Cellulose ether ke tlatsetso e tloaelehileng ea thepa ea moaho, e sebelisetsoang ho ntlafatsa ts'ebetso ea kaho le thepa ea mochini ea seretse. Bokhabane ke e 'ngoe ea litšobotsi tsa bohlokoa tsa cellulose ether, e bolelang kabo ea boholo ba likaroloana tsa eona.
Litšobotsi le ts'ebeliso ea cellulose ether
Cellulose ether haholo-holo e kenyelletsa hydroxypropyl methylcellulose (HPMC), hydroxyethyl cellulose (HEC), joalo-joalo. Mesebetsi ea bona ea mantlha ea ho haha seretse e kenyelletsa:
Ho boloka metsi: ka ho fokotsa mouoane oa metsi, ho lelefatsa nako ea hydration ea samente, le ho matlafatsa matla a seretse.
Thickening: Eketsa viscosity ea seretse le ho ntlafatsa tshebetso ya kaho.
Ntlafatsa khanyetso ea crack: Thepa ea ho boloka metsi ea cellulose ether e thusa ho laola ho honyela ha samente, ka hona ho fokotsa ho hlaha ha mapetsong a seretse.
The fineness ea cellulose ether e ama dispersibility ea eona, solubility le bokgoni ba seretse, ka tsela eo ama tshebetso kakaretso ea seretse.
Setlamo sa cellulose ether fineness ho matla a seretse se ka hlahlojoa ho tsoa likarolo tse latelang:
1. Sekhahla sa ho qhalana le ho qhalana
Sekhahla sa ho qhibiliha ha cellulose ether metsing se amana haufi-ufi le botle ba eona. Likaroloana tsa ether tsa cellulose tse nang le botle bo phahameng li qhibiliha habonolo ka metsing, kahoo li etsa phallo e tšoanang kapele. Kabo ena e tšoanang e ka etsa bonnete ba ho boloka metsi a tsitsitseng le ho teteana tsamaisong eohle ea seretse, ho khothaletsa tsoelo-pele e ts'oanang ea karabelo ea samente ea hydration, le ho ntlafatsa matla a pele a seretse.
2. Bokhoni ba ho boloka metsi
Bokhabane ba cellulose ether bo ama ts'ebetso ea eona ea ho boloka metsi. Likaroloana tsa ether tsa cellulose tse nang le botle bo phahameng li fana ka sebaka se seholoanyane se ikhethileng, ka hona se theha meaho e mengata e bolokang metsi ka har'a seretse. Li-micropores tsena li ka boloka metsi ka mokhoa o atlehileng haholoanyane, tsa lelefatsa nako ea karabelo ea samente hydration, tsa khothaletsa sebopeho sa lihlahisoa tsa hydration, ka hona, tsa matlafatsa matla a seretse.
3. Tlamahano ea li-interface
Ka lebaka la dispersibility ea bona e ntle, likaroloana tsa cellulose ether tse nang le boleng bo phahameng bo ka etsa lera le ts'oanang la ho kopanya pakeng tsa seretse le kakaretso, le ho ntlafatsa khokahanyo ea seretse. Phello ena e thusa seretse ho boloka polasetiki e ntle qalong, ho fokotsa ho hlaha ha mapheo a shrinkage, kahoo ho ntlafatsa matla a kakaretso.
4. Khothaletso ea hydration ea samente
Nakong ea ts'ebetso ea samente ea hydration, ho thehoa ha lihlahisoa tsa hydration ho hloka palo e itseng ea metsi. Cellulose ether e nang le fineness e phahameng e ka theha maemo a ts'oanang a hydration ka seretse, ho qoba bothata ba mongobo o sa lekaneng kapa o feteletseng oa sebaka seo, ho netefatsa tsoelo-pele e feletseng ea karabelo ea hydration, 'me kahoo e ntlafatsa matla a seretse.
Boithuto ba liteko le tlhahlobo ea sephetho
E le ho netefatsa phello ea cellulose ether fineness holim'a matla a seretse, liphuputso tse ling tsa liteko li ile tsa lokisa botle ba cellulose ether 'me tsa leka mekhoa ea eona ea mochini oa seretse tlas'a likarolo tse fapaneng.
Moqapi oa liteko
Teko hangata e sebelisa lisampole tsa cellulose ether ea li-fineness tse fapaneng ebe li li kenya seretseng sa samente ka ho latellana. Ka ho laola mefuta e meng e fapaneng (e kang karo-karolelano ea samente ea metsi, karo-karolelano ea kakaretso, nako ea ho kopanya, joalo-joalo), ho fetoloa feela botle ba cellulose ether. Letoto la liteko tsa matla, ho kenyelletsa le matla a hatellang le matla a ho feto-fetoha, ebe lia etsoa.
Hangata liphetho tsa liteko li bontša:
Mehlala ea cellulose ether e nang le fineness e phahameng e ka ntlafatsa haholo matla a khatello le matla a flexural a seretse qalong (joalo ka matsatsi a 3 le matsatsi a 7).
Ka ho atolosoa ha nako ea ho phekola (joalo ka matsatsi a 28), cellulose ether e nang le fineness e phahameng e ka tsoela pele ho fana ka ho boloka metsi hantle le ho kopanya, ho bontša kholo e tsitsitseng ea matla.
Ka mohlala, tekong, matla a hatellang a cellulose ethers a nang le fineness ea 80 mesh, 100 mesh, le 120 mesh ka matsatsi a 28 e ne e le 25 MPa, 28 MPa, le 30 MPa, ka ho latellana. Sena se bontša hore ha boleng ba cellulose ether bo phahame, matla a ho hatella a seretse a eketseha.
Ts'ebeliso e sebetsang ea optimization ea cellulose ether
1. Fetola ho ea ka tikoloho ea kaho
Ha ho hahoa sebakeng se omeletseng kapa tlas'a maemo a mocheso o phahameng, cellulose ether e nang le fineness e phahameng e ka khethoa ho matlafatsa ho boloka metsi a seretse le ho fokotsa tahlehelo ea matla e bakoang ke mouoane oa metsi.
2. Sebelisa le li-additives tse ling
Cellulose ether e nang le fineness e phahameng e ka sebelisoa hammoho le li-additives tse ling (tse kang li-conductions tsa metsi le li-air entraining agents) ho ntlafatsa ts'ebetso ea seretse ho ea pele. Ka mohlala, tšebeliso ea lisebelisoa tsa metsi e ka fokotsa karo-karolelano ea samente ea metsi le ho eketsa bongata ba seretse, ha cellulose ether e fana ka ho boloka metsi le liphello tse matlafatsang. Ho kopana ha tse peli ho ka ntlafatsa haholo matla a seretse.
3. Ntlafatso ea ts'ebetso ea kaho
Nakong ea ts'ebetso ea kaho, hoa hlokahala ho etsa bonnete ba hore cellulose ether e qhibiliha ka ho feletseng le ho qhalana. Sena se ka finyelloa ka ho eketsa nako ea ho kopanya kapa ho sebelisa lisebelisoa tse loketseng tsa ho kopanya ho netefatsa hore molemo oa fineness oa cellulose ether o sebelisoa ka botlalo.
Bokhabane ba cellulose ether bo na le phello e kholo ho matla a seretse. Cellulose ether e nang le fineness e phahameng e ka bapala karolo e ntle ea ho boloka metsi, ho tiisa le ho ntlafatsa li-interface, le ho ntlafatsa matla a pele le thepa ea nako e telele ea seretse. Lits'ebetsong tse sebetsang, botle ba cellulose ether bo lokela ho khethoa ka mokhoa o utloahalang le ho sebelisoa ho latela maemo a khethehileng a kaho le litlhoko tsa ho ntlafatsa ts'ebetso ea seretse le ho ntlafatsa boleng ba projeke.
Nako ea poso: Jun-24-2024