I-HPMC (i-hydroxypropyl methylcellulose) yi-non-ionic cellulose ether esetyenziswa kakhulu kulwakhiwo, amayeza, ukutya, iikhemikhali zemihla ngemihla nakwamanye amashishini. Ngokwendlela yayo yokunyibilika kunye neempawu zokusetyenziswa, i-HPMC inokwahlulwa ibe ziintlobo ezimbini: uhlobo olukhawulezileyo kunye nohlobo lokunyibilika okushushu. Kukho umahluko omkhulu phakathi kwezi zimbini ngokwenkqubo yemveliso, iimeko zokunyibilika kunye neemeko zokusetyenziswa.
1. I-HPMC ekhawulezileyo
I-HPMC ekhawulezileyo, ekwabizwa ngokuba yi-cold water soluble type, inokunyibilika ngokukhawuleza emanzini abandayo ukuze yenze isisombululo se-colloidal esibonakalayo. Iimpawu zayo eziphambili zezi zilandelayo:
1.1. Ukunyibilika
I-HPMC ekhawulezileyo inyibilika kakuhle emanzini abandayo kwaye isasazeka ngokukhawuleza xa ibekwe emanzini. Inokunyibilika ngexesha elifutshane ukuze yenze isisombululo esifanayo, ngesiqhelo ngaphandle kwesidingo sokufudumeza. Isisombululo sayo samanzi sinokukhanya okuhle, uzinzo kunye nokukwazi ukulungisa i-viscosity.
1.2. Iimeko zokusetyenziswa
I-HPMC ekhawulezileyo isetyenziswa kakhulu kwiimeko ezifuna ukunyibilika ngokukhawuleza kunye nokwenziwa kwesisombululo. Iindawo eziqhelekileyo zokusetyenziswa ziquka:
Intsimi yokwakha: isetyenziswa njengearhente yokugcina amanzi kunye nearhente yokuqinisa izinto ezisekwe kwisamente kunye neemveliso zegypsum ukunceda ukuphucula ukusebenza kolwakhiwo.
Iimveliso zeekhemikhali zemihla ngemihla: ezifana neesepha, iishampu, izinto zokuthambisa, njl.njl., i-HPMC ekhawulezileyo inokubonelela ngemiphumo yokuqina kunye nokuxhonywa kweemveliso, kwaye inyibilike ngokukhawuleza, nto leyo eyenza ifaneleke kwimicimbi yokulungiselela ngokukhawuleza.
Ishishini lamayeza: Lisetyenziswa njengesixhobo sokwenza ifilimu, into yokuncamathelisa, njl.njl. kwiipilisi. Linokunyibilikiswa ngokukhawuleza emanzini abandayo ukuze kube lula ukuvelisa amalungiselelo.
1.3. Iingenelo
Inyibilika ngokukhawuleza kwaye ifanelekile kwiimeko zokuyilungisa kubanda.
Kulula ukuyisebenzisa kwaye ibanzi kwaye ingasetyenziswa.
Isisombululo sinokubonakala okuphezulu kunye nozinzo oluhle.
2. I-HPMC enyibilikisiweyo eshushu
I-HPMC enyibilikayo, eyaziwa ngokuba yi-hot-water soluble type okanye i-delayed-dissolution type, kufuneka inyibilike ngokupheleleyo emanzini ashushu, okanye ingadinga ixesha elide lokunyibilika emanzini abandayo ukuze yenze isisombululo kancinci kancinci. Iimpawu zayo zezi zilandelayo:
2.1. Ukunyibilika
Indlela yokunyibilika kwe-HPMC enyibilikayo i-hot-melt yahluke kakhulu kweyohlobo olukhawulezileyo. Kumanzi abandayo, i-HPMC enyibilikayo i-hot-melt iyasasazeka kuphela kodwa ayinyibiliki. Iyanyibilika kuphela kwaye yenze isisombululo xa ishushu ukuya kubushushu obuthile (ngesiqhelo malunga nama-60°C). Ukuba yongezwa emanzini abandayo kwaye ixutywe rhoqo, i-HPMC iya kufunxa amanzi kancinci kancinci ize iqale ukunyibilika, kodwa inkqubo iyacotha.
2.2. Iimeko zokusetyenziswa
I-HPMC enyibilikayo isetyenziswa kakhulu kwiimeko apho ixesha lokunyibilika okanye iimeko ezithile zokucubungula ubushushu kufuneka zilawulwe. Iindawo eziqhelekileyo zokusetyenziswa ziquka:
Izinto zokwakha: ezifana nezincamathelisi zokwakha, ii-mortars zokuplasta, njl.njl., i-HPMC enyibilikayo inokubangela ukulibaziseka kokunyibilika, inciphise ukuhlangana ngexesha lokuxuba okanye ukuxuba, kwaye iphucule ukusebenza kolwakhiwo.
Ishishini lamayeza: Njengezinto zokugquma iipilisi ezikhutshwa rhoqo, njl.njl., i-HPMC enyibilikayo inceda ekulawuleni izinga lokukhululwa kwamayeza ngokusebenzisa iipropati zayo zokunyibilika kumaqondo obushushu ahlukeneyo.
Ishishini lokugquma: lisetyenziselwa ukufakelwa uboya phantsi kweemeko ezithile zobushushu obuphezulu ukuqinisekisa ukwakheka kwefilimu egqwesileyo kunye nozinzo ngexesha lenkqubo yokwakha.
2.3. Iingenelo
Ingalibazisa ukuchithwa kwaye ifanelekile kwiimeko ezineemfuno ezikhethekileyo malunga nesantya sokuchithwa.
Ithintela ukuhlangana kwamanzi abandayo kwaye isebenza kakuhle ekusasazekeni.
Ifanelekile ekusetyenzisweni kobushushu okanye ekusetyenzisweni apho kufuneka ulawulo lwenkqubo yokunyibilika.
3. Umahluko ophambili phakathi kohlobo olukhawulezileyo nohlobo olushushu olunyibilikayo
3.1. Iindlela ezahlukeneyo zokunyibilikisa
I-HPMC ekhawulezileyo: Inganyibilika ngokukhawuleza emanzini abandayo ukuze yenze isisombululo esicacileyo, esilula nesikhawulezayo ukusisebenzisa.
I-HPMC enyibilikayo ngokushushu: Kufuneka inyibilikiswe emanzini ashushu okanye inyibilikiswe ngokupheleleyo emanzini abandayo ixesha elide, nto leyo efanelekileyo kwiimfuno ezithile zolawulo lokunyibilika.
3.2. Umahluko kwiinkalo zesicelo
Ngenxa yeempawu zayo zokunyibilika ngokukhawuleza, i-HPMC ekhawulezileyo ifanelekile kwiimeko apho isisombululo kufuneka senziwe ngoko nangoko, njengokwakhiwa kunye nokulungiswa kwemveliso yemichiza yemihla ngemihla. I-HPMC enyibilikayo isetyenziswa kakhulu kwiimeko apho kufuneka ukunyibilika okulibazisekileyo, ingakumbi kwiindawo zokwakha ezinobushushu obuphezulu okanye kwiindawo ezineemfuno ezingqongqo zexesha lokunyibilika.
3.3. Umahluko kwinkqubo yemveliso
Ngexesha lenkqubo yokuvelisa, i-HPMC ekhawulezileyo iguqulwa ngokweekhemikhali ukuze inyibilike ngokukhawuleza emanzini abandayo. I-HPMC enyibilikayo igcina iipropati zayo zokuqala kwaye kufuneka inyibilike emanzini ashushu. Ke ngoko, kwizicelo zokwenyani zokuvelisa, kuyimfuneko ukukhetha uhlobo olufanelekileyo lwe-HPMC ngokweemeko ezahlukeneyo zenkqubo kunye neemfuno zemveliso.
4. Izinto ekufuneka ziqwalaselwe xa ukhetha i-HPMC
Xa ukhetha ukusebenzisa i-HPMC enyibilikayo ngokukhawuleza okanye eshushu, kufuneka wenze isigqibo ngokusekelwe kwiimfuno ezithile zesicelo:
Kwiimeko ezifuna ukunyibilika ngokukhawuleza: njengezinto zokwakha ezifuna ukusetyenziswa ngoko nangoko ngexesha lokuveliswa, okanye iimveliso zeekhemikhali zemihla ngemihla ezilungiswa ngokukhawuleza, i-HPMC enyibilika ngokukhawuleza kufuneka ikhethwe.
Kwiimeko ezifuna ukunyibilika okulibazisekileyo okanye ukucutshungulwa kobushushu: ezifana neemortars, ii-coatings, okanye iipilisi ezikhutshwa ngamayeza ezihlala ixesha elide ezifuna ukulawula izinga lokunyibilika ngexesha lokwakhiwa, kufuneka kukhethwe i-HPMC enyibilikayo ngobushushu.
Kukho umahluko ocacileyo ekusebenzeni kokunyibilika kunye neendawo zokusetyenziswa phakathi kwe-HPMC ekhawulezileyo kunye ne-HPMC enyibilikayo. Uhlobo olukhawulezileyo lufanelekile kwizicelo ezifuna ukunyibilika ngokukhawuleza, ngelixa uhlobo olunyibilikayo olushushu lufanelekile ngakumbi kwiimeko ezifuna ukunyibilika okulibazisekileyo okanye ukucutshungulwa kobushushu. Kwizicelo ezithile, ukukhetha uhlobo olufanelekileyo lwe-HPMC kunokuphucula ukusebenza kakuhle kwemveliso kunye nokwenza ngcono ukusebenza kwemveliso. Ke ngoko, kwimveliso yokwenyani nokusetyenziswa, kuyimfuneko ukukhetha ngokufanelekileyo uhlobo lwe-HPMC ngokusekelwe kwiimeko ezithile zenkqubo kunye neemfuno zemveliso.
Ixesha leposi: Sep-25-2024