Ts'ebetso ea lihlahisoa tsa HPMC
Ts'ebetso ea Tlhahiso eaHydroxypropypropyLese (HPMC)e kenyelletsa letoto le letoto la lik'hemik'hale, morero le mocheso oa motlakase. Ts'ebetso e qala ka cellular ea raw ho likhoele tsa tlhaho le ho phethela ka tlhahiso ea phofo e ntle, e omileng e loketseng lits'ebetso tse fapaneng. Tlhaloso ena e qaqileng e akaretsa mohato o mong le o mong ts'ebetsong ea tlhahiso ea HPMC, ho kenyelletsa le karohano ea methati ea bohlokoa, lisebelisoa tsa taolo ea boleng bo tala.
Kenyelletso ea lihlahisoa tsa HPMC
Hydroxypropypropinyl methylcell(HPMC) ke Ether ether ea Cellulo Re sebelisoa lits'ebetsong tse fapaneng Litsi tsa eona tse ikhethang li kenyelletsa ho boloka metsi, bokhoni ba ho etsa lifilimi, liketsahalo tse phahameng li na le boiketlo ba eona.
HPMC e bōpiloe ke ho lekanya cellulose, polymer ea tlhaho e ntšitsoeng likhoele tsa limela. Ka ts'ebetso ea li-avtation, lihlopha tse ikhethang tse sebetsang-MethylMmehydroxypropylKa lebaka la lihlopha tsa limolek'hule tsa cellulose li kenngoe limolek'hule tsa cellulose, ka tsela eo li hara thepa ea eona ea lik'hemik'hale le lik'hemik'hale. Likhatiso tsena li fana ka litšobotsi tse lakatsehang joaloka qubu ea metsi, phallo e ntlafalitsoeng, le thepa ea litloholo ho sehlahisoa.
Likarolo tse latelang li fana ka karohano e qaqileng ea mehato e kenyelletsang ho hlophisoa ha HPMC, e koahela litokelo tsa lik'hemik'hale, lits'ebetso tsa kamorao.
1. Litokisetso tsa lintho tse lekaneng
Lintho tsa mantlha tsa tlhahiso ea HPMC keCellulose, e leng e neng e tsoa ho likhoele tsa li-bale Clyulose e tlameha ho ba letoto la kalafo ho tlosa litšila le ho li pheha bakeng sa ts'ebetso ea litheolelo. Sena se tiisa hore cellulose e hloekile ebile e sebetsa.
1.1. Moputso le tlhoekiso ea cellulose
| Mohato | Ts'ebetso | Lintlha |
|---|---|---|
| Khoebo ea Cellulose | Fumana cllulose ho tsoa likhoele tsa tlhaho, joalo ka li-pulp tsa lehong kapa linetory linces. | Cliddlese e lokela ho ba le bohloeki bo phahameng ho netefatsa boleng bo botle ba hpmc. |
| Tlhoekiso | Tlosa likarolo tseo e seng tsa confoulose, tse kang Lignlin le Hemicellilose, ba sebelisa kalafo ea Alkali. | Ka tloaelo, sodium hydroxide (Naoh) kapa potasiamo hydroxide (Koh) e sebelisetsoa ho qhibiliha hemicelll le Lignin. |
| Ho hlatsoa | Rinse ka metsi ho tlosa lik'hemik'hale tse setseng. | Ruinsing e tlosa Alkali e fetelletseng ea Alkali le liphoso tse ling ho netefatsa hore cellulose e hloekile. |
Likhoele tsa likhoele tsa cellulose li sebetsoa 'me li omme ho fihlela litaba tse khethehileng tsa mongobo, tse bohlokoa ka mehato e latelang.
1.2. Pre-kalafo le alkali
Likhoele tsa likhoele li tšoaroa ka kutloano ea sodium. Sena se bitsoaPhekolo ea Alkali or ts'ebetso, 'me ke mohato o nyatsang ts'ebetsong.
| Mohato | Ts'ebetso | Lintlha |
|---|---|---|
| Ts'ebetso ea Alkali | Sesebelisoa sa clllulose se kolobisitsoe ka tharollo ea alkaline (Naoh) bakeng sa lihora tse 'maloa ka mocheso o phahameng. | Tharollo ea alkana e hulanya selefounu, e e etsa hore e be le molemo o mongata bakeng sa ts'ebetso ea litheolelo. |
| Boemo | Kamora kalafo, motsoako o tloheloa hore o phomole lihora tse 'maloa kapa matsatsi. | Sena se lumella likhoele tsa cellulose ho tsitsisa le ho netefatsa ho tšoana le mohato o latelang. |
2. Ts'ebetso ea Etherization
Phallo ke ts'ebetso eo Cellulose e neng e lula le eonaMethyl chloride (Ch,000l)Mmepropylene oxide (C₃h₆o)Ho hlahisa Methyl (Ch₃) le Hydroxypropypropyl (coeh₆uh) lihlopha, phetoho ea cll kapa cellulose hoHydroxypropypropyLese (HPMC).
Ena ke sethala ka ho fetisisa sa tlhahiso ea HPMC, joalo ka ha se etsa qeto ea boleng le lihlahisoa tsa sehlahisoa sa ho qetela.
2.1. Methylation (Methyl Grouplus)
Metsoako ea cellulose e qala kaMethyl chlorideboteng ba motheo (hangata sodium hydroxide, Naoh), e hlahisang lihlopha tsa methyl (-ch₃) ho tsoa sebopeho sa cellulose.
| Mohato | Ts'ebetso | Lintlha |
|---|---|---|
| Methylation | Celluloulose e arabeloa ka lithyl chlonide (ChNalcl) ho boteng ba Naoh. | Karabelo e hlahisa lihlopha tsa methyl (-ch₃) liketsaneng tsa khoele. Mefuta enaMethylcellllll (MC)e le bohareng. |
| Taolo ea karabelo | Karabelo e laoloa ka hloko ho ea ka mocheso (30-50 ° C) le nako. | Mocheso o phahameng haholo o ka baka karabelo e sa batleheng, ha tlase mocheso o ka fokotsa tekanyo ea sebaka. |
Palo ea methylation e khetholladegree of Singlution (DS), e amang tharollo le pono ea sehlahisoa sa ho qetela.
2.2. Tlanya ea hydroxypropypropyl)
Ka nako eo Cellulose e felisitsoe kapropylene oxide (C₃h₆o)ho hlahisaLihlopha tsa HydroxyproPyL (-c₃h₆oh), e fang maqheka a eona a HPMC e khethollang litšobotsi tse kang qubu ea metsi le pono.
| Mohato | Ts'ebetso | Lintlha |
|---|---|---|
| Hydropypropylation | Cllulose e nang le methylase e nang le methylase e phekoloa ka oxide ea inthanete tlasa maemo a laoloang. | Mefuta ea karabeloHydroxypropypropyLese (HPMC). |
| Catalysis | Sodium hydroxide kapa sodium carbonate e sebelisoa e le kananelo. | Mobu oa motheo oa thusa ts'ebetsong ea poiti ea popuo ea popyone bakeng sa karabelo. |
Tekanyo ea sebaka sa Hydroxypropyl e boetse e ama thepa ea ho qetela ea HPMC, e kang pono, e nang le bokhoni ba ho theha lifilimi.
2.3. Taolo ea Boitšoaro ba Etheright
Boitšoaro ba naperiwation hangata bo etsoa kaSekepe sa RecacleTlas'aMocheso o laoloang le khatello. Maemo a tloaelehileng a tjena:
| Paramente | Maemo |
|---|---|
| Mocheso | 30 ° C ho 60 ° C |
| Khatello | Sepakapaka kapa khatello e phahameng hanyane |
| Nako ea karabelo | Lihora tse 3 ho isa ho tse 6, ho latela tekanyo e lakatsehang |
Karabelo e lokela ho laoloa ka hloko ho netefatsa phather e tšoanang mme e qobe lintho tse sa phethahalang.
3. Neangary le ho hlatsoa
Kamora ts'ebetso ea phatlalatso, motsoako oa karabelo o na le alkali e fetang ea alkali le lik'hemik'hale tse sa bonahaleng. Tsena li hloka ho nke lehlakore li sa nke lehlakore 'me li tlosoe ho netefatsa hore sehlahisoa sa HPMC se bolokehile, se hloekileng, hape se kopa likhakanyo.
3.1. Ho se nke lehlakore
| Mohato | Ts'ebetso | Lintlha |
|---|---|---|
| Ho se nke lehlakore | Kenya asiti e fokolang, e kang hydrochloric acid (hcl), ho khelosa bajaki ba bangata. | Acid o sitisa likarolo life kapa life tse setseng tsa alkanine. |
| Taolo ea PH | Etsa bonnete ba hore ph ea motsoako o sa nke lehlakore (PH 7) pele u tsoela pele mohatong o latelang. | Ho se nke lehlakore ho thusa ho qoba litaba le botsitso ba sehlahisoa sa ho qetela. |
3.2. Ho hlatsoa
| Mohato | Ts'ebetso | Lintlha |
|---|---|---|
| Ho hlatsoa | Hlatsoa motsoako o sa nke lehlakore ka metsi. | Liea tse ngata li ka kopuoa ho tlosa lik'hemik'hale tsohle tse setseng le lihlahisoa tse ngata. |
| Tlhoekiso | Sehlahisoa se hloekisoa ho tlosa likaroloana kapa litšila tse sa tloaelehang. | Mohato ona o tiisa hore sehlahisoa sa ho qetela se hloekile ebile se se na litšila. |
4. Ho omisa le ho phollaane
Hang haHpmcSlurry ha e nke lehlakore ebile e hloelloa, mohato o latelang o omile ho fetola sehlahisoa phofo e ntle. Ts'ebetso ea ho omella e laoloa ka hloko ho boloka thepa ea lik'hemik'hale ea HPMC.
4.1. Ho omella
| Mohato | Ts'ebetso | Lintlha |
|---|---|---|
| Ho omella | Slur ea HPMC e omisitsoeng e omisitsoe, hangata e sebelisaSpray o omileng, Drum o omella, kapaHo omella ho omellamekhoa. | Ho omella ke mokhoa o tloaelehileng ka ho fetisisa, moo ho thelwa ho atoma ebe o omisitsoe ka molatsoana o chesang oa moea. |
| Taolo ea mocheso | Mocheso o laoloa ka hloko ho qoba litšila tsa cellulose ether. | Ka tloaelo, mocheso o pakeng tsa 50 ° C ho sebelisoa, ho latela mokhoa oa ho omisa. |
4.2. Ho sisinya le ho hlapaola
| Mohato | Ts'ebetso | Lintlha |
|---|---|---|
| Ho tsitsa | HPMC e omisitsoeng e tlase ho phofo e ntle. | Sena se etsa hore sebōpeho se tšoanang se ajoa hangata. |
| Ho sesa | Phofo ea HPMC phofo e tlositsoe ho fihlela boholo ba karolo ea junifomo. | Ho netefatsa hore phofo e na le lipalesa tse lakatsehang le tsa mefuta ea li-scount. |
5. Taolo ea boleng le liteko
Pele sehlahisoa sa HPMC se kenngoa le ho romelloa, e tsoa liteko tsa taolo ea boleng bo matla ho netefatsa hore e kopana le litekanyetso tsa indasteri.
5.1. Liteko tsa liketsahalo tsa pono
| Mohato | Ts'ebetso | Lintlha |
|---|---|---|
| Tekanyo ea liketsahalo tsa pono | Lekanya viscoketion ea tharollo e tloaelehileng ea HPMC ka metsing. | Lifuba tsa HPMC li bohlokoa bakeng sa lits'ebetso tse kang lidhera, bosholu le thepa ea kaho. |
5.2. Litaba tsa mongobo
| Mohato | Ts'ebetso | Lintlha |
|---|---|---|
| Teko ea mongobo | Tlhahlobo bakeng sa litaba tse setseng tsa mongobo. | Mongobo o feteletseng o ka lebisa ts'ebetsong hampe likolong tse ling. |
5.3. Ho itlhoekisa le ho hula liteko
| Mohato | Ts'ebetso | Lintlha |
|---|---|---|
| Tlhahlobo ea Putysis | Lekola bohloeki ba HPMC Ho sebelisa mekhoa e kang Chromatography. | Ho netefatsa hore HPMC ha e na lik'hemik'hale tse sa lebelloang. |
6. Ho paka
Hang ha HPMC e fetisetsa liteko tsohle tsa boleng bo tlase, e kenella homekotla, meropa, kapaLipeheloho latela litlhoko tsa bareki.
| Mohato | Ts'ebetso | Lintlha |
|---|---|---|
| Ho paka | Sephutheloana sena sehlahisoa sa ho qetela HPMC ka lisebelisoa tse loketseng. | Sehlahisoa se se se loketse ho romelloa bareki. |
| Ho ngola | Ho ngolisa ka nepo ka litlhaloso, palo ea batch le litaelo. | Mabitso a fana ka lintlha tse hloahloa ho bareki. |
Sephetho
Ts'ebetso ea tlhahiso ea hydroxypropyLe methylcelulolose (HPMC) e kenyelletsa mekhahlelo e 'maloa e laoloang ka hloko, ho qala ho tloha kholisong ea selefouno ea sehlahisoa. Mohato o mong le o mong oa ts'ebetso o susumetsa boleng le thepa ea HPMC, joalo ka viscosion, le bokhoni ba ho etsa li-filimi.
Ho utloisisa ts'ebetso ka botlalo ho etsa bonnete ba hore baetsi ba lihlahisoa ba ka ntlafatsa sethala ka seng ho hlahisa sehlahisoa sa indasteri e fapaneng, ho ea ka ho ea ho meriana ea meriana.
Poso Post: Hlakubele-07-2025