Uyini umehluko phakathi kwe-HPMC ne-MHHEC?

I-Hydroxypropyll methylcellulose (HPMC) ne-methyl hydroxyethyls celtulose (Mhec) zombili izipho ze-cellulose, ezisetshenziswayo ezimbonini ezahlukahlukene ezinjengezokwakha, ezemithi, ukudla, ukudla nezimonyo. Ngaphandle kokuhlanganyela izibalo ezakhiweni zazo zamakhemikhali kanye nezicelo zabo, kunomehluko ohlukile phakathi kwalokhu okubili.

1. Ukwakheka kwamakhemikhali:

I-HPMC (HYDROXYPROPYL Methylcellulose): I-HPMC iyi-polymer ye-semi-zokwenziwa ethathwe ku-cellulose. Kukhiqizwa ngokuguqulwa kwamakhemikhali kwe-cellulose, kukhishwe ngokuyinhloko kusuka ku-Wood Pulp noma amabutho ekotoni. Ukuguqulwa kuhlanganisa ukwelapha i-cellulose nge-alkali, kulandelwe ukusheshisa nge-propelene oxide kanye ne-methyl chloride ukwethula i-hydroxypropyll kanye ne-methyls namaqembu we-methyl ku-cellulose backbone.

UMhec (Methyl hydroxyyethyl celtuleose): I-MHEC nayo ingu-cellulose ether etholakala ngokuguqulwa kwamakhemikhali we-cellulose. Ifana ne-HPMC, ithola ukusabela kokuthembela ukwethula amaqembu we-methylyethyy e-cellulose backbone. I-MHEC ihlelwe ngokwelapha i-celsulose nge-alkali, elandelwa ukuhanjiswa nge-methyl chloride ne-ethylene oxide.

2. Isakhiwo samakhemikhali:

Ngenkathi yomibili i-HPMC ne-MHEC yabelana nge-cellulose backbone, ziyehluka ngohlobo kanye nohlelo lwamaqembu angenalutho anamathiselwe kule-backbone.

Ukwakhiwa kwe-HPMC:
Amaqembu e-Hydroxypropyl (-ch2chohchch3) namaqembu we-methyl (-ch3) asatshalaliswa ngokungahleliwe ecaleni le-cellulose.
Isilinganiso se-Hydroxypropyl kumaqembu we-methyl siyahlukahluka ngokuya ngenqubo yokukhiqiza kanye nezindawo ezifiselekayo.

Isakhiwo se-MHEC:
Amaqembu we-methyl kanye ne-hydroxyethyl (-ch2chohch3) anamathele emuva kwi-cellulose backbone.
Isilinganiso se-methyl amaqembu ama-hydroxyethyl singashintshwa ngesikhathi sokuhlanganiswa ukuze kufinyelelwe izakhiwo ezithile.

3. Izakhiwo:

Izakhiwo ze-HPMC:
I-HPMC ikhombisa i-solubity yamanzi ephezulu, yakha izixazululo ezisobala nezibonakalayo.
Inezakhiwo ezinhle kakhulu zefilimu, okwenza zilungele izinhlelo zokusebenza ezidinga ukuhlanganiswa kwefilimu.
I-HPMC inikeza ukunamathela okuhle nezindawo ezibophayo, ukuthuthukisa ubumbano ezinqumweni ezahlukahlukene.
I-viscosity yezixazululo ze-HPMC ingalinganiswa ngokulungisa izinga lokufakwa esikhundleni kanye nesisindo se-molecular.

Izakhiwo zeMhec:
I-MheC ibuye ikhombisa i-solubility yamanzi, kepha i-solubenity yayo ingahluka ngokuya ngezinga lokufakwa esikhundleni kanye nokushisa.
Yakha izixazululo ezicacile ngokuziphatha kwe-pseudoplastic, kukhombisa izakhiwo ezincipha ukuncipha.
I-MHEC ihlinzeka ngemiphumela emihle yokuqina kanye nokuzinza ezinhlelweni zamashele.
Njenge-HPMC, i-viscosity ye-MHEC Solutions ingalawulwa ngokushintsha izinga lokufakwa esikhundleni kanye nesisindo se-molecular.

4. Izicelo:

Izicelo ze-HPMC:
Imboni Yezokwakha: I-HPMC isetshenziswa kabanzi ku-masters esekwe kusawoti, ama-gypsum asuselwa ku-gyps, kanye nama-tile anamathela ukuze athuthukise ukusebenziseka, ukugcinwa kwamanzi, kanye nokunamathela.
I-Pharmaceuticals: I-HPMC isetshenziswa embonweni wethebhulethi, ukwakheka okulawulwa okulawulwayo, izixazululo ze-ophthalmic, kanye namalungiselelo aphezulu ngenxa yezakhiwo zayo ezakhiwe ngefilimu nezama-mucoadhesive.
Ukudla nezimonyo: I-HPMC isebenza njenge-ejenti yokuqina, i-Stabilizer, kanye ne-emulsifier emikhiqizweni yokudla, izinto zokunakekelwa komuntu, nezimonyo.

Izicelo ze-MheC:
Imboni Yezokwakha: I-MHEC ivame ukuqashwa ngezinto ezenzeka ngokonamba ezinjenge-tile adhesives, i-render kanye nama-grouts ukuthuthukisa ukugcinwa kwamanzi, ukusebenziseka kanye nokunamathela.
Amapende nezimbobo: I-MHEC isetshenziswa njengokushintsha kwe-Rheology kumapende asuselwa emanzini, ukumboza, kanye nama-inks ukulawula i-viscosity, ukuvikela ukugcwala, futhi kuthuthukiswe izakhiwo zohlelo lokusebenza.
Izakhi zemithi: I-Mhec ithola izinhlelo zokusebenza ekumisweni kwemithi, amalungiselelo we-ophthalmic, namafomu okulawulwa kokukhishwa komthamo njenge-ejenti yokuqina nokuzinza.

5. Izinzuzo:

Izinzuzo ze-HPMC:
I-HPMC inikeza izakhiwo ezenziwe ngefilimu eziphakeme, okwenza ilungele izimbotshana zethebhulethi kanye nokwakhiwa okulawulwa okulawulwayo.
Ibonisa ukunamathela okuhle nezimpawu ezibophayo, okwenza ngcono ukubumbana kwezindlela ezahlukahlukene.
I-HPMC ihlinzeka ngokuguquguquka ekushintsheni kokuqonda kanye nokushintsha izakhiwo zezixazululo.

Izinzuzo ze-MHEC:
UMhec ukhombisa ukuqina okukhethekile nokuqiniswa kwemiphumela ezinhlelweni zamashele, okwenza kulungele ukupenda, ukwakhiwa, kanye nokwakheka kwemithi.
Inikeza izakhiwo ezinhle zokugcina amanzi, ukwenza ngcono ukusebenziseka kanye nokunamathelisa emikhiqizweni esekwe kuthusi.
I-MHEC ihlinzeka ngokuziphatha kwe-pseudoplastic, okuvumela uhlelo lokusebenza olulula kanye nezimpawu zokugeleza ezithuthukisiwe ku-Coatings nopende.

Ngenkathi bobabili i-HPMC ne-MHEC zithwala izivumelwano ezifanayo nezinhlelo ezifanayo, zibonisa umehluko ezintweni zazo zamakhemikhali, izakhiwo, izakhiwo nezinzuzo. I-HPMC yaziwa ngempahla yayo enhle kakhulu yefilimu nenama-adhesion, kanti ama-MHEC ama-Excels ekukhuze, ekuqiniseni, nasemiphumeleni yokugcina amanzi. Ukuqonda lokhu kuhluka kubalulekile ekukhetheni i-ether efanele kakhulu yeselula ukuthola izinhlelo ezithile ezimbonini ezahlukahlukene.