Okukhona i-viscosity inkuluI-HPMCI-hydroxypropyl methyl cellulose, kokukhona ukusebenza kokugcinwa kwamanzi kungcono. Ukuqina kwe-viscosity yiparameter ebalulekileyo yokusebenza kwe-HPMC. Okwangoku, abavelisi abahlukeneyo be-HPMC basebenzisa iindlela ezahlukeneyo kunye nezixhobo ukumisela ukuqina kwe-HPMC. Iindlela eziphambili yiHaake URotovisko, uHoppler, uUbbelohde kunye noBrookfield, njl.
Kwimveliso efanayo, iziphumo ze-viscosity ezilinganiswa ngeendlela ezahlukeneyo zahlukile kakhulu, ezinye zide zibe nomahluko amaninzi. Ke ngoko, xa kuthelekiswa i-viscosity, kufuneka yenziwe phakathi kwendlela yovavanyo efanayo, kubandakanya ubushushu, i-rotor, njl.
Ngobungakanani besuntswana, kokukhona isuntswana licolekile, kokukhona ukugcinwa kwamanzi kubhetele. Amasuntswana amakhulu e-cellulose ether edibana namanzi, umphezulu uyanyibilika ngoko nangoko uze wenze ijeli yokusonga izinto ukuze kuthintelwe ukuba iimolekyuli zamanzi zingaqhubeki zingena, ngamanye amaxesha ukuxutywa ixesha elide akunakusasazeka ngokulinganayo, ukwenziwa kwesisombululo esinodaka okanye i-agglomerate. Ukunyibilika kwe-cellulose ether yenye yezinto ekufuneka ukhethe i-cellulose ether. Ukunyibilika kukwayindlela ebalulekileyo yokusebenza kwe-methyl cellulose ether. I-MC yodaka olomileyo ifuna umgubo, umxholo wamanzi aphantsi, kunye nokunyibilika kwe-20% ~ 60% yobukhulu besuntswana ngaphantsi kwe-63um. Ukunyibilika kuchaphazela ukunyibilika kweI-HPMCi-hydroxypropyl methyl cellulose ether. I-MC ecoarse idla ngokuba yi-granular kwaye inokunyibilika lula emanzini ngaphandle kokuhlanganisana, kodwa isantya sokunyibilika sicotha kakhulu, ngoko ke ayifanelekanga ukusetyenziswa kwi-mortar eyomileyo. Kwi-mortar eyomileyo, i-MC isasazeka phakathi kwe-aggregate, izihluzi ezincinci kunye nezinto zokufaka isamente ezifana nesamente, kwaye yi-powder elungileyo kuphela enokuthintela ukuxinana kwe-methyl cellulose ether xa ixutywa namanzi. Xa i-MC yongeza amanzi ekunyibilikiseni i-agglomerate, kunzima kakhulu ukuyichitha nokuyinyibilikisa. I-MC enobunono obucolekileyo ayichithi nje kuphela, kodwa ikwanciphisa amandla engingqi ye-mortar. Xa i-mortar eyomileyo enjalo yakhiwe kwindawo enkulu, isantya sokuphilisa se-mortar eyomileyo yasekuhlaleni sincitshiswa kakhulu, nto leyo ebangela ukuqhekeka okubangelwa lixesha lokunyanga elahlukileyo. Kwi-mortar yokutshiza ngoomatshini, ngenxa yexesha elifutshane lokuxuba, ubunono buphezulu.
Ngokubanzi, okukhona i-viscosity iphezulu, kokukhona isiphumo sokugcina amanzi siba ngcono. Nangona kunjalo, okukhona i-viscosity iphezulu, ubunzima be-molecular ye-MC buphezulu, kwaye ukusebenza kokunyibilika kuya kuncipha ngokufanayo, oku kunempembelelo embi kumandla kunye nokusebenza kolwakhiwo lwe-mortar. Okukhona i-viscosity iphezulu, kokukhona isiphumo sokutyeba se-mortar sibonakala ngakumbi, kodwa asihambelani nolwalamano. Okukhona i-viscosity iphezulu, i-mortar emanzi iya kuba ncamathela ngakumbi, zombini ulwakhiwo, ukusebenza kwe-sticky scraper kunye nokunamathela okuphezulu kwizinto ezisisiseko. Kodwa akuncedi ukwandisa amandla olwakhiwo lwe-mortar emanzi. Ngexesha lokwakhiwa, ukusebenza okuchasene nokuhla akubonakali. Ngokwahlukileyo koko, ezinye ii-viscosity eziphantsi kodwa eziguquliweyo ze-methyl cellulose ethers zisebenza kakuhle ekuphuculeni amandla olwakhiwo lwe-mortar emanzi.
Okukhona i-cellulose ether ingaphezulu kongezwa kwi-mortar, kokukhona ukusebenza kakuhle kokugcinwa kwamanzi, kokukhona i-viscosity iphezulu, kokukhona ukusebenza ngcono kokugcinwa kwamanzi.
Ukuqina kwe-HPMC kunefuthe elithile ekugcinweni kwamanzi, ngokubanzi, ngenxa ye-viscosity efanayo kunye nokuqina okwahlukileyo kwe-methyl cellulose ether, kwimeko yokongeza okulinganayo, kokukhona isiphumo sokugcina amanzi singcono.
Ukugcinwa kwamanzi kwe-HPMC kukwanxulumene nobushushu bokusetyenziswa, kwaye ukugcinwa kwamanzi kwe-methyl cellulose ether kuncipha ngokunyuka kobushushu. Kodwa xa kusetyenziswa izinto, iindawo ezininzi ze-mortar eyomileyo zihlala zikwiqondo lobushushu eliphezulu (elingaphezulu kwama-40 degrees) phantsi kwemeko yokwakhiwa kwi-substrate eshushu, njengokugqunywa kwe-plaster yangaphandle yodonga ehlotyeni, okuhlala kukhawulezisa ukuqina kwesamente kunye nokuqina kwe-mortar eyomileyo. Ukwehla kwezinga lokugcina amanzi kukhokelela kwimvakalelo ecacileyo yokuba zombini ukumelana nokwakhiwa kunye nokuqhekeka kuyachaphazeleka. Kule meko, ukunciphisa impembelelo yezinto zobushushu kuba yinto ebalulekileyo kakhulu. Nangona ukongeza kwe-methyl hydroxyethyl cellulose ether kuthathwa njengento ephambili kuphuhliso lobuchwepheshe, ukuxhomekeka kwayo kubushushu kuya kukhokelela ekwehleni kweempawu ze-mortar eyomileyo. Nangona ukwanda kwe-methyl hydroxyethyl cellulose dosage (ifomula yasehlotyeni), ukumelana nokwakhiwa kunye nokuqhekeka akukwazi ukuhlangabezana neemfuno zokusetyenziswa. Ngonyango oluthile olukhethekileyo lwe-MC, njengokunyusa izinga le-etherification, isiphumo sokugcina amanzi se-MC sinokugcina isiphumo esingcono phantsi kobushushu obuphezulu, ukuze sikwazi ukubonelela ngokusebenza ngcono phantsi kweemeko ezinzima.
Ixesha lokuthumela: Meyi-18-2022