Mhedzisiro yeHPMC ine viscosities dzakasiyana pakushanda kwekongiri

Hydroxypropyl methylcellulose (HPMC)imhando ye cellulose ether isingashandisi ionic inoshandiswa zvakanyanya muzvinhu zvekuvaka, kunyanya mudhaka nekongiri yakasanganiswa yakaoma, iyo inoita basa rekuchengetedza mvura, kukora, uye kuvandudza mashandiro ekuvaka. Kushanda kweHPMC kunokanganiswa zvakanyanya nekusimba kwayo, uye kune misiyano iri pachena mubasa reHPMC nekusimba kwakasiyana mukongiri.

1. Maitiro ekutanga ekushanda kweHPMC

HPMC ipolymer inonyungudika mumvura inogona kugadzira mhinduro ine viscous kana colloid mumvura. Maitiro ayo makuru anosanganisira:

Kuchengetwa kwemvura: HPMC inogona kuvharira mvura isina chinhu pakutanga kwekunyoroveswa kwemvura nesimende, kudzivirira kurasikirwa nemvura, uye kuona kuti kufambira mberi kwekuita kwemvura kunofamba zvakanaka.

Kukobvura: HPMC inogona kuwedzera kusimba kwetsvina uye kuvandudza kudzivirira kupatsanurwa uye kuyerera kwekongiri.

Kugadzira firimu: HPMC inogona kugadzira firimu rinogara riripo pamusoro panguva yekuomesa, izvo zvinobatsira kuwedzera simba rekubatana kwemukati meganda.

HPMC ine viscosities dzakasiyana ine mashandiro akasiyana mumhedzisiro dziri pamusoro apa, izvo zvine simba rakawanda pakushanda kwekongiri.

2. Migumisiro chaiyo ye HPMC viscosity pakushanda kwekongiri

2.1. Mhedzisiro pakuchengetwa kwemvura

Kuchengetwa kwemvura ndeimwe yehunhu hwakakosha hweHPMC. HPMC ine viscosity yakaderera (semuenzaniso, isingasviki 50,000 mPa·s) ine mvura shoma uye yakakodzera masisitimu anoda kuburitswa kwemvura nekukurumidza, senge plaster mortar. HPMC ine viscosity yepakati nepakakwirira (semuenzaniso, 100,000 kusvika 200,000 mPa·s) inoratidza kuchengetedza mvura zviri nani mukongiri, izvo zvinogona kudzivirira kubuda kwemvura uye kubuda kwemvura nguva isati yakwana, nokudaro zvichiita kuti simende irambe ichinyoroveswa. Kunyanya, kushandiswa kweHPMC ine viscosity yakawanda munzvimbo dzakaoma kana mabhesi anonyudza mvura zvakanyanya kunogona kuvandudza zvakanyanya kuramba kwe shrinkage uye kukura kwesimba rekongiri nekukurumidza.

2.2. Mhedzisiro pakushanda zvakanaka

HPMC inogona kuvandudza zvakanyanya kunaka kwekongiri uye kushanda kwayo. Nekuda kwekunyungudika kwayo nekukurumidza, HPMC ine viscosity shoma inogona kupararira nekukurumidza musystem, izvo zvinobatsira kuvandudza kuyerera kwemusanganiswa munguva pfupi; asi kuvandudzwa kwayo munguva yekuchengetedza kuyerera hakuna kunaka sekwezvigadzirwa zvine viscosity yakawanda. HPMC ine viscosity yakakura ine simba guru rekukora. Inogona kuvandudza kubatana kwemusanganiswa mukongiri, kuderedza kubuda ropa uye kupatsanurwa, asi viscosity yakanyanya inogonawo kukonzera kuyerera kwekongiri kudzikira, uye zviri nyore kukonzera matambudziko akadai sekunamatira pabhare uye kuwedzera kuramba kwekupomba panguva yekuvaka. Saka, mukushandisa, zvakakosha kusarudza zvigadzirwa zveHPMC zvine viscosity yakakodzera zvichienderana nenzira yekuvaka (senge plaster nemaoko, spraying, uye pumping).

2.3. Mhedzisiro panguva yekuisa

HPMC inewo mukana wekunonoka panguva yekugadzika kwekongiri, kunyanya zvigadzirwa zvepakati nepakati uye zvakakwirira, zvine zvidimbu zvesimende zvakavharirwa zvakasimba, zvinodzivisa kuburitswa kwekupisa kwemvura, uye zvinononotsa maitiro ekunyorovesa simende. Kazhinji, sezvo HPMC ichiwedzera, tsika yayo yekunonokesa kugadzika inonyanya kukosha. Mukuvaka chaiko, kunonoka uku kunobatsira kuwedzera nguva yekushanda kwekongiri, asi chiyero chinofanira kudzorwa munguva yechando kana mamiriro ekunze akaderera kudzivirira nguva yakawandisa yekugadzika inokanganisa kufambira mberi kweprojekiti.

2.4. Mhedzisiro pakukura kwesimba

HPMC pachayo haibatanidzwi mukuita kwemvura inoyerera nesimende, uye kukanganisa kwayo simba resimende kunonyanya kuoneka muchikamu chekutanga chekugadzira simba. Kunyangwe HPMC ine viscosity yakakura ichichengetedza mvura zvakanaka, inononotsa kuita kwemvura inoyerera, izvo zvinogona kukonzera kudzikira kwesimba rekutanga. Zvisinei, muchikamu chekupedzisira, nekuti HPMC inovandudza mamiriro emvura inoyerera uye inoita kuti simende iwedzere simba, simba rekupedzisira rinowanzova rakagadzikana kana kutowedzera. Nokudaro, kusarudzwa kwakakodzera kwepakati-viscosity HPMC kunogona kufunga nezvesimba rekutanga uye kuchengetedza mvura zvakanaka, inova sarudzo yakanaka.

2.5. Mhedzisiro pahunhu hwekubatanidza

HPMCinogona zvakare kuvandudza simba rayo rekubatanidza nehwaro hwekongiri kana kuti dhaka. Izvi zvinokonzerwa nehunyanzvi hwayo hwekugadzira firimu, uye zvine chekuita nekuvandudzwa kwayo kwekutsvedza uye kubatana. Kazhinji, HPMC ine viscosity yakakura inogona kugadzira denderedzwa uye inoenderera mberi yekusunga, nokudaro ichivandudza simba rekubatanidza. Zvisinei, mukushanda kwakakodzera, kutarisirwa kunofanirwa kupihwa pakuyera simba rayo pakushanda kwekuvaka kudzivirira kuoma kwekukwenya nekuda kwekutsvedza kwakanyanya.

MaHPMC ane ma viscosity akasiyana ane zvakanakira nezvakaipira pa simende. Kazhinji:

Kunyungudika kwakaderera kweHPMC: kunyungudika nekukurumidza, kushanda zvakanaka, asi kuchengetedza mvura shoma uye mhedzisiro yekukora;

Kusviba kwepakati nepakati kweHPMC (senge 70,000-150,000 mPa·s): tichifunga nezvekuchengetedza mvura, kukora kwayo uye kugona kwayo kushanda, pari zvino ndiyo inonyanya kushandiswa;

Kusviba kwakanyanya kweHPMC (kupfuura 200,000 mPa·s): Inochengetedza mvura zvakanaka, asi ine simba guru pakuyerera kwemvura, yakakodzera mamiriro ekushanda ane zvinodiwa zvakanyanya zvekudzora kuyerera kwemvura, zvakaita sedhaka repamusoro uye chinamira chemataira kana yakavakwa nekupisa kwakanyanya kana mamiriro ekunze akaoma.