I-HPMC (i-hydroxypropyl methylcellulose) i-thickener kunye ne-stabilizer esetyenziswa ngokuqhelekileyo kwizinto zokwakha, iingubo, amayeza kunye nokutya. I-HPMC 15 cps ithetha ukuba i-viscosity yayo yi-15 centipoise, ibakala eliphantsi le-viscosity.
1. Ukwandisa uxinzelelo lwe-HPMC
Eyona ndlela ichanekileyo kunye nesebenzayo yokwandisa i-viscosity ye-HPMC kukwandisa ukugxila kwayo kwisisombululo. Xa iqhezu lobunzima be-HPMC linyuka, i-viscosity yesisombululo nayo iya kwanda. Ingundoqo yale ndlela kukuba i-HPMC ikwandisa i-viscosity yesisombululo ngokwenza isakhiwo sothungelwano esine-ntathu-dimensional. Njengoko inani leemolekyuli ze-HPMC kwisisombululo sanda, ukuxinana kunye namandla esakhiwo sothungelwano kuya kwanda, ngaloo ndlela kwandisa i-viscosity yesisombululo. Nangona kunjalo, kukho umda wokwandisa ugxininiso. Ukuxinana okuphezulu kakhulu kwe-HPMC kuya kubangela ukuncipha kwesisombululo, kwaye kunokuchaphazela nokusebenza kwayo kwizicelo ezithile, ezinjengokwakha kunye nokusebenza.
2. Lawula ubushushu besisombululo
Ubushushu bunempembelelo enkulu kwi-solubility kunye ne-viscosity ye-HPMC. Kwiqondo lokushisa eliphantsi, i-viscosity yesisombululo se-HPMC iphezulu; ngelixa kubushushu obuphezulu, i-viscosity yesisombululo se-HPMC iya kuncipha. Ngoko ke, ukunciphisa ubushushu besisombululo ngokufanelekileyo ngexesha lokusetyenziswa kunokunyusa i-viscosity ye-HPMC. Kufuneka kuqatshelwe ukuba i-solubility ye-HPMC kwisisombululo iyahluka kumaqondo okushisa ahlukeneyo. Ngokuqhelekileyo kulula ukusabalalisa emanzini abandayo, kodwa kuthatha ixesha elithile ukuchithwa ngokupheleleyo. Ichithwa ngokukhawuleza emanzini afudumeleyo, kodwa i-viscosity iphantsi.
3. Guqula ixabiso le-pH le-solvent
I-viscosity ye-HPMC nayo inovakalelo kwixabiso le-pH yesisombululo. Ngaphantsi kweemeko ezingathathi hlangothi okanye ezikufutshane, i-viscosity yesisombululo se-HPMC iyona nto iphezulu. Ukuba ixabiso le-pH lesisombululo liyaphambuka ekungathathi hlangothi, i-viscosity inokuncipha. Ngoko ke, i-viscosity yesisombululo se-HPMC inokunyuswa ngokulungelelanisa ngokufanelekileyo ixabiso le-pH yesisombululo (umzekelo, ngokongeza i-buffer okanye i-acid-base regulator). Nangona kunjalo, ekusebenzeni okwenyani, uhlengahlengiso lwexabiso le-pH kufuneka lulumke kakhulu, kuba utshintsho olukhulu lunokubangela ukuthotywa kwe-HPMC okanye ukuthotywa kokusebenza.
4. Khetha isinyibilikisi esifanelekileyo
I-solubility kunye ne-viscosity ye-HPMC kwiinkqubo ezahlukeneyo zokunyibilikisa zahlukile. Nangona i-HPMC isetyenziswa ikakhulu kwizisombululo ezinamanzi, ukongezwa kwezinye izinyibilikisi zendalo (ezifana ne-ethanol, isopropanol, njl.) Ngokomzekelo, inani elincinci le-solvent ye-organic linganciphisa ukuphazamiseka kwama-molecule amanzi kwi-HPMC, ngaloo ndlela ikhulise i-viscosity yesisombululo. Kwimisebenzi ethile, kuyimfuneko ukukhetha i-solvents efanelekileyo ye-organic ngokwesicelo sangempela.
5. Sebenzisa izixhobo zokujiya
Kwezinye iimeko, ezinye izixhobo ezityebisayo zingongezwa kwi-HPMC ukuphumeza umphumo wokwandisa i-viscosity. Ngokuqhelekileyo ezisetyenziselwa ukutyebisa zibandakanya xanthan gum, guar gum, carbomer, njl. Ezi zongezo zisebenzisana neemolekyuli zeHPMC ukwenza ijeli eyomeleleyo okanye isakhiwo sothungelwano, ngakumbi ukwandisa i-viscosity yesisombululo. Ngokomzekelo, i-xanthan gum yi-polysaccharide yendalo kunye nefuthe eliqinileyo lokuqina. Xa isetyenziswe kunye ne-HPMC, ezi zimbini zingenza i-synergistic effect kwaye zandise kakhulu i-viscosity yenkqubo.
6. Guqula iqondo lokutshintshwa kwe-HPMC
I-viscosity ye-HPMC nayo inxulumene neqondo lokuthatha indawo ye-methoxy kunye namaqela e-hydroxypropoxy. Iqondo lokutshintshwa lichaphazela ukunyibilika kwayo kunye ne-viscosity yesisombululo. Ngokukhetha i-HPMC enemigangatho eyahlukeneyo yokutshintsha, i-viscosity yesisombululo inokulungiswa. Ukuba i-viscosity ephezulu ye-HPMC iyadingeka, imveliso enomxholo ophezulu we-methoxy inokukhethwa, kuba iphakamileyo umxholo we-methoxy, i-hydrophobicity ye-HPMC inamandla, kwaye i-viscosity emva kokuchithwa iphezulu.
7. Yandisa ixesha lokupheliswa
Ixesha apho i-HPMC inyibilika nayo iya kuchaphazela i-viscosity yayo. Ukuba i-HPMC ayichithwanga ngokupheleleyo, i-viscosity yesisombululo ayiyi kufikelela kwindawo efanelekileyo. Ngoko ke, ukwandisa ngokufanelekileyo ixesha lokuchithwa kwe-HPMC emanzini ukuqinisekisa ukuba i-HPMC ifakwe ngokupheleleyo emanzini inokunyusa ngokufanelekileyo i-viscosity yesisombululo sayo. Ingakumbi xa inyibilika kumaqondo obushushu aphantsi, inkqubo yokupheliswa kwe-HPMC inokucotha, kwaye ukwandisa ixesha kubalulekile.
8. Guqula iimeko zokucheba
I-viscosity ye-HPMC ikwanxulumene namandla okucheba ephantsi kwayo ngexesha lokusetyenziswa. Ngaphantsi kweemeko eziphezulu zokucheba, i-viscosity yesisombululo se-HPMC iya kuncipha okwethutyana, kodwa xa i-shear iyeka, i-viscosity iya kubuyiselwa. Kwiinkqubo ezifuna ukunyuka kwe-viscosity, i-shear force apho isisombululo sixhomekeke khona sinokuncitshiswa, okanye sinokusebenza phantsi kweemeko eziphantsi zokucheba ukuze kugcinwe i-viscosity ephezulu.
9. Khetha ubunzima obufanelekileyo bemolekyuli
Ubunzima bemolekyuli ye-HPMC ichaphazela ngqo i-viscosity yayo. I-HPMC enobunzima obukhulu bemolekyuli yenza ulwakhiwo lwenethiwekhi enkulu kwisisombululo, okukhokelela kwi-viscosity ephezulu. Ukuba ufuna ukwandisa i-viscosity ye-HPMC, ungakhetha iimveliso ze-HPMC ezinobunzima obuphezulu be-molecular. Nangona i-HPMC 15 cps iyimveliso ye-viscosity ephantsi, i-viscosity inokunyuswa ngokukhetha i-high-molecular-weight-weight yemveliso efanayo.
10. Qwalasela iimeko zokusingqongileyo
Izinto zokusingqongileyo ezifana nokufuma kunye noxinzelelo nazo zinokuba nefuthe elithile kwi-viscosity yesisombululo se-HPMC. Kwindawo yokufuma okuphezulu, i-HPMC inokufunxa ukufuma emoyeni, ibangele ukuba i-viscosity yayo yehle. Ukuze ugweme oku, iimeko zokusingqongileyo zemveliso okanye ukusetyenziswa kwendawo zingalawulwa ngokufanelekileyo ukugcina indawo eyomileyo kunye noxinzelelo olufanelekileyo lokugcina i-viscosity yesisombululo se-HPMC.
Kukho iindlela ezininzi zokwandisa i-viscosity yesisombululo se-HPMC 15 cps, kubandakanywa ukwanda koxinaniso, ukulawula ubushushu, ukulungisa i-pH, ukusebenzisa izixhobo zokuncedisa ukuqina, ukukhetha iqondo elifanelekileyo lokutshintshwa kunye nobunzima be-molecular, njl. Kumsebenzi wokwenyani, kudla ngokuba yimfuneko ukuba kuqwalaselwe ngokubanzi izinto ezininzi kwaye wenze uhlengahlengiso olufanelekileyo kunye nokulungelelaniswa kokuqinisekisa ukusebenza kakuhle kwesisombululo se-HPMC kwizicelo ezithile.
Ixesha lokuposa: Oct-16-2024