I-HPMC (i-Hydroxypropyl Methyl Cellulose) yinto eqhelekileyo ephuma kwi-cellulose esetyenziswa ngokubanzi kwiindawo ezininzi zemizi-mveliso, ngakumbi kulawulo lwe-viscosity kunye neempawu zokujiya. Ngenxa yobume bekhemikhali eyodwa kunye neempawu zomzimba, i-HPMC inokuphucula ngokufanelekileyo i-viscosity, uzinzo kunye neepropati ze-rheological yeemveliso zoshishino. Ngoko ke, isetyenziswe ngokubanzi kwiingubo, izinto zokwakha, iziyobisi, izimonyo, ukutya kunye nezinye iindawo.
Iimpawu eziphambili ze-HPMC
I-HPMC yimathiriyeli yepolymer eyenziwe kwiselulosi yendalo eguqulwe ngokwekhemikhali. Ikhonkco layo le-molekyuli liqukethe amaqela e-hydrophilic kunye namaqela e-hydrophobic, ngoko ke ine-solubility efanelekileyo yamanzi kunye nokuhambelana kwe-solvent ye-organic. Inyibilika emanzini abandayo ukwenza isisombululo se-viscous esicacileyo okanye esicacileyo. Iimpawu eziphambili zeHPMC ziquka:
Iipropathi ezigqwesileyo zokujiya: I-HPMC inokunyusa kakhulu i-viscosity yezisombululo kwiindawo eziphantsi, inika iziphumo eziphezulu zokuxinana. Oku kuyenza ibe sisithako esiyimfuneko kwiimveliso zoshishino ezifana nemathiriyeli yokwakha kunye neengubo zokwaleka ukuphucula ukusebenza kwesicelo semveliso.
Ulawulo lwe-viscosity elungileyo: I-HPMC inokufikelela kulawulo oluchanekileyo lwe-viscosity ngokulungelelanisa ubunzima bayo bemolekyuli kunye neqondo lokutshintshwa (njenge-methoxy kunye ne-hydroxypropyl substitution rates) ukuhlangabezana neemfuno zeemeko ezahlukeneyo zesicelo. Ngokomzekelo, kwishishini lokugquma, i-HPMC enee-viscosities ezahlukeneyo inokubonelela ngemigangatho eyahlukeneyo kunye nokusebenza kweengubo.
Uhlengahlengiso olugqwesileyo lwe-rheological: Iimpawu ze-rheological ze-HPMC zinokutshintsha ngotshintsho kwireyithi yokucheba. Oku kuthetha ukuba xa i-static, yenza isakhiwo se-viscous esiphezulu, kwaye i-viscosity iyancipha xa imikhosi yokucheba isetyenzisiweyo (efana nokuvuselela okanye ukutshiza), okwenza imveliso ibe lula ukuyisebenzisa. Phakathi kwezinye izinto zomgangatho wokuziphakamisa, olu phawu lwe-HPMC lubaluleke kakhulu.
I-biocompatibility efanelekileyo kunye ne-non-toxicity: I-HPMC ithathwe kwi-cellulose yendalo, i-biocompatibility efanelekileyo, ayinayo ityhefu, ayicaphuki, kwaye ihlangabezana neemfuno zokusingqongileyo. Ngoko ke, ineemfuno eziphezulu zokhuseleko kwi-cosmetics, iziyobisi, ukutya, njl njl. Ikwasetyenziswa ngokubanzi kwiindawo eziphezulu.
Indlela yokujiya ye-HPMC kwiimveliso zoshishino
Iipropati ezityebileyo ze-HPMC zibangelwa ubukhulu becala kulwakhiwo lwemolekyuli kunye nokusebenzisana kweemolekyuli kwisisombululo. Xa i-HPMC inyibilika emanzini okanye kwezinye izinyibilikisi, amatyathanga ayo macromolecular aya kutyhilwa kwaye enze iibhondi ezomeleleyo ze-hydrogen kunye ne-van der Waals imikhosi eneemolekyuli ezinyibilikayo, ngaloo ndlela inyusa i-viscosity yenkqubo. Ukongeza, ubume bothungelwano obunemigangatho emithathu eyenziwe yi-HPMC kwisisombululo ikwasisitshixo ekusebenzeni kwayo kokuqina. Amatyathanga eemolekyuli kwisisombululo se-HPMC adityanisiwe ukuze enze isakhiwo sothungelwano, esinciphisa umbane wesisombululo kwaye ngaloo ndlela sibonise i-viscosity ephezulu.
Kwiimeko ezahlukeneyo zesicelo, i-viscosity ye-HPMC inokulungiswa ngolu hlobo lulandelayo:
Ukulungiswa kobunzima bemolekyuli: I-viscosity ye-HPMC idla ngokulingana nobunzima bayo bemolekyuli. Ubukhulu be-molecular weight, buphezulu i-viscosity yesisombululo. Ngoko ke, ngokukhetha iimveliso ze-HPMC ezinobunzima obuhlukeneyo beemolekyuli, izisombululo ezine-viscosities ezahlukeneyo zinokufumaneka ukuhlangabezana neemfuno zeemveliso ezahlukeneyo zamashishini.
Ulawulo lweqondo lokutshintsha: Isiphumo sokutyeba se-HPMC sikwanxulumene ngokusondeleyo neqondo lokutshintsha. Ukuphakama kweqondo lokutshintshwa, komelele i-hydrophilicity kwaye ingcono isiphumo sokuqina. Ngokulawula umgangatho wokutshintshwa kwe-HPMC's methoxy kunye namaqela e-hydroxypropyl, iimpawu zayo ze-viscosity zingalawulwa ngokuchanekileyo.
Impembelelo yoxinzelelo lwesisombululo: Ukuxinwa kwe-HPMC kwisisombululo kuchaphazela ngqo i-viscosity yayo. Ngokuqhelekileyo, okukhona ugxininiso lwesisombululo, lukhulu ngakumbi i-viscosity. Ke ngoko, ngokulungelelanisa uxinaniso lwe-HPMC, ulawulo oluchanekileyo lwe-viscosity yesisombululo lunokufezekiswa.
Iindawo zokusetyenziswa kunye neziphumo ezityebileyo ze-HPMC
Izinto zokwakha: I-HPMC isoloko isetyenziswa njenge-thickener kunye ne-viscosity regulator kwi-samente-based mortars, i-adhesives ye-tile, kunye nezixhobo zomgangatho wokuzimela kwizinto zokwakha. Umphumo wayo wokuqina wandisa ukugcinwa kwamanzi kwezi zixhobo, uphucula ukusebenza kwazo, kwaye unqande ukuqhekeka okanye ukuncipha. Ngokukodwa kwiindawo ezinobushushu obuphezulu, i-HPMC inokwandisa kakhulu ixesha lokuvulwa kwezinto kunye nokwandisa ukusebenza kwayo.
Iingubo kunye neepeyinti: Kwishishini lokugquma, i-HPMC isetyenziswa njenge-ejenti engqingqwa kunye ne-ejenti yokuxhoma ukunyusa ukuncamathelwa kweengubo kunye nokuphucula umgangatho wazo kunye nokuxhathisa kwe-sag ngexesha lokugquma. Kwangaxeshanye, i-HPMC inokunceda ipeyinti igcine ukuhanjiswa kwamasuntswana afanayo, kuthintele ukuhlaliswa kwebala, kwaye yenze ifilimu yokugquma igude kwaye ifane ngakumbi.
Iziyobisi kunye neZithambiso: Kumalungiselelo amayeza, i-HPMC isoloko isetyenziselwa ukulawula izinga lokukhululwa kwamachiza, njengezinto zokugquma ithebhulethi kunye neegobolondo ze-capsule. Iimpawu zayo ezintle zokuqina zinceda ukuphucula ukuzinza kweyeza kunye nokwandisa ixesha lesiphumo seziyobisi. Kwizinto zokuthambisa, i-HPMC isetyenziswa ngokubanzi kwi-lotions, iikhrimu, ii-conditioners kunye nezinye iimveliso ukunyusa i-viscosity kunye nozinzo lwemveliso ngelixa uphucula ukuvakalelwa kwe-silky kunye nesiphumo sokufuma xa sisetyenziswa.
Ishishini lokutya: I-HPMC iqhele ukusetyenziswa kushishino lokutya njengento etyebisayo kunye nokuzinzisa, ngakumbi kwiimveliso zobisi, iicondiments, iijeli neziselo. Iimpawu zayo ezingenayo ityhefu kunye nezingenavumba zenza ukuba ibe yinto ekhuselekileyo kunye nethembekileyo yokutyeba ephucula ukuthungwa kunye nomlomo wokutya.
I-HPMC iye yaba yinto eyimfuneko esebenzayo kwiimveliso zemizi-mveliso zanamhlanje ngenxa yokusebenza kwayo okugqwesileyo kokuqina kunye namandla okulawula i-viscosity. Ngokuhlengahlengisa ubunzima bayo bemolekyuli, iqondo lokutshintshwa kunye noxinzelelo lwesisombululo, i-HPMC inokuhlangabezana neemfuno ze-viscosity yeemveliso ezahlukeneyo zamashishini. Kwangaxeshanye, iipropati zayo ezingenabungozi, ezikhuselekileyo kunye nokusingqongileyo ziye zenza ukuba zisetyenziswe ngokubanzi kukutya, amayeza kunye nezithambiso kunye nezinye iindawo. Kwixesha elizayo, ngenkqubela phambili eqhubekayo yesayensi kunye nethekhnoloji, iimeko zokusetyenziswa kwe-HPMC ziya kuba banzi, kwaye iingenelo zayo kulawulo lwe-viscosity kunye nokusebenza okujiyileyo ziya kuphononongwa kwaye zisetyenziswe.
Ixesha lokuposa: Sep-25-2024