HydroxyPropyl methylcellose (HPMC) ndeye multifaunical compound zvakanyanya kushandiswa mumasango akasiyana-siyana nekuda kwemakemikari akasiyana emakemikari uye zvivakwa.
1. Chemical composition:
a. Cellulose backbone:
HPMC is cellulose inobviswa, zvinoreva kuti inobva kune cellulose, iyo yepamoyo polysaccharide inowanikwa mumasango masero emadziro. Cellulose Inemari yekudzokorora zvikamu zve β-D-Glucose yakabatanidzwa ne β (1 → 4) Glycosic Zvisungo.
b. Kutsiva:
MuHPMC, iyo hydroxyl (-OOH) moion yemhereme cellucose backbone inopedzwa ne methyl uye hydroxyprupropyl mapoka. Uku kutsiva kunoitika kuburikidza nekuita kwekuchinja. Dare rekutsiva Iyo DS yeMethyl uye hydroxypruspropyl mapoka akasiyana, ayo anokanganisa mashandiro eHPMC.
2. Synthesis:
a. Etera:
HPMC iri yakanyorwa kuburikidza nekutsva kwekuita cellulose nePropylone oxide uye methyl chloride. The process involves reacting cellulose with propylene oxide to introduce hydroxypropyl groups and then with methyl chloride to introduce methyl groups.
b. Degree reKudzora Kudzora:
Iyo DS yeHPMC inogona kudzorwa nekugadzirisa maitiro ekuita senge tembiricha, kuita nguva, uye kusagadzikana.
3. Performance:
a. Solubility:
HPMC inonyungudika mumvura uye imwe organic sols, senge methanol uye ethanol. Nekudaro, iyo solubility yayo inoderera nekuwedzera mamelelar uremu uye degree rekutsiva.
b. Film Ford:
HPMC inoumba inojekesa, inochinjika firimu kana ikanyungudika mumvura. Iyi mafirimu ane yakanaka michina simba uye zvipingamupinyi zvivakwa.
C. Viscossity:
HPMC Solutions inoratidzira pseudoplastic maitiro, zvichireva kuti viscoity yavo inoderera nekuwedzera shear rate. Iyo viscosity yeHPMC mhinduro dzinoenderana nezvinhu zvakadai sekusanzwisisika, zvinyoro-nyoro, uye degree rekutsiva.
d. Kuchengeta mvura:
Imwe yeiyo yakakosha midziyo yeHPMC ndeyekugona kuita kuti ive yemvura. Ichi chivakwa chakanyanya kutsoropodzwa mumashandisirwo akasiyana-siyana sezvinhu zvekuvaka, uko HpMC inoshandiswa seyekuita sedhiraini uye yemvura-yekuchengetedza mumiririri.
e. Adhishing:
HPMC inowanzoshandiswa seinonamatira mumasango akasiyana siyana nekuda kwekugona kwayo kuumba zvisungo zvakasimba kune dzakasiyana substrates.
4. Chikumbiro:
a. Indasitiri yeMishonga:
Mune mishonga yemishonga, HPMC inoshandiswa sebhuma, yefirimu yekubatanidza mumiririri, yakadzorwa kuburitswa mumiriri, uye viscosity modifier mune piritsi mafomu.
b. Indasitiri yekuvaka:
HPMC inowedzerwa kune coment-based-burns motars, gypsum-based plasters uye tile ainetso kuti uvandudze kugona, kudzokorora kwemvura uye kudedera.
C. Chikafu Indasitiri:
Muindasitiri yekudya, HPMC inoshandiswa seanoshandiswa sedhickener, stabilizer uye emulsifier mune zvigadzirwa senge sosi, zvipfeko uye ice cream.
d. Zvigadzirwa zvega zvega:
HPMC inoshandiswa seyakakwenenzverwa, emulsifier uye firimu-inogadzira mumiririri mune zvigadzirwa zvega zvega senge shampoos, lotions nemakirimu.
e. Pendi uye majasi:
Mukupenda uye kuhukura, HPMC inoshandiswa kuvandudza kupararira kwehunyanzvi, kudzora kwe viscosity uye kuchengetwa kwemvura.
Hydroxypropylmethylcellose (HPMC) inzvimbo yakati wandei ine huwandu hwakawanda hwekushandisa maindasitiri akasiyana siyana. Yayo yakasarudzika kemikari yemakemikari, synthesis uye zvivakwa zvinoita kuti ive yakakosha mune mishonga, zvekuvaka, chikafu, zvigadzirwa zvekutarisira uye pendi / majasi. Kunzwisisa zvivakwa zveHPMC kunobvumira kushandiswa kwakarongeka muminda yakasiyana, zvinobatsira kushandiswa kwayo kwakapararira uye kukosha kwayo muzviitiko zvazvino kugadzira.
Kutumira Nguva: Kukadzi-22-2024