{"id":9506,"date":"2026-01-28T06:06:15","date_gmt":"2026-01-28T06:06:15","guid":{"rendered":"https:\/\/changhongchemical.com\/?p=9506"},"modified":"2026-04-27T11:16:12","modified_gmt":"2026-04-27T11:16:12","slug":"9506-2","status":"publish","type":"post","link":"https:\/\/changhongchemical.com\/nl\/9506-2\/","title":{"rendered":"De \"ziel\" van fotocurabele materialen: Fotoinitiatoren"},"content":{"rendered":"<h1><strong><b>De \"ziel\" van fotocurabele materialen: Fotoinitiatoren<\/b><\/strong><\/h1>\n<p>In de wereld van fotocurabele materialen is er een ingredi\u00ebnt dat, hoewel het slechts 2%-5% van de formule uitmaakt, fungeert als een \"sleutel\" in chemische reacties die het succes of falen van het hele uithardingsproces bepaalt: de fotoinitiator. Als de kern van de fotuithardingstechnologie zetten fotoinitiatoren snel polymerisatiereacties in gang na het absorberen van lichtenergie, waardoor vloeibare harsen binnen enkele seconden worden omgezet in vaste materialen. Ze worden op grote schaal gebruikt in inkten, coatings, kleefstoffen, 3D printen en andere gebieden. In de volgende informatie worden de basisconcepten, soorten, kenmerken en ontwikkelingstrends systematisch besproken, zodat u een beter inzicht krijgt in de \"grote wijsheid\" achter deze \"kleine speler\".<\/p>\n<p><img decoding=\"async\" class=\"size-full wp-image-9507\" src=\"https:\/\/changhongchemical.com\/wp-content\/uploads\/2026\/01\/Photoinitiator.webp\" alt=\"Fotoinitiator\" width=\"3462\" height=\"1198\" srcset=\"https:\/\/changhongchemical.com\/wp-content\/uploads\/2026\/01\/Photoinitiator.webp 3462w, https:\/\/changhongchemical.com\/wp-content\/uploads\/2026\/01\/Photoinitiator-768x266.webp 768w, https:\/\/changhongchemical.com\/wp-content\/uploads\/2026\/01\/Photoinitiator-1536x532.webp 1536w, https:\/\/changhongchemical.com\/wp-content\/uploads\/2026\/01\/Photoinitiator-2048x709.webp 2048w, https:\/\/changhongchemical.com\/wp-content\/uploads\/2026\/01\/Photoinitiator-18x6.webp 18w, https:\/\/changhongchemical.com\/wp-content\/uploads\/2026\/01\/Photoinitiator-1280x443.webp 1280w, https:\/\/changhongchemical.com\/wp-content\/uploads\/2026\/01\/Photoinitiator-600x208.webp 600w\" sizes=\"(max-width: 3462px) 100vw, 3462px\" \/><\/p>\n<h3><strong style=\"color: #222222;\"><b>I.Conceptuele analyse: Wat zijn fotoinitiatoren?<\/b><\/strong><\/h3>\n<p>Fotoinitiatoren, ook bekend als fotosensibilisatoren of fotocureermiddelen, zijn stoffen die onder lichtbestraling energie absorberen bij specifieke golflengten, waardoor een aangeslagen toestand ontstaat en vervolgens actieve vrije radicalen of kationen worden gegenereerd, waardoor de polymerisatie- en verknopingsreacties van monomeren of oligomeren in gang worden gezet.<\/p>\n<p><strong><b>Hun werkingsmechanisme kan als volgt worden samengevat:<\/b><\/strong><\/p>\n<p>Ze absorberen fotonenergie in het ultraviolette (250-420 nm) of zichtbare licht (400-800 nm) gebied, waarbij ze overgaan in een aangeslagen toestand.  Vervolgens genereren ze actieve vrije radicalen door homolytische splitsing van chemische bindingen (splitsingstype) of waterstofabsorptiereacties (waterstofabsorptietype), of initi\u00ebren ze kationische polymerisatie door sterke protonzuren te genereren, wat uiteindelijk het uitharden en vormen van het systeem bevordert.<\/p>\n<h3><b><\/b><strong><b>II. Classificatie van fotoinitiatoren<\/b><\/strong><\/h3>\n<p><strong><b>(1) Indeling naar fotolysemechanisme<\/b><\/strong><\/p>\n<h4><strong>1. Klieftype vrije radicale fotoinitiatoren<\/strong><\/h4>\n<p>Na het absorberen van lichtenergie gaat de molecule over naar een aangeslagen toestand en de zwakke bindingen in de structuur ondergaan een homolytische splitsing, waarbij direct actieve vrije radicalen worden gegenereerd.<\/p>\n<p><strong><b>Typische voorbeelden:<\/b><\/strong><\/p>\n<ul>\n<li>Benzo\u00eb en derivaten (bijv. benzo\u00eb-ethers)<\/li>\n<li>\u03b1-hydroxyketone derivatives (e.g., <a href=\"https:\/\/changhongchemical.com\/product\/irgacure-1173-cas-7473-98-5\/\">1173<\/a>, 184, 2959)<\/li>\n<li>\u03b1-aminoalkylacetofenonen (bijvoorbeeld 907, 369)<\/li>\n<li>Acylfosfineoxiden (bijv. TPO, 819)<img decoding=\"async\" class=\"size-full wp-image-9508\" src=\"https:\/\/changhongchemical.com\/wp-content\/uploads\/2026\/01\/Photoinitiator-1173.webp\" alt=\"Fotoinitiator 1173\" width=\"3462\" height=\"1351\" srcset=\"https:\/\/changhongchemical.com\/wp-content\/uploads\/2026\/01\/Photoinitiator-1173.webp 3462w, https:\/\/changhongchemical.com\/wp-content\/uploads\/2026\/01\/Photoinitiator-1173-768x300.webp 768w, https:\/\/changhongchemical.com\/wp-content\/uploads\/2026\/01\/Photoinitiator-1173-1536x599.webp 1536w, https:\/\/changhongchemical.com\/wp-content\/uploads\/2026\/01\/Photoinitiator-1173-2048x799.webp 2048w, https:\/\/changhongchemical.com\/wp-content\/uploads\/2026\/01\/Photoinitiator-1173-18x7.webp 18w, https:\/\/changhongchemical.com\/wp-content\/uploads\/2026\/01\/Photoinitiator-1173-1280x500.webp 1280w, https:\/\/changhongchemical.com\/wp-content\/uploads\/2026\/01\/Photoinitiator-1173-600x234.webp 600w\" sizes=\"(max-width: 3462px) 100vw, 3462px\" \/><br \/>\n<h4><\/h4>\n<p><strong>2.Waterstof<b> Abstractie-type vrije radicale fotoinitiatoren<\/b><\/strong><\/li>\n<\/ul>\n<p>De fotoinitiator in aangeslagen toestand onttrekt een waterstofatoom aan een waterstofatoomdonor (zoals een monomeer of prepolymeer), waardoor het een actieve vrije radicaal wordt.<\/p>\n<p><strong><b>Typische voorbeelden:<\/b><\/strong><\/p>\n<ul>\n<li><a href=\"https:\/\/changhongchemical.com\/product\/photoinitiator-bp-cas-119-61-9\/\">Benzofenon<\/a> and its derivatives<\/li>\n<li>Thioxanthonderivaten (bijv. ITX, DETX)<\/li>\n<li>Antrachinonderivaten (bijvoorbeeld 2-ethylantrachinon)<\/li>\n<\/ul>\n<ol start=\"3\">\n<li>\n<h4><strong><b>Kationische fotoinitiatoren<\/b><\/strong><\/h4>\n<\/li>\n<\/ol>\n<p>Na bestraling produceren ze supersterke protonzuren (Br\u00f8nsted- of Lewiszuren) die de kationische polymerisatie van monomeren zoals epoxiden en vinylethers in gang zetten.<\/p>\n<p><strong><b>Typische voorbeelden:<\/b><\/strong><\/p>\n<ul>\n<li>Jodoniumzouten, sulfoniumzouten, ijzerareenzouten, enz.<\/li>\n<li>Kenmerken: Kleine uithardingskrimp, sterke hechting en niet geremd door zuurstof.<\/li>\n<\/ul>\n<p><strong><b>(2) Classificatie op basis van structurele kenmerken<\/b><\/strong><\/p>\n<table>\n<tbody>\n<tr>\n<td>Categorie<\/td>\n<td width=\"162\">Typische voorbeelden<\/td>\n<td width=\"117\">Absorptiegolflengte (nm)<\/td>\n<td>Kenmerken en toepassingen<\/td>\n<\/tr>\n<tr>\n<td><strong><b>Benzo\u00ebderivaten<\/b><\/strong><\/td>\n<td width=\"162\">Benzo\u00eb, benzo\u00eb-ether<\/td>\n<td width=\"117\">300~400<\/td>\n<td>Het is goedkoop, maar heeft een slechte thermische stabiliteit en is gevoelig voor vergeling.<\/td>\n<\/tr>\n<tr>\n<td><strong><b>Benzo\u00ebderivaten<\/b><\/strong><\/td>\n<td width=\"162\">BDK (\u03b1,\u03b1'-dimethylbenzo\u00eblacetaal)<\/td>\n<td width=\"117\">254, 337-\u00a0390<\/td>\n<td>Het vertoont een hoge reactiviteit maar is gevoelig voor vergeling (de fotodegradatieproducten bevatten kinonachtige structuren)<\/td>\n<\/tr>\n<tr>\n<td><strong><b>Acetofenon derivaten<\/b><\/strong><\/td>\n<td width=\"162\">DEAP<\/td>\n<td width=\"117\">242, 325<\/td>\n<td>Het biedt een hoge effici\u00ebntie, maar heeft een slechte thermische stabiliteit en is relatief duur<\/td>\n<\/tr>\n<tr>\n<td><strong><b>\u03b1-hydroxy ketonen<\/b><\/strong><\/td>\n<td width=\"162\">1173, 184, 2959<\/td>\n<td width=\"117\">245~333<\/td>\n<td>Het heeft een goede thermische stabiliteit en weerstand tegen vergeling en wordt veel gebruikt in aflakken, houtcoatings, enz.<\/td>\n<\/tr>\n<tr>\n<td><strong><b>\u03b1-aminoketonen<\/b><\/strong><\/td>\n<td width=\"162\">907, 369<\/td>\n<td width=\"117\">230~324<\/td>\n<td>Hoge activiteit, geschikt voor gekleurde systemen; sommige vari\u00ebteiten hebben beperkingen door vergeling of toxiciteit<\/td>\n<\/tr>\n<tr>\n<td><strong><b>Thioxanthonen<\/b><\/strong><\/td>\n<td width=\"162\">ITX, DETX<\/td>\n<td width=\"117\">257~430<\/td>\n<td>Absorptie over lange golflengte, vaak gebruikt voor het uitharden van dikke lagen of gekleurde systemen<\/td>\n<\/tr>\n<tr>\n<td><strong><b>Antrachinonen<\/b><\/strong><\/td>\n<td width=\"162\">2-ethylantrachinon<\/td>\n<td width=\"117\">256~430<\/td>\n<td>Het is ongevoelig voor zuurstofinhibitie en wordt vaak gebruikt in soldeermaskerinkten.<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<h3><strong><b>III. Kenmerken en selectieprincipes van fotoinitiatoren<\/b><\/strong><\/h3>\n<h4><strong><b>(1) Selectieprincipes<\/b><\/strong><\/h4>\n<ul>\n<li><strong><b> Spectrale afstemming:<\/b><\/strong>Het absorptiespectrum van de initiator moet overlappen met het emissiespectrum van de lichtbron en een hoge molaire extinctieco\u00ebffici\u00ebnt hebben.<\/li>\n<li><strong><b> Hoog rendement en zuinigheid: <\/b><\/strong>Goede oplosbaarheid, hoge reactiviteit en lage dosering.<\/li>\n<li><strong><b> Stabiliteit:<\/b><\/strong>Stabiel tijdens opslag en breekt niet af beneden 85\u00b0C.<\/li>\n<li><strong><b> Systeemcompatibiliteit: <\/b><\/strong>Selecteer een initiator met de juiste activiteit op basis van het type prepolymeer\/monomeer.<\/li>\n<li><strong><b> Gecombineerd gebruik: <\/b><\/strong>Meerdere initiators in combinatie gebruiken om het absorptiegolflengtebereik te verbreden en de uithardingssnelheid en -diepte te verbeteren.<\/li>\n<li><strong><b> Milieuvriendelijkheid en veiligheid: <\/b><\/strong>Weinig geur, weinig giftig en milieuvriendelijk.<\/li>\n<li><strong><b> Beheersbare kosten: <\/b><\/strong>Eenvoudig syntheseproces en gemakkelijk verkrijgbare grondstoffen.<\/li>\n<\/ul>\n<h4><strong><b>(2) Nieuwe ontwikkelingstrends<\/b><\/strong><\/h4>\n<ul>\n<li><strong><b> Hybride systemen:<\/b><\/strong>Combineert vrije radicale en kationische fotoinitiatoren en biedt de voordelen van snelle uitharding, lage krimp en hoge hechting.<\/li>\n<li><strong><b> Zichtbaar licht fotoinitiatoren:<\/b><\/strong>Zoals titanoceenverbindingen (Irgacure 784), met absorptiegolflengten tot 500 nm, geschikt voor uithardingssystemen met zichtbaar licht.<\/li>\n<li><strong><b> Fotoinitiatoren op waterbasis: <\/b><\/strong>Introductie van hydrofiele groepen (zoals sulfonaten) om de watercompatibiliteit te verbeteren, geschikt voor milieuvriendelijke coatings op waterbasis.<\/li>\n<li><strong><b> Macromoleculaire fotoinitiatoren: <\/b><\/strong>Fotoinitiatoren opnemen in polymeerketens om de compatibiliteit te verbeteren en migratie en geur te verminderen.<\/li>\n<li><strong><b> Dubbele uithardingssystemen:<\/b><\/strong>Fotocuring combineren met thermische uitharding, uitharding door vocht, enz. om het probleem van uitharding in schaduwrijke gebieden op te lossen en de prestaties van het materiaal te verbeteren.<\/li>\n<\/ul>\n<h3><strong><b>Conclusie: Kleine onderdelen voor een grote toekomst<\/b><\/strong><\/h3>\n<p>Hoewel fotoinitiatoren slechts een klein percentage van de formulering uitmaken, zijn ze van cruciaal belang voor een effici\u00ebnte en precieze uitharding van fotocurabele materialen. Door de toenemende milieueisen en de uitbreiding van toepassingsscenario's ontwikkelen fotoinitiatoren zich voortdurend in de richting van hogere effici\u00ebntie, grotere veiligheid, bredere toepasbaarheid en verbeterde milieuvriendelijkheid. Van ultraviolet tot zichtbaar licht, van systemen op oliebasis tot systemen op waterbasis en van enkelvoudige tot dubbele uithardingsmechanismen: elke doorbraak in deze technologie geeft nieuwe vitaliteit aan gebieden zoals groene productie, intelligente coatings en 3D-printen. In de toekomst zullen fotoinitiatoren een centrale rol blijven spelen in het stimuleren van fotocurabele technologie naar nog bredere toepassingen.<\/p>\n<p>&nbsp;<\/p>\n<p>&nbsp;<\/p>","protected":false},"excerpt":{"rendered":"<p>In the world of photocurable materials, there is an ingredient that, although only accounting for 2%-5% of the formula, acts like a &#8220;key&#8221; in chemical reactions, determining the success or failure of the entire&#8230;<\/p>","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[185],"tags":[],"class_list":["post-9506","post","type-post","status-publish","format-standard","hentry","category-photoinitiator"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.4 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>The &quot;Soul&quot; of Photocurable Materials: Photoinitiators- Changhong Chemical<\/title>\n<meta name=\"description\" content=\"Discover the essential role of photoinitiators\u2014the key to photocurable materials. 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