IHydroxypropyl cellulose (HPC) iyi-polymer esetshenziswa kakhulu ezimbonini ezahlukahlukene, kufaka phakathi ezemithi, izimonyo, nemikhiqizo yokunakekela umuntu. Ivamise ukusetshenziswa njenge-ejenti yokuqina, i-stabilizer, ifilimu yangaphambili, kanye ne-viscosity modifier ngenxa yezakhiwo zayo ezihlukile. Kodwa-ke, uma kuxoxwa ngesincibilikisi se-HPC, kubalulekile ukuqaphela ukuthi izici zaso zokuncibilika zincike ezintweni ezifana nezinga lokushintshwa (DS), isisindo samangqamuzana, kanye nesistimu yezinyibilikisi ezisetshenziswayo. Ake sijule ezimpahleni ze-HPC, ukuziphatha kwayo kokuncibilika, nezincibilikisi ezihlukahlukene ezisetshenziswa nayo.
Isingeniso se-Hydroxypropyl Cellulose (HPC):
I-Hydroxypropyl cellulose iphuma ku-cellulose, lapho amaqembu e-hydroxypropyl eshintshwa kumgogodla we-cellulose. Lokhu kuguqulwa kushintsha izici zayo, kuyenze incibilike kakhulu kuzincibilikisi ezithile uma kuqhathaniswa neselulosi yomdabu. Izinga lokushintsha lithinta ukunyibilika, nge-DS ephezulu ephumela ekuncibilikeni okuthuthukisiwe kuzinyibilikisi ezingezona ze-polar.
Izimpawu zokuncibilika:
I-solubility ye-HPC iyahlukahluka kuye ngesistimu ye-solvent, izinga lokushisa, izinga lokushintshwa, nesisindo samangqamuzana. Ngokuvamile, i-HPC ibonisa ukuncibilika okuhle kuzo zombili izincibilikisi ezipholile nezingezona i-polar. Ngezansi ezinye izincibilikisi ezivame ukusetshenziselwa ukuncibilikisa i-HPC:
Amanzi: I-HPC ikhombisa ukuncibilika okulinganiselwe emanzini ngenxa yemvelo yawo ye-hydrophobic. Nokho, amamaki e-viscosity aphansi e-HPC anamanani aphansi e-DS angancibilika kalula emanzini abandayo, kuyilapho amamaki e-DS aphezulu angase adinge amazinga okushisa aphakeme ukuze ahlakazeke.
Utshwala: Utshwala obufana ne-ethanol ne-isopropanol yizincibilikisi ezivame ukusetshenziswa ku-HPC. Ziyizincibilikisi ze-polar futhi zingancibilikisa i-HPC ngempumelelo, zizenze zifanelekele izinhlelo zokusebenza ezihlukahlukene.
Izincibilikisi Ze-Chlorinated: Izincibilikisi ezifana ne-chloroform ne-dichloromethane zisebenza kahle ekuhlakazeni i-HPC ngenxa yekhono lazo lokuphazamisa ukubopha kwe-hydrogen kumaketanga e-polymer.
Ama-Ketones: Ama-ketones afana ne-acetone ne-methyl ethyl ketone (MEK) nawo asetshenziselwa ukuhlakaza i-HPC. Zihlinzeka ngokuncibilika okuhle futhi zivame ukusetshenziswa ekwakhiweni kwe-coatings kanye ne-adhesives.
Ama-Esters: Ama-Esters afana ne-ethyl acetate ne-butyl acetate angancibilikisa i-HPC ngempumelelo, anikeze ibhalansi enhle phakathi kokuncibilika nokuguquguquka.
Ama-Aromatic Hydrocarbons: Izinyibilikisi ezinephunga elimnandi njenge-toluene nexylene zisetshenziselwa ukuncibilikisa i-HPC, ikakhulukazi ezinhlelweni lapho kudingeka khona ukunyibilika okuphezulu.
Ama-Glycols: Ama-Glycol ethers afana ne-ethylene glycol monobutyl ether (EGBE) kanye ne-propylene glycol monomethyl ether acetate (PGMEA) angancibilikisa i-HPC futhi avame ukusetshenziswa ekuhlanganisweni nezinye izincibilikisi ukulungisa i-viscosity nezici zokomisa.
Izinto Ezithinta Ukunyibilika:
I-Degree of Substitution (DS): Amanani aphezulu e-DS ngokuvamile athuthukisa ukunyibilika njengoba ekhulisa i-hydrophilicity ye-polymer.
Isisindo samangqamuzana: Isisindo samangqamuzana aphansi Amamaki e-HPC avame ukuncibilika kalula uma kuqhathaniswa namabanga aphezulu esisindo samangqamuzana.
Izinga lokushisa: Amazinga okushisa aphakeme angathuthukisa ukuncibilika kwe-HPC, ikakhulukazi emanzini nakwezinye izincibilikisi ze-polar.
Izicelo:
Ezemithi: I-HPC isetshenziswa ekwenziweni kwemithi njenge-binder, disintegrant, kanye ne-ejenti yokukhululwa okuqhubekayo.
Imikhiqizo Yokunakekelwa Komuntu Siqu: Isetshenziswa emikhiqizweni ehlukahlukene yokunakekela umuntu efana namashampoos, izinto zokuthambisa, nama-creams njenge-thickener and stabilizer.
I-Industrial Coatings: I-HPC isetshenziswa ekwakhiweni kwe-coatings ukulawula i-viscosity nokuthuthukisa ukwakheka kwefilimu.
Imboni Yokudla: Embonini yokudla, i-HPC isetshenziswa njenge-ejenti ejiya futhi eqinisayo emikhiqizweni efana namasoso nama-dressings.
I-Hydroxypropyl cellulose iyi-polymer eguquguqukayo enezinhlobonhlobo zezinhlelo zokusebenza. Izici zayo zokuncibilika ziyenza ihambisane nezinhlelo ezihlukahlukene zokuncibilikisa, okuvumela ukusetshenziswa kwayo ezimbonini ezihlukahlukene. Ukuqonda ukuziphatha kokuncibilika kwe-HPC kubalulekile ekwakheni imikhiqizo esebenza kahle kanye nokwenza kahle izimo zokucubungula. Ngokukhetha isincibilikisi esifanele nokucabangela izici ezifana ne-DS nesisindo samangqamuzana, abakhiqizi bangasebenzisa ngempumelelo i-HPC ukuze bathole ukusebenza komkhiqizo abakufunayo.
Isikhathi sokuthumela: Mar-26-2024