Hydroxypropyl methylcellulose (HPMC) is nonionic cellulose ether yakagadzirwa kubva ku cellulose kuburikidza nekugadzirisa kemikari. Seyakakosha mvura-inonyungudika polymer zvinhu, HPMC inoshandiswa zvakanyanya mukuvaka, mishonga yemishonga, chikafu, zvizorwa uye mamwe minda. Maitiro eHPMC mumvura anonyanya kukosha nekuti anotarisisa mashandisiro ayo mumhinduro, kusanganisira kukora, kumiswa, kusungirira uye kugona kugadzira firimu.
HPMC kuzvimba nzira mumvura
HPMC ichazvimba zvakanyanya mumvura. Kuzvimba uku kunonyanya kukonzerwa nekubatanidzwa kwehydrogen pakati pemapoka ehydroxyl nemethoxy muHPMC mamorekuru chimiro nemamorekuru emvura. Kana HPMC ikasangana nemvura, mamorekuru emvura anozopinda pakati pezvikamu zveketani zvemamorekuru eHPMC, achityora zvisungo zvehydrogen pakati pemamorekuru, kutambanudza zvikamu zveketani uye kuwedzera vhoriyamu yemamorekuru. Maitiro aya ndiwo atinodaidza kuti "kuzvimba" chiitiko.
Kunyanya, apo HPMC inoputika mumvura, inotanga kutora mvura uye inotanga kuzvimba, uye zvishoma nezvishoma inoumba viscous colloidal solution. Iyi nzira inosanganisira nhanho huru mbiri: imwe ndiyo nhanho yekukurumidza yekutanga kuzvimba, uye imwe ndiyo inotevera inononoka kupera. Muchikamu chekutanga, HPMC inotora mvura kuti igadzire mahydrates akazvimba, maitiro anowanzopedzwa mukati memaminitsi mashomanana. Mune ino nhanho, mamorekuru emvura anokurumidza kupinda muzvikamu zveHPMC, zvichiita kuti vhoriyamu yavo iwedzere. Sezvo mvura ichipinda ichiwedzera, mamorekuru eHPMC anopatsanuka zvishoma nezvishoma kubva kune akasimba masisitimu uye anopinda mugadziriso kuti aumbe yunifomu ine aqueous solution.
Zvinhu zvinokanganisa kuzvimba kweHPMC mumvura
Tembiricha: Tembiricha ine mhedzisiro yakakosha pakuzvimba maitiro eHPMC mumvura. Kazhinji kutaura, sezvo tembiricha inowedzera, chiyero chekunyungudika cheHPMC chinowedzera uye chiyero chekuzvimba chiri pachena. Izvi zvinodaro nekuti simba rekinetic remamorekuru emvura rinowedzera pakupisa kwakanyanya, zvichiita kuti zvive nyore kupinda pakati pezvikamu zveHPMC mamorekuru uye kukurudzira kuwedzera kwavo. Nekudaro, tembiricha yakawandisa inogona kukonzera kuderera kweHPMC uye kukanganisa hunhu hwayo hwekunyungudika.
Viscosity giredhi: HPMC ine akasiyana e viscosity mamakisi. Iyo yakakwirira viscosity yeHPMC, iyo inowedzera viscous iyo colloidal mhinduro inoumbwa kana ichizvimba mumvura. Kana HPMC ine yakakwira viscosity giredhi ichizvimba, mamorekuru emvura anopinda zvishoma nezvishoma uye nzira yekunyungudutsa inoenderana kureba. HPMC ine yakaderera viscosity giredhi iri nyore kunyungudutsa uye inoumba yakatetepa mhinduro.
pH kukosha kwemhinduro: HPMC ine imwe shanduko kune pH kukosha. HPMC ine kuzvimba kurinani kuita pasi pekusarerekera kana kusimba asidhi mamiriro. Pasi peasidhi yakasimba kana yakasimba alkaline mamiriro, iyo molecular chimiro cheHPMC inogona kuchinja, nokudaro ichikanganisa kuzvimba kwayo uye kunyungudika maitiro.
Concentration: Iko kusungirirwa kweHPMC mhinduro mumvura kunokanganisawo kuzvimba kwayo. Pakudzika kwakadzika, HPMC iri nyore kunyungudika zvachose uye kugadzira imwe yunifomu mhinduro. Pakukwirira kwakanyanya, kudyidzana pakati peHPMC mamorekuru kunowedzera, izvo zvinogona kuita kuti mamwe mamorekuru ave akaoma kunyungudika zvachose mumvura uye kugadzira mabhuroko egel.
Kushanda kushandiswa kweHPMC kuzvimba
Iyo yekuzvimba zvimiro zveHPMC inoita basa rakakosha mumashandisirwo anoshanda. Semuyenzaniso, muindasitiri yemishonga, HPMC inoshandiswa zvakanyanya mumapiritsi anoburitswa. Nemhaka yokuti inoputika mumvura kuti iite firimu recolloidal, inogona kunyatsogadzirisa kusunungurwa kwemushonga, zvichiita kuti irebe nguva yekuita zvinodhaka.
Muindastiri yekuvaka, HPMC inowanzo shandiswa sechinhu chakakora uye chinochengeta mvura kune simende uye gypsum-based materials. Kuzvimba kwayo kunokwanisa kuvandudza kunamatira uye kuvaka kwekuita kwezvishandiso, uku ichichengeta unyoro, kuwedzera nguva yekumisikidza yezvigadzirwa, nekuvandudza simba remakanika uye kutsvedzerera kwepasi kwezvigadzirwa zvakapedzwa.
Mumaindasitiri ezvekudya uye zvekuzora, HPMC inoitawo basa rakakosha seyakakora uye inodzikamisa. Hunhu hwayo hwekuzvimba hunogona kupa chikafu kuravira uye magadzirirwo ari nani, nepo mune zvekuzora, HPMC inobatsira kugadzira yunifomu yekushandisa mhedzisiro uye kuchengetedza hunyoro.
Kuzvimba maitiro eHPMC mumvura mhedzisiro yekudyidzana pakati pechimiro chayo chemakemikari nemamorekuru emvura. Nekugadzirisa zvinhu zvakadai sekushisa, pH kukosha, viscosity giredhi uye kusungirirwa kwemhinduro, kuzvimba uye kupera kweHPMC mumvura inogona kudzorwa kuti isangane nezvido zvenzvimbo dzakasiyana dzekushandisa. Iyi yekuzvimba pfuma yeHPMC inoshandiswa zvakanyanya mumaindasitiri mazhinji, ichiratidza kukosha kwayo sechinhu chinoshanda chepolymer.
Nguva yekutumira: Aug-29-2024