I-Carboxymethyl Cellulose:
InganikiI-Cellulose Etherkwenziwa kusuka kumicu yemvelo (ukotini, njll.) Ngemuva kokwelashwa kwe-alkali, kusetshenziswa i-sodium monochloroacet njenge-ejenti yokusheshisa, futhi kuthola uchungechunge lwezindlela zokwelashwa. Izinga lokufaka esikhundleni ngokuvamile lingu-0.4 ~ 1.4, futhi ukusebenza kwalo kuthinteka kakhulu ngezinga lokufaka esikhundleni.
(1) I-carboxymethyl celtulose iyinhlahla nge-hygroscopic eyengeziwe, futhi izoqukatha amanzi amaningi lapho igcinwe ngaphansi kwezimo ezijwayelekile.
. Lapho izinga lokushisa lidlula u-50 ° C, i-viscosity ayinakuphikwa.
(3) Ukuqina kwalo kuthinteka kakhulu ph. Ngokuvamile, ingasetshenziswa ku-gypsum osuselwa ku-gypsum, kepha hhayi ngodaka olususelwa kuso usimende. Lapho i-alkali kakhulu, izolahlekelwa ukubonana.
(4) Ukugcinwa kwayo kwamanzi kuncipha kakhulu kunalokho kwe-methyl cellulose. Inomphumela wokubuyisa emuva ku-gypsum osuselwa ku-gypsum futhi wehlise amandla ayo. Kodwa-ke, intengo ye-carboxymethyl celtulose iphansi kakhulu kunaleyo ye-methyl cellulose.
I-Cellulose Alkyl Ether:
Abamele yi-methyl cellulose ne-ethyl cellulose. Ekukhiqizweni kwezimboni, i-methyl chloride noma i-ethyl chloride ngokuvamile isetshenziswa njenge-ejenti yokusheshisa, futhi ukusabela kungokulandelayo:
Efomula, r imele i-CH3 noma i-C2H5. Ukuhlushwa kwe-Alkali akukubisi nje kuphela ngezinga lokuthethelwa, kepha futhi kuthinta ukusetshenziswa kwe-Alkyl Halides. Ukwehla okuhlushwa i-alkali, okunamandla kwe-hydrolysis ye-alkyl halide. Ukuze sinciphise ukusetshenziswa kwe-ejenti ethembisa, ukugxila kwe-alkali kumele kwendiswe. Kodwa-ke, lapho ukugxila kwe-alkali kuphezulu kakhulu, umphumela wokuvuvukala we-cellulose uncishisiwe, ongakuvumeli ukusabela kokuthezeka, futhi izinga lokuthezeka lincishisiwe. Ngale njongo, i-LYE egxilile noma i-SOOR SOOR SORE ingangezwa ngesikhathi sokuphendula. Umhlaziyi kufanele abe nedivaysi evuthayo evuthayo futhi edwengula ukuze i-alkali ingasatshalaliswa ngokulinganayo.
I-methyl cellulose isetshenziswa kabanzi njenge-sikhulu, inamathela futhi i-colloid ye-colloid ye-emulsion, i-slurry ye-emulsion, i-slurry yezimonyo, ukunamathela kwezidakamizwa, ukunamathela kwezidakamizwa Material, kanye nopende we-latex, i-inki yokuphrinta, ukukhiqizwa kwe-ceramic, futhi kuxutshwe usimende osetshenziselwa ukulawula isikhathi sokubeka futhi wandise amandla okuqala, njll.
Imikhiqizo ye-ELYL Cellulose inamandla aphezulu emishini, ukuguquguquka, ukumelana nokushisa nokuphikiswa okubandayo. Isembozo se-ethyl esisezingeni eliphansi sencibilika emanzini bese ligcwalisa izixazululo ze-alkali, futhi imikhiqizo efakwe esikhundleni esiphezulu iyancibilika kakhulu ku-organic solvents eziningi. Inokuhambisana okuhle nama-resin ahlukahlukene namapulasitiki. Ingasetshenziswa ukwenza amapulasitiki, amafilimu, ama-varnish, anamathela, izinto ze-latex ne-coating for izidakamizwa, njll.
Ukwethulwa kwamaqembu e-hydroxyalkyl ku-cellulose AlklLeters kungathuthukisa i-solubity yayo, kunciphise ukuzwela kwayo, ukukhulisa izinga lokushisa elishisayo futhi kuthuthukise izinga lokushintsha okushisayo, njll. Izinga lokushintshwa kwezindawo ezingenhla liyahlukahlukana kanye ne isilinganiso se-Alkyl kumaqembu we-hydroxyalkyl.
I-Cellulose Hydroxyalkyl ether:
Abamele yi-Hydroxyethyl cellulose kanye ne-hydroxypropyl cellulose. Ama-ejenti athembela ama-etherides anjenge-ethylene oxide ne-propelene oxide. Sebenzisa i-acid noma isisekelo njenge-catalyst. Ukukhiqizwa kwezimboni ukuphendula u-Alkali Cellulose nge-ejenti ye-etherification: Hydroxyethyl cellulose enenani eliphakeme kakhulu lincibilikayo kuwo wonke amanzi abandayo namanzi ashisayo. I-Hydroxypropyl celtulose enenani eliphakeme kakhulu linyibilika kuphela emanzini abandayo kodwa hhayi emanzini ashisayo. I-Hydroxyyethyl celtulose ingasetshenziswa njenge-nyouner ye-latex coatings, ukuphrinta kwendwangu kanye nama-pastes wokudaya, izinto zokufaka amaphepha, izinamathiseli nama-colloids avikelayo. Ukusetshenziswa kwe-Hydroxypropyllllls kufana naleso ye-hydroxyethyl cellulose. I-Hydroxypropyl celtulose enenani eliphansi lokufaka esikhundleni senani elingasetshenziswa njenge-excipietietical excipietical, ebingabambisane nokuhlukanisa izakhiwo.
I-Carboxymethylcelcelcellellulose, ifinyezwe njengeCm, ngokuvamile ikhona ngesimo sikasawoti we-sodium. I-ejenti yokuphenya i-monochlororoy acid, futhi ukusabela kungokulandelayo:
I-Carboxymethyl Cellulose iyi-ether esetshenziswa kakhulu ye-cellulose esetshenziswa kakhulu. Esikhathini esedlule, sasisetshenziswa kakhulu njengodaka oludonsayo, kepha manje selunwetshiwe ukuthi lusetshenziswe njengesengezo sokuhlanza, izingubo zokugqoka, upende we-latex, i-etc carboxboxylyl celtule Umuthi, izimonyo, kanye nokunamathela ku-ceramics kanye isikhunta.
I-Polyanionic Cellulose (PAC) i-IonicI-Cellulose EtherFuthi ingumkhiqizo osuselwa phezulu we-carboxymethyl cellulose (CMC). Kuyimpuphu emhlophe, emhlophe noma ephuzi kancane noma i-granule, engeyona into enobuthi, engenabutha, ingena kalula emanzini, inokuqina okungcono kokuqina kosawoti kanye nokuphikiswa usawoti, kanye nezakhiwo eziqinile ze-antibacterial. Akukho isikhutha nokuwohloka. Inezimpawu zobumsulwa obuphezulu, izinga eliphakeme lokufaka esikhundleni sokufakwa esikhundleni, kanye nokusatshalaliswa okufanayo kwabangeniswa esikhundleni. Ingasetshenziswa njenge-binder, isikhungo, ukuguqulwa kwe-Rheology, ukuncipha koketshezi, ukuncishiswa koketshezi, njll. Polyanionic cellulose (njll. I-Polyanionic Cellulose (i-Polyanionic Cellulose (PAC) isetshenziswa kabanzi kuyo yonke imithamo lapho i-CMC ingasetshenziswa khona, ihlinzeke kangcono ukuqina futhi uhlangabezane nezidingo zenqubo ephakeme.
I-Cyanoethyl celtulose ngumkhiqizo wokuphendula we-cellulose ne-acrylonitrile ngaphansi kwe-catalysis yase-Alkali:
I-Cyanoethyl celtulose inokulahleka okuphezulu okuhlala okuqhubekayo nokungaphansi kokulahlekelwa futhi kungasetshenziswa njenge-matrix ye-resin ye-phosphor kanye namalambu we-electrollominescent. I-cyanoethylls ephansi ephansi ye-cyanoethyl ingasetshenziswa njengephepha elifaka i-transformers.
Abanamafutha aphezulu abaphethe utshwala obunamafutha, u-Alkenyl Tabane, futhi abaphikisi botshwala obumnandi be-cellulose balungisiwe, kepha abasetshenziswanga ukuzilolonga.
Izindlela zokulungiselela ze-cellulose ether zingahlukaniswa ngendlela yamanzi aphakathi, indlela ye-solvent, indlela yokuxova, indlela enama-slurry, indlela eqinile yegesi, indlela yesigaba segesi kanye nenhlanganisela yezindlela ezingenhla.
Isikhathi Seposi: APR-28-2024