Ifafaalaha hoos u dhaca viscosity inta lagu jiro kaydinta rinjiga waa dhibaato caadi ah, gaar ahaan ka dib kaydinta muddada dheer, mawjada rinjiga ayaa si weyn hoos ugu dhacaysa, saameynaysa waxqabadka dhismaha iyo tayada alaabta. Hoos-u-dhaca viscosity-ku wuxuu la xidhiidhaa arrimo badan, sida heerkulka, qoyaanka, qallafsanaanta dareeraha, xaalufka polymer, iwm., laakiin dhexgalka eter-ka dhumucda cellulose ayaa si gaar ah muhiim u ah.
1. Doorka aasaasiga ah ee ether cellulose
Eter cellulose waa dhumuc caadi ah oo si ballaaran loogu isticmaalo rinjiyada biyaha ku salaysan. Shaqooyinkooda ugu waaweyn waxaa ka mid ah:
Saamaynta dhumucda: ether Cellulose samayn kartaa qaab-dhismeedka shabakad saddex-cabbir ah barar by nuuga biyaha, taas oo kordhinaysa viscosity ee nidaamka iyo hagaajinta thixotropy iyo waxqabadka dhismaha ee rinjiga.
Saamaynta xasilinta joojinta: Eter cellulose waxay si wax ku ool ah uga hortagi kartaa kala-soocidda walxaha adag sida midabada iyo buuxinta rinjiga waxayna ilaalinaysaa isku-duubnaanta rinjiga.
Hanti-samaynta filimka: Cellulose ether waxay sidoo kale saameyn kartaa hantida samaynta filimka ee rinjiga, samaynta dahaarka ayaa leh adkeyn iyo adkeysi gaar ah.
Waxaa jira noocyo badan oo ethers cellulose, oo ay ku jiraan methyl cellulose (MC), hydroxyethyl cellulose (HEC), hydroxypropyl methyl cellulose (HPMC), iwm. Qalabkani waxay leeyihiin milmayn kala duwan, awoodda dhumuc iyo caabbinta kaydinta ee daahan.
2. Sababaha ugu waaweyn ee dhimista viscosity
Inta lagu jiro kaydinta dahaarka, dhimista viscosity waxaa inta badan sababa sababaha soo socda:
(1) Hoos-u-dhac ku yimaada ether-ka cellulose
Saamaynta dhumucda ethers cellulose ee dahaarka waxay ku xiran tahay xajmiga miisaankooda kelli iyo daacadnimada qaab dhismeedka molecular. Inta lagu jiro kaydinta, arrimaha sida heerkulka, aysidhka iyo alkalinity, iyo microorganisms waxay keeni karaan nabaad-guurka ethers cellulose. Tusaale ahaan, inta lagu jiro kaydinta muddada-dheer, qaybaha acidic ama alkaline ee daahan ayaa laga yaabaa inay hydrolyze silsiladda kelli ee ether cellulose, hoos u dhigi miisaankeeda kelli, oo sidaas darteed daciifin saamaynta dhumucdiisuna, taasoo keentay in hoos u viscosity.
(2) Kacsanaanta iyo guuritaanka qoyaanka
Kacsanaanta dareeraha ama guuritaanka qoyaanka ee dahaarka ayaa laga yaabaa inay saameeyaan xaaladda milanka ee etherka cellulose. Inta lagu jiro kaydinta, qayb ka mid ah biyaha ayaa laga yaabaa inay uumi baxaan ama u haajiraan dusha sare ee daahan, taasoo ka dhigaysa qaybinta biyaha daahan oo aan sinnayn, taas oo saameynaysa heerka bararka etherka cellulose oo keenaya hoos u dhaca viscosity ee meelaha maxalliga ah.
(3) Weerar microbial ah
Koritaanka microbial waxaa laga yaabaa inay ku dhacdo daaha marka si aan habooneyn loo kaydiyo ama waxyaabaha ilaaliya ay noqdaan kuwo aan waxtar lahayn. Microorganisms-ku waxay dumin karaan ether-ka cellulose iyo dhumucyada kale ee organic, daciifinta saameyntooda dhumucdooda waxayna keenaysaa mawduuca dahaarka inuu hoos u dhaco. Dahaarka biyaha ku salaysan, gaar ahaan, waa jawi wanaagsan oo koritaanka microbial sababtoo ah waxay ka kooban yihiin xaddi badan oo biyo ah.
(4) Gabowga heerkulka sare
Marka la eego xaaladaha kaydinta heerkulka sare, qaabdhismeedka jidheed ama kiimikaad ee silsiladda molecular ether cellulose way isbedeli kartaa. Tusaale ahaan, ether-ka cellulose waxay u nugul yihiin oksaydhka ama pyrolysis heerkulka sare, taasoo keentay daciifinta saameynta dhumucda. Heerkulka sare waxa uu sidoo kale dedejiyaa is bedbeddelka dareeraha iyo uumi-baxa biyaha, taas oo sii saamaynaysa xasilloonida viscosity.
3. Hababka lagu hagaajinayo xasilloonida kaydinta dahaarka
Si loo yareeyo hoos u dhaca viscosity inta lagu jiro kaydinta loona kordhiyo nolosha kaydinta daahan, tallaabooyinka soo socda ayaa la qaadi karaa:
(1) Doorashada ether cellulose saxda ah
Noocyada kala duwan ee ethers cellulose waxay leeyihiin waxqabadyo kala duwan marka loo eego xasilloonida kaydinta. Ether-yada Cellulose ee leh miisaanka kelliga sare guud ahaan waxay leeyihiin saamayn dhumuc wanaagsan, laakiin xasiloonida kaydintoodu aad bay u liidataa, halka ether-ka cellulose ee miisaankoodu hooseeyo ay yeelan karaan waxqabad kayd oo wanaagsan. Sidaa darteed, marka la naqshadeynayo caanaha, ethers cellulose leh xasilloonida kaydinta wanaagsan waa in la doortaa, ama ethers cellulose waa in lagu daraa dhumucyada kale si loo hagaajiyo caabbinta kaydinta.
(2) Xakamee pH ee daahan
Aashitada iyo alkalinity ee nidaamka daahan ayaa saameyn muhiim ah ku leh xasiloonida ethers cellulose. Naqshadeynta qaabeynta, qiimaha pH ee dahaarka waa in la xakameeyaa si looga fogaado jawi aad u acidic ama alkaline ah si loo yareeyo nabaad-guurka ethers cellulose. Isla mar ahaantaana, ku darida qaddarka habboon ee hagaajinta pH ama kaydinta ayaa kaa caawin karta xasilinta pH ee nidaamka.
(3) Kordhi isticmaalka waxyaalaha lagu ilaaliyo
Si looga hortago nabaad-guurka microbial, qadar habboon oo ah ilaalinta waa in lagu daraa dahaarka. Ilaaliyeyaasha waxay xakameyn karaan koritaanka noolaha, taas oo ka hortagaysa walxaha organic sida ether cellulose si ay u jajabaan oo ay u ilaaliyaan xasilloonida daaha. Waxyaalaha ilaalinta ku habboon waa in lagu doortaa iyadoo loo eegayo qaabaynta dahaarka iyo deegaanka kaydinta, iyo waxtarkooda si joogto ah loo hubiyo.
(4) Xakamee deegaanka kaydinta
Heerkulka kaydinta iyo qoyaanka dahaarka ayaa saameyn toos ah ku leh xasilloonida viscosity. Daahan waa in lagu kaydiyaa meel qalalan oo qabow, iyada oo laga fogaanayo heerkulka sare iyo xaaladaha qoyaanka sare si loo yareeyo isbeddelka dareeraha iyo xaalufka ether-ka cellulose. Intaa waxaa dheer, baakadaha si fiican loo xiray ayaa si wax ku ool ah u yareyn kara socdaalka iyo uumiga biyaha iyo dib u dhigista hoos u dhaca viscosity.
4. Arrimaha kale ee saameeya viscosity
Marka lagu daro ethers cellulose, qaybaha kale ee nidaamka daahan ayaa sidoo kale saameyn kara isbeddelka viscosity. Tusaale ahaan, nooca iyo xoojinta midabada, heerka isbedbedelka dareerayaasha, iyo iswaafajinta dhumucyada kale ama kala firdhiyaasheeda ayaa laga yaabaa inay saameyn ku yeelato xasilloonida viscosity ee dahaarka. Sidaa darteed, naqshadda guud ee caanaha dahaarka iyo isdhexgalka ka dhexeeya qaybaha ayaa sidoo kale ah qodobbo muhiim ah oo u baahan in fiiro gaar ah loo yeesho.
Hoos-u-dhaca viscosity inta lagu jiro kaydinta dahaarka waxay si dhow ula xiriirtaa arrimo ay ka mid yihiin xaalufka ethers cellulose, qallafsanaanta dareeraha, iyo socdaalka biyaha. Si loo hagaajiyo xasilloonida kaydinta dahaarka, noocyada ether cellulose ee ku habboon waa in la doortaa, pH ee daboolka waa in la xakameeyaa, tallaabooyinka ka hortagga daxalka waa in la xoojiyaa, iyo deegaanka kaydinta waa in la hagaajiyaa. Iyada oo loo marayo naqshadaynta caanaha macquulka ah iyo maaraynta kaydinta wanaagsan, dhibaatada yaraanta viscosity inta lagu jiro kaydinta daahan ayaa si wax ku ool ah loo dhimi karaa, iyo waxqabadka badeecada iyo tartanka suuqa waa la hagaajin karaa.
Waqtiga post: Seb-27-2024