Qaababka rinjiga, hydroxyethyl cellulose (HEC) waa dhumuc caadi ah iyo beddele rheology kaas oo wanaajin kara xasilloonida kaydinta, sinnaanta iyo sifooyinka dhismaha rinjiga. Si loogu daro hydroxyethyl cellulose rinji oo loo hubiyo in ay si wax ku ool ah u shaqeyso, tillaabooyin iyo taxadaro gaar ah ayaa loo baahan yahay in la raaco. Habka gaarka ah waa sida soo socota:
1. Astaamaha hydroxyethyl cellulose
Hydroxyethyl cellulose waa polymer aan-ionic biyo-milmi leh oo leh dhumuc aad u fiican, filim samaynta, biyo-hayntiisa, ganaax iyo sifooyin emulsifying. Waxaa caadi ahaan loo isticmaalaa rinjiyada biyaha ku salaysan, xabagta, ceramics, khadadka iyo alaabada kale. Waxaa lagu helaa iyada oo lagu beddelayo qayb ka mid ah kooxaha hydroxyl ee silsiladda molecular cellulose ee kooxaha hydroxyethyl, sidaas darteed waxay leedahay milmayn biyaha wanaagsan.
Hawlaha ugu muhiimsan ee HEC ee rinji waa:
Saamaynta dhumucda: Kordhi viscosity ee rinjiga, ka ilaali rinjiga in uu hoos u dhaco, oo ka dhig inuu leeyahay sifooyin dhisme oo aad u fiican.
Saamaynta joojinta: Waxay si siman u kala firdhi kartaa oo dejin kartaa qaybo adag sida midabada iyo buuxinta si looga ilaaliyo inay deggaan.
Saamaynta haynta biyaha: Kor u qaad haynta biyaha ee filimka daahan, kordhi wakhtiga furan, oo wanaaji saamaynta qoynta ee rinjiga.
Xakamaynta rheology: hagaajin dareeraha iyo heerka dahaarka, oo hagaaji dhibaatada calaamadda burushka inta lagu jiro dhismaha.
2. Tallaabooyinka kordhinta ee hydroxyethyl cellulose
Talaabada kala dirista ka hor Hawlgalka dhabta ah, hydroxyethyl cellulose wuxuu u baahan yahay in si siman loo kala firdhiyo oo lagu milo iyada oo loo marayo habka kala dirida ka hor. Si loo hubiyo in cellulose ay si buuxda u ciyaari karto doorkeeda, waxaa badanaa lagu talinayaa in lagu milo biyaha marka hore, halkii si toos ah loogu dari lahaa daaha. Tallaabooyinka gaarka ah waa sida soo socota:
Dooro dareere ku habboon: sida caadiga ah biyaha deionized ayaa loo isticmaalaa sida dareeraha. Haddii ay jiraan dareerayaal kale oo dabiici ah oo ku jira nidaamka daahan, xaaladaha kala diriddu waxay u baahan yihiin in la hagaajiyo si waafaqsan sifooyinka dareeraha.
Si tartiib ah u saydh saydhaa hydroxyethyl cellulose: Si tartiib ah oo siman ku rusheeya budada hydroxyethyl cellulose adigoo walaaqaya biyaha si aad uga hortagto aglomeration. Xawaaraha kicinta waa inuu ahaadaa mid gaabis ah si looga fogaado hoos u dhigista heerka kala dirida cellulose ama samaynta "colloids" sababtoo ah xoogga xiirid xad-dhaaf ah.
Kala dirida taagan: Ka dib marka lagu rusheeyo hydroxyethyl cellulose, waxay u baahan tahay in loo daayo si ay u istaagto muddo wakhti ah (badanaa 30 daqiiqo ilaa dhowr saacadood) si loo hubiyo in cellulose uu si buuxda u bararay oo lagu milmo biyaha. Waqtiga kala diriddu waxay ku xiran tahay nooca cellulose, heerkulka dareeraha iyo xaaladaha walaaqaya.
Hagaajin heerkulka kala dirida: Kordhinta heerkulka waxay gacan ka geysaneysaa dardargelinta habka kala dirida hydroxyethyl cellulose. Inta badan waxaa lagu talinayaa in la xakameeyo heerkulka xal u dhexeeya 20 ℃-40 ℃. Heerkulka aadka u sarreeya wuxuu keeni karaa xaalufka cellulose ama xalalka oo xumaada.
Hagaajinta qiimaha pH ee xalka milanka hydroxyethyl cellulose wuxuu si dhow ula xiriiraa qiimaha pH ee xalka. Caadi ahaan waxay si fiican ugu milmi kartaa xaaladaha dhexdhexaadka ah ama waxoogaa alkaline ah, iyadoo qiimaha pH u dhexeeya 6-8. Inta lagu jiro habka kala dirida, qiimaha pH waxaa lagu hagaajin karaa iyadoo lagu darayo ammonia ama walxaha kale ee alkaline haddii loo baahdo.
Ku darista xalka hydroxyethyl cellulose ee nidaamka dahaarka Kadib kala dirida, ku dar xalka daboolka. Inta lagu jiro habka wax-ku-kordhinta, waa in si tartiib ah loogu daro oo si joogto ah loo walaaqaa si loo hubiyo isku-dhafka ku filan ee matrixka daahan. Inta lagu jiro habka isku dhafka ah, waxaa lagama maarmaan ah in la doorto xawaaraha kicinta ee ku habboon iyadoo loo eegayo nidaamyada kala duwan si looga hortago nidaamka xumbo ama hoos u dhaca cellulose sababtoo ah xoogga xad-dhaafka ah.
Hagaajinta viscosity Kadib marka lagu daro hydroxyethyl cellulose, viscosity ee dahaarka waxaa lagu xakameyn karaa iyadoo la hagaajinayo qadarka lagu daray. Guud ahaan, caddadka cellulose hydroxyethyl ee la isticmaalo waa inta u dhaxaysa 0.3% -1.0% (marka loo eego miisaanka guud ee daahan), iyo qadarka gaarka ah ee lagu daray waxay u baahan tahay in si tijaabo ah loo hagaajiyo iyada oo la raacayo shuruudaha samaynta ee daahan. Qadar aad u sarreeya oo lagu daro waxay keeni kartaa in dahaarka uu yeesho viscosity aad u sarreeya iyo dareere liidata, saameynaya waxqabadka dhismaha; halka isku-darka aan ku filnayn laga yaabo inay awoodi waayaan inay ciyaaraan doorka dhumucda iyo ka joojinta.
Samee imtixaanada xasiloonida heerka iyo kaydinta Ka dib markii lagu daro hydroxyethyl cellulose iyo hagaajinta qaacidada daahan, waxqabadka dhismaha daahan ayaa u baahan in la tijaabiyo, oo ay ku jiraan heerka, sag, xakamaynta calaamadda burushka, iwm Isla mar ahaantaana, tijaabada xasiloonida kaydinta daahan ayaa sidoo kale loo baahan yahay u fiirso sedimentation ee daahan ka dib markii ay istaageen muddo wakhti ah, isbedel viscosity, iwm, si loo qiimeeyo xasiloonida hydroxyethyl cellulose.
3. taxaddar
Ka-hortagga agglomeration: Inta lagu jiro habka kala dirida, hydroxyethyl cellulose aad bay u fududahay in la nuugo biyaha iyo bararka, sidaas darteed waxay u baahan tahay in lagu rusheeyaa biyaha si tartiib ah oo loo hubiyo walaaq ku filan si looga hortago samaynta burooyinka. Tani waa isku xirka muhiimka ah ee hawlgalka, haddii kale waxay saameyn kartaa heerka kala dirida iyo labisnaanta.
Ka fogow xoog-xiirid sare: Markaad ku darto cellulose, xawaaraha kicinta waa inuusan aad u sarreyn si looga fogaado waxyeellada silsiladda unugyada unugyada unugyada sababtoo ah xoogga xiirid xad-dhaaf ah, taasoo keentay hoos u dhac ku yimaada waxqabadkiisa dhumucdiisuna. Intaa waxaa dheer, wax soo saarka daahan dambe, isticmaalka qalabka sare ee dhogorta waa in sidoo kale laga fogaadaa sida ugu macquulsan.
Xakamee heerkulka kala dirida: Marka la milmo hydroxyethyl cellulose, heerkulka biyuhu waa inaanu aad u sareyn. Waxaa guud ahaan lagu talinayaa in la xakameeyo at 20 ℃-40 ℃. Marka la eego xaaladaha heerkulka sare, cellulose waxaa laga yaabaa inay hoos u dhacdo, taasoo keentay hoos u dhac ku yimaada saameyntiisa dhumucdiisuna iyo viscosity.
Kaydinta Xalka: Xalalka Hydroxyethyl cellulose guud ahaan waxay u baahan yihiin in la diyaariyo oo isla markiiba la isticmaalo. Kaydinta muddada-dheer waxay saameyn doontaa viscossitykeeda iyo xasilloonida. Badanaa waxaa lagu talinayaa in la diyaariyo xalka loo baahan yahay maalinta wax soo saarka rinjiga si loo ilaaliyo waxqabadkeeda ugu fiican.
Ku darida hydroxyethyl cellulose ee rinjiga ma aha oo kaliya habka isku-dhafka jirka ee fudud, laakiin sidoo kale waxay u baahan tahay in lagu daro shuruudaha habka dhabta ah iyo qeexitaannada hawlgalka si loo hubiyo in dhumucdeeda, ka joojinta iyo hantida biyaha lagu hayo si buuxda loo isticmaalo. Inta lagu jiro habka isku-darka, fiiro gaar ah u yeelo tallaabada hore ee burburinta, xakamaynta heerkulka kala dirida iyo qiimaha pH, iyo isku-dhafka buuxa ka dib marka lagu daro. Faahfaahintaasi waxay si toos ah u saameyn doontaa tayada iyo xasiloonida waxqabadka rinjiga.
Waqtiga post: Seb-19-2024