IHydroxypropyl methyl cellulose (HPMC), imathiriyeli ekrwadaiselulosi, inokucocwa ikotoni okanye i-pulp yomthi.Kuyimfuneko ukuyicoca phambi okanye ngexesha lenkqubo ye-alkalization.I-pulverization yenziwa ngamandla omatshini.Tshabalalisa ulwakhiwo oludityanisiweyo lwemathiriyeli ye-cellulose ekrwada ukunciphisa icrystallinity kunye ne-polymerization degree kunye nokwandisa indawo yayo ephezulu, ngaloo ndlela iphucula ukufikeleleka kunye nobuchule bokusabela kweekhemikhali ze-reagents kumaqela amathathu e-hydroxyl kwisiseko se-cellulose macromolecular glucose ring.
IHydroxypropyl methyl cellulose (HPMC)isetyenziswe njenge-substrate ye-raw material ukuvelisa i-oyile, enokuqonda ukusetyenziswa kweswekile epheleleyo, ukuphucula izinga lokusetyenziswa kwezinto eziluhlaza, ukunciphisa inani elishiyekileyo le-substrate kwi-broth fermentation, kunye nokunciphisa iindleko zokucocwa kwamanzi amdaka.Iimpawu zei-methyl cellulosezinceda ukulungelelaniswa kwebhetshi, ibhetshi etyiswayo kunye neenkqubo eziqhubekayo zokuvundiswa, ukuphepha uthotho lweengxaki ezinjengokulawula ukubunjwa kwe-medium kunye nesantya sokuxutywa;kwangaxeshanye, kukwanceda ukulawulwa kwenkqubo yokuvundisa.Ngenxa yokuba iipropati zeihydroxypropyl methyl cellulose (HPMC)zifana nezinye ii-ethers ezinyibilikayo zamanzi, zinokusetyenziswa njenge-agent-forming agent, i-thickener, i-emulsifier kunye ne-stabilizer kwi-latex coatings kunye ne-soluble water-soluble resin coating components, okwenza kube lula ukwenza i-coatings Ifilimu inokuxhathisa okulungileyo kwe-abrasion, ukulinganisa. iipropati kunye nokubambelela, kwaye iphucule ukunyanzeliswa komphezulu, ukuzinza kwi-asidi kunye ne-alkali, kunye nokuhambelana ne-pigment yensimbi.
IHydroxypropyl methyl cellulose (HPMC)inefuthe elihle njenge-thickener ye-polyvinyl acetate yamanzi amhlophe asekelwe emanzini.Iqondo lokutshintshwa kwei-cellulose etherkwandiswe, kwaye ukuxhathisa kwiibhaktheriya kunye nokhukuliseko lukwandiswa.
Nangona umgaqo we-etherification synthesis ye-hydroxypropyl methylcellulose (HPMC) ayinzima, i-alkalization, i-raw material crushing, kunye ne-alkalization.Iimeko ezahlukeneyo ze-etherification, ukubuyiswa kwe-solvent, ukuhlukana kwe-centrifugal, ukuhlamba kunye nokomisa kubandakanya inani elikhulu lobuchwepheshe obuphambili kunye nolwazi olucebileyo.
Kwiintlobo ezahlukeneyo zeemveliso, indawo nganye ineemeko zokulawula zamva nje, ezifana nobushushu, ixesha, uxinzelelo kunye nolawulo lokuhamba kwezinto.Izixhobo ezincedisayo kunye nezixhobo zokulawula ziyisiqinisekiso esinokwethenjelwa nesiluncedo somgangatho ozinzileyo wemveliso kunye nenkqubo yokuvelisa ethembekileyo.
Iimpawu zemveliso yei-hydroxypropyl methyl cellulose:
1. Iipropati: Le mveliso ngumgubo omhlophe, kwaye ayinavumba, ayinancasa kwaye ayinayo ityhefu.
2. Ugcino lwamanzi: Ngenxa yokuba le mveliso inokufunxa amanzi amatyeli amaninzi anzima kunawo.Gcina ukugcinwa kwamanzi aphezulu kwidaka, igypsum, ipeyinti kunye nezinye iimveliso.
3. Le mveliso inokunyibilika emanzini abandayo ukwenza i-solvent viscous ebonakalayo.
4. Ukuchithwa kwi-solvents ye-organic: Ngenxa yokuba iqulethe umlinganiselo othile we-hydrophobic genes, le mveliso inokunyibilika kwezinye i-solvents ze-organic, kwaye inokuchithwa kwi-solvents edibeneyo yamanzi kunye ne-organic matter.
5. Ukuxhathisa ityuwa: Ekubeni le mveliso i-non-ionic kunye ne-non-polyelectrolyte, izinzile kwizisombululo ezimanzi zetyuwa zetsimbi okanye i-electrolytes ye-organic.Kwimeko ye-electrolyte eninzi, inokubangela i-gelation okanye imvula.
6. Umsebenzi womphezulu: Isisombululo esimanzi sale mveliso sinomsebenzi ongaphezulu.
Ixesha lokuposa: Nov-29-2021