Hydroxypropylmethylcellulose (HPMC) yog ntau yam thiab ntau yam polymer uas belongs rau tsev neeg cellulose ether.Nws yog synthesized los ntawm ib tug series ntawm cov tshuaj tiv thaiv los ntawm kev hloov tej yam ntuj tso cellulose, ib feem tseem ceeb ntawm cov nroj tsuag cell phab ntsa.Qhov tshwm sim HPMC muaj cov khoom tshwj xeeb uas ua rau nws muaj txiaj ntsig thoob plaws kev lag luam.
1. Cov qauv tshuaj thiab muaj pes tsawg leeg:
HPMC yog muab los ntawm cellulose, uas muaj cov piam thaj rov qab txuas los ntawm β-1,4-glycosidic bonds.Los ntawm kev hloov kho tshuaj, pawg hydroxypropyl thiab methoxy tau nkag mus rau hauv cov pob txha cellulose.Qib ntawm kev hloov pauv (DS) ntawm pawg hydroxypropyl thiab methoxy tuaj yeem sib txawv, ua rau cov qib sib txawv ntawm HPMC nrog cov khoom sib txawv.
Cov qauv tshuaj ntawm HPMC muab nws solubility thiab gel-forming peev xwm, ua rau nws pab tau nyob rau hauv ntau yam kev siv nyob rau hauv ntau yam kev lag luam.
2. Solubility thiab rheological zog:
Ib qho ntawm cov khoom tseem ceeb ntawm HPMC yog nws cov solubility hauv dej, ua rau nws cov dej-soluble polymer.HPMC tsim cov kua ntshiab thiab khov thaum yaj hauv dej, thiab nws cov khoom rheological tuaj yeem hloov kho los ntawm kev hloov qhov hnyav molecular thiab qib ntawm kev hloov pauv.Qhov no tunable solubility thiab rheology ua HPMC haum rau ntau yam kev siv.
3. Film-forming kev ua tau zoo:
HPMC muaj cov cuab yeej ua yeeb yaj kiab zoo heev thiab tuaj yeem tsim cov yeeb yaj kiab hloov tau thaum cov polymer yaj hauv dej.Cov cuab yeej no pom daim ntawv thov hauv kev lag luam tshuaj thiab zaub mov rau txheej ntsiav tshuaj, encapsulating flavour thiab muab cov khoom thaiv hauv cov yeeb yaj kiab noj tau.
4. Kev siv kho mob:
HPMC tau dav siv hauv kev lag luam kws tshuaj vim nws cov khoom siv ntau yam.Nws yog siv nyob rau hauv cov ntsiav tshuaj formulations raws li ib tug binder, disintegrant, film-forming tus neeg saib xyuas thiab sustained-tso tus neeg saib xyuas.Cov polymer muaj peev xwm tswj tau cov tshuaj tso tawm thiab txhim kho kev ruaj ntseg ntawm cov tshuaj formulations ua rau nws yog ib qho tseem ceeb muaj nyob rau hauv zus tau tej cov ntau yam ntawm qhov ncauj ntau npaum cov ntaub ntawv.
5. Kev tsim kho kev lag luam:
Hauv kev tsim kho kev lag luam, HPMC tau siv dav los ua tus neeg sawv cev thickening, dej tuav tus neeg saib xyuas thiab ua haujlwm tau zoo hauv cov khoom siv cement xws li mortars, grouts thiab plasters.Nws cov khoom rheological pab txhim kho kev ua haujlwm, sag tsis kam thiab adhesion, ua rau nws yog ib qho tseem ceeb ntxiv hauv cov khoom siv hauv tsev.
6. Khoom noj khoom haus thiab tshuaj pleev ib ce:
Hauv kev lag luam khoom noj khoom haus, HPMC yog siv los ua cov thickener, emulsifier, thiab stabilizer nyob rau hauv ntau yam khoom, nrog rau cov kua ntses, condiments, thiab cov khoom noj siv mis.Nws qhov xwm txheej tsis muaj tshuaj lom thiab muaj peev xwm tsim cov gels ntshiab ua rau nws tsim nyog rau kev siv zaub mov.
Ib yam li ntawd, hauv kev lag luam tshuaj pleev ib ce, HPMC yog siv rau hauv formulations xws li cream, lotions, thiab tshuaj zawv plaub hau vim nws thickening, stabilizing, thiab film-forming zog.Nws txhawb kev ntxhib los mos, viscosity thiab stability ntawm cov tshuaj pleev ib ce.
7. Xim thiab Txheej:
HPMC yog siv los ua cov thickener thiab rheology hloov kho hauv cov xim dej thiab cov txheej txheem.Nws txhim kho cov txheej txheem daim ntawv thov, xws li paintability thiab splash resistance, thaum tseem txhim kho tag nrho cov kev ua tau zoo ntawm txheej.
8. Adhesive:
Nyob rau hauv daim ntawv nplaum, HPMC ua raws li cov thickener thiab dej tuav tus neeg sawv cev.Nws lub peev xwm los tswj cov viscosity thiab txhim kho adhesion ua rau nws muaj txiaj ntsig zoo hauv kev tsim cov nplaum nplaum hauv ntau qhov kev lag luam, suav nrog kev ua haujlwm ntoo thiab ntawv sib txuas.
9. Tswj kev tso tawm qhov system:
Kev tswj kev tso tawm ntawm cov khoom xyaw nquag yog qhov tseem ceeb rau ntau qhov kev lag luam, suav nrog cov tshuaj thiab kev ua liaj ua teb.HPMC feem ntau yog siv los tsim cov txheej txheem tso tawm vim tias nws muaj peev xwm tsim cov matrix uas tswj cov kev tso tawm ntawm cov tshuaj encapsulated lub sijhawm.
10. Biomedical applications:
Hauv kev lag luam biomedicine thiab cov ntaub so ntswg engineering, HPMC tau tshawb nrhiav rau nws cov biocompatibility thiab muaj peev xwm tsim hydrogels.Cov hydrogels no tuaj yeem siv rau hauv kev xa tshuaj, kho qhov txhab, thiab daim ntaub ntawv rov tsim dua tshiab.
11. Cov yam ntxwv tiv thaiv ib puag ncig:
HPMC raug suav hais tias yog ib puag ncig tus phooj ywg vim nws tau muab los ntawm cov peev txheej txuas ntxiv mus thiab yog biodegradable.Nws siv nyob rau hauv ntau yam kev siv yog nyob rau hauv txoj kab nrog kev loj hlob ntawm kev thov rau cov khoom siv ruaj khov thiab zoo ib puag ncig.
12. Cov kev sib tw thiab kev txiav txim siab:
Txawm hais tias HPMC tau siv dav, ntau qhov kev sib tw muaj nyob, suav nrog nws qhov rhiab heev rau qhov kub thiab txias, uas cuam tshuam rau nws cov khoom gel.Tsis tas li ntawd, cov txheej txheem kev tsim khoom thiab kev hloov tshuaj lom neeg ntawm cellulose yuav tsum tau ua tib zoo xav los ntawm ib puag ncig thiab kev pom zoo.
13. Kev Ua Raws Cai:
Raws li nrog rau txhua yam khoom siv hauv tshuaj, khoom noj thiab lwm yam khoom siv, nws tseem ceeb heev uas cov qauv tsim los ntawm cov koom haum tswj hwm tau ua raws.HPMC feem ntau ua tau raws li cov kev cai, tab sis cov tuam txhab tsim khoom yuav tsum ua raws li cov lus qhia tshwj xeeb rau txhua daim ntawv thov.
nyob rau hauv xaus:
Hydroxypropylmethylcellulose (HPMC) yog ntau yam polymer nrog ntau yam kev siv thoob plaws ntau yam kev lag luam.Nws qhov tshwj xeeb ua ke ntawm solubility, zaj duab xis-tsim zog thiab rheology tswj ua rau nws indispensable nyob rau hauv pharmaceuticals, kev tsim kho, khoom noj khoom haus, tshuaj pleev ib ce, xim, adhesives thiab lwm yam.Raws li kev lag luam txuas ntxiv mus nrhiav cov kev daws teeb meem zoo thiab muaj txiaj ntsig, HPMC zoo li yuav nyob twj ywm tseem ceeb hauv kev tsim cov khoom sib txawv.Txawm hais tias muaj qee qhov kev sib tw, kev tshawb fawb tsis tu ncua thiab kev nce qib hauv cellulose chemistry tuaj yeem nthuav dav ntxiv rau cov ntawv thov thiab txhim kho kev ua haujlwm ntawm HPMC yav tom ntej.
Post lub sij hawm: Dec-28-2023