Hydroxyethyl Cellulose (HEC) uye hydroxypropyl cellulose (HPC) ndiwo maviri anowanzo shandiswa seruseruse zvinobva. Vane mimwe misiyano yakakosha mukuumbwa, kuita uye kushandisa.
1. Chimiro chemakemikari
Hydroxyethyl cellulose (HEC): Hydroxyethyl cellulose inoumbwa nekuunza hydroxyethyl boka (-CH₂CH₂OH) pane cellulose molecule. Iro hydroxyethyl boka rinopa HEC yakanaka solubility uye kugadzikana.
Hydroxypropyl Cellulose (HPC): Hydroxypropyl cellulose inoumbwa nekuunza boka re hydroxypropyl (-CH₂CHOHCH₃) pane cellulose molecule. Kuunzwa kwemapoka ehydroxypropyl kunopa HPC akasiyana solubility uye viscosity maitiro.
2. Solubility
HEC: Hydroxyethylcellulose ine yakanaka solubility mumvura uye inogona kugadzira yakajeka colloidal mhinduro. Kunyungudika kwayo kunoenderana nehuwandu hwekutsiviwa kwemapoka ehydroxyethyl (kureva nhamba yemapoka ehydroxyethyl pachikamu cheglucose).
HPC: Hydroxypropyl cellulose ine kumwe kunyungudika mumvura uye organic zvinonyungudutsa, kunyanya muorganic solvents senge ethanol. Kunyungudika kweHPC kunokanganisa zvakanyanya nekupisa. Sezvo tembiricha inowedzera, kunyungudika kwayo mumvura kunoderera.
3. Viscosity uye rheology
HEC: Hydroxyethyl cellulose ine high viscosity mumvura uye inoratidza zvinhu zvepseudoplastic fluid, kureva shear thinning. Kana shear inoshandiswa, viscosity yayo inoderera, zvichiita kuti zvive nyore kushandisa nekushandisa.
HPC: Hydroxypropyl cellulose ine yakaderera viscosity uye inoratidza yakafanana pseudoplasticity mumhinduro. HPC mhinduro dzinogonawo kugadzira macolloid akajeka, asi viscosity yavo kazhinji yakaderera pane HEC.
4. Nzvimbo dzekushandisa
HEC: Hydroxyethyl cellulose inoshandiswa zvakanyanya mukuputira, zvivakwa zvekuvaka, zvizorwa, detergents nemimwe minda. Sezvinoita thickener, stabilizer uye suspending agent, inogona kunyatso kudzora viscosity uye rheology yehurongwa. Mune pendi uye machira, HEC inodzivirira pigment kugadzika uye inovandudza coating level.
HPC: Hydroxypropyl cellulose inonyanya kushandiswa mumishonga, chikafu, cosmetics uye mamwe minda. Muindasitiri yemishonga, HPC inowanzoshandiswa sebhainda uye inodzorwa kuburitsa mumiriri wemapiritsi. Muindasitiri yezvekudya, inogona kushandiswa seyakakora uye emulsifier. Nekuda kwekunyungudika kwayo mune organic solvents, HPC inoshandiswawo mune zvimwe zvekupfeka uye membrane zvinhu.
5. Kugadzikana uye kusimba
HEC: Hydroxyethyl cellulose ine kugadzikana kwakanaka kwemakemikari uye kusimba, haigoni kuchinjwa nepH kuchinja, uye inoramba yakagadzikana panguva yekuchengetedza. HEC inoramba yakagadzikana pasi pepamusoro uye pasi pH mamiriro.
HPC: Hydroxypropyl cellulose inonzwa kushanduka kwekushisa uye pH, uye inowanzoita gelation kunyanya pakupisa kwepamusoro. Kugadzikana kwayo kuri nani pasi pemamiriro e acidic, asi kugadzikana kwayo kuchaderedzwa pasi pemamiriro e alkaline.
6. Zvakatipoteredza uye biodegradability
HEC: Hydroxyethyl cellulose inotorwa kubva kune yakasikwa cellulose, ine biodegradability yakanaka uye inoshamwaridzana nenharaunda.
HPC: Hydroxypropyl cellulose zvakare i biodegradable material, asi maitiro ayo ekushatisa anogona kusiyana nekuda kwekunyungudika kwayo uye kusiyana kwekushandisa.
Hydroxyethyl cellulose uye hydroxypropyl cellulose zvinhu zviviri zvakakosha zve cellulose. Kunyangwe ivo vese vachigona kukora, kudzikamisa uye kugadzira colloids, nekuda kwekusiyana kwemaitiro, vane misiyano mukunyungudika, viscosity, uye minda yekushandisa. Pane musiyano mukuru mukugadzikana. Sarudzo yekuti ndeipi cellulose derivative yekushandisa zvinoenderana nezvinodiwa zvekushandisa uye zvinodiwa nekuita.
Nguva yekutumira: Aug-08-2024