HydroxyPropyyl methylcellulose (HPMC)

HydroxyPropyyl methylcellulose (HPMC)

HydroxyPropyyl methylcellose (HPMC), tseem hu ua Hypromellose, yog ib qho polymer ntau yam muab tau los ntawm cellulose. Nws yog dav siv nyob rau hauv ntau yam kev lag luam rau nws cov khoom ntiag tug, suav nrog kev siv tshuaj, kev tsim kho, khoom noj, tshuaj pleev ib ce, thiab kev saib xyuas tus kheej. Hauv cov phau ntawv qhia thoob plaws, peb yuav tshawb txog cov qauv tshuaj, cov khoom, tsim kev tsim khoom, kev siv hpmc hauv kev nthuav dav.

1. Taw qhia HPMC:

HydroxyPropyyl methylulose (HPMC) yog cov tsis-ionic cellulose ether tau los ntawm cov xov tooj ntawm ntuj los ntawm kev hloov kho cov tshuaj lom neeg. Nws yog synthesized los ntawm kev kho cellulose nrog cov tshuaj pleev cov epylene oxide thiab methyl cermoride los qhia hydroxypropyl thiab methyl pawg mus rau lub cellulose cellebone. Lub txiaj ntsig polymer kev nthuav qhia ntau yam ntawm cov khoom uas ua rau nws muaj txiaj ntsig zoo hauv ntau qhov kev siv.

2. Tshuaj Ntsuam Xyuas thiab Khoom:

HPMC yog tus qauv tshuaj, uas muaj ntawm cellulose cellon nrog hydroxypropyl thiab methyl chaw txuas nrog cov pab pawg hydroxyl. Cov degree ntawm kev hloov pauv (DS) ntawm cov pab pawg methyl tuaj yeem sib txawv, ua rau muaj kev sib txawv xws li solubility, solubility, thiab kev coj tus cwj pwm, thiab gelation gelation.

Cov khoom ntawm HPMC yog pawg xws li molecular hnyav, degree hloov chaw, thiab hydroxyprropyl / methyl piv. Feem ntau, HPMC cov khoom pov thawj cov khoom tseem ceeb hauv qab no:

  • Dej-Solubility
  • Zaj duab xis-tsim muaj peev xwm
  • Thickening thiab gelling cov khoom
  • Nto Ua Si
  • Kev ruaj khov tshaj li ntau
  • Sib xyaw nrog lwm cov ntaub ntawv

3. Kev tsim qauv:

Zus Tau Ntau Lawm HPMC cuam tshuam ntau kauj ruam, suav nrog:

  1. Kev npaj ntawm cellulose: cov cellulose ntuj, ib txwm muaj los ntawm ntoo pulp lossis paj rwb, yog ntxuav kom huv thiab kho kom zoo kom tshem tawm impurities thiab tsau.
  2. ETherification tiv thaiv: cellulose raug kho nrog cov tshuaj pleev antylene oxide thiab methyl catalids los qhia hydroxypropyl thiab methyl pawg mus rau lub cellulose.
  3. Neutralization thiab ntxuav: cov khoom lag luam uas tau cuam tshuam kom tshem tawm cov alkali thiab tom qab ntawd ntxuav kom tshem tawm cov khoom lag luam thiab impurities.
  4. Kom qhuav thiab sib tsoo: lub huv HPMC yog qhuav thiab hauv av rau hauv cov hmoov zoo haum rau ntau yam kev siv.

4. Cov qhab nia thiab cov lus qhia tshwj xeeb:

HPMC muaj nyob rau hauv ntau ntawm cov qib thiab specifications kom tau raws li cov cai tshwj xeeb ntawm kev lag luam sib txawv thiab kev siv. Cov no suav nrog kev hloov pauv hauv viscosity, loj me, qib degree hloov chaw, thiab gelation kub. Cov qib kawm ntawm HPMC muaj xws li:

  • Cov Qauv Viscosity (piv txwv li, 4000 CPS, 6000 CPS)
  • Cov viscosity siab (piv txwv li, 15000 CPS, 20000 CPS)
  • Tsawg viscosity qib (piv txwv li, 1000 CPS, 2000 CPS)
  • Cov qib tshwj xeeb tshwj xeeb rau cov ntawv thov tshwj xeeb (piv txwv li, kev tso tawm kev tso tawm, tswj tau)

5. Kev thov ntawm HPMC:

HPMC pom ntau yam siv hauv ntau qhov kev lag luam vim nws cov khoom muaj ntau yam thiab sib xyaw nrog cov khoom sib txawv. Qee cov ntawv thov tseem ceeb ntawm HPMC suav nrog:

a. Kws Kev Lag Luam:

  • Ntsiav tshuaj thiab tshuaj ntsiav tshuaj pleev xim
  • Kev Tso Tawm Tso Tawm
  • Binders thiab tua hluav taws xob hauv ntsiav tshuaj
  • Cov kev daws teeb meem ophthalmic thiab kev ncua
  • Txuj Ci Zoo Tshaj Tawm xws li cream thiab ointments

b. Kev Lag Luam Kev Tsim Kho Kev Tsim Kho:

  • Cov khoom siv xis mas thiab gypsum raws (piv txwv li, mortars, plasters)
  • Cov nplaum nplaum thiab grouts
  • Rwb thaiv tsev sab nrauv thiab cov tshuab sau tiav (EIFS)
  • Kev Ntsuas Tus Kheej
  • Cov xim pleev xim rau cov xim dej thiab txheej

c. Kev Lag Luam Khoom Noj:

  • Thickening thiab ruaj khov tus neeg sawv cev hauv cov khoom noj khoom haus
  • Emulsifier thiab cov neeg sawv cev raug rho tawm hauv cov kua thiab hnav khaub ncaws
  • Kev Noj Qab Haus Faib Khoom Noj
  • Gluten-Dawb Baking thiab concstectionery

d. Saib xyuas tus kheej thiab tshuaj pleev ib ce:

  • Thickener thiab ncua cov neeg sawv cev hauv lotions thiab cream
  • Binder thiab zaj duab xis-yav dhau los hauv cov khoom tu plaub hau
  • Kev Tso Tawm Hauv Skincare Txoj Yeeb
  • Qhov muag poob thiab hu rau Lens daws teeb meem

6. Cov txiaj ntsig ntawm kev siv HPMC:

Kev siv HPMC muaj ntau cov txiaj ntsig thoob plaws kev lag luam sib txawv:

  • Txhim kho cov khoom lag luam thiab qhov zoo
  • Txhim kho cov qauv tsim yooj yim thiab kev ruaj khov
  • Kev ncua txee ntev thiab txo cov khoom lwj
  • Txhim kho cov txheej txheem ua tau zoo thiab raug nqi-ua hauj lwm zoo
  • Ua raws li cov cai tswj kev cai thiab cov qauv kev nyab xeeb
  • Ib puag ncig phooj ywg thiab biocompible

7. Yav dhau los kuj thiab Outlook:

Qhov kev thov rau HPMC yuav tsum txuas ntxiv loj hlob, uas tau tsav los ntawm cov yam ntxwv zoo li kev txhim kho hauv nroog, thiab cov khoom lag luam saib xyuas tus kheej. Kev tshawb fawb txuas ntxiv thiab kev tsim kho ntawm kev ua kom tau txais HPMC tsim kho, nthuav nws cov ntawv thov, thiab txhim kho cov txheej txheem tsim kom tau raws li cov kev xav tau kev lag luam tawm.

8. Xaus:

HydroxyPropyyl methylcellulose (HPMC) yog cov polymer ntau yam nrog cov kev siv ntau thoob thoob plaws ntau yam kev lag luam. Nws cov khoom tshwj xeeb, xws li cov dej solubility, ua yeeb yaj kiab ua yeeb yam, ua kom muaj txiaj ntsig zoo, kev kho kom zoo, thiab kev saib xyuas tus kheej, thiab tshuaj pleev ib ce, thiab tshuaj pleev ib ce, thiab tshuaj pleev ib ce, thiab tshuaj pleev ib ce, thiab tshuaj pleev ib ce, thiab tshuaj pleev ib ce, thiab tshuaj pleev ib ce, thiab tshuaj pleev ib ce. Raws li thev naus laus zis thiab kev lag luam xav tau kev hloov kho, HPMC yuav tsum ua kom muaj txoj haujlwm tseem ceeb hauv kev ua lub neej tom ntej ntawm ntau yam lag luam.

Lub Sijhawm Post: Feb-11-2024