1. Tšebeliso e ka sehloohong eahydroxypropyl methylcellulose (HPMC)?
HPMC e sebelisoa haholo thepa ea kaho, liphahlo, li-resin tsa maiketsetso, li-ceramic, meriana, lijo, masela, temo, litlolo, koae le liindasteri tse ling. HPMC e ka aroloa ka sehlopha sa kaho, sehlopha sa lijo le sehlopha sa meriana ho latela morero. Hona joale, boholo ba lihlahisoa tsa lapeng ke sehlopha sa kaho. Sehlopha sa kaho, phofo ea putty e sebelisoa ka bongata, hoo e ka bang 90% e sebelisoa bakeng sa phofo ea putty, 'me e setseng e sebelisoa bakeng sa seretse sa samente.
2. Monko oa hydroxypropyl methylcellulose (HPMC) ke ofe?
HPMC e hlahisoang ke mokhoa oa ho qhibiliha e sebelisa toluene le isopropanol e le li-solvent. Haeba ho hlatsoa ho se monate haholo, ho tla ba le monko o setseng.
3. Mekhoa ea ho qhaqha ha hydroxypropyl methylcellulose (HPMC) ke efe?
Mokhoa oa ho qhala ka metsi a chesang: Kaha HPMC ha e qhale ka metsing a chesang, HPMC e ka qhalanngoa ka ho lekana ka metsing a chesang mohatong oa pele, ebe e qhala kapele ha e pholile. Mekhoa e 'meli e tloaelehileng e hlalosoa ka tsela e latelang:
1) Kenya metsi a chesang a hlokahalang ka setshelong 'me u a futhumatse ho fihlela ho 70°C. Hydroxypropyl methylcellulose e ile ea eketsoa butle-butle tlas'a ho hlohlelletsa butle, qalong HPMC e ile ea phaphamala holim'a metsi, 'me butle-butle ea etsa lerōle, le ileng la pholisoa tlas'a ho hlohlelletsa.
2), eketsa 1/3 kapa 2/3 ea metsi a hlokahalang ka setshelong, 'me u a futhumatse ho fihlela ho 70°C, u hasanye HPMC ho latela mokhoa oa 1), 'me u lokise slurry ea metsi a chesang; ebe u eketsa metsi a batang a setseng ho slurry ea metsi a chesang, motsoako o ile oa pholile ka mor'a ho hlohlelletsa.
Mokhoa oa ho kopanya phofo: kopanya phofo ea HPMC le lintho tse ling tse ngata tse nang le phofo, kopanya hantle ka mochini o kopanyang, ebe u eketsa metsi ho qhibiliha, ebe HPMC e ka qhibiliha ka nako ena ntle le ho kopana, hobane ho na le HPMC e nyane feela sekhutlong se seng le se seng se senyenyane Phofo, e tla qhibiliha hang ha e kopana le metsi. ——Bahlahisi ba phofo ea putty le seretse ba sebelisa mokhoa ona. [Hydroxypropyl methylcellulose (HPMC) e sebelisoa e le sesebelisoa se teteaneng le se bolokang metsi ka har'a seretse sa phofo ea putty.]
4. U ka ahlola boleng ba hydroxypropyl methylcellulose (HPMC) joang ka bonolo le ka tlhaho?
(1) Bosweu: Le hoja bosweu bo ke ke ba tseba hore na HPMC e bonolo ho e sebedisa, mme haeba ho eketswa di-agent tsa ho sweufatsa nakong ya tshebetso ya tlhahiso, e tla ama boleng ba yona. Leha ho le jwalo, boholo ba dihlahiswa tse ntle di na le bosweu bo botle.
(2) Botenya: Botenya ba HPMC ka kakaretso bo na le letlooeng la 80 le letlooeng la 100, 'me letlooeng la 120 le le tlase. Boholo ba HPMC e hlahisoang Hebei ke letlooeng la 80. Ha letlooeng le letenya le letenya, ka kakaretso, ho molemo.
(3) Phetiso ea leseli: behahydroxypropyl methylcellulose (HPMC)ka metsing ho etsa colloid e bonaletsang, 'me u shebe phetiso ea eona ea leseli. Ha phetiso ea leseli e le kholoanyane, ho molemo, ho bontša hore ho na le lintho tse sa qhibiliheng ho eona. . Ho kenella ha li-reactor tse otlolohileng ka kakaretso ho hotle, 'me ha li-reactor tse otlolohileng ho mpefala, empa ha ho bolele hore boleng ba li-reactor tse otlolohileng bo betere ho feta ba li-reactor tse otlolohileng, 'me boleng ba sehlahisoa bo khethoa ke lintlha tse ngata.
(4) Matla a khoheli a itseng: Ha matla a khoheli a itseng a le maholo, boima ba ’ona bo ba betere. Matla a khoheli a maholo, ka kakaretso hobane bokahare ba sehlopha sa hydroxypropyl ho sona bo phahame, ’me bokahare ba sehlopha sa hydroxypropyl bo phahame, ho boloka metsi ho ba betere.
5. Phapang ke efe pakeng tsa mofuta oa hang-hang oa metsi a batang le mofuta oa hydroxypropyl methylcellulose o qhibilihang ka ho chesang ts'ebetsong ea tlhahiso?
Mofuta oa HPMC o hasanang ka potlako o phekoloa ka glyoxal holim'a metsi, 'me o hasana ka potlako metsing a batang, empa ha o qhibilihe e le kannete. O qhibiliha feela ha viscosity e eketseha. Mofuta oa hang-hang ha o na kalafo ea holim'a metsi ka glyoxal. Haeba bongata ba glyoxal bo le boholo, ho hasana ho tla ba kapele, empa viscosity e tla eketseha butle, 'me haeba bongata bo le bonyenyane, se fapaneng le seo e tla ba 'nete.
6. Ke bokae bo nepahetseng ba hydroxypropyl methylcellulose (HPMC)?
Phofo ea putty ka kakaretso ke li-yuan tse 100,000, 'me litlhoko tsa seretse li phahame, 'me li-yuan tse 150,000 lia hlokahala bakeng sa tšebeliso e bonolo. Ho feta moo, mosebetsi oa bohlokoa ka ho fetisisa oa HPMC ke ho boloka metsi, o lateloa ke ho teteana. Phofong ea putty, hafeela ho boloka metsi ho le molemo 'me viscosity e le tlase (70,000-80,000), hoa khoneha hape. Ehlile, ha viscosity e phahame, ho boloka metsi ho molemo. Ha viscosity e feta 100,000, viscosity e tla ama ho boloka metsi. Ha ho sa na letho le leholo.
7. Lipontšo tse ka sehloohong tsa tekheniki tsa hydroxypropyl methylcellulose (HPMC) ke life?
Bongata ba batho ba amehile ka bongata ba hydroxypropyl le ho teteana ha metsi, ka kakaretso ba na le ho boloka metsi ho betere. Bongata ba hydroxypropyl bo na le ho boloka metsi ho betere, ka tekanyo e itseng (eseng ka ho felletseng), 'me bongata bo betere bo sebelisoa ka har'a seretse sa samente.
8. Lisebelisoa tse ka sehloohong tsa hydroxypropyl methylcellulose (HPMC) ke life?
Lisebelisoa tse ka sehloohong tse tala tsa hydroxypropyl methylcellulose (HPMC): k'hothone e hloekisitsoeng, methyl chloride, propylene oxide, le lisebelisoa tse ling tse tala, caustic soda, asiti, toluene, isopropanol, jj.
9. Mosebetsi o ka sehloohong oa ts'ebeliso eaHPMCka phofo ea putty, 'me na e etsahala ka lik'hemik'hale?
Phofong ea putty, HPMC e bapala likarolo tse tharo tsa ho teteana, ho boloka metsi le kaho.
Ho teteana: Cellulose e ka teteana ho emisa le ho boloka tharollo e lekana holimo le tlase, le ho hanela ho thella.
Ho boloka metsi: etsa hore phofo ea putty e ome butle, 'me u thuse calcium ea molora ho arabela tlas'a tšusumetso ea metsi.
Kaho: Cellulose e na le phello ea ho tlotsa, e leng se ka etsang hore phofo ea putty e be le kaho e ntle.
Ho eketsa metsi phofong ea putty le ho e beha leboteng ke karabelo ea lik'hemik'hale, hobane lintho tse ncha lia thehoa. Haeba u tlosa phofo ea putty leboteng, u e sila hore e be phofo, 'me u e sebelise hape, e ke ke ea sebetsa hobane lintho tse ncha (calcium carbonate) li se li entsoe. ) le tsona.
Likarolo tse ka sehloohong tsa phofo ea khalsiamo ea molora ke: motsoako oa Ca(OH)2, CaO le CaCO3 e nyane, CaO+H2O=Ca(OH)2—Ca(OH)2+CO2=CaCO3↓+H2O Khalsiamo ea molora e metsing le moeeng Tlas'a ketso ea CO2, calcium carbonate ea hlahisoa, ha HPMC e boloka metsi feela, e thusa karabelo e betere ea calcium ea molora, 'me ha e kenelle karabelong efe kapa efe ka boeona.
10. HPMC ke ether ya cellulose e seng ya ionic, jwale e seng ya ionic ke eng?
Ka mantsoe a tloaelehileng, li-non-ion ke lintho tse sa ioning ka metsing. Ionization e bolela mokhoa oo electrolyte e aroloang ho ba li-ion tse tjhajisitsoeng tse ka tsamaeang ka bolokolohi ka har'a solvent e itseng (joalo ka metsi, joala). Mohlala, sodium chloride (NaCl), letsoai leo re le jang letsatsi le leng le le leng, lea qhibiliha ka metsing 'me lea ionis ho hlahisa li-ion tsa sodium tse tsamaeang ka bolokolohi (Na+) tse tjhajisitsoeng ka nepo le li-ion tsa chloride (Cl) tse tjhajisitsoeng hampe. Ke hore, ha HPMC e kenngoa ka metsing, e ke ke ea arohana le li-ion tse tjhajisitsoeng, empa e teng ka sebopeho sa limolek'hule.
11. Thempereichara ea gel ea hydroxypropyl methylcellulose e amana le eng?
Mocheso oa gel oa HPMC o amana le methoxy ea eona, ha methoxy e le tlase, mocheso oa gel o phahame.
12. Na ho na le kamano efe kapa efe pakeng tsa lerotholi la phofo ea putty le HPMC?
Ho lahleheloa ke phofo ea phofo ea putty ho amana haholo le boleng ba calcium ea molora, 'me ha ho amane hakaalo le HPMC. Khalsiamo e tlase ea calcium ea grey calcium le karolelano e sa lokelang ea CaO le Ca(OH)2 ka har'a calcium e putsoa li tla baka tahlehelo ea phofo. Haeba e amana le HPMC, joale haeba HPMC e na le ho boloka metsi ho fokolang, e tla boela e bake tahlehelo ea phofo.
13. Phapang ke efe pakeng tsa mofuta oa hang-hang oa metsi a batang le mofuta oa hydroxypropyl methylcellulose o qhibilihang ka ho chesang ts'ebetsong ea tlhahiso?
Mofuta oa ho hasana ka potlako oaHPMCe phekolwa hodima metsi ka glyoxal, mme e hasana kapele metsing a batang, empa ha e qhibilihe e le kannete. E qhibiliha feela ha viscosity e eketseha. Mofuta wa hang-hang ha o na kalafo ya hodima metsi ka glyoxal. Haeba bongata ba glyoxal bo le boholo, ho hasana ho tla ba kapele, empa viscosity e tla eketseha butle, mme haeba bongata bo le bonyenyane, se fapaneng le seo e tla ba nnete.
Nako ea poso: Mmesa-25-2024