Cellulose ether ndiyo yakakosha kuvaka zvinhu zvinowedzera, inoshandiswa zvakanyanya mukuvaka motsi, poro poda, kuunganidza uye zvimwe zvigadzirwa zvekuvandudza zvivakwa zvemuviri uye kuita kwekuvaka kwezvinhu zvacho. Izvo zvinhu zvikuru zve cellulose ether zvinosanganisira iyo cellulose Basic chimiro uye iyo inodzika yakaunzwa nekugadziridzwa kwemakemikari, iyo inopa iyo yakasarudzika solubility, inokonzeresa, kudzokorora kwemvura uye zvidzitiro zvemvura uye zvimedu zvemvura.
1. Cellulose Basic chimiro
Cellulose ndeimwe yemapolsacchararides mune zvakasikwa, inonyanya kutorwa kubva kumuchero. Iyo ndiyo chikamu chepakati che cellulose ether uye inosarudza yayo yekutanga chimiro uye zvivakwa. Cellulose Molecules anoumbwa neGlucose zvikamu zvakabatana ne β-3,4-glycosic zvisungo kuti ugadzire keteni refu. Iyi mutsara wemutsara inopa cellilose simba rakanyanya uye rakakura sorrefu, asi iyo solubility mumvura ine murombo. Kuti uvandudze mvura solubility yemvura uye kujairana nezvinodiwa zvekuvakwa, cellulose inoda kuchinjwa nemakemikari.
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Izvo zvakasarudzika zvema cellulose ether zvinonyanya kuwanikwa nezvakadzvanywa zvakaunzwa neiyo itsteification yekuita pakati peiyo hydroxyl group (-OOH) ye cellulose uye ether makomendi. Zvakajairika Sticktuer inosanganisira nzira (-Och₃), ethoxy (-oc₂h₅) uye hydroxyprupyl (-ch₂chchch₃). Iko kusuma kweaya anotsiva kunochinja iyo solubility, kureruka uye kwemvura kuchengetedza kwemheremellose. Maererano nezvakasiyana zvakaunzwa, cellaulose ethsl vanokamurwa mu methyl cellulose (hydroxytl cellulose (Hec), hydroxyprosll methelose (HPMC) uye mamwe marudzi.
Methyl Cellulose (MC): Methyl Cellelose inoumbwa nekuunza methyl Explesl (-Och₃) mumagariro eHydroxyl muCellulose Molecule. Iyi cellulose ether ine yakanaka mvura solubility uye yakakora nzvimbo uye inoshandiswa zvakanyanya mune yakaoma murudzi, zvinonamatira uye zvipfuyo. MC ine yakanakisa kudzokorora kwemvura uye inobatsira kuderedza kurasikirwa kwemvura muzvivakwa zvekuvaka, kuve nechokwadi chekushamisika uye kusimba kwemutema uye poro poda.
Hydroxethyl Cellulose (HEC): HydroxytHextl Cellulose inoumbwa nekuunza hydroxyt Exposter (-oc₂h₅), inoiita kuti iite kuti ive yakawanda-inonyura uye ine munyu. HEC inowanzo shandiswa mumakororo emvura-yakavakirwa mvura, pendi yeLatex uye zvekuvakira. Iyo ine yakanaka kwazvo yakakora uye mafirimu ekuumba midziyo uye inogona kugadzirisa zvakanyanya kukosha kwekuvaka mashandiro emidziyo.
HydroxyPropyl methylcellose (HPMC): HPMC Rudzi urwu rwe cellulose ether inoratidzira kuchengetedza kwemvura yakanakisa, Lubricity uye yekuvhenekera mukuvakisa midziyo yakadai sedanda rakaoma, madhiri akaoma, uye kunze kwemadziro ekunze masisitimu. HPMC zvakare ine yakanaka kupisa kupisa uye kupokana nechando, saka kunogona kunatsiridza zvinobudirira kuita kwekuvakwa kwezvivakwa pasi pemamiriro ekunze akanyanya.
3. SoluBility yemvura uye kureruka
Iyo solubility yemvura ye cellulose ether zvinoenderana nemhando uye degree rekutsiva kweiyo substituent (kureva, nhamba yeiyo hydroxy mapoka yakatsiva pane yega yega glucose unit). Dhigirii yakakodzera yekutsiva inogonesa cellulose mamorekuru kuti aumbe mhedziso yemvura mumvura, ichipa iyo zvinhu zvakanaka zvakakora zvinhu. Muzvivakwa zvekuvaka, ma cellause ethers seanotiza vanogona kuwedzera visikopa yemota, dzivirira kusagadzikana uye kusarurana kwezvinhu, uye nekudaro kugadzirisa maitiro ekuvaka.
4. Kuchengeta mvura
Kuchengetwa kwemvura kwe cellulose ether kwakakosha kune kunaka kwezvinhu zvekuvaka. Muzvigadzirwa zvakaita sevhu uye putty poda, cellulose ether inogona kuumba firimu remvura remvura pamusoro pezvinyorwa zvekudzivirira nekukurumidza nekukurumidza, nekudaro zvichikwira nguva yakavhurika uye nekuvhenekera kwezvinhu zvacho. Izvi zvinotamba basa rakakosha mukuvandudza simba rekubatanidza uye kudzivirira kupaza.
5. Rheology nekushanda kwekuvaka
Kuwedzerwa kwemaserulose ether kunovandudza zvivakwa zve rateological ezvivakwa zvekuvaka, ndiko kuti, kuyerera uye maitiro ekudzora ezvisikwa pasi pemasimba ekunze. Inogona kuvandudza kuchengetwa kwemvura uye lubricity yemutya, wedzera kusimuka uye kusununguka kwekuvaka kwezvinhu. Mukuvaka kwakadai sekupfira, kupuruzira uye masonry, cellulose ether anobatsira kuderedza nekuvandudza kushanda kwebasa, nepo kunoita yunifomu yekuvhara pasina kusekerera pasina kusekerera pasina kuswedera.
6. Kuenderana uye kuchengetedza zvakatipoteredza
Cellulose ether ine zvakaringana nezvinhu zvakasiyana-siyana zvekuvakisa zvekuvakisa, zvinosanganisira cement, gypsum, etc. Munguva yekuvaka, hazvizoite zvimwe zvinhu zvemakemikari kuti uve nechokwadi chekugadzikana kwechinyorwa. Mukuwedzera, cellulose ether igirini uye zvakatipoteredza zvinowedzera, izvo zvinonyanya kutorwa kubva kune zvakasikwa zvirimwa zvemukati, hazvina basa kune zvakatipoteredza, uye zvinosangana nezvinodiwa zvezvakatipoteredza zvezvinhu zvazvino zvekuvaka.
7. Zvimwe zvinoshandurwa zvirimo
Kuti uenderere mberi nekuvandudza mashandiro e cellulose ether, zvimwe zvinoshandurwa zvirimo zvinogona kuunzwa mukugadzirwa chaiko. Semuenzaniso, vamwe vagadziri vanowedzera kudzikisira kwemvura uye kupokana kwemvura kwemheremello ether nekuwedzera neiyo silicone, paraffin uye zvimwe zvinhu. Kuwedzera kweaya midziyo yakagadziridzwa kazhinji inosangana chaiyo yekuzvishandisa zvinodiwa zvekushandisa, sekuwedzera iyo yekunyepedzera kwekunyepedzera-yekufungidzira uye kusimba kwekunze kwemadziro emadziro kana kuti mvura yemvura.
Sechikamu chakakosha muzvivakwa zvekuvaka, cellulose ether ane midziyo yakawanda, kusanganisira kuchengetwa kwemvura, uye nekuvandudzwa kwemvura, uye kwakavandudzwa zvivakwa zvetsiva. Zvikamu zvayo zvakakosha ndewe cellulose Basic chimiro uye izvo zvakawedzera zvakaunzwa neiyo eraitation maitiro. Mhando dzakasiyana dze cellulose ethers dzine mashandisirwo akasiyana uye zviitiko zvekuvaka zvakakonzerwa nemisiyano mune yavo substitue. Cellulose vaitininininininaninininha hazvigone kungovandudza kwekuvaka kwekuvaka, asi zvakare kugadzirisa hupenyu hwakawanda uye hupenyu hwebasa hwezvivakwa. Naizvozvo, cellulose ethers tarisiro yekushandisa mune zvazvino zvekuvaka.
Kutumira Nguva: Sep-18-2024