Sababtoo ah qaab dhismeedka wanaagsan ee organicsaliid silikoon, waxaa si weyn loogu dabaqaa dhamaystirka jilicsanaanta dharka.Noocyadeeda ugu muhiimsan waa: jiilka kowaad ee saliidda silikoon hydroxyl iyo saliidda silikoon hydrogen, saliidda silikoon jiilka labaad, ilaa jiilka saddexaad ee saliid silikoon oo badan.Maaddaama baahida dadka ee gacan-ku-haynta ay soo hagaagtay, saliidda silikoon ee organic waxay soo martay tobanaan sano oo horumar ah.
1.Hydroxyl saliid silikoon
Qaab dhismeedka ugu weyn ee saliidda silikoon ee hydroxyl waa polymer toosan oo leh kooxaha hydroxyl ee labada daraf iyo silica silikoon oo ah silsiladda ugu weyn.Habka isku dhafka ah ee caadiga ah waa ka lagu sameeyay biyo-celin polycondensation dimethyl dichlorosilane.Sababtoo ah tamarta dusha hoose ee hooseeya, polarity daciif ah iyo xayeysiis daciif ah oo ku saabsan dusha sare ee substrate, codsiga caadiga ah ee saliidda silikoon ee hydroxyl waxay u baahan tahay miisaan sare oo kelli ah si ay u yeelato saameyn codsi wanaagsan.Sidaa darteed, guud ahaan saliidda silikoon ee hydroxyl loo isticmaalo dhamaystirkajilcisawaa polymer leh miisaan sare oo kelli ah.Waxaa jira dib u dhac ku yimaada in sida saliidda silikoon, ay sabab u tahay tamarta hoose ee hoose iyo biyaha aad u liidata, qayb sare oo emulsifiers ah iyo mashiinka dhogorta iyo kala firdhinta oo leh kala firdhisanaan sare ayaa loo baahan yahay si loo emulsify oo u kala firdhiyo microemulsions.Laakiin iyadoo taasi jirto, xasilloonideeda gabowga ayaa weli liidata.Weli waxaa jiri doona ifafaale stratification emulsion ka dib markii muddo dheer la meeleeyay.
2.Hydrogen saliid silikoon
Qaab dhismeedka ugu weyn ee saliidda silikoon ee hydrogen waa polysiloxane oo leh dammaanad silikoon-hydrogen si siman loogu qaybiyay kooxda dhinaca silsiladda oksijiinta silikoon.Hababka isku dhafka ah ee caadiga ah waxaa ka mid ah kondensation hydrolytic ee methyl hydrodichlorosilane iyo polymerization-ka furitaanka giraanta hydrosiloxane.Sababtoo ah xasiloonida dammaanadda silikoon-hydrogen waa mid liidata, way fududahay in la fuuq-baxo sidaas darteedna way fududahay in lagu dhajiyo kooxaha polar ee alaabta dharka.Markaa waxay leedahay hanti adsorptive ka fiican.Waxay leedahay waxqabadka codsiga wanaagsan ee fiilooyinka cellulose iyo fiilooyinka borotiinka, halka ay saameyn xun ku leedahay fiilooyinka kiimikada.Si la mid ah saliidda silikoon ee hydroxyl, waxqabadkeeda emulsifying ma fiicna xasilloonideeduna waa liidataa.Haddii maadada haydaroojin ay aad u sarreyso inta lagu jiro codsiga, way fududahay in la horseedo in maadada hydrogen-ka xariijisan ay aad u sarreyso, taas oo khatar ku ah deegaanka heerkulka sare marka la dejinayo.
3.Saliida silikoon ee Amino
Qaab dhismeedka ugu weyn eesaliid silikoon amino isa polysiloxane oo ay ku jiraan kooxda amino ee dhinacyada ka dib polymerization iyadoo lagu darayo wakiilka isku xirka amino silane.Jilicsanaanta iyo kala firdhinta biyaha ee polysiloxane ayaa si weyn loo wanaajiyey sababtoo ah adsorption-ka wanaagsan iyo awoodda isku-xidhka kooxda amino-ka ee dharka iyo polarity wanaagsan.Gaar ahaan maryaha fiilooyinka cellulose, waxay leedahay saameyn codsi aad u fiican.Iyadoo la hagaajinayo qiimaha ammonia, nooca wakiilka isku xirka amino silane iyo miisaanka kelli ee saliidda silikoon amino waa la hagaajin karaa.Taasi waxay diyaarin kartaa saamaynta codsiga qani ah.Si kastaba ha ahaatee, sababtoo ah silsiladeeda ugu weyn ayaa weli ah qaabdhismeedka siloxane, sidaas darteed waxay u baahan tahay wakiil badan oo emulsifying si loo gaaro saameyn wanaagsan oo emulsifying.Isla mar ahaantaana, sababtoo ah waxqabadka amino ee saliidda silikoon amino waa mid sarreeya iyo sidoo kale waxay ku taal lafta dhinaca.Markaa way adag tahay in laga saaro marada ka dib xayeysiinta.Taasi way adkaan doontaa in laga saaro dheeha dharka iyo habka dhamaystirka marka ay u baahan tahay in la beddelo midabka, tirtirto laalaabyada ama dhibco silikoon ah.Sidoo kale iska caabinta biyaha adag ama biyaha alkali ee emulsion ay labaduba waa daciif.
4.Saliida silikoon xannibi
Qaab dhismeedka ugu weyn ee saliidda silikoon ee xannibaadda waa in silsiladda ugu weyn ee polysiloxane ay ku dhejisan tahay, la been abuurtay oo polymerized oo leh qaybo silsilad polyether-ka hydrophilic ah.Sida habka xannibaadda, been-abuurka iyo polymerization ee qaybta silsiladda amino, taas oo hagaajinaysa waxqabadka hydrophilic iyo emulsifying hantida siloxane.Iyadoo la hagaajinayo saamiga, noocyada iyo miisaanka kelli ee saddexda qaybood ee silsiladda, waxaa jira diyaarin kara alaabooyin badan.Si loo sii wanaajiyo qulqulka hydrophilic, waxay ku habboon tahay dhamaystirka jilicsanaanta fiilooyinka kiimikada, oo leh waxqabad wanaagsan oo wax ka beddelka midabka iyo saarista.Sababtoo ah kooxda amino waxaa iska leh ammonia, ammonia sare iyo xitaa ammonia quaternary, ma fududa in jaalaha ah.Sidoo kale waa jileec caan ah oo cilmi baaris wax ka beddel ah maalmahan.
Waqtiga boostada: Oct-08-2021