Umehluko phakathi kwe-hydroxypropyllylylylm methylcellulose kanye hydroxyethyl cellulose

I-Hydroxypropyl methylcellulose (HPMC) na-I-Hydroxyyethyl cellulose (HEC) Zombili zomabili ama-cellulose derivatives, asetshenziswa kabanzi embonini, umuthi, izimonyo kanye nezinye izinkambu. Umehluko wabo omkhulu uboniswa esakhiweni samangqamuzana, izici ze-solubility, izinkambu zohlelo kanye nezinye izici.

1. Isakhiwo samangqamuzana

I-Hydroxypropyl methylcellulose (HPMC)

I-HPMC ingukutholwa kwamanzi okuvela ekwethulweni kwe-methyl (-ch3) ne-hydroxypropyls (-ch2chohchch3) amaqembu angena ecaleni lama-molecular. Ngokukhethekile, isakhiwo samangqamuzana se-HPMC siqukethe izinto ezimbili ezisebenzayo, i-methyl (-Och3) neHydroxyproppyl (-Och2ch (oh) CH3). Imvamisa, isilinganiso sesilinganiso se-methyl siphakeme, kanti i-hydroxypropyl ingathuthukisa ngempumelelo i-solubity ye-cellulose.

I-Hydroxyyethyl cellulose (HEC)

I-HEC iyinto etholwayo eyethulwa ukwethula amaqembu e-Ethyl (-ch2ch2oh) eCellulose Molecular Chain. Esakhiweni se-hydroxyethyl cellulose, amaqembu athile noma amaningi we-hydroxyl (-oh) we-cellulose athathelwa indawo ngamaqembu e-ethyl hydroxyl (-CH2CH2OH). Ngokungafani ne-HPMC, isakhiwo samangqamuzana se-HEC sine-hydroxyethyyl eyodwa kuphela futhi asinawo amaqembu we-methyl.

2. I-solubity yamanzi

Ngenxa yokungafani okuhlelekile, i-solubility yamanzi ye-HPMC ne-HEC yehlukile.

I-HPMC: I-HPMC ine-solubity enhle yamanzi, ikakhulukazi kumanani angathathi hlangothi noma amancanyana e-alkaline ph, ukulekelela kwawo kungcono kune-HEC. Ukwethulwa kwamaqembu we-methyl kanye ne-hydroxypropyl kuthuthukisa i-solubility yayo futhi kungakhulisa ukubonakala kwalo ngokuxhumana nama-molecule amanzi.

I-HEC: I-HEC ivame ukuncibilika emanzini, kepha i-solubility yayo impofu, ikakhulukazi emanzini abandayo, futhi imvamisa idinga ukuchithwa ngaphansi kwezimo zokushisa noma idinga ukugxila okuphezulu ukuze kufinyelelwe imiphumela efanayo yokubona. I-solubility yayo ihlobene nokwehlukahluka kwesakhiwo se-cellulose kanye ne-hydrophicility yeqembu le-hydroxyethyl.

3. I-Viscosity kanye Nezakhiwo Ze-Rheological

I-HPMC: Ngenxa yokuba khona kwamaqembu amabili ahlukene we-hydrophilic (i-hpylypropyl) kuma-molecule alo, i-HPMC inezakhiwo ezinhle zokulungiswa kwamanzi emanzini futhi isetshenziswa kabanzi ekunamathisweni ezinamanzi futhi isetshenziswa, amalungiselelo amakhambi kanye nezinye izinkambu. Ngokugxila okuhlukile, i-HPMC inganikeza ukulungiswa kusuka ekuboniseni okuphansi kokubonakala okuphezulu, futhi i-viscosity izwela kakhulu izinguquko ze-PH.

I-HEC: I-viscosity ye-HEC ingashintshwa futhi ngokushintsha okuhlushwa, kepha uhla lokulungiswa kwalo luncane kunalokho kwe-HPMC. I-HEC isetshenziswa ikakhulukazi ezimweni lapho kudingeka khona ukubonwa okuphansi kokuphakathi kokuphansi, ikakhulukazi ekwakheni, imikhiqizo yokunakekelwa komuntu siqu. Izakhiwo ze-Hhec zika-HEC zizinzile, ikakhulukazi ezindaweni ezine-acidic noma ezingathathi hlangothi, i-hec inganikeza ukubonakala okuzinzile.

4. Izinkambu zohlelo lokusebenza

I-Hydroxypropyl methylcellulose (HPMC)

Imboni yezokwakha: I-HPMC isetshenziswa kakhulu ku-cunmer ngodaka nasezinkotsheni embonini yezokwakha ukuze ithuthukise i-fluidity, ukusebenza kanye nokuvimbela imifantu.

Imboni yezemithi: Njengomenzeli wokulawulwa kwezidakamizwa, i-HPMC isetshenziswa kabanzi embonini yezemithi. Akunakusetshenziswa kuphela njenge-ejenti eyakha amaphilisi kanye nama-caplule, kepha futhi njengokunamathela ukusiza ukukhishwa kwezidakamizwa ngokulinganayo.

Imboni yokudla: I-HPMC ivame ukusetshenziswa ekucutshungweni kokudla njenge-stabilizer, i-mkhulu noma i-emulsifier ukwenza ngcono ukuthungwa nokunambitheka kokudla.

Imboni yezimonyo: Njengomkhulu, i-HPMC isetshenziswa kabanzi kwimikhiqizo efana nokhilimu, ama-shampoos, kanye nezimo zokukhulisa i-viscosity nokuqina kwemikhiqizo.

I-Hydroxyyethyl cellulose (HEC)

Imboni Yokwakha: I-HEC ivame ukusetshenziswa ku-CEENT, Gypsum, kanye nama-tile anamathela ukuze athuthukise uketshezi kanye nesikhathi sokugcina umkhiqizo.

Ama-Cleaners: I-HEC ivame ukusetshenziswa kubahlanzayo zasendlini, okokuhlanza izingubo neminye imikhiqizo ukwandisa i-viscosity yomkhiqizo futhi uthuthukise umphumela wokuhlanza.

Imboni yezimonyo: I-HEC isetshenziswa kabanzi kwimikhiqizo yokunakekelwa kwesikhumba, ama-gels okugeza, ama-shampoos, njll. Njengomenzeli omkhulu kanye nokuqina ukuze athuthukise ukuthungwa nokuqina komkhiqizo.

Ukukhishwa kwamafutha: I-HEC nayo ingasetshenziswa kwinqubo yokukhishwa kwamafutha njengoketshezi olususelwa ekuvuthweni olususelwa emanzini ukusiza ukukhulisa i-viscosity futhi uthuthukise umphumela wokumba.

5. Ukuqina kwe-PH

I-HPMC: I-HPMC izwela kakhulu izinguquko ze-PH. Ngaphansi kwezimo ze-acidic, i-solubity ye-HPMC iyancipha, okungathinta ukusebenza kwayo. Ngakho-ke, imvamisa isetshenziswa ngokungathathi hlangothi imvelo kancane ye-alkaline.

I-HEC: I-HEC ihlala zizinzile ngaphezu kobubanzi be-PH. Inokuvumelana okuqinile kwezindawo ezi-acidic ne-alkaline, ngakho-ke kuvame ukusetshenziselwa ukwakheka okudinga ukuqina okuqinile.

I-HPMCna-I-HECYehluka ngesakhiwo samangqamuzana, e-solubility, ukusebenza kokulungiswa kwe-viscosity, kanye nezindawo zohlelo lokusebenza. I-HPMC ine-solubility yamanzi enhle nokusebenza kokulungiswa kwe-viscosity, futhi ilungele izinhlelo zokusebenza ezidinga ukubonwa okuphezulu noma ukusebenza okuqondile okulawulwa okulawulwayo; Ngenkathi i-HEC inokuqina okuhle kwe-PH kanye nezinhlobonhlobo zezicelo, futhi ilungele izikhathi ezidinga ukubonakala okuphakathi nokuphansi kanye nokuvumelana okuqinile kwezemvelo. Kuzinhlelo zokusebenza zangempela, ukukhethwa kwalo manto okudingeka kuhlolwe ngokuya ngezidingo ezithile.