Yiziphi izindlela zokuqeda i-cellulose ether?

Ukuqothula izithako ze-cellulose kungaba isinyathelo esibalulekile ezimbonini ezahlukahlukene ezinjengemithi, ukudla, izindwangu kanye nokwakha.I-Cellulose Aferszisetshenziswa kabanzi ngenxa yezakhiwo zazo njengokuqina, ukubopha, ukwakha amafilimu, nokuzinza. Kodwa-ke, ukufakwa kwabo kokungafakwa emazweni amaningi ajwayelekile kungaba nezinselelo. Izindlela eziningana zithuthukisiwe ukuqeda i-cellulose izithathi ngempumelelo.

I-Organic Solcents:

Ama-Alcohols: Izimo zemvelo eziphansi ezifana ne-ethanol, i-methanol ne-isopropanol zingancibilikisa izithambiso ze-cellulose ngezinga elithile. Kodwa-ke, kungenzeka ukuthi azilungele zonke izinhlobo ze-cellulose afer futhi zingadinga amazinga okushisa aphakeme.
Ukuhlanganiswa kwe-Ether-Alcohol: Ukuhlanganiswa kwe-Diethyl Ether ne-Ethanol noma i-methanol kuvame ukusetshenziselwa ukuqeda izipho ze-cellulose. Lezi zinhlava zinikeza i-soubelity enhle futhi zivame ukusetshenziswa kuzilungiselelo zelebhu.
Ama-Ketones: Amanye ama-ketones afana ne-acetone ne-methyl ethyl ketone (mek) angancibilikisa izinhlobo ezithile ze-cellulose afes. I-Acetone, ikakhulukazi, isetshenziswa kabanzi ngenxa yezindleko zayo eziphansi kakhulu kanye nokusebenza kahle.
U-Ester: ama-esters anjengo-Ethyl Acetate kanye ne-Butyl Acetate angancibilikisa izitha ze-cellulose ephumelelayo. Kodwa-ke, bangadinga ukufudumala ukuze kufinyelelwe ngokuphelele.

Izisombululo zamanzi:

I-Alkaline Solutions: Abathengisi beCellulose bangachithwa kwizixazululo ze-Alkaline njenge-Sodium Hydroxide (NAOH) noma i-Potassium Hydroxide (Koh). Lezi zixazululo zenziwa nge-cellulose the atherles talts kusiza usawoti wensimbi we-alkali, oncibilikayo.
Izixazululo ze-Ammonia: Izixazululo ze-Ammonia (i-NH3) nazo zingasetshenziswa ukuncibilikisa izithambiso ze-cellulose ngokwakha usawoti we-ammonium we-ether.
I-Hydroxyalkyl Urea Solutions: I-Hydroxyalkyl Urea Solutions, njenge-Hydroxyethyl urea noma i-hydroxypropyl urea, ikakhulukazi i-cellulose afes, ikakhulukazi lezo ezinamazinga aphansi okufaka esikhundleni.

Ama-Ionic Liquid:

I-Ionic Liquid Ama-organic usawoti ongoketshezi owuketshezi emazingeni okushisa aphansi, imvamisa ngaphansi kuka-100 ° C. Amanye ama-ionic ketshezi atholakele ukuncibilikisa izibopho ze-cellulose kahle ngaphandle kwesidingo sezimo ezinzima. Banikela ngezinzuzo ezinjengokuqina okuphansi, ukuzinza okuphezulu okushisayo, nokubuyisela kabusha.

Izinhlelo ezixubile ze-solvent:

Ukuhlanganisa ama-solvents ahlukene ngezinye izikhathi kungakhulisa inhlangano ye-solubility ye-cellulose afes. Isibonelo, izingxube zamanzi nge-so-solvent efana ne-dimethyl sulfoxide (DMSO) noma i-N-methyl-2-pyrlolidone (NMP) ingathuthukisa izakhiwo zokuqeda.
Umqondo weHansen Solubility Prameters uvame ukuqashwa ukuklama amasistimu ahlanganisiwe we-solvent ahlanganisiwe wokuqedwa kwe-cellulose tarther ngokucabanga ngemingcele ye-solubity ye-solves yomuntu ngamunye kanye nokuxhumana kwawo.

Izindlela Zomzimba:

Ukugunda Kwemishini: Ukuxuba okuphezulu okuphezulu noma i-sonication kungasiza ekusakazeni izipho ze-cellulose e-sollents kanye nokwenza ngcono ama-kinetics okuchithwa.
Ukulawulwa kokushisa: amazinga okushisa aphakeme avame ukuthuthukisa insocility ye-cellulose afers kuma-solvents athile, kepha ukunakekelwa kumele kuthathwe ukugwema ukonakala kwe-polymer.

Ukuguqulwa kwamakhemikhali:

Kwezinye izimo, ukuguqulwa kwamakhemikhali ze-cellulose afers kungathuthukisa izakhiwo zabo ze-solubity. Isibonelo, ethula amaqembu ama-hydrophobic noma ukwandisa izinga lokufaka esikhundleni senza izithambiso ze-cellulose zincibilike kakhulu ezinhlafunweni ze-organic.

Izixazululo zeMicellar:

Ama-Surfactants angakha amaMicelles ngesixazululo, esingasongelaI-Cellulose Afers. Ngokulungisa ukugxilisa okuhlanyisayo kokuhlushwa kanye nezimo zokuxazulula, kungenzeka ukuqeda i-cellulose izithathi ngempumelelo.
Ekuphetheni, ukukhethwa kwendlela yokuqeda izitha izithandela kuya ngezinto ezifana nohlobo lwe-cellulose ether, ukucubungula okufunwayo, ukucubungula imvelo, kanye nesicelo esihlosiwe. Indlela ngayinye inezinzuzo nokulinganiselwa kwayo, futhi abaphenyi bayaqhubeka nokuhlola izindlela ezintsha zokuthuthukisa ukuchithwa kwezibopho ze-cellulose ezinhlamvwini ezahlukahlukene.