Phetiso e bobebe ea hydroxypropyl methylcellulose e angoa haholo ke lintlha tse latelang:
1. Boleng ba thepa e tala.
Ea bobeli, phello ea alkalization.
3. Karolelano ea ts'ebetso
4. Karolo ea solvent
5. Phello ea ho se nke lehlakore
Lihlahisoa tse ling li na le maru joaloka lebese ka mor'a hore li qhibilihe, tse ling li tšoeu, tse ling li mosehla, 'me tse ling li hlakile ebile li hlakile… Ho rarolla bothata, fetola lintlha tse latelang.Ka linako tse ling asiti ea acetic e ka ama phetiso ea leseli haholo.Ho molemo ho sebelisa acetic acid ka mor'a ho hlapolloa.Tšusumetso e kholo ka ho fetisisa ke hore na karabelo e tsosoa ka ho lekana le hore na tekanyo ea tsamaiso e tsitsitse (lisebelisoa tse ling li na le mongobo 'me litaba ha lia tsitsa, tse kang solvent e sebelisetsoang ho tsosolosa).Ha e le hantle, ho na le mabaka a mangata a amehang.Haeba thepa e tsitsitse mme basebetsi ba koetlisitsoe hantle, tlhahiso e lokela ho ba e tsitsitseng haholo.Phatlalatso ea leseli e ke ke ea feta boholo ba ± 2%, 'me ho tšoana ha lihlopha tse nkelang sebaka ho tlameha ho laoloa hantle.Sebakeng sa ho ts'oana, phetiso ea leseli e ne e tla ba hantle.
Lintlha tse Amang Viscosity ea Hydroxypropyl Methyl Cellulose
High-viscosity hydroxypropyl methylcellulose ha e khone ho hlahisa selulose e phahameng haholo feela ka vacuum le phetoho ea naetrojene tlhahisong.Ka kakaretso, tlhahiso ea cellulose e phahameng ea viscosity Chaena e ke ke ea laoloa.Leha ho le joalo, haeba sesebelisoa sa ho lekanya oksijene se ka kenngoa ka kettle, tlhahiso ea viscosity ea eona e ka laoloa ka mokhoa oa maiketsetso.
entsoe.Ho phaella moo, ha ho nahanoa ka lebelo la ho nkela naetrojene sebaka, ho bonolo ho hlahisa lihlahisoa tse nang le viscosity e phahameng ho sa tsotellehe hore na tsamaiso e thibela moea hakae.Ehlile, tekanyo ea polymerization ea k'hothone e hloekisitsoeng le eona e bohlokoa.Haeba seo se sa sebetse, se etse ka hydrophobic association.Ho na le baemeli ba mekhatlo sebakeng sena Chaena.Ke mofuta ofe oa moemeli oa mokhatlo oo u ka o khethang o nang le tšusumetso e kholo ts'ebetsong ea sehlahisoa sa ho qetela.Oksijene e setseng ka har'a reactor e baka ho senyeha ha selulose le ho fokotseha ha boima ba molek'hule, empa oksijene e setseng e lekanyelitsoe, ha feela limolek'hule tse robehileng li kopantsoe hape, ha ho thata ho etsa viscosity e phahameng.Leha ho le joalo, sekhahla sa saturation se amana haholo le litaba tsa hydroxypropyl.Lifeme tse ling li batla feela ho fokotsa litšenyehelo le theko, empa ha li ikemisetse ho eketsa litaba tsa hydroxypropyl, kahoo boleng bo ke ke ba fihla boemong ba lihlahisoa tse tšoanang tsa linaheng tse ling.Sekhahla sa ho boloka metsi sa sehlahisoa se na le kamano e ntle le hydroxypropyl, empa bakeng sa ts'ebetso eohle ea karabelo, e boetse e lekanyetsa sekhahla sa ho boloka metsi, phello ea alkalization, karolelano ea methyl chloride le propylene oxide, mahloriso a alkali le ho boloka metsi.Karo-karolelano ea k'hothone e hloekisitsoeng e etsa qeto ea ts'ebetso ea sehlahisoa.
Nako ea poso: May-23-2023