Yi-hydroxyyethylcellulose evuthayo

IHydroxyYethylcellulose (HEC) yi-nonic, i-polymer ene-soluble ancibilike ethathwe ku-cellulose. Isetshenziswa kakhulu kwizimboni ezahlukahlukene ezinjengemithi, izimonyo, ukudla, nemikhiqizo yokunakekelwa komuntu siqu ngenxa yokuqina kwayo, ukuzinza, kanye nezakhiwo ze-gelling.

Ukwakheka kwamakhemikhali kweHydroxYethylcelcellellulose

I-HEC iyinhlangano eguquliwe ye-cellulose polymer, lapho kwangeniswa khona amaqembu e-Hydroxyethyl. Lokhu kuguqulwa kuthuthukisa i-solubility yamanzi nezinye izakhiwo zeselula. Amaqembu we-Hydroxyethyl (-ch2chch2oh) ahlanganiswe ngamaqembu ama-hydroxyl (-oh) amaqembu e-molecule ye-cellulose. Lokhu kuguqulwa kuguqula izakhiwo zomzimba nezamakhemikhali ze-cellulose, okwenza kube lula ukuthola izicelo eziningi.

Izici Zokuvutha

1. Ukuhlaziywa

I-cellulose emsulwa iyinto evuthayo ngoba iqukethe amaqembu we-hydroxyl, angabhekana nokuhlanganiswa. Kodwa-ke, ukwethulwa kwamaqembu we-hydroxyethyl ku-cellulose backbone kuguqula izici zayo zokuvutha. Ukuba khona kwamaqembu e-hydroxyethyl kungathinta ukusebenza kwe-hec kuqhathaniswa ne-cellulose engafakwanga.

2. Ukuhlolwa kwezivuseleli

Ukuhlolwa kwamafutha kubalulekile ukuthola izingozi zomlilo ezihambisana nezinto ezibonakalayo. Ukuhlolwa okujwayelekile okujwayelekile, njenge-ASTM E84 (Indlela ejwayelekile yokuhlola yezimpawu zokuvutha komhlaba zezinto zokwakha) kanye ne-ul 94 (indinganiso yokuphepha yokuvuselelwa kwezinto zokwakha izingxenye namathuluzi), kusetshenziselwa ukuhlola ukuvuthwa kwezinto zokwakha. Lezi zivivinyo zihlola amapharamitha afana nokusakazeka kwamalangabi, ukuthuthukiswa kwentuthu, kanye nezimpawu zokulahla.

Izici ezithinta ukuvutha

1. Okuqukethwe umswakama

Ukuba khona komswakama kungathonya ukuthambekela kwezinto zokwakha. Izinto ze-cellulosic zivame ukungavuleki kancane uma ziqukethe amazinga aphezulu omswakama ngenxa yokufakwa kokushisa kanye nomphumela wamanzi opholile. IHydroxYethylcelcellellulose, ukuba manzi-seluble, kungaqukatha umswakama ohlukahlukene ngokuya ngezimo zemvelo.

2. Ubukhulu bezinhlayiyana nobukhulu

Ubukhulu bezinhlayiyana nobuningi bezinto ezibonakalayo bungakuthinta ukuvutha kwaso. Izinto zokwehlukaniswa kahle ngokuvamile zinendawo ephakeme ephezulu, ethuthukisa ukuhlanganiswa ngokushesha. Kodwa-ke, i-HEC imvamisa isetshenziswa efomini eliyimpuphu noma eligayiwe ngosayizi wezinhlayiyana ezilawulwayo ukufeza izidingo ezithile zohlelo lokusebenza.

3. Ukuba khona kwezithasiselo

Kuhlelo lokusebenza olusebenzayo, ukwakheka kwe-hydroxyyethylcellose kungaqukatha izengezo ezinjengamapulasitiki, ukuqina, noma amalangabi amalangabi. Lezi zengezo zingaguqula izici ezivuthayo zemikhiqizo esekwe ku-HEC. Isibonelo, amalangabi amalangabi angacindezela noma anciphise ukuxabana futhi asakaze amalangabi.

Izingozi zomlilo nokucatshangelwa kokuphepha

1. Isitoreji nokuphatha

Izitoreji ezifanele zokugcina nokuphatha zibalulekile ukunciphisa ubungozi bezigameko zomlilo. I-HydroxyYethylcellose kufanele igcinwe endaweni eyomile, enomoya omuhle kude nemithombo engaba khona. Ukunakekelwa kufanele kuthathwe ukuvikela ukuvezwa kokushisa ngokweqile noma ukukhanya kwelanga okuqondile, okungaholela ekuboleni noma ekulahleni.

2. Ukulandela umthetho wokulawula

Abakhiqizi kanye nabasebenzisi be-Hydroxyyethylcelcelcellose-equkethe imikhiqizo kufanele bahambisane nemithetho kanye namazinga afanele. Imizimba elungiselelwe efana ne-Eccupational Thekfork Enclusiest and Health Administration (OSHA) e-United States kanye ne-European Chemicals Agency (ECHA) e-European Union inikezela ngemihlahlandlela yokuphatha okuphephile nokusetshenziswa kwamakhemikhali.

3. Izinyathelo zokucindezela umlilo

Uma kwenzeka umlilo obandakanya ama-hydroxyyethylcelcellellose noma imikhiqizo equkethe i-HEC, kufanele kusetshenziswe izinyathelo ezifanele zokucindezela umlilo. Lokhu kungafaka ukusebenzisa amanzi, i-carbon dioxide, izicishani zomile zamakhemikhali, noma igwebu, kuya ngohlobo lomlilo kanye nendawo ezungezile.

I-HydroxyEthylcellose iyinhlangano eguqulwe i-cellulose polymer esetshenziswa kakhulu kwizimboni ezahlukahlukene zezakhiwo zayo zokuqina nokuzinza. Ngenkathi iselula emsulwa evuthayo, ukwethulwa kwamaqembu ama-hydroxyethyl kuguqula izici ezivuthayo ze-HEC. Izici ezinjengokuqukethwe komswakama, usayizi wezinhlayiyana, ubungako, kanye nokuba khona kwezengezo kungathonya ukufudumala kwemikhiqizo equkethe ama-hydroxyyethylcelcelcelcelcelcelcelcelcelcelcelcelcelcelcelcelulose. Isitoreji esifanele, ukuphatha, nokubambelela emithethweni yokuphepha kubalulekile ukuze unciphise izingozi zomlilo ezihambisana ne-HEC. Ukucwaninga okwengeziwe nokuhlolwa kungenzeka kudingekile ukuqonda ngokugcwele indlela yokuziphatha evuthayo ye-hydroxyyethylcellulose ngaphansi kwezimo ezahlukahlukene nokwakheka.


Isikhathi Sokuthumela: APR-09-2024