Abubuwan da ke Gudanar da Daidaiton Emulsions;
A aikace-aikace na aiki, kwanciyar hankali na emulsion yana nufin ikon digo-digo na matakan da aka watsar don tsayayya da haɗuwa. Daga cikin ma'aunin auna daidaiton emulsion, ƙimar haɗuwa tsakanin digo-digo da aka watsa yana da matuƙar muhimmanci; ana iya tantance shi ta hanyar auna yadda adadin digo-digo na kowane girma naúrar ke canzawa akan lokaci. Yayin da digo-digo a cikin emulsion ke haɗuwa zuwa manyan kuma a ƙarshe ke haifar da karyewa, saurin wannan tsari ya dogara ne akan waɗannan abubuwan: halayen zahiri na fim ɗin da ke tsakanin fuska, ƙin lantarki tsakanin digo-digo, hana sikari daga fina-finan polymer, danko na matakin ci gaba, girman digo-digo da rarrabawa, rabon girman lokaci, zafin jiki, da sauransu.
Daga cikin waɗannan, yanayin zahiri na fim ɗin da ke tsakanin fuskoki, hulɗar lantarki, da kuma toshewar sitiri sune mafi mahimmanci.
(1) Sifofin Fim ɗin Facial
Haɗuwa tsakanin ɗigon ruwa da aka watsar shine abin da ake buƙata don haɗuwa. Haɗuwa tana ci gaba ba tare da tsayawa ba, tana rage ƙananan ɗigon ruwa zuwa manyan har sai emulsion ya karye. A yayin haɗuwa da haɗuwa, ƙarfin injin fim ɗin haɗin ɗigon ruwa yana matsayin babban abin da ke ƙayyade daidaiton emulsion. Don ba fim ɗin haɗin gwiwa ƙarfin injiniya mai ƙarfi, dole ne ya zama fim mai haɗin kai - ƙwayoyin surfactant ɗin da ke cikinsa da aka haɗa su da ƙarfi mai ƙarfi a gefe. Dole ne fim ɗin ya kasance yana da kyakkyawan sassauci, don haka lokacin da lalacewar gida ta faru sakamakon karo na ɗigon ruwa, zai iya gyara kansa ba zato ba tsammani.
(2) Hulɗar Wutar Lantarki
Faɗin digo a cikin emulsions na iya samun wasu caji saboda dalilai daban-daban: ionization na ionic surfactants, shaƙar takamaiman ions akan saman digo, gogayya tsakanin digo da yankin da ke kewaye, da sauransu. A cikin emulsions mai-cikin-ruwa (O/W), cajin digo yana taka muhimmiyar rawa wajen hana haɗuwa, haɗuwa, da kuma karyewa daga ƙarshe. A cewar ka'idar kwanciyar hankali ta colloid, ƙarfin van der Waals yana jawo digo tare; duk da haka lokacin da digo ya kusanci sosai don saman su ya yi karo, yunƙurin lantarki yana hana ƙarin kusanci. A bayyane yake, idan yunƙurin ya fi jan hankali, digo ba sa saurin haɗuwa da haɗuwa, kuma emulsion ɗin ya kasance mai karko; in ba haka ba, haɗuwa da fashewa suna faruwa.
Dangane da sinadarin ruwa a cikin mai (W/O), digo-digo na ruwa yana ɗauke da ƙarancin caji, kuma saboda ci gaba da matakin yana da ƙarancin dielectric constant da kauri mai kauri biyu, tasirin electrostatic yana yin ƙaramin tasiri akan kwanciyar hankali.
(3) Daidaitawar Steric
Lokacin da polymers suka zama emulsifiers, layin da ke tsakanin fuskoki ya zama mai kauri sosai, yana samar da garkuwar lyophilic mai ƙarfi a kusa da kowace digo - shingen sarari wanda ke hana ɗigon ruwa kusantowa da yin hulɗa. Yanayin lyophilic na ƙwayoyin polymer kuma yana kama da ruwa mai ci gaba a cikin layin kariya, yana mai da shi kama da gel. Saboda haka, yankin da ke tsakanin fuskoki yana nuna ƙaruwar danko tsakanin fuskoki da kuma kyakkyawan viscoelasticity, wanda ke taimakawa hana haɗuwar ɗigon ruwa da kuma kiyaye kwanciyar hankali. Ko da wasu haɗuwa sun faru, emulsifiers na polymer sau da yawa suna taruwa a raguwar haɗin gwiwa a cikin siffofin fibrous ko crystalline, suna kauri fim ɗin da ke tsakanin fuskoki kuma ta haka suna hana ƙarin haɗuwa.
(4) Daidaiton Rarraba Girman Digo
Idan aka raba wani yanki na musamman na ɗigon ruwa zuwa ɗigon ruwa masu girma dabam-dabam, tsarin da ya ƙunshi manyan ɗigon ruwa yana da ƙaramin yanki na ɗigon ruwa kuma don haka yana da ƙarancin kuzarin ɗigon ruwa, wanda ke ba da ƙarin kwanciyar hankali na thermodynamic. A cikin emulsion inda ɗigon ruwa na manyan da ƙananan girma suke haɗuwa, ƙananan ɗigon ruwa suna raguwa yayin da manyan ke girma. Idan wannan ci gaban ya ci gaba ba tare da an duba shi ba, daga ƙarshe zai faru. Saboda haka, emulsion mai kunkuntar, rarrabawar girman ɗigon ruwa iri ɗaya ya fi karko fiye da wanda matsakaicin girman ɗigon ruwa yake iri ɗaya amma girmansa ya faɗi.
(5) Tasirin Zafin Jiki
Bambancin zafin jiki na iya canza yanayin tashin hankali a tsakanin fuskoki, halaye da danko na fim ɗin da ke tsakanin fuskoki, da kuma yadda sinadarin emulsifier ke narkewa a matakai biyu, matsin lamba na tururin matakan ruwa, da kuma motsin zafi na digo-digo da aka watsa. Duk waɗannan canje-canjen na iya shafar kwanciyar hankali na emulsion kuma suna iya haifar da juyawa ko karyewar lokaci.
Lokacin Saƙo: Nuwamba-27-2025