Hydroxyethyl cellulose (HEC) waa walax polymer ah oo aan biyo lahayn oo si weyn loogu isticmaalo qurxinta, daawooyinka, rinjiga, dahaarka, dhismaha iyo meelaha kale. Waxay leedahay dhumuc weyn, suuxdin, kala firdhis, emulsification, sameynta filimada, haynta biyaha iyo sifooyin kale, sidaa darteed waxay noqotay wakiil kaaliye muhiim ah oo warshado badan. Si kastaba ha ahaatee, hydroxyethyl cellulose si toos ah loogama helo walxaha dabiiciga ah, laakiin waxaa laga helaa iyadoo kiimiko ahaan wax laga beddelayo cellulose dabiiciga ah. Si taas loo gaaro, si loo fahmo isha dabiiciga ah ee cellulose hydroxyethyl, marka hore waxaan u baahanahay inaan fahanno isha iyo qaab-dhismeedka cellulose.
Ilaha dabiiciga ah ee cellulose
Cellulose waa mid ka mid ah polymer-yada ugu badan ee dabiiciga ah ee dhulka ku yaal, waxayna si weyn ugu jirtaa derbiyada unugyada dhirta, gaar ahaan dhirta qoryaha leh, suufka, flax iyo fiilooyinka kale ee dhirta. Waa qayb muhiim ah oo ka mid ah qaab-dhismeedka dhirta waxayna bixisaa xoog farsamo iyo xasillooni. Cutubka aasaasiga ah ee cellulose waa molecule gulukoos ah, kaas oo ku xiran xidhmooyinka β-1,4-glycosidic si loo sameeyo qaab-dhismeed silsilad dheer ah. Maadaama uu yahay walxo polymer dabiici ah, cellulose waxay leedahay sifooyin jireed iyo kiimiko oo aad u fiican, taasoo ka dhigaysa walxo cayriin oo muhiim u ah noocyada kala duwan ee wax soo saarka.
Habka diyaarinta ee hydroxyethyl cellulose
In kasta oo cellulose lafteedu ay leedahay sifooyin badan oo aad u fiican, haddana heerka isticmaalkeeda ayaa xaddidan ilaa xad gaar ah. Sababta ugu weyn ayaa ah in cellulose ay leedahay milmi liidata, gaar ahaan milmi yar oo biyaha ku jira. Si loo hagaajiyo hantidan, saynisyahannadu waxay si kiimiko ah u beddelaan cellulose si ay u diyaariyaan noocyo kala duwan oo cellulose ah. Hydroxyethyl cellulose waa cellulose ether oo biyo ku milma oo laga helo ethoxylating cellulose dabiiciga ah iyada oo loo marayo falgal kiimiko.
Habka diyaarinta gaarka ah, cellulose-ka dabiiciga ah marka hore waxaa lagu milmaa xalka alkali, ka dibna ethylene oxide ayaa lagu daraa nidaamka falcelinta. Falcelinta Ethoxylation ee ethylene oxide iyo kooxaha hydroxyl ee cellulose waxay dhacdaa si loo soo saaro hydroxyethyl cellulose. Wax ka beddelkani wuxuu kordhiyaa hydrophilicity-ka silsiladaha cellulose, taasoo hagaajinaysa milmideeda iyo sifooyinka viscosity ee biyaha.
Ilaha ugu muhiimsan ee alaabta ceeriin
Waxyaabaha ugu muhiimsan ee ceeriin dabiiciga ah ee loogu talagalay diyaarinta hydroxyethyl cellulose waa cellulose, ilaha dabiiciga ah ee cellulose-na waxaa ka mid ah:
Alwaax: Unugyada cellulose-ka ee ku jira alwaaxa ayaa aad u badan, gaar ahaan qoryaha waaweyn iyo kuwa caleenta ballaaran leh, halkaas oo cellulose-ku uu gaari karo 40%-50%. Alwaaxdu waa mid ka mid ah ilaha ugu muhiimsan ee cellulose-ka warshadaha, gaar ahaan sameynta waraaqaha iyo soo saarista waxyaabaha laga soo saaro cellulose-ka.
Suufka: Faybarka cudbigu wuxuu ka kooban yahay cellulose saafi ah, tirada cellulose-ka ee suufka ku jirtana waxay ka badan tahay 90%. Sababo la xiriira nadiifinteeda sare, faybarka cudbigu badanaa waxaa loo isticmaalaa diyaarinta waxyaabaha laga soo saaro cellulose tayo sare leh.
Faybaraha dhirta sida flax iyo hemp: Faybaraha dhirtan ayaa sidoo kale qani ku ah cellulose, maadaama fiilooyinkan dhirta ay badanaa leeyihiin awood farsamo oo sare, waxay sidoo kale leeyihiin faa'iidooyin gaar ah oo ku jira soo saarista cellulose.
Qashinka beeraha: oo ay ku jiraan caws, caws qamadi, caws galleyda, iwm. Agabkani wuxuu ka kooban yahay xaddi gaar ah oo cellulose ah, cellulose-na waxaa laga soo saari karaa iyada oo loo marayo hababka daaweynta ee ku habboon, taasoo bixinaysa ilo raqiis ah oo la cusboonaysiin karo oo ah agab ceeriin ah oo loogu talagalay soo saarista waxyaabaha ka soo baxa cellulose.
Meelaha loo adeegsado ee hydroxyethyl cellulose
Iyada oo ay ugu wacan tahay sifooyinka gaarka ah ee cellulose-ka hydroxyethyl, waxaa si weyn loogu isticmaalaa meelo badan. Kuwa soo socda waa dhowr meelood oo muhiim ah oo loo adeegsado:
Warshadaha Dhismaha: Hydroxyethyl cellulose waxaa si weyn loogu isticmaalaa agabka dhismaha sida wakiilka dhumucda iyo ilaalinta biyaha, gaar ahaan hoobiyaha sibidhka, gypsum, budada putty iyo agab kale, kuwaas oo si wax ku ool ah u horumarin kara dhismaha iyo sifooyinka ilaalinta biyaha ee agabka.
Warshadaha kiimikada maalinlaha ah: Saabuunta, alaabada daryeelka maqaarka, shaambooyada iyo alaabada kale ee kiimikada maalinlaha ah, hydroxyethyl cellulose waxaa loo isticmaalaa sidii dhumuc iyo xasilin si loo hagaajiyo dareenka iyo xasilloonida badeecada.
Rinjiyeynta iyo dahaarka: Warshadaha dahaarka, hydroxyethyl cellulose waxaa loo isticmaalaa sidii wakiilka xakamaynta rheology si loo hagaajiyo shaqada dahaarka loona ilaaliyo inuu libdho.
Qaybta daawada: Diyaarinta daawooyinka, hydroxyethyl cellulose waxaa loo isticmaali karaa sidii qalab xidha, dhumuc-saare iyo wakiil joojiya kiniiniyada si loo hagaajiyo sifooyinka sii deynta iyo xasilloonida daawooyinka.
In kasta oo hydroxyethyl cellulose uusan ahayn walax dabiici ah, haddana walaxdeeda ceeriin ee aasaasiga ah, cellulose, ayaa si weyn ugu jirta dhirta dabiiciga ah. Iyada oo loo marayo wax ka beddelka kiimikada, cellulose dabiiciga ah waxaa loo rogi karaa hydroxyethyl cellulose oo leh waxqabad aad u wanaagsan waxaana lagu dabaqi karaa warshado kala duwan. Dhirta dabiiciga ah sida alwaaxa, cudbiga, flax, iwm. waxay bixiyaan ilo qani ah oo agab ceeriin ah si loo soo saaro hydroxyethyl cellulose. Iyadoo la horumarinayo sayniska iyo tignoolajiyada iyo kororka baahida warshadaha, habka wax soo saarka ee hydroxyethyl cellulose sidoo kale si joogto ah ayaa loo hagaajinayaa, waxaana la filayaa inuu muujiyo qiimaheeda gaarka ah ee goobo badan mustaqbalka.
Waqtiga boostada: Oktoobar-23-2024