HydroxyPropyl methylcellose (HPMC) iri polymer yakawedzera kushandiswa zvakanyanya mumushonga, chikafu, chokuvaka, zino uye mamwe madunhu uye mamwe minda. Iyo ine yakanakisa mvura salubility, collodal zvivakwa uye kugadzikana, saka ine zvakakosha mashandiro mumaindasitiri akasiyana siyana. Kuitira kuti uve nechokwadi chekuti kunaka kwayo uye kuchena, kuzivikanwa kwakakodzera kunokosha. Izvi zvinotevera ndezvimwe nyore nzira dzekuzivikanwa dze hydroxyprusyl methylcellose (HPMC), kufukidza zvikamu zvakadai sekutaridzika, solubild, infrared spectrum uye makemikari maitiro.
1. Kutaridzika kwekutarisa
HPMC inowanzo kuve yakachena kune-chena poda kana granuly fuma, inonhuhwirira uye isina kunaka. Nekutarisa kutaridzika kwayo, iwe unogona kutanga watonga kana iri hpmc. Chero shanduko yemavara kana kuti kuvapo kwekusvibiswa kunogona kuratidza kuti muenzaniso hauna kuchena kana kusvibiswa.
2. Solubility Kuzivikanwa
HPMC ine yakanaka solubility, kunyanya mumvura. Isa chidiki chidiki chemuenzaniso mumvura uye unomutsa zvinyoro nyoro. Kana inogona kunyungudika nekukurumidza uye gadzira yunifomu mhinduro yekodhi, zvinoreva kuti sampuli ndeye hydroxypruppropyl methylese. Kumhanya kwekunyungudika uye visikopa yemhinduro inogona kuve yakanangana neyemukuru weHPMC uye zvirimo zvehydroxyprosl uye methyl makemikari emakemikari.
Panguva imwecheteyo, iyo solubility yeHPMC mune organic sols inogona zvakare kushandiswa seyakazivikanwa chiyero. HPMC inonyungudika mune yakawanda organic solvent (secetone, ethanol, nezvimwewo), asi kusakwana mune mafuta emari. Hunhu uhwu hunogona kusimbiswa nekuyedza iyo solubility mune yakakodzera sol sol.
3. Infrared spectroscopy (IR) kuzivikanwa
Infrared spectroscopy (IR) chishandiso chakaringana chinogona kubatsira kusimbisa iyo molecular chimiro cheHPMC. Chimiro chikuru cheHPMC ndechekubatanidzwa kwemapoka akadai se methyl (-ch3) uye hydroxyprupyl (-ch2ch (oh) ch3). Kuvapo kwemapoka aya kunogona kusimbiswa neyekunyudza mapessi eiyo ir spectrum.
Hunhu hwekutora kwemapepa eHPMC's Ir spectrum inosanganisira:
2920 CM-1 (CH Inotambanudza Vibration)
1450 CM-1 (CH KUKUNDA VIBRATI)
1100-1200 CM-1 (Coc Kutambanudza Vibration)
3400 CM-1 (oh inotambanudza vibration, iyo peak kukosha inogona kuchinja nekuda kwekuvapo kwemvura)
Nekufananidza iyo IR spectrum yeTandard HPMC sampuli, inogona kufananidzwa nehuwandu hwenguva isingazivikanwe kuti isimbise kuzivikanwa kwemuenzaniso.
4. Chemical Reaction Kuzivikanwa
HPMC, seEther Compound, ine zvimwe zvemakemikari maitiro uye inogona kuzivikanwa neinotevera makemikari akareruka emakemikari maitiro.
(1) maitiro ari pasi pemamiriro ezvinhu emicic:
Nyungudusa hushoma hweHPMC mumvura, wedzera Dilute Hydrochloric acid, uye kupisa. Kana iyo collidal chinhu ichionekwa mumhinduro, zvinoreva kuti ine hpmc. Kuita uku kunogona kuzivikanwa nekugadzikana kwehydroxpropropyl uye methyl mapoka pasi pemamiriro epidic.
. Izvo hazvisi nyore kunyungudika pasi peAlkaline mamiriro (senge sodium hydroxide solution), iyo ine hukama nehydrophilicity uye hydrogel zvivakwa. Kana mhinduro yacho iri turbid kana yakarongedzerwa, zvinoreva kuti HPMC iripo.
5 Kazhinji, HPMC ichaumba chinhu cholodal nechimwe chete viscosity mushure mekunyungudika mumvura, uye visikoka inowedzera nekuwedzera kwehuremu hwayo.
Kuti uregere kuyera visikoka, iyo fluidity yekugadzirisa HPMC inogona kuyerwa nekushandisa totcometer kana girazi tube parcometer. Sekureva kwemanyorwe uremu hweHPMC uye kusunganidzwa kwemhinduro, iyo viscosity yayo inogona kufungidzirwa. Kana iyo viscosity yemuenzaniso yakadzikira zvakanyanya pane iyo yeiyo HPMC Solution Solution, inogona kuratidza kuti zvarinwiwa hazvina kuchena kana kurema kwemanyorerwo kwakaderera.
6. Inorongedza Point / Decomposition Point test hpmc, seyakanyanya molecular uremu, kazhinji haina poindi yakajeka yekunyungudika, asi inoratidza kupfava kana kuora panguva yekupisa. HpMC kana ichitsveneswa, shanduko dzayo dzekupisa dzinogona kucherechedzwa. Kazhinji, HPMC ichatanga kuora pa 180-200 ℃, kusunungura zvimwe zvinhu zvisina kujairika (senge mvura uye organic sol sol. Shanduko muDocomposition Point inogona kuenderera mberi nekusimbisa kana iyo sampu yakachena HPMC.
7. Solubility uye pamusoro petsvina nzira
Mhinduro yacho yakaumbwa mushure meHPMC kupera kweHPMC kazhinji ine yakadzika nzvimbo yekunetseka. Iko kushushikana kwepasi kweiyo HPMC mhinduro kunogona kuyerwa uchishandisa nzvimbo yemukati yeTensiometer kana yekudonha nzira. Kana ikatora nzvimbo yekumusoro yeiyo standard solution, zvinoreva kuti sampuli ndeye HPMC.
Izvo zviri pamusoro zvinosuma nzira dzinoverengeka dzakajairika uye dzakareruka dzekuzivisa hydroxypropropyl methylcellose (HPMC). Idzi nzira dzinozivisa HPMC kubva kuWlledzwa makona akadai sekutaridzika, solubiled spectrum, yekunyungudika, iyo yekunyungudika yemuenzaniso inogona kunyatso simbiswa, kupa vimbiso yekunyorera kwayo maindasitiri akasiyana.
Kutumira Nguva: Kukadzi-19-2025