Iyiphi inqubo yokukhiqiza ye-hydroxyethyl cellulose?

IHydroxYethyl Cellulose (I-HEC) i-polymer esetshenziswa ngamanzi isetshenziswa kabanzi ekubambeni uwoyela, ukwakhiwa, ukumboza, ukupaka, izindwangu, izindwangu, izimbotshana kanye neminye imikhakha. Inqubo yayo yokukhiqiza ifaka ukuphendula okuyinkimbinkimbi kanye nokulawulwa kwenqubo eqinile.

(1) Ukulungiswa okungavuthiwe kwezinto ezibonakalayo

Izinto zokusetshenziswa eziphambili ze-hydroxyethyl cellulose zifaka:
I-Cellulose: Imvamisa kusetshenziswa ukotini okuhlanzeke kakhulu kwe-cellulose noma ipulpl polp pulp kusetshenziswa kahle ukususa ukungcola.
I-Ethylene oxide: Leli yi-ejenti ethe xaxa esetshenziselwa ukwethula amaqembu we-hydroxyethyl.
Isixazululo se-Alkali: Isixazululo se-Sodium Hydroxide Solution, esisetshenziselwa i-alkalization ye-cellulose.
I-Organic solvent: njenge-isopropanol, esetshenziselwa ukuncibilikisa iselula futhi igqugquzele ukusabela.

(2) Izinyathelo zenqubo

I-Alkalization of Cellulose:
Misa isembatho ku-organic solvent (efana ne-isopropanol) bese ufaka isixazululo se-sodium hydroxide se-alkalization.
Ekuphenduleni kwe-alkalization, ukwakheka kwe-hydrogen bond ye-cellulose kuphukile, okwenza amaqembu e-hydroxy ku-cellulose chain chain asabela kalula nge-oxide ye-ethylene
Ukusabela kwe-alkalization kuvame ukwenziwa emazingeni okushisa athile (njenge-50-70 ° C) futhi kwaqhubeka isikhathi eside ngaphansi kwemibandela evuthayo.
Ukuphendula okuthe xaxa:

Kancane kancane i-oxide inezelwe kancane kancane ohlelweni lwe-cellulose ye-alkalised.
I-Ethylene oxide iphendula ngamaqembu e-hydroxyl e-cellulose ukwakha i-hydroxyethyl cellulose.
Ukushisa okusheshayo kuvame ukuba phakathi kuka-50-100 ° C, futhi isikhathi sokuphendula siyahlukahluka ngokuya ngomkhiqizo oqondiwe.
Kulesi sigaba, izimo zokuphendula (ezinjengokushisa, isikhathi, inani le-ethylene oxide, njll.) Thola izinga lokufaka esikhundleni kanye ne-solubity ye-hydroxyethyl cellulose.
Ukungathathi hlangothi nokugeza:

Ngemuva kokuthi ukusabela sekuqediwe, i-acid (efana ne-hydrochloric acid) ingeziwe ekuhlaseleni isisombululo se-alkali ngokweqile, futhi umkhiqizo wokuphendula ugezwa uhlanzekile ukuze ususe amakhemikhali angabhalisiwe nemikhiqizo.
Ukugeza kuvame ukwenziwa ngokugeza amanzi, nangemva kokugeza okuningi, inani le-PH lomkhiqizo liseduze nokungathathi hlangothi.
Ukuhlunga nokomiswa:

I-hydroxyyethylyl egeziwe egeziwe idluliswa ngesihlungi ukuze isuse amanzi amaningi.
Umkhiqizo ohlungiwe womiswa, imvamisa ngokufafaza noma ukomisa umoya womoya, ukunciphisa okuqukethwe kwawo komswakama kuya okujwayelekile (okungaphansi kwama-5%).
Umkhiqizo omisiwe ukwi-powder noma ifomu le-granule enhle.
Ukuchoboza nokuhlola:

I-hydroxyyethyyl esomile ichotshozwa ukufeza usayizi wezinhlayiyana ezidingekayo.

Umkhiqizo ochotshoziwe uhlolwe ukuthola imikhiqizo yamasayizi ahlukene wezinhlayiya ukuze ahlangabezane nezidingo zezinkundla ezihlukile zohlelo lokusebenza.

Ukupakishwa nokugcinwa:

Umkhiqizo we-hydroxyethyl pultuleose ohlolwe ihlolwe ngokuya ngokucaciswa.

Izinto zokupakisha zivame ukuba yisikhwama sepulasitiki soMswakama kanye nesikhwama sePhepha

Gcina endaweni yokugcina epholile, eyomile, enomoya wokuvimbela umswakama noma ukuwohloka kokushisa.

(3) Ukulawulwa kwekhwalithi

Ukulawulwa kwekhwalithi kubalulekile kwinqubo yokukhiqiza ye-Hydroxyethyl cellulose. Kubandakanya ikakhulukazi izici ezilandelayo:

Ukulawulwa Kwekhwalithi Yezinto Ezisetshenziswayo: Qinisekisa ukuthi ukuhlanzeka kanye nekhwalithi ye-cellulose, i-ethylene oxide nezinye izinto ezisizayo zihlangabezana nezidingo.

Ukulawulwa kwe-Production Prance Control: Lawula ngokunembile amapharamitha wokhiye anjengokushisa, ingcindezi, isikhathi, ivelu ye-PH, njll. Ukuqinisekisa ikhwalithi yomkhiqizo ezinzile.

Ukuhlolwa komkhiqizo okuqediwe: Vivinya ngokumiswa okufakiwe, i-viscosity, i-solubity, ubumsulwa nezinye izinkomba zomkhiqizo wokugcina ukuze uqinisekise ukuthi ihlangabezana nezidingo zamakhasimende.

(4) Ukuvikelwa kwezemvelo nokuphepha
Ukukhiqizwa kweHydroxYethyl cellulose kubandakanya amakhemikhali anjenge-organic solvents ne-ethylene oxide. Ukuvikelwa okuhambisanayo kwemvelo ukuvikela kanye nezindlela zokuphepha kufanele kuthathwe ngesikhathi sokukhiqiza:

Ukwelashwa kwamanzi amdaka: Kukhiqizwe amanzi amdaka ngesikhathi senqubo yokukhiqiza kumele aphathwe ngaphambi kokukhipha ukugwema ukungcoliswa kwemvelo.

Ukwelashwa kwe-Waste gesi: I-Ethylene oxide inobuthi futhi evuthayo. Igesi yomsila wokuphendula idinga ukuphathwa ngemishini efana nemibhoshongo yokumunca ukunciphisa ukungcoliswa komoya.

Ukuvikelwa Kwezokuphepha: Abasebenzisi kudingeka bagqoke imishini yokuvikela ukugwema ukuxhumana namakhemikhali ayingozi. Ngasikhathi sinye, izikhungo zokukhiqiza kufanele zifakwe ukuvikela umlilo, ukuvimbela ukuqhuma kanye namanye amadivayisi wokuphepha.

Inqubo yokukhiqiza ye-Hydroxyyethyl celtulose ifaka phakathi ukusabela kwamakhemikhali okuyinkimbinkimbi kanye nokulawulwa kwenqubo okuyinkimbinkimbi. Ukusuka ekuhlelweni kwezinto ezingavuthiwe ukuze uqede ukupakishwa komkhiqizo, zonke izixhumanisi zinomthelela obalulekile ekusebenzeni nasezingeni lomkhiqizo wokugcina. Ngokuthuthuka kobuchwepheshe kanye nokwenza ngcono izidingo zokuvikelwa kwemvelo, inqubo yokukhiqiza ye-Hydroxyyethyl cellulose nayo iyalungiswa ukuthuthukisa ikhwalithi yomkhiqizo, ukunciphisa izindleko futhi kunciphise umthelela wezemvelo.