Hydroxyethyl methyl cellulose HEMCe ka sebelisoa e le moemeli ea sireletsang colloid, emulsifier le dispersant ka lebaka la mosebetsi oa eona o sebetsang holim'a metsi tharollong ea metsi. Mohlala oa ts'ebeliso ea eona ke o latelang: Tšusumetso ea hydroxyethyl methyl cellulose holim'a thepa ea samente. Hydroxyethyl methylcellulose ke phofo e tšoeu e se nang monko, e se nang tatso, e se nang chefo e qhibilihang metsing a batang ho etsa tharollo e hlakileng, e tiileng. E na le litšobotsi tsa ho teteana, ho tlama, ho qhalakanya, ho kopanya, ho etsa filimi, ho emisa, ho monya, ho etsa gelling, ho sebetsa holim'a metsi, ho boloka mongobo le ho sireletsa colloids. Ka lebaka la mosebetsi o sebetsang holim'a metsi oa tharollo ea metsi, e ka sebelisoa e le moemeli ea sireletsang colloid, emulsifier le dispersant. Tharollo ea metsi ea Hydroxyethyl methyl cellulose e na le hydrophilicity e ntle 'me ke moemeli ea bolokang metsi ea sebetsang hantle.
lokisetsa
Mokhoa oa ho lokisa hydroxyethyl methyl cellulose, o kenyelletsa ho sebelisa k'hothone e hloekisitsoeng e le thepa e tala le ethylene oxide e le moemeli oa ho hema ho lokisahydroxyethyl methyl cellulose. Lisebelisoa tse tala tsa ho lokisa hydroxyethyl methyl cellulose li lokisoa ka likarolo tse itseng ka boima: likarolo tse 700-800 tsa motsoako oa toluene le isopropanol e le solvent, likarolo tse 30-40 tsa metsi, likarolo tse 70-80 tsa sodium hydroxide, likarolo tse 80-85 tsa k'hothone e hloekisitsoeng, likarolo tse 20-28 tsa oxyethane, likarolo tse 80-90 tsa methyl chloride, le likarolo tse 16-19 tsa glacial acetic acid; mehato e tobileng ke ena:
Mohato oa pele, ka har'a reactor, eketsa toluene le motsoako oa isopropanol, metsi le sodium hydroxide, ebe o futhumala ho fihlela ho 60 ~ 80 ℃, ebe o futhumala metsotso e 20 ~ 40;
Mohato oa bobeli, ho etsa alkalize: pholisa lisebelisoa tse ka holimo ho fihlela ho 30 ～50 ℃, eketsa k'hothone e hloekisitsoeng, fafatsa motsoako oa toluene le isopropanol ka solvent, tlosa ho 0.006Mpa, tlatsa ka naetrojene bakeng sa libaka tse 3 tse nkeloang sebaka, 'me u etse alkali ka mor'a ho e nkela sebaka. Maemo a alkalize ke a latelang: nako ea alkalize ke lihora tse 2, 'me mocheso oa alkalize ke 30°C ho isa ho 50°C;
Mohato oa boraro, ho etsa etherification: alkaliization e phethiloe, reactor e tlosoa ho 0.05 ~ 0.07MPa, ethylene oxide le methyl chloride lia eketsoa, 'me li bolokoa metsotso e 30 ~ 50; mohato oa pele oa ho etsa etherification: 40 ~ 60℃, lihora tse 1.0 ~ 2.0, khatello e laoloa pakeng tsa 0.150.3Mpa; mohato oa bobeli oa ho etsa etherification: 60 ~ 90℃, lihora tse 2.0 ~ 2.5, khatello e laoloa pakeng tsa 0.40.8Mpa;
Mohato wa bone, ho se be le metsi: eketsa acetic acid e lekantsweng esale pele ka ketleleng ya pula, tobetsa ka hara thepa e nang le ether bakeng sa ho se be le metsi, futhumatsa 75 ~ 80 ℃ ho etsa pula, mocheso o nyolohela ho 102 ℃, mme boleng ba pH ba ho lemoha ke 68 Ha pula e phethetswe, tanka ya pula e tlatswa ka metsi a pompo a phekotsweng ke sesebediswa sa reverse osmosis ho 90 ℃ ~ 100 ℃;
Mohato oa bohlano, ho hlatsoa ka sekontirifu: thepa e mohatong oa bone e tšeloa ka sekontirifu ka sekontirifu se otlolohileng, 'me thepa e arohaneng e fetisetsoa ketleleng ea ho hlatsoa e tletseng metsi a chesang esale pele, 'me thepa e hlatsuoa;
Mohato oa botšelela, ho omisa ka sekontirifu: thepa e hlatsoitsoeng e isoa ka har'a sesebelisoa sa ho omisa ka sekontirifu se otlolohileng sa screw, thepa e omisoa mochesong oa 150-170°C, 'me thepa e omisitsoeng ea siloa ebe ea pakoa.
Ha ho bapisoa le tse tengether ea seluloseKa lebaka la theknoloji ea tlhahiso, tlhahiso ena e sebelisa ethylene oxide e le moemeli oa ho ether ho lokisa hydroxyethyl methyl cellulose, 'me e na le bokhoni bo botle ba ho loantša hlobo hobane e na le sehlopha sa hydroxyethyl, Botsitso bo botle ba viscosity le khanyetso ea hlobo nakong ea polokelo ea nako e telele. E ka sebelisoa ho e-na le li-ether tse ling tsa cellulose.
Nako ea poso: Mmesa-25-2024