Ukuphuculwa kweHydroxyethyl cellulose

Ukuphuculwa kweI-Hydroxyethyl Cellulose(HEC) ibandakanya ukucubungula izinto eziluhlaza ukuphucula ubunyulu bazo, ukuhambelana kwazo, kunye neempawu zazo kwizicelo ezithile. Nantsi ingcaciso ebanzi yenkqubo yokuphucula iHEC:

1. Ukhetho lwezinto eziluhlaza:

Inkqubo yokucoca iqala ngokukhetha i-cellulose ekumgangatho ophezulu njengezinto eziluhlaza. I-Cellulose inokufumaneka kwimithombo eyahlukeneyo, njenge-pulp yomthi, ii-cotton linters, okanye ezinye izinto ezisekelwe kwizityalo.

2. Ukuhlanjululwa:

Izinto ze-cellulose eziluhlaza ziyahlanjululwa ukuze kususwe ukungcola okufana ne-lignin, i-hemicellulose, kunye nezinye izinto ezingezizo ze-cellulosic. Le nkqubo yokucoca idla ngokubandakanya ukuhlamba, ukublisha, kunye nonyango lweekhemikhali ukuphucula ubunyulu be-cellulose.

3. Ukufakelwa kwe-Ether:

Emva kokucocwa, i-cellulose iguqulwa ngokweekhemikhali ngokusebenzisa i-etherification ukuze kungeniswe amaqela e-hydroxyethyl kwi-cellulose backbone, nto leyo ebangela ukwakheka kwe-Hydroxyethyl Cellulose (HEC). Iimpendulo ze-etherification zihlala ziquka ukusetyenziswa kwe-alkali metal hydroxides kunye ne-ethylene oxide okanye i-ethylene chlorohydrin.

4. Ukungathathi cala kunye nokuHlamba:

Emva kokufakelwa kwe-ether, umxube we-reaction uyasuswa ukuze kususwe i-alkali egqithisileyo kwaye kulungiswe i-pH. Imveliso esusiweyo iyahlanjwa kakuhle ukuze kususwe iikhemikhali eziseleyo kunye neemveliso eziphuma kwi-reaction.

5. Ukucoca kunye nokomisa:

Isisombululo se-HEC esicociweyo siyahluzwa ukuze kususwe naziphi na iinxalenye eziqinileyo okanye ukungcola okuseleyo. Emva kokuhluzwa, isisombululo se-HEC sinokuxutywa, ukuba kuyimfuneko, size somiswe ukuze kufunyanwe uhlobo lokugqibela lwe-HEC oluyimpuphu okanye oluyi-granular.

6. Ulawulo loMgangatho:

Kuyo yonke inkqubo yokucoca, amanyathelo okulawula umgangatho ayasetyenziswa ukuqinisekisa ukuhambelana, ubunyulu, kunye nokusebenza kwemveliso ye-HEC. Uvavanyo lokulawula umgangatho lungabandakanya ukulinganiswa kwe-viscosity, uhlalutyo lobunzima be-molecular, ukuqinisekiswa komxholo womswakama, kunye nolunye uhlalutyo lwe-physical kunye ne-chemical.

7. Ukupakishwa kunye nokugcinwa:

Nje ukuba icocekile, imveliso ye-HEC ipakishwa kwizikhongozeli okanye kwiingxowa ezifanelekileyo zokugcina nokuthuthwa. Ukupakishwa okufanelekileyo kunceda ukukhusela i-HEC ekungcoleni, ekufumeni, nakwezinye izinto ezingqongileyo ezinokuchaphazela umgangatho wayo.

Izicelo:

I-Refined Hydroxyethyl Cellulose (HEC) ifumana izicelo ezininzi kumashishini ahlukeneyo, kuquka:

• Ulwakhiwo: Isetyenziswa njengesithambisi-manzi, isilungisi se-rheology, kunye nearhente yokugcina amanzi kwiimveliso ezisekwe kwisamente, iipeyinti, iingubo, kunye nezincamathelisi.
• Ukhathalelo Lobuqu kunye Nezinto Zokuthambisa: Zisetyenziswa njengesithambisi, isizinzisi, kunye nefilimu eyenziwe kwiiloshini, iikhrimu, iishampu, kunye nezinye iimveliso zokhathalelo lobuqu.
• Amayeza: Asetyenziswa njengesixhobo sokubopha, ukususa, kunye ne-arhente yokukhulula elawulwayo kwiipilisi zamayeza, iikhaphu, kunye ne-suspensions zomlomo.
• Ukutya: Isetyenziswa njengesithambisi-mveliso, isithambisi-mveliso, kunye nesiqinisi kwimveliso yokutya efana neesosi, iidiresi, kunye neemveliso zobisi.

Isiphelo:

Ukuhlaziywa kweHydroxyethyl Cellulose (HEC) kubandakanya amanyathelo aliqela okucoca nokuguqula izinto ze-cellulose eluhlaza, nto leyo ephumela kwi-polymer esebenza ngeendlela ezahlukeneyo nesebenza kakuhle enezicelo ezininzi kumashishini afana nokwakha, ukhathalelo lomntu, amayeza, kunye nokutya. Inkqubo yokucoca iqinisekisa ukuhambelana, ubunyulu, kunye nomgangatho wemveliso ye-HEC, nto leyo evumela ukusetyenziswa kwayo kwiifomyula ezahlukeneyo kunye neemveliso.