I. Nhanganyaya
Hydroxyethyl Cellulose (HEC) isiri-ionic mvura-inonyungudika polima inoshandiswa zvakanyanya mukubvisa oiri, machira, kuvaka, makemikari ezuva nezuva, kugadzira mapepa nemimwe minda. HEC inowanikwa nekugadziriswa kwekemikari ye cellulose, uye zvimiro zvayo uye mashandisirwo ayo anonyanya kutsanangurwa neiyo hydroxyethyl substituents pane cellulose mamorekuru.
II. Nzira yekugadzira
Nzira yekugadzira yeHEC inonyanya kusanganisira matanho anotevera: cellulose etherification, kugeza, kupera mvura mumuviri, kuomesa uye kugaya. Izvi zvinotevera sumo yakadzama kune yega yega nhanho:
Cellulose etherification
Cellulose inotanga kurapwa nealkali kuita alkali cellulose (Cellulose Alkali). Izvi zvinowanzoitwa mu reactor, uchishandisa sodium hydroxide mhinduro kurapa yakasikwa cellulose kuumba alkali cellulose. Iyo Chemical reaction ndeyotevera:
Sero-OH+NaOH→Sero-O-Na+H2OSero-OH+NaOH→Sero-O-Na+H 2O
Zvadaro, alkali cellulose inopindirana ne ethylene oxide kuumba hydroxyethyl cellulose. Kuita kunoitwa pasi pekumanikidzwa kwakanyanya, kazhinji 30-100 ° C, uye maitiro chaiwo ndeaya anotevera:
Sero-O-Na+CH2CH2O→Sero-O-CH2CH2OHCSero-O-Na+CH 2CH 2O→Sero-O-CH 2CH 2OH
Kuita uku kunoda kunyatso kudzora tembiricha, kudzvanywa uye huwandu hweethylene oxide yakawedzerwa kuti ive nechokwadi chekufanana uye kunaka kwechigadzirwa.
Washing
Mhedzisiro inoguma HEC inowanzove ine unreacted alkali, ethylene oxide uye zvimwe ne-zvigadzirwa, izvo zvinoda kubviswa nemvura yakawanda yekugeza kana organic solvent washings. Mvura yakawanda inodiwa panguva yekugeza mvura, uye mvura yakasvibiswa mushure mekugeza inoda kurapwa uye kubudiswa.
Kupera mvura mumuviri
Iyo yakanyorova HEC mushure mekugezwa inoda kuderedzwa, kazhinji nevacuum filtration kana centrifugal separation kuti kuderedze hunyoro hwemukati.
Kuomesa
Iyo HEC yakaomeswa yakaomeswa, kazhinji nekupfapfaidza kuomesa kana flash kuomesa. Tembiricha uye nguva zvinofanirwa kudzorwa zvakanyanya panguva yekuomeswa kuitira kudzivirira kuderera kwekushisa kwakanyanya kana kusangana.
Kukuya
Iyo yakaomeswa HEC block inoda pasi uye kusefa kuti iwane yunifomu particle size kugovera, uye pakupedzisira kugadzira hupfu kana granular chigadzirwa.
III. Maitiro ekuita
Kunyungudika kwemvura
HEC ine mvura yakanaka yekunyungudika uye inogona kunyungudika nekukurumidza mumvura inotonhora uye inopisa kuti igadzire mhinduro yakajeka kana inopenya. Iyi solubility pfuma inoita kuti ishandiswe zvakanyanya seyakakora uye inodzikamisa mumachira uye zvigadzirwa zvemazuva ese zvemakemikari.
Kukora
HEC inoratidza yakasimba thickening mhedzisiro mune aqueous solution, uye viscosity yayo inowedzera nekuwedzera kwema molecular weight. Ichi chivakwa chakakora chinoigonesa kuita basa mukukora, kuchengetedza mvura uye kuvandudza mashandiro ekuvaka mumachira-akavakirwa mvura uye madhaka ekuvaka.
Rheology
HEC aqueous solution ine yakasarudzika rheological properties, uye viscosity yayo inoshanduka nekuchinja kweshear rate, ichiratidza shear kuonda kana pseudoplasticity. Iyi rheological pfuma inoigonesa kugadzirisa fluidity uye kuita kwekuvaka mumachira uye mafuta ekuchera zvinwiwa.
Emulsification uye kumiswa
HEC ine yakanaka emulsification uye kuturika zvivakwa, izvo zvinogona kudzikamisa zvimedu zvakamiswa kana madonhwe muhurongwa hwekuparadzira kudzivirira stratification uye sedimentation. Nokudaro, HEC inowanzoshandiswa muzvigadzirwa zvakadai se emulsion coatings uye kumiswa kwezvinodhaka.
Biodegradability
HEC ndeye yakasikwa cellulose derivative ine yakanaka biodegradability, isina kusvibiswa kune zvakatipoteredza, uye inosangana nezvinodiwa zvegirinhi kuchengetedza kwezvakatipoteredza.
IV. Minda Yekushandisa
Coatings
Mumvura-based coatings, HEC inoshandiswa seyakakura uye yakagadzikana kuti ivandudze fluidity, kuita kwekuvaka uye anti-sagging zvinhu zvekupfeka.
Kuvaka
Muzvivakwa zvekuvaka, HEC inoshandiswa musimende-based mortar uye putty poda kuvandudza kuita kwekuvaka uye kuchengetedza mvura.
Daily Chemicals
Mune detergents, shampoos, uye mazino emazino, HEC inoshandiswa seyakasimba uye yakagadzikana kuvandudza kunzwa uye kugadzikana kwechigadzirwa.
Oilfields
Mumafuta ekuchera uye fracturing zvinwiwa, HEC inoshandiswa kugadzirisa rheology uye kumiswa zvimiro zvezvinwiwa zvekuchera uye kunatsiridza kuchera nekuchengetedzeka.
Kugadzira mapepa
Mukugadzira mapepa, HEC inoshandiswa kudzora pulp fluidity uye kugadzirisa kufanana uye pamusoro pezvinhu zvepepa.
Hydroxyethyl cellulose (HEC) yakashandiswa zvakanyanya mumaindasitiri mazhinji nekuda kwekunyungudika kwayo kwemvura, kukora, rheological zvivakwa, emulsification uye kumiswa zvivakwa, pamwe nekunaka biodegradability. Magadzirirwo ayo ekugadzira anenge akura. Kuburikidza nematanho e-cellulose etherification, kushambidza, kupera mvura, kuomeswa uye kugaya, HEC zvigadzirwa nekushanda kwakadzikama uye hutano hwakanaka hunogona kugadzirirwa. Mune ramangwana, nekuvandudzwa kwezvinodiwa zvekuchengetedza kwezvakatipoteredza uye kufambira mberi kwehunyanzvi, tarisiro yekushandiswa kweHEC ichave yakakura.
Nguva yekutumira: Jul-02-2024