Hydroxyethyl cellulose (HEC) isiri-ionic, mvura-inonyungudika polima inotorwa kubva muselulosi, inongoitika polima inowanikwa mumadziro emiti.Inoshandiswa zvakanyanya mumaindasitiri akasiyana akadai semishonga, zvizorwa, pendi, zvinonamira, uye zvigadzirwa zvechikafu nekuda kwezvakasiyana zvimiro zvakaita sekukora, kudzikamisa, uye kugona kuchengetedza mvura.Nekudaro, kukurukura nezve pH kukosha kweHEC kunoda kunzwisisa kwakakura kwezvivakwa zvayo, chimiro, uye mashandisiro.
Kunzwisisa Hydroxyethyl Cellulose (HEC):
1. Kuumbwa Kwemakemikari:
HEC inogadzirwa nekuita kwe cellulose ne ethylene oxide, zvichikonzera kuunzwa kwemapoka e-hydroxyethyl (-CH2CH2OH) pamusana we cellulose.
Iyo dhigirii yekutsiva (DS) inoreva huwandu hweavhareji yemapoka ehydroxyethyl paglucose unit muketani ye cellulose uye inosarudza zvimiro zveHEC.Yakakwirira DS tsika dzinotungamira kuwedzera kunyungudika kwemvura uye kuderera kwe viscosity.
2. Properties:
HEC inonyungudika mumvura uye inoumba mhinduro dzakajeka, izvo zvinoita kuti ive yakakodzera kune dzakasiyana siyana zvinoda kuumbwa kwakajeka.
Iyo inoratidza pseudoplastic maitiro, zvichireva kuti viscosity yayo inodzikira pasi pekunetseka kweshear, ichibvumira kushandisa nyore uye kubata.
Iyo viscosity yeHEC mhinduro inokonzerwa nezvinhu zvakaita sekutarisa, tembiricha, pH, uye kuvapo kwemunyu kana zvimwe zvinowedzera.
3. Zvikumbiro:
Pharmaceuticals: HEC inoshandiswa seyakakora uye inodzikamisa mumuromo uye topical mishonga yekugadzira senge mafuta ekuzora, makirimu, uye kumiswa.
Cosmetics: Icho chinhu chakajairika muzvigadzirwa zvekuchengetedza munhu zvinosanganisira shampoos, lotions, uye makirimu nekuda kwekukora uye emulsifying zvivakwa.
Paints uye Coatings: HEC inowedzerwa kune pendi, machira, uye zvinonamira kudzora viscosity, kunatsiridza kuyerera zvivakwa, uye kuwedzera firimu kuumbwa.
Indasitiri yeChikafu: Muzvigadzirwa zvechikafu, HEC inoshanda seyakakora, stabilizer, uye emulsifier muzvinhu zvakaita sososi, madhirezi, uye zvigadzirwa zvemukaka.
pH Kukosha kweHydroxyethyl Cellulose (HEC):
1. pH Kutsamira:
Iyo pH yemhinduro ine HEC inogona kupesvedzera maitiro ayo uye kuita kwayo mumashandisirwo akasiyana siyana.
Kazhinji, HEC yakagadzikana pamusoro pehupamhi hwepH, kazhinji pakati pepH 2 uye pH 12. Zvisinei, yakanyanyisa pH mamiriro ezvinhu anogona kukanganisa maitiro ayo uye kugadzikana.
2. pH Migumisiro paViscosity:
Iyo viscosity yeHEC mhinduro inogona kuve pH-inotsamira, kunyanya pakakwirira kana yakaderera pH kukosha.
Pedyo nekwakarerekera pH renji (pH 5-8), HEC mhinduro dzinowanzo ratidza yavo yakanyanya viscosity.
Pane yakaderera kana yakakwira pH kukosha, iyo cellulose musana inogona kuita hydrolysis, zvichikonzera kuderera kwe viscosity uye kugadzikana.
3. pH Kugadziriswa:
Mumagadzirirwo apo pH inogadziriswa inodiwa, mabuffers anowanzo shandiswa kuchengetedza inodiwa pH renji.
Mabhafa akajairwa akadai secitrate kana phosphate buffers anowirirana neHEC uye anobatsira kudzikamisa zvivakwa zvayo mukati meiyo pH renji.
4. Mafungiro Ekushandisa:
Vagadziri vanofanirwa kufunga nezve pH kuenderana kweHEC nezvimwe zvinongedzo mukugadzira.
Mune zvimwe zviitiko, kugadziriswa kwepH yekugadzirwa kunogona kudiwa kuti uwedzere kushanda kweHEC.
Hydroxyethyl cellulose (HEC) i polymer inoshandiswa zvakasiyana-siyana ine kushandiswa kwakapararira mumaindasitiri akasiyana siyana.Nepo kugadzikana kwayo pH kunowanzo kusimba pamusoro pehupamhi, pH yakanyanyisa inogona kukanganisa kuita kwayo uye kugadzikana.Kunzwisisa kutsamira kwepH kweHEC kwakakosha pakugadzira zvigadzirwa zvinoshanda uye zvakagadzikana mumishonga, zvizorwa, pendi, zvinonamira, uye zvigadzirwa zvekudya.Nekutarisa pH kuenderana uye kushandisa nzira dzakakodzera dzekugadzira, HEC inogona kuramba ichishanda sechinhu chakakosha mumhando dzakasiyana dzekushandisa.
Nguva yekutumira: Kubvumbi-15-2024