Hydroxypropyl methylcellulose (HPMC), sechinhu chinowanzo shandiswa mu cellulose, inoshandiswa zvakanyanya mukuvaka, mishonga, chikafu, makemikari ezuva nezuva nemamwe maindasitiri. Hunhu hweHPMC hunonyanya kutongwa kubva pazvinhu zvemuviri uye zvemakemikari, mashandiro ekushanda uye mhedzisiro yekushandiswa.
1. Chitarisiko neruvara
HPMC inowanzova upfu huchena kana husina kuchena. Kana paine shanduko huru yeruvara, senge yero, grey, nezvimwewo, zvinogona kureva kuti kuchena kwayo hakuna kukwira kana kuti yasvibiswa. Pamusoro pezvo, kufanana kwehukuru hwezvimedu kunoratidzawo mwero wekutonga kwemaitiro ekugadzira. Zvimedu zvakanaka zveHPMC zvinofanira kugoverwa zvakaenzana pasina kuungana kana tsvina zviri pachena.
2. Kuedzwa kwekunyungudika
HPMC ine mvura inonyungudika zvakanaka, inova chiratidzo chakakosha chekuongorora kunaka kwayo. Kuburikidza nebvunzo iri nyore yekunyungudika, kunyungudika kwayo uye kusimba kwayo zvinogona kuongororwa. Matanho acho ndeaya anotevera:
Tora hupfu hushoma hweHPMC, wohuisa zvishoma nezvishoma mumvura inotonhora kana mvura inodziya yemumba, wobva waona kunyungudika kwayo. HPMC yemhando yepamusoro inofanira kupararira zvakaenzana munguva pfupi pasina mvura inoyerera, uye pakupedzisira yogadzira mushonga wecolloidal wakajeka kana kuti une madhaka zvishoma.
Mwero wekunyungudika kweHPMC unoenderana nechimiro chayo chemamorekuru, mwero wekutsiva, uye kuchena kwemaitiro. HPMC isina kunaka inogona kunyungudika zvishoma nezvishoma uye nyore nyore kugadzira mavanga akaoma kuora.
3. Kuyera kusimba kwemuviri
Kusviba ndeimwe yenzira dzakakosha dzemhando yeHPMC. Kusviba kwayo mumvura kunokanganiswa nehuremu hwemamorekuru uye mwero wekutsiva, uye inowanzo kuyerwa ne rotational viscometer kana capillary viscometer. Nzira chaiyo ndeyekunyungudutsa huwandu hwakati hweHPMC mumvura, kugadzirira mhinduro yehuwandu hwakati, uye wozoyera kusviba kwemhinduro. Zvichienderana nedata rekusviba, zvinogona kutongwa kuti:
Kana kukosha kwe viscosity kwakaderera zvakanyanya, zvinogona kureva kuti huremu hwemamorekuru hudiki kana kuti hwakaderera panguva yekugadzira;
Kana viscosity yakakwira zvakanyanya, zvinogona kureva kuti huremu hwemamorekuru hwakanyanya kukura kana kuti chinotsiva hachina kuenzana.
4. Kuonekwa kwekuchena
Kuchena kweHPMC kuchakanganisa mashandiro ayo zvakananga. Zvigadzirwa zvisina kuchena zvakanyanya zvinowanzova nemarara akawanda kana tsvina. Kutonga kwekutanga kunogona kuitwa nenzira dzinotevera dziri nyore:
Kuedza kutsva kwezvinosara: Isa sampuli diki yeHPMC muchoto chinopisa zvakanyanya woipisa. Huwandu hwezvinosara hunogona kuratidza huwandu hwemunyu usingashandiswe uye maion esimbi. Zvinosara zveHPMC zvemhando yepamusoro zvinofanira kunge zviri zvishoma.
Kuyedzwa kwe pH: Tora huwandu hwakakodzera hwe HPMC woinyungudutsa mumvura, uye shandisa bepa re test pH kana pH meter kuyera pH ye solution. Mumamiriro ezvinhu akajairwa, HPMC aqueous solution inofanira kunge iri pedyo ne neutral. Kana iri acidic kana alkaline, tsvina kana zvimwe zvinhu zvinogona kunge zviripo.
5. Hunhu hwekupisa uye kugadzikana kwekupisa
Nekudziisa sampuli yeHPMC, kugadzikana kwayo pakupisa kunogona kuonekwa. HPMC yepamusoro-soro inofanira kunge yakagadzikana pakupisa zvakanyanya panguva yekudziyisa uye haifanirwe kuora kana kukurumidza kupera simba. Matanho ari nyore ekuyedza kushanda kwekupisa anosanganisira:
Pisai chidimbu chidiki chemuenzaniso padhishi rinopisa moona kuti rinonyunguduka uye kuti rinoora sei.
Kana sampuro ikatanga kuora kana kuchinja ruvara patembiricha yakaderera, zvinoreva kuti kugadzikana kwayo pakupisa kwakashata.
6. Kuona hunyoro
Kuwanda kwemvura muHPMC kunokanganisa kugadzikana kwayo uye mashandiro ayo. Hunyoro hwayo hunogona kutsanangurwa nenzira yehuremu:
Isa sampuli yeHPMC muovheni woiomesa pa105℃ kusvika pahuremu hwakaenzana, wobva waverenga mutsauko wehuremu usati waoma uye mushure mekuomesa kuti uwane hunyoro. HPMC yemhando yepamusoro inofanira kunge ine hunyoro hushoma, kazhinji inodzorwa pasi pe5%.
7. Dhigirii rekuona nzvimbo yekutsiva
Kuwanda kwekutsiva methoxy ne hydroxypropoxy groups dzeHPMC kunokanganisa zvakananga mashandiro ayo, zvakaita sekunyungudika, tembiricha yegel, viscosity, nezvimwewo. Kuwanda kwekutsiva kunogona kutsanangurwa ne chemical titration kana infrared spectroscopy, asi nzira idzi dzakaoma uye dzinofanira kuitwa munzvimbo yerabhoritari. Muchidimbu, HPMC ine substitution yakaderera haina kunyungudika kwakasimba uye inogona kugadzira magel asina kufanana mumvura.
8. Kuedza tembiricha yejel
Tembiricha yegel yeHPMC ndiyo tembiricha yainoumba gel panguva yekupisa. HPMC yemhando yepamusoro ine tembiricha yakatarwa yegel, inowanzo kuve pakati pe60°C ne90°C. Nzira yekuyedza tembiricha yegel ndeiyi:
Nyungudutsa HPMC mumvura, wedzera tembiricha zvishoma nezvishoma, uye tarisa tembiricha inochinja mhinduro kubva pakupenya kuenda pakusviba, inova tembiricha yegel. Kana tembiricha yegel ikasiyana neyakajairika, zvinogona kureva kuti chimiro chayo chemamorekuru kana mwero wekutsiva hausviki pachiyero chakajairwa.
9. Kuongorora mashandiro
Mashandiro eHPMC pazvinangwa zvakasiyana anogona kusiyana. Semuenzaniso, muindasitiri yekuvaka, HPMC inowanzoshandiswa semushonga wekuchengetedza mvura uye muchina wekuomesa. Mashandiro ayo ekuchengetedza mvura uye muchina wekuomesa anogona kuyedzwa kuburikidza nekuyedza kwemortar kana putty. Muindasitiri yemishonga neyekudya, HPMC inoshandiswa semuchina wekugadzira firimu kana kapisi, uye muchina wayo wekugadzira firimu uye hunhu hwayo hwecolloidal zvinogona kuyedzwa kuburikidza nekuyedza.
10. Kunhuhwirira uye Zvinhu Zvinochinja-chinja
HPMC yemhando yepamusoro haifanirwe kunge iine hwema hunoonekwa. Kana sampuro yacho iine hwema hunonhuhwirira kana kuti kuravira kwayo, zvinogona kureva kuti makemikari asina kunaka akaiswa panguva yekugadzira kwayo kana kuti ine zvinhu zvinoputika zvakanyanya. Pamusoro pezvo, HPMC yemhando yepamusoro haifanirwe kugadzira magasi anogumbura pakupisa kwakanyanya.
Hunhu hweHPMC hunogona kutongwa nemiedzo iri nyore yakaita sekuonekwa, kunyungudika uye kuyerwa kwe viscosity, kana nenzira dzemakemikari dzakadai sekuyera kuchena uye kuyedzwa kwekushanda kwekupisa. Kuburikidza nenzira idzi, kutongwa kwekutanga kunogona kuitwa pamusoro pehunhu hweHPMC, nokudaro zvichiita kuti ishande zvakanaka mumashandisirwo chaiwo.
Nguva yekutumira: Gunyana-25-2024