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Carboxymethyl Cellulose Sodium ee Dahaarka Warqadda

Carboxymethyl Cellulose Sodium ee Dahaarka Warqadda

Carboxymethyl cellulose sodium (CMC-Na) waa polymer biyo-milmi leh oo si weyn loogu isticmaalo warshadaha waraaqaha sida wakiilka dahaarka.CMC-Nawaxaa laga soo qaatay cellulose, kaas oo ah polymer-ka dabiiciga ah ee laga helo gidaarada unugyada dhirta. Wax ka beddelka kiimikaad ee cellulose ee kooxaha karboksymethyl waxay keentaa polymer-biyood-milmi leh oo leh sifooyin filim-samayn heer sare ah, taasoo ka dhigaysa doorasho ku habboon codsiyada daahan warqadda.

Dahaarka warqaddu waa habka lagu dabaqayo lakabka khafiifka ah ee walxaha dahaarka dusha warqadda si loo hagaajiyo daabacaadda, muuqaalkeeda, iyo waxqabadkeeda. Qalabka dahaarka waxaa loo kala saari karaa laba qaybood: dahaarka midabaysan iyo kuwa aan midab lahayn. Dahaarka midabka leh ayaa ka kooban midabyo midab leh, halka daaha aan midab lahayn ay yihiin kuwo cad ama hufan. CMC-Na waxaa sida caadiga ah loo isticmaalaa sida xidhe ee daahan aan midab lahayn sababtoo ah astaamihiisa samaynta filimada iyo awoodda lagu hagaajinayo sifooyinka dusha sida simannaanta, gloss, iyo qaadashada khad.

Isticmaalka CMC-Na ee dahaarka warqadda waxay bixisaa faa'iidooyin dhowr ah, oo ay ku jiraan hagaajinta daahan, daabacaadda la xoojiyey, iyo hagaajinta caabbinta biyaha. Maqaalkan, waxaan ku baari doonaa faa'iidooyinkan si faahfaahsan, iyo sidoo kale arrimaha kala duwan ee saameeya waxqabadka CMC-Na ee codsiyada daahan warqad.

Ku-dhejinta Dahaarka oo la hagaajiyay

Mid ka mid ah faa'iidooyinka muhiimka ah ee isticmaalka CMC-Na ee dahaarka warqadda ayaa ah awoodda ay u leedahay inay hagaajiso adhesion daahan. CMC-Na waa polymer hydrophilic kaas oo la falgali kara dusha hydrophilic ee fiilooyinka waraaqaha, taasoo keentay hagaajinta kobaca u dhexeeya daahan iyo dusha warqadda. Kooxaha carboxymethyl ee CMC-Na waxay bixiyaan cufnaanta sare ee goobaha si xun loo dallacay kuwaas oo samayn kara bonds ionic kooxo si togan loo dallacay fiilooyinka waraaqaha, sida amine ama kooxaha karboksilate.

Intaa waxaa dheer, CMC-Na waxay sidoo kale samayn kartaa bonds hydrogen oo leh kooxaha hydroxyl ee fiilooyinka cellulose, sii wanaajinta adhesion u dhexeeya daahan iyo dusha warqadda. Ku dheggan la wanaajiyay waxa uu keenayaa lakab isku mid ah oo isku mid ah waxana ay yaraynaysaa halista delamination-ka dahaarka inta lagu jiro talaabooyinka habaynta ee xiga sida calending ama daabacaadda.

Daabacaadda La Wanaajiyey

Faa'iidada kale ee isticmaalka CMC-Na ee daahan warqad waa awoodda ay u leedahay in ay kor u daabacaadda. CMC-Na waxay wanaajin kartaa simanaanta dusha sare ee warqadda iyadoo buuxinaysa meelaha bannaan iyo godadka u dhexeeya fiilooyinka warqadaha, taasoo keentay in dusha sare ee lebbiska ah ay ka yaraato cillado yar. Wanaagsanaantaan la hagaajiyay waxay u horseedi kartaa wareejinta khad ka wanaagsan, isticmaalka khad oo yaraada, iyo tayada daabacaadda oo hagaagtay.

Intaa waxaa dheer, CMC-Na waxay sidoo kale wanaajin kartaa soo-dhoweynta khad ee dusha warqadda iyadoo la siinayo lakab daahan oo isku mid ah kaas oo nuugaya oo si siman u fidiya qalinka. Soo dhawayntan khad ee la wanaajiyay waxa ay keeni kartaa sawiro fiiqan, midab wanaagsan, iyo khad khad oo yaraada.

Iska caabinta biyaha oo la hagaajiyay

Iska caabbinta biyuhu waa hanti muhiim u ah dahaarka warqadaha, gaar ahaan codsiyada halka warqaddu ay soo gaadhi karto qoyaan ama qoyaan. CMC-Na waxay wanaajin kartaa iska caabinta biyaha ee dahaarka warqadaha iyadoo la samaynayo lakab xannibaad ah oo ka hortagaya inay biyuhu galaan substrate-ka warqadda.

Dabeecadda hydrophilic ee CMC-Na waxay sidoo kale u oggolaaneysaa inay la falgasho molecules biyaha, taasoo keentay iska caabbinta biyaha ee hagaajinta iyada oo loo marayo isku-xidhka hydrogen iyo samaynta shabakad isku-dhafan oo polymer ah. Heerka caabbinta biyaha waxaa lagu xakameyn karaa iyadoo la hagaajinayo diiradda iyo heerka beddelka CMC-Na ee qaabeynta daahan.


Waqtiga boostada: Mar-19-2023
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