Hydroxypropyl methylcelculose (hpmc)Ngaba i-polymer ye-polymer ye-polymer yasetyenziswa ngokubanzi ekwakhiweni, amayeza, ukutya kunye ne-cosmetics. Kwimeko enomswakama, ukwenziwa kwe-HPMC kuchaphazeleke zizinto ezininzi, kwaye iimpawu zayo zichonge ukuziqhelanisa nokuzimela kwizicelo ezahlukeneyo.
1. Hygroscopicicicity
I-HPMC yindawo ye-hydrophilic enombala oqinileyo. Kwimeko enomswakama, i-HPMC inokufumana umswakama emoyeni, ebhalwe ikakhulu kwi-hydroxyl ye-hydroxyl kunye ne-mayipxy kwimo yayo yeemolekyuli. Olu hygroscopicity lubangela ungqingi lwefilimu yamanzi ukuba yenze umphezulu we-HPMC, esenza ibonise ukuba uluthando lube ngcono kunye nonethenya. Le ndawo ibaluleke kakhulu kwizinto zokwakha. Umzekelo, kwi-tile ukubambelela kunye ne-pocebler, i-HPMC inokuphucula ukusebenza nokugcinwa kwamanzi kwimveliso.
Nangona kunjalo, i-hygroscoficity egqithisileyo inokubangela iingxaki kwezinye iinkqubo. Umzekelo, xa i-HPMC isetyenziswa njenge-matrix yokukhutshwa kwe-matrix kwiitafile ezenziwe ngamachiza, ukugqithisa amanzi amaninzi kunokutshintsha umgangatho wokukhutshwa ngamachiza kwaye kuchaphazele ukuzinza kweziyobisi. Ke ngoko, kwindawo enomswakama, uyilo lwe-HPMC kufuneka unike ingqalelo ekhethekileyo kwi-hygroscopic indlela yokuziphatha.
2. Uzinzo
I-HPMC ngokubanzi ibonisa uzinzo lweekhemikhali kwimimandla emdaka. Ngenxa yokuguqulwa okukhethekileyo kwe-molecular ye-molecular, i-HPMC izinzile ezikwimo zombini ze-AID kunye neAlkaline kwaye azinanzi ukonakaliswa okukhulu okanye ukuphendula ngemichiza phantsi komswakama okuphezulu. Nangona kunjalo, ukufuma okuphezulu kunokuba nefuthe elithile kwizikhundla zalo zomzimba. Umzekelo, inqanaba lokuphelisa i-HPMC linokukhawulezisa, kwaye uphawu lwalo lwe-viscosity lunokutshintsha ngenxa yokufumana umswakama.
Kwizicelo zokwakha, iindawo eziphakamileyo zokufuma zinokubangela ireyithi yokuzibongoza kwamanzi kwi-HPMC Ngamanye amaxesha, oku kunokuba yingenelo kuba kubonelela ngexesha elinde. Nangona kunjalo, ukhula olugqithisileyo kunokukhokelela ekunciphiseni amandla emva kokukoma okanye ukugqobhoza kumphezulu.
3. Ukugcinwa kwamanzi
I-HPMC ineepropathi ezigqwesileyo zamanzi kwiindawo ezinomswakama. Le mpahla iyenza ibe yinto ebonakalayo kwishishini lokwakha. Umzekelo, ngexesha lenkqubo yokuhlambela i-Wall, i-HPMC inokuthintela ngokufanelekileyo ukuphulukana nokukhawulezisa amanzi, ngaloo ndlela udaka kunexesha elaneleyo lokugqibezela ukuphendula ngomzimba kunye nokuphucula umgangatho wokwakha. Kwimeko enomswanam, lo mgangatho wokugcinwa kwamanzi unokuphuculwa ngakumbi kuba umswakama kwindalo ubonelela ngomthombo ongezelelweyo wokufuma komxholo.
I-4. Ukusekwa kwefilimu
Isakhono sokwenza ifilimu se-HPMC sepapashwe ikakhulu kwimimandla enomswakama. Xa isisombululo se-HPMC siboniswe kumoya ngokufuma okuphakathi okuphezulu, izinga lokuphumeza kwamanzi liyacotha, ukukhuthaza ukwenziwa kwefilimu yefilimu. Le filimu iguquguquka kakuhle kwaye ixhathise ukuxhathisa, kwaye inokunika ukumelana nokunganyangeki kwe-rack kunye neepropathi zamanzi. Kwindawo yokutya kunye namachiza amayeza, iifilimu ze-HPMC zinokusetyenziselwa ukuqeqesha nokukhusela izithako ezibuthathaka kwimpembelelo yendawo enomswakama.
5. Amanyathelo okusebenza kwizicelo
Ukwenzela ukuba isebenze i-HPMC kwiindawo ezinomswakama, kwamkelwa iindlela ezahlukeneyo zokulungiswa kwimimandla eyahlukeneyo yesicelo. Umzekelo, ngokuhlengahlengisa inqanaba lokufakwa endaweni ye-HPMC, i-hygroscoficicciciciction kunye neempawu ze-viscosity zinokutshintshwa; Kwizinto zokwakha, uzinzo lwayo kwimimandla emnyangwe unokuphuculwa ngakumbi ngokudibanisa ezinye iisongezo (njengomgubo we-testax okanye i-tickener).
Ukwenziwa kweI-HPMCKwindawo ezinomswakatha ezichaphazeleka zizinto ezininzi. I-hygroscoficity yayo, ukugcinwa kwamanzi kunye nokwakha ifilimu kwenza ukuba ibonise ixabiso elifanelekileyo lesicelo kwimimandla yokwakha, amayeza kunye nokutya. Nangona kunjalo, iindawo eziphakamileyo zokufuma zinokuzisa imiceli mngeni enokubakho, ekufuneka iqwalaselwe ngohlobo lwesayensi loyilo kunye neendlela zokuguqulwa. Ngokufunda ngokunzulu i-HPMC kwindawo enomswana, iimpawu zayo zinokubonakala ngcono ukuba zifezekise iimfuno zamasimi awahlukeneyo.
I-POSTAL: I-DEC-24 ukuya kwi-2024