Ukukhiqiza i-Hydroxyethyl celtulose (HEC) kubandakanya uchungechunge lokuphendula kwamakhemikhali ukuguqula iselula, i-polymer yemvelo ethathwe ezitshalweni. I-HEC isetshenziswa kabanzi emikhakheni ehlukahlukene, kufaka phakathi amakhambi, izimonyo, ukudla kanye nokwakha, ngenxa yokuqina kwayo, ukuzinza, kanye nezindawo zokugcina amanzi.
Isingeniso seHydroxYethyl Cellulose (HEC)
I-Hydroxyyethyl cellulose (HEC) yi-nonic, i-polymer esolulekayo yamanzi etholakala ku-cellulose ngokuguqulwa kwamakhemikhali. Kusetshenziswa kabanzi njenge-gelling, gelling, kanye nokuzinza kwe-ejenti ezimbonini ezahlukahlukene.
Ama-Raw material
I-Cellulose: Izinto eziphambili ezivuthiwe zokukhiqizwa kwe-HEC. I-cellulose ingatholwa kusuka ezintweni ezahlukahlukene ezisekelwe kwezitshalo ezinjenge-solip pulp, ukotini, noma izinsalela zezolimo.
I-Ethylene oxide (EO): Ikhemikhali eliyisihluthulelo elisetshenziselwa ukwethula amaqembu we-hydroxyethyl emgogodleni we-cellulose.
I-Alkali: Ngokuvamile i-sodium hydroxide (NAOH) noma i-potassium hydroxide (Koh) isetshenziswa njenge-catalyst ekuphenduleni.
Inqubo Yokukhiqiza
Ukukhiqizwa kukaHec kufaka phakathi ukushefa kwe-cellulose nge-ethylene oxide ngaphansi kwezimo ze-alkaline.
Izinyathelo ezilandelayo zichaza inqubo:
1. Ukwelashwa kwangaphambili kwe-cellulose
I-cellulose ihlanjululwa okokuqala ukususa ukungcola okufana ne-lignin, i-hemishellulose, kanye nokunye okukhishwe. Isembozo esihlanjululwe bese somiswa kokuqukethwe komswakama okuthile.
2. Ukuphendula okuthe xaxa
Ukulungiselela isisombululo se-alkaline: isisombululo esinamanzi se-sodium hydroxide (NAOH) noma i-potassium hydroxide (Koh) iyalungiswa. Ukuhlushwa kwesixazululo se-Alkali kubalulekile futhi kudinga ukulungiswa ngokususelwa ezingeni elifunekayo lokufakwa esikhundleni (DS) lomkhiqizo wokugcina.
Ukusetha Ukuphendula: I-cellulose ehlanziwe ihlakazeka kusisombululo se-alkali. Ingxube ifudunyezwa emazingeni okushisa athile, ngokuvamile azungeze ama-50-70 ° C, ukuqinisekisa ukuthi i-cellulose ivuvukala ngokuphelele futhi iyatholakala ngokusabela.
Ukungezwa kwe-oxide (EO): I-Ethylene Oxide (EO) ingezwe kancane emgodini wokuphendula ngenkathi igcina izinga lokushisa livuselelwa ngokuqhubekayo. Ukuphendula kungukuphakamisa, ngakho-ke ukulawulwa kokushisa kubalulekile ukuvikela ukushisa ngokweqile.
Ukuqapha ukuphendula: Ukuthuthuka kokuphendula kubhekwa ngokuhlaziya amasampula ngezikhathi ezithile. Amasu anjenge-infyroscopy eguqukayo e-Fineer-Transform (FTIR) angasetshenziswa ukuthola izinga lokufakwa esikhundleni (DS) lamaqembu we-hydroxyethyl e-cellulose backbone.
Ukungathathi hlangothi nokugeza: Uma i-DS efiselekayo itholakele, ukusabela kucishwa ngokuvikelwa amandla okuhlanza isisombululo se-alkaline nge-acid, ngokuvamile acid. I-hec ephumayo igezwa kahle ngamanzi ukususa noma yiziphi izimpendulo ezingezona ezingezinhle nokungcola.
3. Ukuhlanzwa nokomisa
I-hec egeziwe yahlanzwa ngokuhlunga noma nge-centrifugation ukususa noma yikuphi ukungcola okusele. I-HEC ehlanziwe iyomiswa kokuqukethwe okuthize umswakama ukuthola umkhiqizo wokugcina.
Ikhwalithi yokulawula
Ukulawulwa kwekhwalithi kubalulekile kuyo yonke inqubo yokukhiqiza ye-HEC ukuqinisekisa ukuvumelana nobumsulwa bomkhiqizo wokugcina. Amapharamitha asemqoka ukuqapha afaka:
Degree of inhlanganisela (DS)
Ukuhlakanipha
Okuqukethwe umswakama
pH
Ubumsulwa (ukungabikho kokungcola)
Amasu wokuhlaziya afana ne-FTIR, izilinganiso zokubonana, kanye nokuhlaziywa kokuqala kuvame ukusetshenziselwa ukulawulwa kwekhwalithi.
Izicelo ze-hydroxyethyl celtulose (HEC)
I-HEC ithola izinhlelo zokusebenza ezimbonini ezahlukahlukene ngenxa yezakhiwo zayo eziguquguqukayo:
Izemithi: Isetshenziswa njenge-ejenti ekhulayo ekumisweni kokumiswa komlomo, ukwakheka kwezidakamizwa, nezinhlelo zokukhishwa kwezidakamizwa ezilawulwayo.
I-COSMETICS: Isetshenziswa kakhulu kumakhilimu, ama-lotions kanye nama-shampoos njengomuntu omkhulu ne-stabilizer.
Ukudla: Kungezwe kwimikhiqizo yokudla njenge-ejenti yokuqina kanye ne-emulsifier, ne-stabilizer.
Ukwakhiwa: Kusetshenziswe odongeni osuselwa kukhonkolo kanye nama-grouts ukwenza ngcono ukusebenza nokugcinwa kwamanzi.
Ukucatshangelwa Kwezemvelo Nezokuphepha
Umthelela Wezemvelo: Ukukhiqizwa kukaHec kufaka phakathi ukusetshenziswa kwamakhemikhali anjenge-ethylene oxide ne-alkalis, engaba nemithelela yemvelo. Ukuphathwa kwemfucumfucu kanye nokubambelela emithethweni kubalulekile ukuze unciphise umthelela wezemvelo.
Ezokuphepha: I-Ethylene Oxide iyigesi esebenza kahle futhi evuthayo, ebeka izingozi zokuphepha ngesikhathi sokuphatha nokugcina. Umoya omncane womoya owanele, imishini yokuzivikela (i-PPE), nezinqubomgomo zokuphepha ziyadingeka ukuqinisekisa ukuphepha kwabasebenzi.
IHydroxYethyl Cellulose (HEC) iyi-polymer ebalulekile enezicelo ezahlukahlukene ezimbonini ezisukela emikhakheni ekwakheni. Ukukhiqizwa kwalo kufaka phakathi ukusheshisa kwe-cellulose nge-ethylene oxide ngaphansi kwezimo ze-alkaline. Izindlela zokulawula ezisezingeni elibalulekile ukuqinisekisa ukuvumelana nobumsulwa bomkhiqizo wokugcina. Ukucatshangelwa kwemvelo nokuphepha kufanele futhi kubhekwane nakho kuyo yonke inqubo yokukhiqiza. Ngokulandela izinqubo ezifanele nezinqubomgomo ezifanele, i-HEC ingakhiqizwa kahle ngenkathi inciphisa umthelela wezemvelo kanye nokuqinisekisa ukuphepha kwabasebenzi.
Le ncwadi ephelele ihlanganisa inqubo yokukhiqiza ye-Hydroxyyethyl celtulose (HEC) ngokuningiliziwe, kusuka ezintweni ezingavuthiwe kuya kokulawulwa kwekhwalithi kanye nezinhlelo zokusebenza, ukuhlinzeka ngokuqonda kahle kwale nqubo ebalulekile ye-polymer
Isikhathi sePosi: Apr-10-2024