Ahoj lidi, pokud v\u00e1s n\u011bkdy zaj\u00edmalo, pro\u010d se v\u00e1\u0161 zahradn\u00ed post\u0159ik dr\u017e\u00ed na listech, m\u00edsto aby se od nich odr\u00e1\u017eel, nebo jak pr\u016fmyslov\u00e9 \u010distic\u00ed prost\u0159edky proch\u00e1zej\u00ed mastnotou jako hork\u00fd n\u016f\u017e m\u00e1slem, pr\u00e1v\u011b se d\u00edv\u00e1te na kouzlo sm\u00e1\u010dedel. Jako \u010dlov\u011bk, kter\u00fd se ji\u017e v\u00edce ne\u017e 25 let zab\u00fdv\u00e1 chemi\u00ed povrchov\u011b aktivn\u00edch l\u00e1tek a vytv\u00e1\u0159\u00ed sm\u00e1\u010dedla pro v\u0161e od zem\u011bd\u011blsk\u00e9 chemie a\u017e po v\u00fdrobn\u00ed linky, jsem vid\u011bl, jak tito neop\u011bvovan\u00ed hrdinov\u00e9 m\u011bn\u00ed slo\u017eit\u00e9 procesy v hladk\u00e9 plachty. Nejsou nejkr\u00e1sn\u011bj\u0161\u00ed sou\u010d\u00e1st\u00ed chemick\u00e9ho sv\u011bta, ale bez nich by mnoho pr\u016fmyslov\u00fdch odv\u011btv\u00ed z\u016fstalo u neefektivn\u00edch a neekonomick\u00fdch metod. V tomto \u010dl\u00e1nku rozeberu, co jsou sm\u00e1\u010dedla, jak funguj\u00ed, jak\u00e9 existuj\u00ed r\u016fzn\u00e9 typy, re\u00e1ln\u00e9 aplikace, n\u011bkolik tip\u016f z praxe a kam podle m\u011b tato technologie sm\u011b\u0159uje. Z\u016fsta\u0148te s n\u00e1mi, pokud v\u00e1s zaj\u00edm\u00e1, jak p\u0159im\u011bt kapaliny, aby pro v\u00e1s pracovaly l\u00e9pe.<\/p>\n
Nejprve si ujasn\u011bme z\u00e1kladn\u00ed pojmy. sm\u00e1\u010dedlo je v podstat\u011b povrchov\u011b aktivn\u00ed l\u00e1tka - povrchov\u011b aktivn\u00ed l\u00e1tka, kter\u00e1 sni\u017euje povrchov\u00e9 nap\u011bt\u00ed mezi kapalinou a pevnou l\u00e1tkou. P\u0159edstavte si, jak voda st\u00e9k\u00e1 na voskovanou kapotu auta; to je vysok\u00e9 povrchov\u00e9 nap\u011bt\u00ed, kdy se kapalina stahuje do kapek, m\u00edsto aby se rozl\u00e9vala. Kdy\u017e p\u0159id\u00e1te sm\u00e1\u010dedlo, nap\u011bt\u00ed se sn\u00ed\u017e\u00ed a voda se zplo\u0161t\u00ed a pokryje v\u011bt\u0161\u00ed plochu. Z chemick\u00e9ho hlediska maj\u00ed tato \u010dinidla hydrofiln\u00ed (vodu miluj\u00edc\u00ed) hlavu a hydrofobn\u00ed (vody se boj\u00edc\u00ed) ocas, co\u017e jim umo\u017e\u0148uje p\u0159eklenout rozd\u00edl mezi pol\u00e1rn\u00edmi kapalinami, jako je voda, a nepol\u00e1rn\u00edmi povrchy, jako jsou oleje nebo plasty. V m\u00fdch za\u010d\u00e1tc\u00edch v laborato\u0159i jsem to demonstroval tak, \u017ee jsem do misky s vodou vhodil trochu m\u00fddla na n\u00e1dob\u00ed s pep\u0159ov\u00fdmi vlo\u010dkami - pep\u0159 se rozpt\u00fdlil, kdy\u017e se nap\u011bt\u00ed poru\u0161ilo. Je to jednoduch\u00e9, ale ukazuje to princip.<\/p>\n
Jak funguj\u00ed v praxi? Z\u00e1le\u017e\u00ed na kontaktn\u00edm \u00fahlu. Bez sm\u00e1\u010dedla m\u016f\u017ee b\u00fdt \u00fahel mezi kapkou kapaliny a povrchem v\u011bt\u0161\u00ed ne\u017e 90 stup\u0148\u016f, co\u017e znamen\u00e1 \u0161patn\u00e9 sm\u00e1\u010den\u00ed. Pokud \u00fahel klesne pod 30 stup\u0148\u016f, z\u00edsk\u00e1te superm\u00e1\u010den\u00ed, kdy se kapalina rychle a \u0159\u00eddce rozt\u00edr\u00e1. To m\u00e1 z\u00e1sadn\u00ed v\u00fdznam ve sc\u00e9n\u00e1\u0159\u00edch, kde z\u00e1le\u017e\u00ed na penetraci, jako je nas\u00e1knut\u00ed do p\u016fdy nebo tkanin. Z toho, co jsem vyzkou\u0161el, vypl\u00fdv\u00e1, \u017ee \u00fa\u010dinnost z\u00e1vis\u00ed na koncentraci - p\u0159\u00edli\u0161 mal\u00e1, a budete m\u00edt skvrnit\u00e9 pokryt\u00ed; p\u0159\u00edli\u0161 velk\u00e1, a m\u016f\u017ee se vytvo\u0159it p\u011bna nebo zbytky. pH a teplota tak\u00e9 hraj\u00ed roli; n\u011bkter\u00e9 prost\u0159edky vyniknou v kysel\u00fdch podm\u00ednk\u00e1ch, jin\u00e9 v z\u00e1sadit\u00fdch.<\/p>\n
Existuje n\u011bkolik hlavn\u00edch typ\u016f, se kter\u00fdmi se pravideln\u011b setk\u00e1v\u00e1m. Neiontov\u00e1 sm\u00e1\u010dedla, jako jsou ethoxyl\u00e1ty alkoholu, jsou univerz\u00e1ln\u00ed a stabiln\u00ed v r\u016fzn\u00fdch rozmez\u00edch pH, tak\u017ee se skv\u011ble hod\u00ed pro v\u0161eobecn\u00e9 pou\u017eit\u00ed. Jsou jemn\u00e1, m\u00e1lo p\u011bn\u00edc\u00ed a biologicky odbourateln\u00e1, a proto jsou obl\u00edben\u00e1 v ekologick\u00fdch p\u0159\u00edpravc\u00edch. Anionov\u00e9, jako je laurylsulf\u00e1t sodn\u00fd, jsou vhodn\u00e9 pro n\u00e1ro\u010dn\u00e9 \u010di\u0161t\u011bn\u00ed, ale mohou b\u00fdt drsn\u011bj\u0161\u00ed pro poko\u017eku nebo \u017eivotn\u00ed prost\u0159ed\u00ed. Kationtov\u00e9 l\u00e1tky s kladn\u00fdm n\u00e1bojem vynikaj\u00ed v antistatick\u00fdch aplikac\u00edch, jako jsou zm\u011bk\u010dovadla textili\u00ed. D\u00e1le existuj\u00ed amfotern\u00ed typy, kter\u00e9 m\u011bn\u00ed sv\u00e9 chov\u00e1n\u00ed v z\u00e1vislosti na pH - vhodn\u00e9 pro prom\u011bnliv\u00e9 podm\u00ednky. Ve sv\u00fdch formulac\u00edch je \u010dasto m\u00edch\u00e1m; nap\u0159\u00edklad u pesticid\u016f m\u00edch\u00e1m neiontov\u00e9 s aniontov\u00fdmi pro lep\u0161\u00ed pronik\u00e1n\u00ed do p\u016fdy.<\/p>\n
Aplikace? Kde m\u00e1m za\u010d\u00edt? V zem\u011bd\u011blstv\u00ed m\u011bn\u00ed sm\u00e1\u010dedla post\u0159ik\u016f pravidla hry. Zaji\u0161\u0165uj\u00ed, \u017ee herbicidy nebo hnojiva p\u0159ilnou k list\u016fm rostlin, \u010d\u00edm\u017e sni\u017euj\u00ed odtok a zvy\u0161uj\u00ed \u00fa\u010dinnost. Pracoval jsem na zem\u011bd\u011blsk\u00fdch produktech, kde p\u0159id\u00e1n\u00ed sm\u00e1\u010dedla 0,1% sn\u00ed\u017eilo spot\u0159ebu vody o 20%, co\u017e zem\u011bd\u011blc\u016fm u\u0161et\u0159ilo pen\u00edze a pomohlo \u017eivotn\u00edmu prost\u0159ed\u00ed. V \u010distic\u00edch prost\u0159edc\u00edch pro dom\u00e1cnost pom\u00e1haj\u00ed \u010distic\u00edm prost\u0159edk\u016fm pronikat do ne\u010distot na povr\u0161\u00edch - p\u0159edstavte si, jak se v\u00e1\u0161 sprej na okna rovnom\u011brn\u011b rozt\u00edr\u00e1, m\u00edsto aby se rozmaz\u00e1val. V pr\u016fmyslu, v kapalin\u00e1ch pro obr\u00e1b\u011bn\u00ed kov\u016f, zlep\u0161uj\u00ed maz\u00e1n\u00ed a chlazen\u00ed t\u00edm, \u017ee l\u00e9pe sm\u00e1\u010dej\u00ed povrchy n\u00e1stroj\u016f. Textilie na n\u011b spol\u00e9haj\u00ed p\u0159i barven\u00ed; bez spr\u00e1vn\u00e9ho sm\u00e1\u010den\u00ed vych\u00e1zej\u00ed barvy nerovnom\u011brn\u011b. Dokonce i v hasic\u00edch p\u011bn\u00e1ch pom\u00e1haj\u00ed sm\u00e1\u010dedla rychleji nas\u00e1knout vodu do ho\u0159\u00edc\u00edch materi\u00e1l\u016f. V\u00fdznamn\u00fdm projektem pro m\u011b byl v\u00fdvoj sm\u00e1\u010dedla pro likvidaci ropn\u00fdch skvrn - pom\u00e1halo emulgovat surovou ropu na vodn\u00edch ploch\u00e1ch, tak\u017ee \u00faklid byl rychlej\u0161\u00ed a m\u00e9n\u011b \u0161pinav\u00fd.<\/p>\n
P\u0159\u00ednosy jsou \u0161ir\u0161\u00ed ne\u017e jen \u0161\u00ed\u0159en\u00ed. Lep\u0161\u00ed sm\u00e1\u010den\u00ed znamen\u00e1 men\u0161\u00ed pot\u0159ebu produktu, co\u017e sni\u017euje n\u00e1klady a odpad. P\u0159i \u010di\u0161t\u011bn\u00ed odpadn\u00edch vod pom\u00e1haj\u00ed odd\u011blovat oleje od vody, \u010d\u00edm\u017e zlep\u0161uj\u00ed \u010di\u0159en\u00ed. Z ekologick\u00e9ho hlediska nahrazuj\u00ed modern\u00ed sm\u00e1\u010dedla na biologick\u00e9 b\u00e1zi z rostlinn\u00fdch zdroj\u016f, jako je kokosov\u00fd o\u0159ech nebo s\u00f3ja, sm\u00e1\u010dedla vyr\u00e1b\u011bn\u00e1 z ropy, \u010d\u00edm\u017e se sni\u017euje jejich toxicita. Pozor v\u0161ak na nev\u00fdhody: n\u011bkter\u00e9 mohou zp\u016fsobovat nadm\u011brn\u00e9 p\u011bn\u011bn\u00ed, pokud nejsou vyv\u00e1\u017eeny odp\u011b\u0148ova\u010di, nebo ve vysok\u00fdch koncentrac\u00edch dr\u00e1\u017ed\u00ed poko\u017eku. P\u0159edpisy, jako je na\u0159\u00edzen\u00ed REACH v Evrop\u011b, po\u017eaduj\u00ed bezpe\u010dn\u011bj\u0161\u00ed varianty, tak\u017ee kl\u00ed\u010dov\u00e9 je testov\u00e1n\u00ed biologick\u00e9 rozlo\u017eitelnosti. Podle m\u00fdch zku\u0161enost\u00ed v\u017edy prov\u00e1d\u011bjte kontrolu kompatibility - sm\u00edchejte sm\u00e1\u010dedlo se z\u00e1kladn\u00edm slo\u017een\u00edm a pozorujte po dobu 24 hodin, abyste odhalili probl\u00e9my, jako je odd\u011blov\u00e1n\u00ed.<\/p>\n
Tipy z praxe: 0,05-0,5% \u010dasto sta\u010d\u00ed. P\u0159i aplikaci na p\u016fdu berte v \u00favahu jej\u00ed typ; p\u00eds\u010dit\u00e9 p\u016fdy se sm\u00e1\u010dej\u00ed snadn\u011bji ne\u017e j\u00edlovit\u00e9. U post\u0159ik\u016f z\u00e1le\u017e\u00ed na konstrukci trysky - jemn\u00e9 mlhy maj\u00ed v\u011bt\u0161\u00ed u\u017eitek z n\u00edzkonap\u011b\u0165ov\u00fdch prost\u0159edk\u016f. Skladov\u00e1n\u00ed? Uchov\u00e1vejte je v chladu a uzav\u0159en\u00e9, abyste zabr\u00e1nili jejich degradaci. \u0160kolil jsem t\u00fdmy v tomto sm\u011bru: zm\u011b\u0159te povrchov\u00e9 nap\u011bt\u00ed tenzometrem p\u0159ed a po p\u0159id\u00e1n\u00ed prost\u0159edku, abyste mohli kvantifikovat zlep\u0161en\u00ed.<\/p>\n
P\u0159i pohledu do budoucna jsou sm\u00e1\u010dedla st\u00e1le chyt\u0159ej\u0161\u00ed. Verze s nanotechnologiemi slibuj\u00ed velmi n\u00edzk\u00e9 d\u00e1vky p\u0159i stejn\u00e9m \u00fa\u010dinku, co\u017e je ide\u00e1ln\u00ed pro p\u0159esn\u00e9 zem\u011bd\u011blstv\u00ed. Na vzestupu jsou biopovrchov\u011b aktivn\u00ed l\u00e1tky z mikrob\u016f, kter\u00e9 nab\u00edzej\u00ed ekologick\u00e9 alternativy s antimikrobi\u00e1ln\u00edmi \u00fa\u010dinky. S klimatick\u00fdmi zm\u011bnami jsou aktu\u00e1ln\u00ed sm\u00e1\u010dedla pro zavla\u017eov\u00e1n\u00ed odoln\u00e1 v\u016f\u010di suchu - pom\u00e1haj\u00ed vod\u011b proniknout hloub\u011bji do such\u00e9 p\u016fdy. Podle m\u00e9ho n\u00e1zoru se s rozvojem udr\u017eiteln\u00e9ho pr\u016fmyslu budou tyto prost\u0159edky vyv\u00edjet jako multifunk\u010dn\u00ed, mo\u017en\u00e1 budou kombinovat zvlh\u010dov\u00e1n\u00ed s ochranou proti \u0161k\u016fdc\u016fm nebo UV z\u00e1\u0159en\u00ed.<\/p>\n
Nakonec, sm\u00e1\u010dedla mo\u017en\u00e1 nejsou nijak okouzluj\u00edc\u00ed, ale jsou nezbytn\u00e1 pro efektivitu v\u0161ech desek. Jsou m\u00fdm denn\u00edm chlebem, kter\u00fd v nes\u010detn\u00fdch projektech m\u011bn\u00ed \u201cdostate\u010dn\u011b dobr\u00e9\u201d na \u201c\u0161pi\u010dkov\u00e9\u201d. Pokud si pohr\u00e1v\u00e1te s kapalinami a povrchy, vyzkou\u0161ejte je - mohly by b\u00fdt t\u00edm vylep\u0161en\u00edm, kter\u00e9 pot\u0159ebujete.<\/p>","protected":false},"excerpt":{"rendered":"
Sm\u00e1\u010dedlo: Pokud jste n\u011bkdy p\u0159em\u00fd\u0161leli o tom, pro\u010d va\u0161e zahrada [...]<\/p>","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"default","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","ast-disable-related-posts":"","theme-transparent-header-meta":"","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"default","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"ast-content-background-meta":{"desktop":{"background-color":"var(--ast-global-color-4)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"var(--ast-global-color-4)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"var(--ast-global-color-4)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"footnotes":""},"categories":[2],"tags":[],"class_list":["post-7","post","type-post","status-publish","format-standard","hentry","category-news"],"aioseo_notices":[],"_links":{"self":[{"href":"https:\/\/wettingagent.net\/cs\/wp-json\/wp\/v2\/posts\/7","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/wettingagent.net\/cs\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/wettingagent.net\/cs\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/wettingagent.net\/cs\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/wettingagent.net\/cs\/wp-json\/wp\/v2\/comments?post=7"}],"version-history":[{"count":1,"href":"https:\/\/wettingagent.net\/cs\/wp-json\/wp\/v2\/posts\/7\/revisions"}],"predecessor-version":[{"id":8,"href":"https:\/\/wettingagent.net\/cs\/wp-json\/wp\/v2\/posts\/7\/revisions\/8"}],"wp:attachment":[{"href":"https:\/\/wettingagent.net\/cs\/wp-json\/wp\/v2\/media?parent=7"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/wettingagent.net\/cs\/wp-json\/wp\/v2\/categories?post=7"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/wettingagent.net\/cs\/wp-json\/wp\/v2\/tags?post=7"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}