Methyl Hydroxyethyl Cellulose (MHEC) yakanyungudutswa mudura rakanyorova

Methyl Hydroxyethyl Cellulose (MHEC)imhando ye cellulose ether isingashandisi ionic inoshandiswa zvakanyanya mukuvaka, kunyanya mudhaka rakanyorova, uye ine basa rakakosha. Kunyungudika kwayo mumvura uye chimiro chayo chemamorekuru akawanda zvinoita kuti igadzire mhinduro ine viscous mumvura, zvichiita kuti dhaka rive rakanaka pakugadzirisa, kuchengetedza mvura uye kugona kuchinjika pakuvaka.

1. Hunhu hwekutanga hweMHEC

MHEC imhando ye ether inobva mu cellulose yakagadzirwa nekuisa methyl ne hydroxyethyl groups mu natural cellulose kuburikidza ne etherification reaction. Ine mvura inonyunguduka zvakanaka, inoita firimu, inochengetedza mvura uye inonamatira. Yakasimba mumamiriro ezvinhu asina kusimba uye ane alkaline uye ine biocompatibility yakanaka uye yakachengeteka nharaunda.

MHEC inonyungudika mumvura inotonhora patembiricha yemumba kuti igadzire mhinduro inopenya kusvika inopenya yecolloidal, uye hainyungudike mumvura inopisa kana muzvinhu zvakawanda zvinonyungudika zveorganic. Maitiro ayo ekunyungudika inzira yekuwedzera-kupararira-kunyungudika, uye haibatanidzi maitiro emakemikari.

2. Maitiro ekunyungudika kweMHEC mudhaka rakanyorova

Mudhaka rakanyorova, MHEC inowanzo wedzerwa mumusanganiswa wakaoma muchimiro cheupfu, yozonyungudika zvishoma nezvishoma panguva yekuwedzera mvura nekukurunga:

Danho rekutanga - kunyudzwa kwemvura nekuzvimba: Zvidimbu zveMHEC zvinonyudzwa mvura uye zvinozvimba pamusoro mushure mekusangana nemvura, zvichiita kuti pave nejeli.

Danho repakati - kupararira nekuzvimba: Nekukurunga, chikamu chechimiro checolloidal chinoparadzwa, uye MHEC inotanga kupararira muhurongwa hwese.

Danho rekupedzisira - kunyungudika kwakakwana: Mushure mekukurunga nguva dzose uye kwenguva yakati, MHEC inonyungudika zvachose kuti igadzire mhinduro yepolymer yakasimba, iyo inogoverwa zvakaenzana mumota.

Mukushandiswa kwemabasa chaiwo, mwero wekunyungudika kweMHEC unokanganiswa nekusimba kwekukurunga, tembiricha yemvura, saizi yezvidimbu, nezvimwe zvinhu zviri mufomura (senge simende, gypsum, jecha, nezvimwewo). Kudzora kwakakodzera kwezviyero izvi kunogona kudzivirira dambudziko rekuungana kana kunyungudika kusina kukwana.

3. Mabasa makuru eMHEC mumatope emvura

3.1. Wedzera kuchengetwa kwemvura

Mhedzisiro yakakosha yeMHEC ndeyekuvandudza zvakanyanya kugona kwekuchengetedza mvura mudhaka, kuderedza kukurumidza kwemvura inobuda, kuwedzera nguva yekuita kwemvura yesimbi, nokudaro zvichivandudza simba rekubatanidza, uye kudzivirira kutsemuka kwekutanga.

3.2. Kuvandudza mashandiro ekuvaka

Nekuda kwekunyorovesa uye kukora kweMHEC, dhaka iri rinogona kushanda zvakanaka, kuchinjika uye kupararira zvakanaka, zvichideredza kuoma kwekuvaka uye zvinovandudza kushanda zvakanaka. Kunyanya mukupurasita nekuisa mataira, rinogona kudzivirira dhaka kuti risadonhe nekutsvedza.

3.3. Kuvandudza mashandiro ekubatana

Maumbirwo e colloidal network anoumbwa neMHEC mumortar anowedzera simba rekubatana pakati pemortar ne base layer, kunyanya kana ichivakwa pamusoro pe vertical kana pamusoro, zvichiita kuti mortar isadonhe uye zvichiwedzera kuvimbika kwekuvakwa.

3.4. Gadzirisa kuenderana uye kuyerera kwechinhu

Nekugadzirisa huwandu hweMHEC, kuenderana uye maitiro e rheological edhaka rakanyorova zvinogona kudzorwa, kuitira kuti rive nekuyerera kwakakodzera, izvo zviri nyore kuvaka, uye hazvizokanganisi mhedzisiro yekuumba nekuda kwekuyerera kwakanyanya.

3.5. Kuvandudza mashandiro ekudzivirira kutsvedza

Mukushandiswa kwakadai sekunamatira emataira nematirera ekubatanidza, MHEC inogona kudzivirira kutsvedza kwematirera, kuvandudza kugadzikana kwekuvaka, uye kusangana nezvinodiwa zvekuvaka zvekunamatira zvakamira uye mataira makuru.

4. Mhedzisiro yemuyero weMHEC pakushanda kwemota

Huwandu hweMHEC hwekuwedzera hunowanzo dzorwa pakati pe0.1% ne0.5% (zvichienderana nehuwandu hwezvinhu zvakaoma). Mhedzisiro yehuwandu hwakasiyana pakushanda kwemortar ndeiyi inotevera:

Chipimo chidiki (<0.1%): kuchengetwa kwemvura kwavandudzika zvishoma, asi kuvandudzwa kwekushanda kwekuvaka hakusi pachena.

Chipimo chepakati nepakati (0.2% ~ 0.4%): Kushanda kwakanakisisa kwakakwana, kukura kwakaringana kwekuchengetedza mvura, kushanda kwekuvaka, uye simba rekubatanidza.

Kushandiswa zvakanyanya (>0.5%): Zvinogona kukonzera kukora kwakanyanya kwemota, kuderedza kuyerera kwemvura, uye kuwedzera nguva yekuisa.

Saka, mukugadzirwa kwefomura chaiyo, zvakakosha kuona huwandu hwakakodzera hwekuwedzera hweMHEC kuburikidza nekuyedza kuti uwane mhedzisiro yakakodzera yekushandisa.

5. Kushanda pamwe chete nezvimwe zvinowedzera

MHEC inogona kushandiswa pamwe chete nezvimwe zvinhu zvinobatsira, zvakaita se:

Neupfu hwelatex hunonyungudika (VAE): pamwe chete zvinovandudza kuchinjika uye simba rekubatanidza remortar;

Nevanodzosera shure: kunonotsa kunyoroveswa kwesimende, shandira pamwe neMHEC kuti uvandudze hwindo rekuvaka;

Nezvinhu zvinozadza/zvicherwa: batanidza kuyerera uye kukura kwesimba, simbisa chimiro chedhaka.

Sechinhu chakakosha chinobatsira mudhaka rakanyorova,hydroxyethyl methylcellulose (MHEC) inoita mabasa akawanda mukuwedzera kukora kwemasero, kuchengetedza mvura, kuvandudza uye kuvandudza kuvaka kwemota kuburikidza nehunhu hwayo hwakanaka hwekunyungudika mumvura. Icho chinhu chinowedzera kushanda kwepamusoro-soro muzvinhu zvekuvaka zvemazuva ano. Nekusarudza nesainzi mamodheru uye zviyero, MHEC inogona kuvandudza mashandiro akazara emota, kusangana nezvinodiwa zvemamiriro akasiyana ekuvaka, uye kubatsira kuvaka kwakasvibira uye kwakanaka.