Methylhydroxyethylcellulose (MHEC) chinhu chakakosha mumaindasitiri akasiyana, kunyanya mukuvaka, mishonga, uye zvigadzirwa zvekuchengeta munhu. Basa rayo rekutanga semumiriri wekuchengetedza mvura rinoita kuti ive yakakosha mukushandisa senge simende zvinhu, maumbirwo emishonga, uye zvekuzora.
1. Molecular Structure yeMHEC:
MHEC ndeyemhuri ye cellulose ethers, inotorwa kubva kune cellulose-inongoitika polima inowanikwa mumasero madziro emiti. MHEC inogadzirwa kuburikidza ne etherification ye cellulose, umo ese ari maviri methyl uye hydroxyethyl mapoka anounzwa pane cellulose musana. Iyo dhigirii yekutsiva (DS) yemapoka aya inosiyana, inokanganisa zvimiro zveMHEC senge solubility, viscosity, uye kugona kuchengetedza mvura.
2. Solubility uye Kupararira:
MHEC inoratidzira kunaka kunyungudika mumvura nekuda kwekuvapo kwe hydrophilic hydroxyethyl mapoka. Kana akaparadzirwa mumvura, mamorekuru eMHEC anopinda hydration, nemamorekuru emvura achigadzira hydrogen bond nemapoka ehydroxyl aripo padivi peselulosi. Iyi hydration process inoguma nekuzvimba kweMHEC particles uye kuumbwa kwemhinduro ye viscous kana kupararira.
3. Nzira Yekuchengeta Mvura:
Iyo nzira yekuchengetedza mvura yeMHEC ine zvakawanda uye inosanganisira akati wandei zvinhu:
a. Hydrogen Bonding: MHEC mamorekuru ane akawanda hydroxyl mapoka anokwanisa kuumba hydrogen bond nemamorekuru emvura. Kudyidzana uku kunowedzera kuchengetwa kwemvura nekuteya mvura mukati mepolymer matrix kuburikidza nehydrogen bonding.
b. Kuzvimba Kugona: Kuvapo kwemapoka maviri e-hydrophilic uye hydrophobic muMHEC inobvumira kuzvimba zvakanyanya kana yaiswa mumvura. Sezvo mamorekuru emvura achipinda mupolymer network, maketani eMHEC anozvimba, achigadzira gel-senge chimiro chinochengeta mvura mukati me matrix ayo.
c. Capillary Chiito: Mumabasa ekuvaka, MHEC inowanzowedzerwa kune simende zvinhu zvakaita sedhaka kana kongiri kuti ivandudze kushanda uye kuderedza kurasikirwa kwemvura. MHEC inoshanda mukati me capillary pores yezvinhu izvi, kudzivirira kukurumidza kubuda kwemvura uye kuchengetedza hunyoro hwakafanana. Ichi capillary chiito chinonyatso wedzera hydration uye kurapa maitiro, zvichitungamira kune yakagadziridzwa simba uye kusimba kwechigadzirwa chekupedzisira.
d. Firimu-Kuumba Zvivakwa: Pamusoro pekugona kwayo kuchengetedza mvura mumhinduro dzakawanda, MHEC inogonawo kugadzira mafirimu matete kana akaiswa pamusoro. Aya mafirimu anoita sezvipingamupinyi, kuderedza kurasikirwa kwemvura kuburikidza nekuputika uye kupa dziviriro kubva pakushanduka kwehunyoro.
4. Pesvedzero yeDhigirii reKutsiva (DS):
Iyo dhigirii yekutsiva methyl uye hydroxyethyl mapoka pane cellulose musana inokanganisa zvakanyanya kuchengetedza kwemvura kweMHEC. Hunhu hwepamusoro hweDS hunowanzo konzera huwandu hwekuchengetedza mvura nekuda kwekuwedzera hydrophilicity uye cheni inoshanduka. Nekudaro, yakawandisa yakakwira DS kukosha kunogona kutungamirira kune yakawandisa viscosity kana gelation, zvichikanganisa processability uye kuita kweMHEC mumashandisirwo akasiyana.
5. Kudyidzana Nezvimwe Zvikamu:
Mukugadzirisa kwakaoma kwakadai semishonga kana zvigadzirwa zvekuchengeta munhu, MHEC inopindirana nezvimwe zvinoshandiswa, zvinosanganisira mashizha anoshanda, surfactants, uye thickeners. Kudyidzana uku kunogona kukanganisa kugadzikana kwese, viscosity, uye kugona kwekuumbwa. Semuenzaniso, mukumisikidzwa kwemishonga, MHEC inogona kubatsira kumisa zvinhu zvinoshanda zvakaenzana mukati mechikamu chemvura, kudzivirira sedimentation kana kuunganidza.
6. Mafungiro Ezvakatipoteredza:
Nepo MHEC ichigoneka uye ichiwanzoonekwa seine hushamwari kwezvakatipoteredza, kugadzirwa kwayo kunogona kusanganisira maitiro emakemikari anoburitsa tsvina kana nezvigadzirwa. Vagadziri vari kuwedzera kuongorora nzira dzakasimba dzekugadzira uye kutsvaga cellulose kubva kune inovandudzwa biomass masosi kuti vaderedze kukanganisa kwezvakatipoteredza.
7. Mhedziso:
Methylhydroxyethylcellulose (MHEC) inoshandiswa zvakasiyana-siyana-inochengetedza mvura ine zvikumbiro zvakasiyana mumaindasitiri akasiyana. Chimiro chayo chemolecular, kunyungudika, uye kudyidzana nemvura kunoigonesa kuchengetedza unyoro, kunatsiridza kushanda, uye kuwedzera mashandiro ezviumbwa. Kunzwisisa mashandisirwo ekushanda kweMHEC kwakakosha pakugadzirisa mashandisirwo ayo mumashandisirwo akasiyana uchifunga zvinhu zvakaita sedhigirii rekutsiva, kuenderana nezvimwe zvinongedzo, uye kufunga kwezvakatipoteredza.
Nguva yekutumira: Mar-19-2024