Hydroxyethylcellulose (HEC) waa polymer si weyn looga isticmaalo warshado kala duwan, oo ay ku jiraan waxyaalaha la isku qurxiyo, daawooyinka, iyo cuntada. Waa derivative cellulose la beddelay oo ugu horreyn laga soo qaatay cellulose dabiiciga ah, polysaccharide ah oo laga helo gidaarada unugyada dhirta. Xaruntan wax-ka-beddelka leh waxaa lagu farsameeyaa habka wax ka beddelka kiimikaad kaas oo ku lug leh falcelinta cellulose leh ethylene oxide si ay u soo bandhigto kooxaha hydroxyethyl ee lafta dhabarka cellulose. Natiijadu waxay leedahay hydroxyethylcellulose sifooyin rheological gaar ah, taas oo ka dhigaysa mid qiimo leh codsiyada kala duwan.
Cellulose, oo ah isha aasaasiga ah ee hydroxyethylcellulose, aad bay u badan tahay dabeecadda waxaana laga heli karaa ilo kala duwan oo dhirta. Ilaha caadiga ah ee cellulose waxaa ka mid ah saxarka alwaax, suuf, hemp, iyo dhirta kale ee fibros ah. Soo saarista cellulose caadi ahaan waxay ku lug leedahay jebinta walxaha dhirta iyada oo loo marayo hababka makaanikada ama kiimikooyinka si loo go'doomiyo fiilooyinka cellulose. Marka la go'doomiyo, cellulose waxay maraysaa habayn dheeraad ah si looga saaro wasakhda oo loogu diyaariyo beddelka kiimikada.
Isku dhafka hydroxyethylcellulose wuxuu ku lug leeyahay falcelinta cellulose leh ethylene oxide ee xaaladaha la xakameeyey. Ethylene oxide waa unug dabiici ah oo leh qaacidada kiimikada C2H4O, oo inta badan loo isticmaalo soosaarka kiimikooyinka warshadaha kala duwan. Marka lagu falceliyo cellulose, ethylene oxide waxay ku daraysaa kooxaha hydroxyethyl (-OHCH2CH2) laf dhabarta cellulose, taasoo keentay samaynta hydroxyethylcellulose. Heerka beddelka, taas oo tixraacaysa tirada kooxaha hydroxyethyl ee lagu daray unug kasta oo gulukoos ee silsiladda cellulose, waa la xakameyn karaa inta lagu jiro habka isku-dhafka si loogu habeeyo sifooyinka alaabta ugu dambeysa.
Wax ka beddelka kiimikaad ee cellulose si loo soo saaro hydroxyethylcellulose waxay siisaa dhowr waxyaalood oo faa'iido leh polymer-ka. Guryahaan waxaa ka mid ah milanka biyaha oo kordhay, xoojinta dhumucdi iyo awoodaha gelling, xasiloonida la xoojiyey ee kala duwan ee pH iyo xaaladaha heerkulka, iyo waafaqsanaanta noocyo kala duwan oo maaddooyinka kale sida caadiga ah loo isticmaalo qaabaynta. Sifooyinkan ayaa ka dhigaya hydroxyethylcellulose wax lagu daro oo badan oo leh codsiyo badan oo warshado kala duwan ah.
Warshadaha la isku qurxiyo, hydroxyethylcellulose waxaa si weyn loogu isticmaalaa sida wakiilka dhumuc, xasiliye, iyo emulsifier ee alaabta daryeelka gaarka ah ee kala duwan sida shaambada, qaboojiyaha, looshannada, kiriimyada, iyo jeelyada. Awoodeeda wax ka beddelka viscosity iyo texture of formulations u ogolaanaya abuurista alaabta leh sifooyinka dareenka la doonayo iyo sifooyinka waxqabadka. Intaa waxaa dheer, hydroxyethylcellulose waxay u dhaqmi kartaa sidii wakiil filim sameeye, taasoo bixisa xannibaad ka hortag ah maqaarka ama dusha timaha.
Qaababka dawooyinka, hydroxyethylcellulose waxa loo isticmaalaa xidhe ahaan wax soo saarka kiniinka, halkaas oo ay ka caawiso in la isku hayo maaddooyinka firfircoon oo ay wanaajiso xoogga farsamada ee kiniinka. Waxa kale oo loo shaqeeyaa sidii wakiilka hakinta ee hababka dareeraha ah si looga hortago dejinta walxaha adag iyo in la hubiyo qaybinta isku midka ah ee maaddooyinka firfircoon. Intaa waxaa dheer, hydroxyethylcellulose waxay u adeegtaa sidii wax ka beddelka viscosity ee xalalka indhaha iyo jeliyeyaasha jirka la mariyo, iyaga oo kor u qaadaya sifooyinkooda saliidda iyo kordhinta waqtiga ay ku nool yihiin dusha indhaha ama maqaarka.
Warshadaha cuntada, hydroxyethylcellulose waxay u heshaa codsiyada sida dhumuc weyn, xasiliye, iyo wakiilka jelling ee noocyo kala duwan oo cunto ah, oo ay ku jiraan suugo, labiska, macmacaanka, iyo cabitaannada. Waxay hagaajin kartaa qaabka, afka, iyo xasiloonida shelf ee qaabaynta cuntada iyada oo aan saameyn ku yeelan dhadhankooda ama urkooda. Hydroxyethylcellulose waxaa guud ahaan loo aqoonsan yahay inay tahay badbaado (GRAS) loogu isticmaalo cuntada ee maamulka nidaaminta sida Maamulka Cuntada iyo Dawooyinka ee Maraykanka (FDA) iyo Maamulka Badbaadada Cunnada Yurub (EFSA).
hydroxyethylcellulose waa cellulose qiimo leh oo ka soo jeeda ilaha cellulose ee dabiiciga ah iyada oo loo marayo isbeddel kiimikaad leh ethylene oxide. Sifooyinkeeda rheological ee gaarka ah ayaa ka dhigaya wax lagu daro waxyaabaha la isku qurxiyo, daawooyinka, iyo alaabta cuntada, halkaas oo ay u shaqeyso sidii dhumuc weyn, xasiliye, binder, emulsifier, iyo wakiilka jelling. Codsiyo badan oo kala duwan iyo astaanta badbaadada wanaagsan, hydroxyethylcellulose waxay sii ahaanaysaa qayb muhiim ah oo ka mid ah noocyada kala duwan ee macaamiisha iyo warshadaha.
Waqtiga boostada: Abriil-12-2024