Fektheri ea HPMC: Tataiso e Felletseng ea Tlhahiso ea Hydroxypropyl Methylcellulose

Hydroxypropyl Methylcellulose (HPMC) ke e 'ngoe ea li-ether tsa cellulose tse sebelisoang haholo makaleng a kaho lefatšeng ka bophara, meriana, lijo le indasteri. Ha tlhoko ea thepa ea kaho e sebetsang hantle le lik'hemik'hale tse ikhethang e ntse e hola, karolo ea setsebi Feme ea HPMC Ho ba bohlokoa le ho feta. Ho utloisisa hore na HPMC e hlahisoa joang, mahlale a amehang, le litekanyetso tsa boleng tse sebelisoang ho ka thusa bareki ho khetha bafepedi ba tšepahalang le ho netefatsa ts'ebetso e tsitsitseng ea sehlahisoa.

Tataiso ena e hlahloba ts'ebetso e felletseng ea tlhahiso ea HPMC, mahlale a bohlokoa a sebelisoang lifekthering tsa sejoale-joale, le lintlha tse khethollang moetsi oa boleng bo holimo ho mofani oa thepa ea tloaelehileng.

HPMC (Hydroxypropyl Methylcellulose) ke Eng?

Hydroxypropyl Methylcellulose ke ether ea cellulose e seng ea ionic e nkiloeng ho cellulose ea tlhaho. Ka phetoho ea lik'hemik'hale, likhoele tsa cellulose li fetoloa polymer e qhibilihang ka metsing e nang le ho tenya ho hoholo, ho boloka metsi le thepa ea ho etsa filimi. Ka lebaka la litšobotsi tsena, HPMC e sebelisoa haholo liindastering tse kang thepa ea kaho, meriana, liphahlo, ts'ebetso ea lijo le lihlahisoa tsa tlhokomelo ea botho.

Ho ea ka lipatlisiso tse phatlalalitsoeng ho ScienceDirect , HPMC e fana ka boits'oaro bo ikhethang ba ho kenella ha mocheso, taolo ea rheology, le botsitso, e leng se etsang hore e lokele mefuta e mengata ea liforomo tsa indasteri.

Lisebelisoa tse tala tse sebelisoang fekthering ea HPMC

Tlhahiso ea HPMC e qala ka cellulose ea tlhaho ea boleng bo holimo, eo hangata e fumanoang ho tsoa li-linters tsa k'hothone tse hloekisitsoeng kapa pulp ea lehong. Lisebelisoa tsena tse tala li khethoa ka lebaka la bohloeki ba tsona bo phahameng le sebopeho se tsitsitseng sa faeba.

Lisebelisoa tsa bohlokoa tse sebelisoang tlhahisong ea HPMC li kenyelletsa:

• Celulose ea k'hothone e hloekisitsoeng kapa ea lehong
• Methyl chloride
• Propylene oxide
• Sodium hydroxide
• Li-solvent tsa tlhaho bakeng sa taolo ea karabelo

Bohloeki ba thepa ena bo phetha karolo ea bohlokoa ho khethoeng ha boleng ba sehlahisoa sa ho qetela le litšobotsi tsa ts'ebetso.

Ts'ebetso e Felletseng ea Tlhahiso ea HPMC

1. Tokisetso ea Cellulose le Alkalization

Mokhahlelong oa pele, likhoele tsa cellulose tse hloekisitsoeng li phekoloa ka sodium hydroxide ho kenya tšebetsong sebopeho sa limolek'hule. Ts'ebetso ena, e tsejoang e le alkalization, e lumella liketane tsa cellulose ho arabela le li-etherifying agents mohatong o latelang.

Tikoloho ea karabelo e laoloa ka hloko ho boloka ho ruruha ha faeba ho nepahetseng le ho fumaneha ha lik'hemik'hale ka mokhoa o ts'oanang.

2. Karabelo ea Etherification

Nakong ea etherification, cellulose e sebetsang e arabela le methyl chloride le propylene oxide. Lik'hemik'hale tsena li kenya lihlopha tsa methyl le hydroxypropyl sebopehong sa cellulose, li e fetola Hydroxypropyl Methylcellulose.

Tekanyo ea ho nkeloa sebaka le ho nkeloa sebaka ha molar li khetholla litšobotsi tsa ho qetela tsa HPMC, ho kenyeletsoa le ho teteana, ho boloka metsi le botsitso ba mocheso.

Ho ea ka litokomane tsa tekheniki tse tsoang ho Litharollo tsa Kaho ea Ashland , taolo e nepahetseng ea maemo a ho nkeloa sebaka ke ea bohlokoa bakeng sa ho fihlela ts'ebetso e tsitsitseng lits'ebetsong tsa kaho le tsa meriana.

3. Ho se nke lehlakore le ho hlatswa

Kamora ho etherification, motsoako oa karabelo oa koaheloa ebe oa hlatsuoa ho tlosa matsoai a setseng le lihlahisoa tse ling. Hangata ho sebelisoa mekhoa e mengata ea ho hlatsoa ho netefatsa bohloeki bo phahameng le motsoako o tsitsitseng oa lik'hemik'hale.

4. Ho omisa le ho sila

Thepa e hloekisitsoeng ea HPMC e omisoa tlas'a maemo a mocheso o laoloang ho boloka botšepehi ba polymer. Kamora ho omisa, thepa e siloa hore e be phofo e ntle ho fihlela kabo ea boholo ba likaroloana e lakatsehang.

5. Ho Sila le ho Paka ha ho Qetela

Sehlahisoa sa ho qetela se feta tlhahlobong le tlhahlobong ea boleng pele se paka. Lifeme tsa sejoale-joale tsa HPMC hangata li sebelisa litsamaiso tsa ho paka tse iketsang ho boloka bohloeki, botsitso le katleho nakong ena.

Taolo ea Boleng Fekthering ea HPMC ea Litsebi

Bahlahisi ba boleng bo holimo ba HPMC ba kenya tshebetsong mekgwa e thata ya taolo ya boleng nakong yohle ya tlhahiso. Sena se netefatsa ho teteana ho tsitsitseng, maemo a ho nkela sebaka le mongobo.

Liteko tse tloaelehileng tsa taolo ea boleng li kenyelletsa:

• Tekanyo ea ho thothomela
• Tlhahlobo ea mongobo
• Teko ea kabo ea boholo ba likaroloana
• Tlhahlobo ea boemo ba pH
• Netefatso ea lengolo la ho nka sebaka

Likhamphani tsa machaba hangata li latela litsamaiso tsa taolo ea boleng ba ISO 'me li latela maemo a taolo a lefats'e ho netefatsa botšepehi ba sehlahisoa.

Tataiso ea indasteri ho tsoa ho Dow Cellulosis e totobatsa hore ho beha leihlo ts'ebetso e tsitsitseng ho bohlokoa bakeng sa ho boloka boleng ba ether ea cellulose ho pholletsa le bongata bo boholo ba tlhahiso.

Dikopo tse ka Sehloohong tsa Dihlahiswa tsa HPMC

Lihlahisoa tse entsoeng fekthering ea HPMC li sebelisoa liindastering tse ngata ka lebaka la thepa ea tsona ea mesebetsi e mengata.

• Sekhomaretsi sa thaele le seretse se ommeng sa motsoako
• Setlolo sa lebota le seaparo se se nang mafura
• Samente ea gypsum
• Metsoako e iketsang
• Liaparo tsa matlapa tsa meriana
• Lijo tse matlafatsang le tse matlafatsang
• Lihlahisoa tsa tlhokomelo ea botho

Thepa ea kaho, HPMC e ntlafatsa ho boloka metsi, ho sebetsa hantle, nako ea ho bula le matla a ho khomarela, e leng se etsang hore e be tlatsetso ea bohlokoa bakeng sa mekhoa ea meaho ea sejoale-joale.

Ke Eng se Hlalosang Fektheri ea Kajeno ea HPMC

Bahlahisi ba ka sehloohong ba tsetela theknolojing e tsoetseng pele le litsamaisong tsa tlhahiso tse iketsang ho boloka tlholisano ea lefats'e.

Likarolo tsa bohlokoa tsa lifeme tsa sejoale-joale tsa HPMC li kenyelletsa:

• Li-reactor tsa etherification tse iketsang
• Mekhoa ea taolo ea mocheso o nepahetseng
• Lisebelisoa tse tsoetseng pele tsa ho omisa le ho sila
• Libaka tse felletseng tsa liteko tsa laboratori
• Bokhoni bo boholo ba tlhahiso

Bokgoni bona bo thusa bahlahisi ho hlahisa dikereiti tse tsitsitseng tsa HPMC tse loketseng ditshebediso tse boima tsa indasteri.

Qetello

Setsebi Feme ea HPMC e bapala karolo ea bohlokoa ho fepeng ether ea cellulose e sebetsang hantle ho liindasteri lefatšeng ka bophara. Ho tloha ho lokiseng thepa e tala ho ea ho theknoloji e tsoetseng pele ea etherification le litsamaiso tse thata tsa taolo ea boleng, mohato o mong le o mong oa ts'ebetso ea tlhahiso o susumetsa ts'ebetso ea ho qetela ea sehlahisoa.

Bakeng sa bareki le barekisi, ho utloisisa kamoo HPMC e etsoang kateng ho fana ka temohisiso ea bohlokoa ha ho hlahlojoa bafepedi le ho khethoa balekane ba tšepahalang bakeng sa tšebelisano-'moho ea nako e telele.