetting and penetration properties of body fluids. Consider surface tension, viscosity, polarity of the liquid, as well as the structure, properties of the material the mask is made of (hydrophilic or hydrophobic) and the design of the mask.<br \/><br \/>Blood-repellent surfaces (<a href=\"https:\/\/www.biolinscientific.com\/blog\/how-to-make-better-blood-repellent-surfaces\" target=\"_blank\" rel=\"noopener noreferrer\">Blood repellent surfaces<\/a>) can be made of different materials. However, to properly evaluate their performance, a fluid that resembles and\/or has blood-like properties is needed. The surface tension for blood and other body fluids (excluding saliva) ranges from 42 to 60 mN\/m. To simulate the wetting characteristics of blood and body fluids, the surface tension of the synthetic blood is adjusted to the lowest surface tension range. Hence, the surface tension of synthetic blood is 42 mN\/m with an accuracy of +\/- 2 mN\/m.<br \/><br \/>The main component of synthetic blood is water with a thickener and a red dye to assess visual detection\/inspection of penetration.\u00a0<br \/><br \/>By varying the droplet speed and drop height, the synthetic blood is sprayed onto the mask or mask material to assess its resistance to liquid penetration.<br \/><br \/><strong>Standards must be followed when evaluating protective materials.<\/strong><br \/><br \/>The <strong>ASTM F1670 standard <\/strong>describes the standard test method of how protective materials (clothing and face masks) can resist a certain penetration of synthetic blood. The method described in the standard is based on studies of blood-borne pathogens such as Hepatitis B and C, and HIV. These studies mainly took place in the last century (ca. 1980) when HIV infections were at their highest. A very important requirement within liquid penetration tests (<strong>ASTM F1670<\/strong>) is that the surface tension of the synthetic blood is measured according to the <strong>ASTM D133<\/strong>1 standard.<br \/><br \/>The <strong>ASTM D1331<\/strong>-standard describes the surface tension measurement to be performed with a so-called \u201cForce Tensiometer\u201d (balance tensiometer) and the du No\u00fcy-Ring method. The <strong>ASTM D1331<\/strong> particularly emphasizes the importance of cleanliness when performing Surface Tension measurements. At least two measurements should be taken to ensure repeatability of the measurement. The videos below shows the <a href=\"https:\/\/www.biolinscientific.com\/blog\/surface-tension-of-artificial-blood-for-medical-face-mask-evaluation?wvideo=ony5bexf5x\" target=\"_blank\" rel=\"noopener noreferrer\">Du No\u00fcy ring<\/a> surface tension measurement in practice.\u00a0<\/p>\r\n<p>For more information: <a href=\"https:\/\/www.technex.nl\/blog\/oppervlaktespanning-van-kunstmatig-bloed-voor-het-beoordelen-van-medische-gezichtsmaskers\/1\">Technex in Wormerveer<\/a><br \/><br \/>Source: <a href=\"https:\/\/www.biolinscientific.com\/blog\/surface-tension-of-artificial-blood-for-medical-face-mask-evaluation\">Biolin Scientific<\/a><br \/>Susanna Lauren<br \/>Susanna is an Application Scientist at Biolin Scientific. In her PhD thesis, she developed fabrication methods for a new type of inorganic-organic polymers. Microfabricated polymer chips were utilized as a tool for biomolecule separation in analytical chemistry.<\/p>\t\t<\/div>\n\t<\/div>\n<\/div>\r\n\t<div class=\"articles bg--offwhite automatic\">\r\n\t\t<div class=\"container\">\r\n\t\t\t<div class=\"articles__header\">\r\n\t\t\t\t\t\t\t\t\t<div class='heading-wrapper'><svg width=\"13\" height=\"13\" viewbox=\"0 0 13 13\" fill=\"none\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"><circle cx=\"6.394\" cy=\"6.5\" r=\"6.394\" fill=\"#000\"\/><\/svg><h2>Related articles<\/h2><\/div>\t\t\t\t\t\t\t\t\t\t\t\t\t<a href=\"\/en\/profiel\/technex-bv\/\" class=\"button button--outline\">view profile<\/a>\r\n\t\t\t\t\t\t\t<\/div>\r\n\t\t\t\t\t\t<div class=\"post-grid post-grid--no-padding\">\r\n\t\t\t\t\n<a class=\"single-item single-item__articles\" href=\"https:\/\/fhi.nl\/en\/news\/vaisala-launches-dmt153-dew-point-transmitter-for-ultra-dry-processes\/\" data-id=\"87334\">\n\t<div class=\"single-item__articles-icon\">\n\t\t<svg width=\"35\" 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stroke=\"#2A5CEE\" stroke-width=\"2\" stroke-miterlimit=\"10\"\/>\n<\/g>\n<\/svg>\n\t<\/div>\n\t<div class=\"single-item__articles-title\"><div class='heading-wrapper'><h3>Vaisala launches DMT153 dew point transmitter for ultra-dry processes<\/h3><\/div><\/div>\n\t<div class=\"single-item__articles-terms\">\n\t\t\n\t\t\n\t\t\t\t\t\t<span class=\"button button--outline single-item__articles-term--branche single-item__articles-term\">World of Industry, Technology &amp; Science<\/span>\n\t\t\t\t\t\t\t\t<span class=\"button button--outline single-item__articles-term--branche single-item__articles-term\">Industrial automation<\/span>\n\t\t\t\t\t\t\t\t<span class=\"button button--outline single-item__articles-term--branche single-item__articles-term\">Hardware for automation<\/span>\n\t\t\t\t\t\t\t\t<span class=\"button button--outline single-item__articles-term--branche single-item__articles-term\">Automation<\/span>\n\t\t\t\t\t<\/div>\n\t<div class=\"single-item__articles-author-date-wrapper\">\n\t\t\t\t\t<div class=\"single-item__articles-author\">\n\t\t\t\tVaisala\t\t\t<\/div>\n\t\t\t\t\t\t\t<div class=\"single-item__articles-date\">\n\t\t\t\t28 August 2026\t\t\t<\/div>\n\t\t\t<\/div>\n<\/a>\n\n<a class=\"single-item single-item__articles\" href=\"https:\/\/fhi.nl\/en\/news\/terugblik-fhi-ledenbijeenkomst-cra\/\" data-id=\"68388\">\n\t<div class=\"single-item__articles-icon\">\n\t\t<svg width=\"35\" height=\"35\" viewbox=\"0 0 35 35\" fill=\"none\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\">\n<mask id=\"mask0_1182_5532\" style=\"mask-type:luminance\" maskunits=\"userSpaceOnUse\" x=\"0\" y=\"0\" width=\"35\" height=\"35\">\n<path d=\"M0 0H35V35H0V0Z\" fill=\"white\"\/>\n<\/mask>\n<g mask=\"url(#mask0_1182_5532)\">\n<path d=\"M5.12695 9.22852H1.02539V31.9238H10.4299C12.2868 31.9238 14.0678 32.6615 15.3809 33.9746H19.6191C20.9322 32.6615 22.7132 31.9238 24.5701 31.9238H33.9746V11.2793H29.873\" stroke=\"#2A5CEE\" stroke-width=\"2\" stroke-miterlimit=\"10\"\/>\n<path d=\"M17.5 9.22852H18.1426C20.0088 7.89544 22.2237 7.17773 24.5615 7.17773H29.873V27.8223H24.5615C22.2237 27.8223 20.0088 28.54 18.1426 29.873H16.8574C14.9912 28.54 12.7763 27.8223 10.4385 27.8223H5.12695V5.12695H9.22852\" stroke=\"#2A5CEE\" stroke-width=\"2\" stroke-miterlimit=\"10\"\/>\n<path d=\"M9.22852 1.02539V21.6699C13.759 21.6699 17.5 25.3425 17.5 29.873V9.22852C17.5 4.698 13.759 1.02539 9.22852 1.02539Z\" stroke=\"#2A5CEE\" stroke-width=\"2\" stroke-miterlimit=\"10\"\/>\n<\/g>\n<\/svg>\n\t<\/div>\n\t<div class=\"single-item__articles-title\"><div class='heading-wrapper'><h3>Review of the FHI members meeting CRA<\/h3><\/div><\/div>\n\t<div class=\"single-item__articles-terms\">\n\t\t\n\t\t\n\t\t\t\t\t\t<span class=\"button button--outline single-item__articles-term--branche single-item__articles-term\">FHI Members Meeting<\/span>\n\t\t\t\t\t<\/div>\n\t<div class=\"single-item__articles-author-date-wrapper\">\n\t\t\t\t\t<div class=\"single-item__articles-author\">\n\t\t\t\tFHI\t\t\t<\/div>\n\t\t\t\t\t\t\t<div class=\"single-item__articles-date\">\n\t\t\t\t2 June 2025\t\t\t<\/div>\n\t\t\t<\/div>\n<\/a>\n\n<a class=\"single-item single-item__articles\" href=\"https:\/\/fhi.nl\/en\/news\/opleiding-lead-engineer-gebouw-automatisering-gebouw-automatisering-en-beheer\/\" data-id=\"40239\">\n\t<div class=\"single-item__articles-icon\">\n\t\t<svg width=\"108\" height=\"97\" viewbox=\"0 0 108 97\" fill=\"none\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\">\n<path fill-rule=\"evenodd\" clip-rule=\"evenodd\" d=\"M71.1889 19.4317C71.1889 18.8156 70.905 18.2339 70.4193 17.8549C69.9336 17.4759 69.3003 17.3419 68.7027 17.4917L39.0059 24.935C38.1162 25.1581 37.4922 25.9577 37.4922 26.875V37.3931H29.2051C28.1005 37.3931 27.2051 38.2885 27.2051 39.3931V75.9996H31.2051V41.3931H47.895V75.9996H51.895V39.3931C51.895 38.2885 50.9996 37.3931 49.895 37.3931H41.4922V28.4356L67.1889 21.9948V75.9998H71.1889V34.3866H77.4785V75.9995H81.4785V32.3866C81.4785 31.282 80.5831 30.3866 79.4785 30.3866H71.1889V19.4317ZM37.5508 51.9436C37.5508 53.0482 38.4462 53.9436 39.5508 53.9436C40.6554 53.9436 41.5508 53.0482 41.5508 51.9436V48.7891C41.5508 47.6845 40.6554 46.7891 39.5508 46.7891C38.4462 46.7891 37.5508 47.6845 37.5508 48.7891V51.9436ZM39.5508 67.01C38.4462 67.01 37.5508 66.1146 37.5508 65.01V61.8555C37.5508 60.7509 38.4462 59.8555 39.5508 59.8555C40.6554 59.8555 41.5508 60.7509 41.5508 61.8555V65.01C41.5508 66.1146 40.6554 67.01 39.5508 67.01ZM56.7871 51.9436C56.7871 53.0482 57.6825 53.9436 58.7871 53.9436C59.8917 53.9436 60.7871 53.0482 60.7871 51.9436V48.7891C60.7871 47.6845 59.8917 46.7891 58.7871 46.7891C57.6825 46.7891 56.7871 47.6845 56.7871 48.7891V51.9436ZM58.7871 35.5164C57.6825 35.5164 56.7871 34.6209 56.7871 33.5164V30.3618C56.7871 29.2572 57.6825 28.3618 58.7871 28.3618C59.8917 28.3618 60.7871 29.2572 60.7871 30.3618V33.5164C60.7871 34.6209 59.8917 35.5164 58.7871 35.5164ZM56.7871 65.01C56.7871 66.1146 57.6825 67.01 58.7871 67.01C59.8917 67.01 60.7871 66.1146 60.7871 65.01V61.8555C60.7871 60.7509 59.8917 59.8555 58.7871 59.8555C57.6825 59.8555 56.7871 60.7509 56.7871 61.8555V65.01Z\" fill=\"#B14AED\"\/>\n<path fill-rule=\"evenodd\" clip-rule=\"evenodd\" d=\"M96.9545 4H11C7.13401 4 4 7.13401 4 11V66.7273C4 70.5933 7.134 73.7273 11 73.7273H96.9545C100.821 73.7273 103.955 70.5933 103.955 66.7273V11C103.955 7.134 100.821 4 96.9545 4ZM11 0C4.92487 0 0 4.92486 0 11V66.7273C0 72.8024 4.92486 77.7273 11 77.7273H96.9545C103.03 77.7273 107.955 72.8024 107.955 66.7273V11C107.955 4.92487 103.03 0 96.9545 0H11Z\" fill=\"#B14AED\"\/>\n<path fill-rule=\"evenodd\" clip-rule=\"evenodd\" d=\"M38 74H69V97H38V74ZM42 78V93H65V78H42Z\" fill=\"#B14AED\"\/>\n<path fill-rule=\"evenodd\" clip-rule=\"evenodd\" d=\"M23.9082 95C23.9082 93.8954 24.8036 93 25.9082 93L82.0446 93C83.1491 93 84.0446 93.8954 84.0446 95C84.0446 96.1046 83.1491 97 82.0446 97L25.9082 97C24.8036 97 23.9082 96.1046 23.9082 95Z\" fill=\"#B14AED\"\/>\n<\/svg>\n\t<\/div>\n\t<div class=\"single-item__articles-title\"><div class='heading-wrapper'><h3>Training Lead Engineer Building Automation Building Automation and Management<\/h3><\/div><\/div>\n\t<div class=\"single-item__articles-terms\">\n\t\t\n\t\t\n\t\t\t\t\t\t<span class=\"button button--outline single-item__articles-term--branche single-item__articles-term\">Building Automation<\/span>\n\t\t\t\t\t\t\t\t<span class=\"button button--outline single-item__articles-term--branche single-item__articles-term\">Digital Building of the Future<\/span>\n\t\t\t\t\t\t\t\t<span class=\"button button--outline single-item__articles-term--branche single-item__articles-term\">Industrial automation<\/span>\n\t\t\t\t\t\t\t\t<span class=\"button button--outline single-item__articles-term--branche single-item__articles-term\">Banking and insurance industry<\/span>\n\t\t\t\t\t<\/div>\n\t<div class=\"single-item__articles-author-date-wrapper\">\n\t\t\t\t\t<div class=\"single-item__articles-author\">\n\t\t\t\tFHI, Federation of Technology Industries\t\t\t<\/div>\n\t\t\t\t\t\t\t<div class=\"single-item__articles-date\">\n\t\t\t\tJanuary 7, 2021\t\t\t<\/div>\n\t\t\t<\/div>\n<\/a>\n\t\t\t<\/div>\r\n\t\t<\/div>\r\n\t<\/div>","protected":false},"excerpt":{"rendered":"","protected":false},"featured_media":41266,"template":"","branches":[14],"events":[366],"secretariat":[42],"categories":[],"themes_tax":[],"content_types":[514],"class_list":["post-41265","news","type-news","status-publish","has-post-thumbnail","hentry"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v28.5 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Oppervlaktespanning van kunstmatig bloed voor het beoordelen van medische gezichtsmaskers - FHI, federatie van technologiebranches<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, 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