Ama-adhoscyproppropyl methylcellulose (HPMC) athole ukunakwa okubanzi kuyo yonke imboni ehlukahlukene ngenxa yokusebenza kwawo kanye nobungane bezemvelo. Le ndatshana ihlinzeka ngesibukezo esibanzi sokwakheka kanye nezakhiwo ze-HPMC adhesives. Isakhiwo samangqamuzana se-HPMC, inqubo yaso yokukhiqiza, nezinto ezithinta izakhiwo ezinamathela kuxoxwa ngazo. Ngokwengeziwe, ihlole izakhiwo ezinamathela ze-HPMC ezisetshenzisweni ezahlukahlukene kanye nezinzuzo zayo ngaphezu kokunamathela kwendabuko.
I-Hydroxypropylmethylcellellellellellulose (HPMC) isetshenziswa kabanzi ezimbonini ezahlukahlukene, kufaka phakathi amakhambi, ukudla, ukwakha kanye nokunamathela. Ama-HPMC anama-adhesives athola ukuthandwa njengendlela ehlukile yemvelo yokunamathela kwendabuko ngenxa yemvelo yawo ye-biodegradable kanye nezakhiwo ezinhle kakhulu.
1.Ukwakhiwa nokwakheka kwamangqamuzana kwe-HPMC:
I-HPMC ihlelwe kusuka ku-cellulose, i-polysaccharide etholakala ezindongeni zeseli zezitshalo. Ukuguqulwa kwamakhemikhali kwe-cellulose kufaka phakathi ukushefa kwamaqembu we-hydroxy ane-opylene oxide kanye ne-methylation nge-methyl chloride ukwakha ama-hydroxypropylyl kanye namaqembu we-metholly ngokulandelana. Izinga lokufaka esikhundleni (DS) le-Hydroxypropyl kanye namaqembu we-metholy angahluka, okuholela kumabanga ahlukene we-HPMC anezakhiwo ezahlukahlukene.
Ukwakheka kwamangqamuzana kwe-HPMC kuqukethe amaketanga aqondile ama-glucose amayunithi axhumene ne-β (1 → 4) amabhondi e-glycosidic. Ukuba khona kwe-hydroxypropyl kanye ne-methoxy faka esikhundleni se-cellulose chain edlulisela i-solubity emanzini futhi kuthuthukisa izakhiwo ezakha amafilimu. Iphethini yokufaka esikhundleni sokufaka esikhundleni somthelela othonya i-viscosity, i-solubility, kanye nokuziphatha kwe-gel ye-HPMC ngakho-ke ukufaneleka kwayo kwezicelo ezinamathela.
Inqubo yokukhiqiza yokukhiqiza ye-2.HPMC yokukhiqiza:
Izikhangiso ze-HPMC zivame ukulungiswa ngokusabalalisa i-HPMC powder emanzini noma i-solvent ukwakha isixazululo se-viscous. Inqubo yokuhlakazeka ifaka i-hydration yezinhlayiya ze-HPMC, okuholela ekwakhekeni kokumiswa kwe-colloidal. I-viscosity yesisombululo se-Binder ingashintshwa ngokulawula ukugxila kanye nezinga lokufaka esikhundleni se-HPMC.
Kwezinye izimo, amapulasitiki afana ne-glycerol noma i-sorbibitlol angangezwa ukuthuthukisa ukuguquguquka namandla e-bond. Ama-ejenti axhumanisa aqamba anjenge-borax noma usawoti wensimbi nawo angasetshenziswa ukuthuthukisa amandla ahlanganayo anama-HPMC anama-adhesives. Ukwakheka okunamathela kungaze kwenziwe ngokwezifiso ngokungeza izengezo ezifana nezikhonzi, ama-surfactants noma amakhulu ekwazi ukwenza kahle izakhiwo ezithile.
3. Izici ezithinta ukusebenza okunamathelayo:
Izakhiwo ezinamathelayo ze-HPMC zithintwa yizici eziningi, kufaka phakathi isisindo samangqamuzana, izinga lokufaka esikhundleni, okuhlushwa, izinga lokushisa kanye nezimo zelapha. Isisindo esiphakeme samangqamuzana kanye nezinga lokufakwa esikhundleni ngokuvamile kuba nomphumela wokuvuleka okubonakalayo namandla e-bond. Kodwa-ke, ukufakwa esikhundleni ngokweqile kungaholela ekuhlukaniseni kwe-gelation noma isigaba sesigaba, okuthinta izakhiwo ezinamathela.
Ukuhlushwa kwe-HPMC ekwakhekeni okunamathela kuthinta i-viscosity, ukunamathela nesikhathi sokusoma. I-PH NOKUZIMALI Ithinta i-solubity kanye nokuziphatha kwe-gel ye-HPMC, ngezimo ezisezingeni eliphakeme ziyehluka ngokuya ngezidingo ezithile zebanga kanye nezicelo. Izimo zokwelapha, njengesikhathi sokusoma kanye nokushisa, kungathinta ukuthuthukiswa kokunamathela kanye nokwakheka kwefilimu.
4. Adhesion Properties we-HPMC:
Ukunamathela kwe-HPMC kukhombisa izakhiwo ezinhle kakhulu zokubopha izibopho ezinhlobonhlobo zama-substrate, kufaka phakathi iphepha, izinkuni, izindwangu, ubumbahema nama-ceramics namapulasitiki. Ama-Adhesive wome ukwenza isibopho esiguqukayo futhi esihlala isikhathi eside ngokumelana kahle nomswakama, ukushisa kanye nokuguga. Izikhangiso ze-HPMC nazo zinophunga eliphansi, okungelona ubuthi, futhi zihambisana nezinye izengezo.
Emaphepheni nasekupakisheni izinhlelo, izikhangiso ze-HPMC zisetshenziselwa amalebula, ukubekwa uphawu kwe-carton kanye nokukhanya ngenxa yamandla abo aphezulu okuqala kanye namandla e-bond. Emkhakheni wezokwakha, ukunamathela kwe-tile esekwe ku-HPMC, ukufakwa ngodaka kanye nezinhlanganisela ezihlangene kuhlinzeka ukusebenza okuhle kakhulu kokwakha, ukunamathela kanye nezinto zokugcina amanzi. Ekunyatheliseni kwendwangu, abakhulikhali be-HPMC basetshenziselwa ukulawula i-viscosity futhi bathuthukise ukucaca okucacile.
I-5. Izinzuzo ze-HPMC Adhesive:
Ukunamathela kwe-HPMC kunikeza izinzuzo eziningana ngaphezu kokunamathela kwendabuko, kubenza bakhethe ukukhetha kwezicelo eziningi. Okokuqala, i-HPMC isuselwa emithonjeni yezinsizakusebenza ezivuselelekayo futhi iyinto ebonakalayo, inciphisa umthelela wayo emvelweni. Okwesibili, ama-HPMC anama-adhesives anenobuthi obuphansi kanye ne-allergenic amandla, abenze baphephe ukuze basebenzise ukufakwa kokudla kanye nezicelo zezokwelapha.
Adhesives we-HPMC adinga ukulungiselela okungaphezulu komhlaba futhi anikeze ukunamathela okuhle kakhulu ezinhlotsheni ezahlukahlukene, kufaka phakathi izinto zomoya ezingezinhle. Zimelana kakhulu namanzi, amakhemikhali kanye nemisebe ye-UV, ukuqinisekisa ukuqina nokusebenza kwesikhathi eside. Ngaphezu kwalokho, ukunamathela kwe-HPMC kungenziwa kwakhiwa ukuze kuhlangatshezwane nezidingo ezithile ezifana nokwelashwa okusheshayo, ukumelana okuphezulu noma ukuphefumula okuphansi kwe-VOC.
6. Amathemba wesikhathi esizayo nenqubekela phambili:
Isidingo esikhulayo semikhiqizo ezinzile nenemvelo enobungane ukushayela ucwaningo kanye nemizamo yentuthuko yokwenza ngcono ukusebenza kanye nokuguquguquka kwezikhangiso ze-HPMC. Intuthuko yesikhathi esizayo ingagxila ekuthuthukiseni ukumelana kwamanzi, ukuqina okushisayo, nezindawo ezinamathela ezinamathela zokwakhiwa kwe-HPMC ngokusebenzisa izithasiselo zenoveli, izindlela zokuxhumanisa, nezindlela zokucubungula.
Ukuthuthukiswa kwezindlela ezisuselwa ku-bio kanye ne-bioderbradable ezinye izindlela zokwenziwa ze-polymers kulindeleke ukuthi zandise ubukhulu bezicelo ze-HPMC ezimbonini ezahlukahlukene. Ukusebenzisana phakathi kwe-Academia, imboni, kanye nezinhlaka zezinhlangano zikahulumeni kubalulekile ukuthuthukisa ubuchwepheshe bokunamathela kwe-HPMC kanye nokubhekana nezinselelo ezivelayo njengokusebenzisa kabusha kanye nokuphathwa kwemfucuza.
Ama-adhesives we-Hydroxypropyll Methylcellulose (HPMC) ahlinzeka ngezisombululo ezizinzile neziguquguqukayo zezicelo ezahlukahlukene zokubopha, ezivela ephepheni nasekupakisheni ekwakheni nasezindwangu. Ukuqonda ukwakheka nezakhiwo ze-HPMC kubalulekile ekubambeni kokunamathela ngokusebenza kahle kanye nokuhambisana kwezemvelo. Ngokucwaninga okuqhubekayo kanye nokwenziwa okusha, izinamathiseli ze-HPMC zizodlala indima ebalulekile ekuhlangabezaneni nezidingo eziguqukayo zemboni yanamuhla ngenkathi zinciphisa umthelela wezemvelo.
Isikhathi sePosi: Feb-18-2025