Rinjiga cinjirka ah waa isku dhafka midabada, kala firdhisyada buuxinta iyo kala firdhisanaanta polymerka, iyo waxyaabaha lagu daro waa in lagu hagaajiyaa viscosity-kiisa si uu u yeesho sifooyinka rheological ee looga baahan yahay marxalad kasta oo wax soo saar ah, kaydinta iyo dhismaha.Waxyaabaha lagu daro waxaa guud ahaan loo yaqaan dhumucyada, taas oo kordhin karta viscosity ee daaha iyo hagaajinta sifooyinka rheological ee daahan, sidaas darteed waxay sidoo kale loo yaqaan dhumucyada rheological.
Kuwa soo socdaa waxay soo bandhigayaan oo kaliya sifooyinka ugu muhiimsan ee dhumucyada cellulose ee sida caadiga ah loo isticmaalo iyo codsigooda rinjiga cinjirka ah.
Qalabka Cellulosic ee lagu dabaqi karo daaha waxaa ka mid ah methyl cellulose, hydroxyethyl cellulose, iyo hydroxypropyl methyl cellulose.Muuqaalka ugu weyn ee dhumucda cellulose waa in saamaynta dhumucdiisu ay tahay mid cajiib ah, oo waxay siin kartaa rinjiga saameyn biyo-hayn gaar ah, taas oo dib u dhigi karta wakhtiga qalajinta rinjiga ilaa xad, iyo sidoo kale ka dhigi rinji wuxuu leeyahay thixotropy gaar ah. ka hortagga in rinjiga uu qallalo.Roobabka iyo kala-soocidda inta lagu jiro kaydinta, si kastaba ha ahaatee, dhumucyada noocan oo kale ah waxay sidoo kale leeyihiin faa'iido darrooyinka heerka liinta ee rinjiga, gaar ahaan marka la isticmaalayo darajooyinka viscosity-sare.
Cellulose waa walax nafaqeeyayaalka yar yar, sidaas awgeed waa in la xoojiyaa tallaabooyinka ka hortagga caarada marka la isticmaalayo.Dhumucyada Cellulosic kaliya ma dhumucdi karaan wejiga biyaha, laakiin wax saameyn ah oo dhumuc ah kuma laha qaybaha kale ee rinjiga biyaha ku salaysan, mana keeni karaan isdhexgalka weyn ee u dhexeeya midabka iyo qaybaha emulsion ee rinjiga, sidaas darteed ma hagaajin karaan rheology ee rinjiga. , Guud ahaan, waxa kaliya oo ay kordhin kartaa viscosity ee daahan ee heerarka xiirid hoose iyo dhexdhexaad ah (caadi ahaan loo yaqaan KU viscosity).
1. Hydroxyethyl cellulose
Tilmaamaha iyo moodooyinka alaabta hydroxyethyl cellulose waxaa inta badan lagu kala soocaa iyadoo loo eegayo heerka beddelka iyo viscosity.Marka lagu daro farqiga u dhexeeya viscosity, noocyada hydroxyethyl cellulose waxaa loo qaybin karaa nooca milanka caadiga ah, nooca degdega ah iyo nooca xasiloonida noolaha iyada oo loo marayo wax ka beddelka habka wax soo saarka.Ilaa hadda sida habka loo isticmaalo, hydroxyethyl cellulose waxaa lagu dari karaa marxalado kala duwan ee habka wax soo saarka daahan.Nooca degdega ah ee degdega ah ayaa si toos ah loogu dari karaa qaabka budada qalalan, laakiin qiimaha pH ee nidaamka ka hor inta aan lagu darin waa in uu ka yar yahay 7, inta badan sababtoo ah hydroxyethyl cellulose ayaa si tartiib ah u milma qiimaha pH hoose, waxaana jira waqti ku filan biyaha si ay u galaan gudaha qaybta , ka dibna kordhiyaan qiimaha pH si ay uga dhigaan inay si degdeg ah u milmaan.Tallaabooyinka u dhigma ayaa sidoo kale loo isticmaali karaa si loo diyaariyo xoogag gaar ah oo xabag ah oo lagu daro nidaamka rinjiga.
2. Hydroxypropyl Methyl Cellulose
Saamaynta dhumucda ee hydroxypropyl methylcellulose asal ahaan waa la mid ah kan hydroxyethylcellulose, taas oo ah, si loo kordhiyo viscosity ee daahan heerka dhogorta hoose iyo dhexdhexaad ah.Hydroxypropyl methylcellulose waxay u adkaysataa xaalufka enzymatic, laakiin milmayntiisa biyuhu uma fiicna sida kan hydroxyethyl cellulose, waxayna leedahay faa'iido darrooyinka jeelka marka la kululeeyo.Hydroxypropyl methylcellulose oogada lagu daaweeyay, si toos ah ayaa loogu dari karaa biyaha marka la isticmaalo, ka dib marka la walaaqo oo la kala firdhiyo, ku dar walxaha alkaline sida biyaha ammonia, ku hagaaji qiimaha pH ilaa 8-9, oo walaaq ilaa si buuxda loo kala diro.Hydroxypropyl methylcellulose iyada oo aan la daaweyn dusha sare, waa la qooyay oo lagu barari karaa biyo kulul oo ka sarreeya 85 ° C ka hor inta aan la isticmaalin, ka dibna la qaboojiyo heerkulka qolka, ka dibna lagu walaaqo biyo qabow ama biyo baraf ah si ay si buuxda u milmaan.
3. Methyl cellulose
Methylcellulose waxay leedahay sifooyin la mid ah hydroxypropylmethylcellulose, laakiin way ka xasilloon tahay viscosity-ka heerkulka.
Hydroxyethyl cellulose waa dhumucda loogu isticmaalka badan yahay rinjiga cinjirka, waxaana loo isticmaalaa rinji sare, dhexe iyo hoose iyo rinji dhisme qaro weyn leh.Si ballaaran loo isticmaalo dhumucda rinjiga caadiga ah ee cinjirka, rinjiga kaalshiyamka cawl budada cinjirka, iwm. Midda labaad waa hydroxypropyl methylcellulose, kaas oo sidoo kale loo isticmaalo in qadar gaar ah ay sabab u tahay horumarinta soo saarayaasha.Methyl cellulose si dhib leh looma isticmaalo rinjiga cinjirka ah, laakiin waxaa si weyn loogu isticmaalaa gudaha budada ah ee gudaha iyo dibadda derbiga sababtoo ah kala diris degdeg ah iyo haynta biyaha wanaagsan.methyl cellulose-viscosity-sare wuxuu siin karaa suufka leh thixotropy aad u fiican iyo xajinta biyaha, taasoo ka dhigaysa inay leedahay sifooyin xoqan oo wanaagsan.
Waqtiga boostada: Jan-03-2023