Methylcellulose (MC) ke motsoako oa selulose o qhibilihang ka metsi o nang le botenya, ho etsa filimi, ho tsitsisa le lintho tse ling. Hangata e sebelisoa lijong, meriana, kaho, litlolo le masimo a mang. Boitšoaro ba eona ba ho qhibiliha ka metsing bo batla bo ikhetha 'me ho bonolo ho theha tharollo ea colloidal, kahoo mokhoa o nepahetseng oa ho kopanya o bohlokoa ho phello ea oona.
1. Litšobotsi tsa methylcellulose
Methylcellulose ha e qhibilihe habonolo mocheso oa kamore, 'me ho qhibiliha ha eona ho angoa haholo ke mocheso. Metsing a batang, methylcellulose e ka etsa tharollo ea homogeneous ka ho qhalana butle-butle; empa ka metsing a chesang, e tla ruruha ka potlako le gel. Ka hona, taolo ea mocheso e bohlokoa haholo ha o kopanya methylcellulose le metsi.
2. Boitokisetso
Methylcellulose: E fumaneha ho tsoa ho barekisi ba thepa ea lik'hemik'hale kapa lilaboratori.
Metsi: Ho kgothaletswa ho sebedisa metsi a distilled kapa deionized ho qoba litšila metsing a thata ho tloha ho ama ho qhibiliha ha methylcellulose.
Lisebelisoa tsa ho Kopanya: Ho itšetlehile ka litlhoko tsa hau, motsoako o bonolo oa letsoho, motsoako o monyenyane oa lebelo le phahameng, kapa thepa ea ho kopanya indasteri e ka sebelisoa. Haeba e le ts'ebetso e nyenyane ea laboratori, ho kgothaletswa ho sebedisa magnetic stirrer.
3. Mohato oa ho kopanya
Mokhoa oa 1: Mokhoa oa ho hasanya metsi a batang
Motsoako oa metsi a batang: Nka metsi a batang a lekaneng (haholo-holo 0-10 ° C) 'me u a kenye ka har'a sejana se kopanyang. Etsa bonnete ba hore mocheso oa metsi o ka tlase ho 25°C.
Butle-butle eketsa methylcellulose: Butle-butle tšela phofo ea methylcellulose metsing a batang, u hlohlelletsa ha u ntse u tšela. Kaha methylcellulose e na le tšekamelo ea ho putlama, ho e eketsa ka kotloloho metsing ho ka etsa maqhubu, a ama esita le ho hasana. Ka hona, lebelo la ho eketsa le hloka ho laoloa ka hloko ho qoba ho eketsa palo e kholo ea phofo hang-hang.
Kopanya hantle: Sebelisa motsoako ka lebelo le bohareng kapa le tlase ho qhala methylcellulose ka botlalo metsing. Nako e susumetsang e itšetlehile ka li-viscosity tse lakatsehang tsa ho qetela le mofuta oa thepa, 'me ka kakaretso e nka metsotso e 5-30. Etsa bonnete ba hore ha ho na li-clumps kapa li-clumps tsa phofo.
Ho ruruha: Ha e ntse e hlohlelletsa, methylcellulose e tla monya metsi butle-butle le ho ruruha, ho etsa motsoako oa colloidal. Ts'ebetso ena e ka nka nako, ho latela mofuta le bongata ba methylcellulose e sebelisitsoeng. Viscosity e phahameng ea methylcellulose e nka nako e telele.
Tlohela hore u hōle: Ka mor'a hore ho sisinyeha ho felile, ho molemo ho tlohela motsoako hore o lule lihora tse 'maloa kapa bosiu bo le bong ho netefatsa hore methylcellulose e qhibilihile ka ho feletseng' me e ruruhile ka ho feletseng. Sena se ka ntlafatsa ka ho eketsehileng homogeneity ea tharollo.
Mokhoa oa 2: Mokhoa o habeli oa metsi a chesang le a batang
Mokhoa ona o loketse methylcellulose e nang le viscous haholo eo ho leng thata ho e hasanya ka ho toba metsing a batang.
Premix ea metsi a chesang: Chesa karolo ea metsi ho 70-80 ° C, ebe u potlakela ho tsosoa metsing a futhumetseng 'me u kenye methylcellulose. Nakong ena, ka lebaka la mocheso o phahameng, methylcellulose e tla atoloha ka potlako empa e ke ke ea qhibiliha ka ho feletseng.
Ho hlapolla ha metsi a batang: Ha u ntse u tsoela pele ho sisinya tharollo ea mocheso o phahameng, butle-butle eketsa metsi a batang a setseng ho fihlela mocheso oa tharollo o theohela ho mocheso o tloaelehileng kapa ka tlase ho 25°C. Ka tsela ena, methylcellulose e ruruhileng e tla qhibiliha metsing a batang ebe e etsa tharollo e tsitsitseng ea colloidal.
Ho hlohlelletsa le ho emisa ho ema: Tsoela pele ho sisinya ka mor'a ho pholile ho netefatsa hore tharollo e tšoana. Joale motsoako o tloheloa hore o lule ho fihlela o qhibiliha ka ho feletseng.
4. Litlhokomelo
Mocheso oa ho laola: Ho qhibiliha ha methylcellulose ho na le maikutlo a mangata haholo ho mocheso. Ka kakaretso e hasana hantle metsing a batang, empa e ka etsa gel e sa lekaneng metsing a chesang. E le ho qoba boemo bona, hangata ho khothalletsoa ho sebelisa mokhoa oa ho hasana ha metsi a batang kapa mokhoa oa bobeli o chesang le o batang.
Qoba ho bokellana: Kaha methylcellulose e monya haholo, ho tšela phofo e ngata ka ho toba ka metsing ho tla etsa hore bokaholimo bo atolohe ka potlako 'me bo thehe li-clumps ka har'a sephutheloana. Sena ha se ame feela phello ea ho qhibiliha, empa hape se ka lebisa ho viscosity e sa tšoaneng ea sehlahisoa sa ho qetela. Ka hona, etsa bonnete ba hore u eketsa phofo butle-butle 'me u hlohlelletse hantle.
Lebelo le susumetsang: Ho tsosoa ka lebelo le phahameng ho ka hlahisa palo e kholo ea li-bubble habonolo, haholo-holo ka tharollo e nang le viscosity e phahameng. Li-bubble li tla ama ts'ebetso ea ho qetela. Ka hona, ho sebelisa ho sisinyeha ka lebelo le tlase ke khetho e ntle ha o hloka ho laola viscosity kapa molumo oa bubble.
Tekanyo ea methylcellulose: Motsoako oa methylcellulose metsing o na le tšusumetso e kholo mekhoeng ea eona ea ho qhibiliha le tharollo. Ka kakaretso, maemong a tlase (ka tlase ho 1%), tharollo e tšesaane ebile e bonolo ho sisinyeha. Libakeng tse phahameng (tse kholo ho feta 2%), tharollo e tla ba viscous haholo 'me e hloka matla a matla ha e sisinyeha.
Nako ea ho ema: Nakong ea ho lokisetsa tharollo ea methylcellulose, nako ea ho ema e bohlokoa. Sena ha se lumelle feela hore methylcellulose e qhibilihe ka ho feletseng, empa hape e thusa li-bubble tse tharollo ho nyamela ka tlhaho, ho qoba mathata a bubble lits'ebetsong tse latelang.
5. Tsebo e khethehileng ea ho sebelisa
Lefapheng la lijo, methylcellulose e atisa ho sebelisoa ho etsa li-thickeners, stabilizers kapa colloids, tse kang ice cream, bohobe, lino tse tahang, joalo-joalo Litšebelisong tsena, mohato oa ho kopanya oa methylcellulose ka metsi o ama ka ho toba molomo le sebopeho sa sehlahisoa sa ho qetela. Chelete ea tšebeliso ea methylcellulose ea lijo hangata e nyane, 'me tlhokomelo e khethehileng e lokela ho lefshoa ho bekhang ho nepahetseng le ho eketsoa butle-butle.
Lefapheng la meriana, methylcellulose e atisa ho sebelisoa e le ntho e senyang bakeng sa matlapa kapa e le moemeli oa lithethefatsi. Tabeng ena, ho lokisetsa lithethefatsi hloka phahameng haholo tharollo homogeneity le botsitso, kahoo ho kgothaletswa ho laola ho qetela boleng ba sehlahisoa ka butle-butle eketsa viscosity le optimizing maemo a susumetsang maikutlo.
Ho kopanya methylcellulose le metsi ke mokhoa o hlokang mamello le tsebo. Ka ho laola mocheso oa metsi, taelo ea ho eketsa le lebelo le susumetsang, ho ka fumanoa tharollo ea junifomo le e tsitsitseng ea methylcellulose. Ho sa tsotellehe hore na ke mokhoa oa ho hasana ha metsi a batang kapa mokhoa oa bobeli o chesang le o batang, senotlolo ke ho qoba ho bokellana ha phofo le ho netefatsa ho ruruha ho lekaneng le ho phomola.
Nako ea poso: Sep-30-2024