I-Solubility kanye ne-viscosity ye-HEC cellulose emigqumeni esekelwe emanzini

Abstract:

Eminyakeni yamuva nje, izimbotshana ezisekelwe emanzini zithole ukunakwa okusabalele ngenxa yobungane bazo bemvelo kanye nokuqukethwe okuphansi kwe-volatile organic compound (VOC).IHydroxyethylcellulose (HEC) iyi-polymer encibilika emanzini esetshenziswa kabanzi kulezi zakhiwo, esebenza njenge-thickener yokwandisa i-viscosity nokulawula i-rheology.

ethula:

1.1 Isendlalelo:

Izembatho ezisekelwe emanzini seziphenduke enye indlela evumelana nemvelo kunezinye zendabuko ezisekelwe ku-solvent, ixazulula izinkinga ezihlobene nokukhishwa kwe-organic compound eguquguqukayo kanye nomthelela wemvelo.I-Hydroxyethylcellulose (HEC) iphuma ku-cellulose eyisithako esiyinhloko ekwakhiweni kwezingubo ezisekelwe emanzini futhi inikeza ukulawula nokuzinza kwe-rheology.

1.2 Izinjongo:

Lesi sihloko sihlose ukucacisa izici ze-HEC zokuncibilika emanzini asekelwe emanzini kanye nokutadisha umthelela wezinto ezihlukahlukene ku-viscosity yayo.Ukuqonda lezi zici kubalulekile ekuthuthukiseni ukwakheka kwe-coating kanye nokuzuza ukusebenza okufunayo.

I-Hydroxyethylcellulose (HEC):

2.1 Isakhiwo nokusebenza:

I-HEC iphuma ku-cellulose etholakala ngokusabela kwe-etherification ye-cellulose ne-ethylene oxide.Ukwethulwa kwamaqembu e-hydroxyethyl kumgogodla we-cellulose kunomthelela ekuncibilikeni kwawo kwamanzi futhi kuwenza i-polymer ebalulekile ezinhlelweni ezisekelwe emanzini.Isakhiwo samangqamuzana kanye nezakhiwo ze-HEC kuzoxoxwa ngakho ngokuningiliziwe.

Ukuncibilika kwe-HEC emanzini:

3.1 Izinto ezithinta ukunyibilika:

I-solubility ye-HEC emanzini ithintwa izici eziningana, okuhlanganisa izinga lokushisa, i-pH, nokugxila.Lezi zici kanye nomthelela wazo ekuncibilikeni kwe-HEC kuzoxoxwa ngazo, kunikeze ukuqonda ngezimo ezivumela ukuchithwa kwe-HEC.

3.2 Umkhawulo wokuncibilika:

Ukuqonda imikhawulo ye-solubility ephezulu nephansi ye-HEC emanzini kubalulekile ekwakheni ama-coatings ngokusebenza kahle.Lesi sigaba sizocubungula ibanga lokugxila lapho i-HEC ikhombisa ukuncibilika okuphezulu kanye nemiphumela yokweqa le mikhawulo.

Thuthukisa i-viscosity nge-HEC:

4.1 Iqhaza le-HEC ku-viscosity:

I-HEC isetshenziswa njenge-thickener emigqeni esekelwe emanzini ukusiza ukwandisa i-viscosity nokuthuthukisa ukuziphatha kwe-rheological.Izinqubo lapho i-HEC ifinyelela khona ukulawulwa kwe-viscosity izocutshungulwa, igcizelele ukusebenzisana kwayo nama-molecule wamanzi nezinye izithako ekwakhiweni kwe-coating.

4.2 Umthelela wefomula eguquguqukayo ku-viscosity:

Ukuguquguquka okuhlukahlukene kokubunjwa, okuhlanganisa ukugxila kwe-HEC, izinga lokushisa, nezinga le-shear, kungathinta kakhulu i-viscosity yezingubo eziphuma emanzini.Lesi sigaba sizohlaziya umthelela walokhu okuguquguqukayo ku-viscosity ye-HEC-containing coatings ukuze kuhlinzekwe ngemininingwane esebenzayo kubadidiyeli.

Izicelo namathemba esikhathi esizayo:

5.1 Izicelo zezimboni:

I-HEC isetshenziswa kabanzi ezinhlelweni ezahlukahlukene zezimboni ezinjengamapende, izinto zokunamathisela nama-sealants.Lesi sigaba sizogqamisa iminikelo ethile ye-HEC ekuhlanganisweni kwamanzi kulezi zinhlelo zokusebenza futhi sixoxe ngezinzuzo zayo ngaphezu kokunye ukujiya.

5.2 Izikhombisi-ndlela zocwaningo lwangomuso:

Njengoba isidingo sokunamathela esimeme nesisebenza kahle sikhula, izikhombisi-ndlela zocwaningo lwesikhathi esizayo emkhakheni wokwakheka okusekelwe ku-HEC zizocutshungulwa.Lokhu kungase kuhlanganise izinto ezintsha ekuguqulweni kwe-HEC, amasu okuqamba amanoveli, nezindlela zokulinganisa ezithuthukisiwe.

Ekuphetheni:

Ukufingqa okutholakele okuyinhloko, lesi sigaba sizogqamisa ukubaluleka kokulawulwa kwe-solubility kanye ne-viscosity ezimbotsheni zamanzi kusetshenziswa i-HEC.Lesi sihloko sizophetha ngemithelela esebenzayo kubaqulunqi nezincomo zocwaningo olwengeziwe ukuze kuthuthukiswe ukuqonda kwe-HEC kumasistimu ahamba emanzini.