Ama-ether e-cellulose

Ama-ether e-celluloseziyisigaba samakhemikhali e-polymer ancibilika emanzini atholakala ngokuguqulwa kwe-etherification kwe-cellulose yemvelo. I-Cellulose iyi-polymer yemvelo eningi kakhulu emhlabeni futhi itholakala kabanzi ezindongeni zamaseli ezitshalo. Isakhiwo sayo esiyisisekelo sakhiwe ngamayunithi e-glucose axhunywe yizibopho ze-β-1,4-glycosidic. Njengoba i-cellulose yemvelo ingancibiliki emanzini kanye nasezithambisweni eziningi zezinto eziphilayo, ukusetshenziswa kwayo okuqondile kunqunyelwe. Ukuze kwandiswe ukusebenza kwayo kanye nokusetshenziswa kwayo, abantu bethula amaqembu aphilizayo noma angenamanzi ngokusebenzisa ukuguqulwa kwamakhemikhali njengokusabela kwe-etherification ukuthola ama-derivatives e-cellulose. Phakathi kwawo, ama-ether e-cellulose asetshenziswa kabanzi ekwakheni, kwezokwelapha, ekudleni, ezimonyweni, ekubholeni uwoyela nakwezinye izindawo ngenxa yokuncibilika kwawo okuhle kwamanzi, izakhiwo zokwakha ifilimu, ukunamathela, ukuhambisana kwezinto eziphilayo kanye nezinye izakhiwo.

1. Izinhlobo ze-cellulose ethers

Kuye ngohlobo lweqembu le-ether elethulwayo, ama-ether e-cellulose afaka phakathi izinhlobo ezilandelayo:

1.1I-Methyl cellulose (MC):Yi-cellulose ether yokuqala ethengiswayo enezakhiwo ezinhle zokwakha ifilimu kanye nokunamathela. Ivame ukusetshenziswa ekumbozeni, ekunamathiseni, njll.

1.2I-Hydroxypropyl methylcellulose (HPMC):Yenziwa ngokwethula amaqembu e-hydroxypropyl kanye ne-methyl. Ine-gelation engcono yokushisa kanye nokuncibilika. Iyingxenye ebalulekile yengubo yamaphilisi emithi kanye nezinto ezikhishwa njalo.

1.3I-Hydroxyethyl cellulose (HEC):Ukwethulwa kwamaqembu e-hydroxyethyl kuthuthukisa ukuncibilika kanye nokuqina. Kusetshenziswa kabanzi kupende we-latex, imikhiqizo yamakhemikhali yansuku zonke, njll.

1.4I-Sodium carboxymethyl cellulose (CMC-Na):Ngemva kokwethulwa kwamaqembu e-carboxymethyl, i-cellulose iba yi-anionic futhi ingasetshenziswa njengesithako sokudla, ukwenza iphepha, kanye nokubhoboza uwoyela.

1.5I-Methyl hydroxyethyl cellulose (MHEC):Ihlanganisa izici zamaqembu e-methyl kanye ne-hydroxyethyl futhi isebenza kahle ekwakheni. Ivame ukusetshenziswa ezintweni zokwakha zempuphu eyomile njengempuphu yokwakha i-putty kanye ne-tile adhesive.

2. Inqubo yokulungiselela

Ukulungiswa kwe-cellulose fiber ether ngokuvamile kuhlanganisa izinyathelo ezimbili: i-alkaliization kanye ne-etherification. Okokuqala, i-cellulose yemvelo iphathwa nge-sodium hydroxide ukuze yakhe i-alkali cellulose, bese isabela nge-etherifying agent efanele (njenge-methyl chloride, i-propylene oxide, i-chloroacetic acid, njll.) ukuze kukhiqizwe i-cellulose ether ehambisanayo. Izimo zokusabela (njengokushisa, inani le-pH, isikhathi, njll.) kanye nohlobo kanye nenani le-etherifying agent kunquma izinga lokushintshaniswa (DS) kanye nokusatshalaliswa komkhiqizo wokugcina, ngaleyo ndlela kuthinte ukusebenza kwawo.

3. Izici zokusebenza

Ama-ether e-cellulose anezakhiwo ezibalulekile ezilandelayo:

3.1Ukuncibilika kwamanzi kanye nokujiya kwawo:Ama-ether amaningi e-cellulose ayancibilika emanzini abandayo ukuze akhe izixazululo ezibonakalayo eziqinile, futhi ayizinto eziqinisa kakhulu.

Impahla yokwakha ifilimu: Ingakha amafilimu asobala futhi aguquguqukayo ezindaweni ezahlukahlukene futhi isetshenziswa kabanzi ekumbozeni nasekumbozeni izidakamizwa.

3.2Ukunamathela:Njengesinamathelisi, ingathuthukisa amandla okubopha phakathi kwezinto.

3.3Ukugcinwa kwamanzi:Kungathuthukisa kakhulu ukugcinwa kwamanzi kanye nokusebenza kokwakhiwa kwezinhlelo ezifana nodaka lukasimende kanye ne-gypsum.

3.4Ukufakwa kwe-thermal gelation:Amanye ama-ether e-cellulose (njenge-HPMC) akha ama-gel ngesikhathi sokushisa, okusiza ukulawula ukukhishwa kwemithi.

3.5Ukuhambisana kwezinto eziphilayo kanye nokuwohloka kwazo:Ayinabo ubuthi, ayicasuli, futhi iyabola kancane, ifanelekela imikhakha yezokwelapha nokudla.

4. Izinkambu zohlelo lokusebenza

4.1Imboni yokwakha

Ku-dry-mix mortar, i-tile adhesive, i-putty powder, iphansi elizilinganisayo nezinye izinto, i-cellulose ether isetshenziswa kakhulu njenge-thickener, i-water retainer kanye ne-construction improve. Ingathuthukisa ukusebenza kahle kokwakha, inciphise ukuqhekeka futhi ithuthukise amandla.

4.2Imboni yezemithi

I-HPMC kanye ne-CMC-Na, njengoba zisetshenziswa njenge-glue, i-carrier ekhululayo njalo kanye nezinto zokumboza amaphilisi, zivame kakhulu. Zingalawula izinga lokukhishwa kwemithi futhi zithuthukise ukuzinza kwemithi.

4.3Imboni yokudla

I-CMC-Na isetshenziswa njengesiqinisi, i-emulsifier kanye nesiqinisi ekudleni, njenge-ayisikhilimu, i-jelly, izinongo, njll., enomphumela omuhle wokuthuthukisa ukunambitheka.

4.4Imikhiqizo yamakhemikhali yansuku zonke

Isetshenziswa ku-toothpaste, i-shampoo, i-facial cleanser kanye neminye imikhiqizo, idlala indima yokuqinisa, ukuthambisa, ukuhlanganisa kanye nokuzinzisa, ikakhulukazi i-HEC kanye ne-HPMC kusetshenziswa kakhulu.

4.5Ukukhishwa kwamafutha

Njengomlawuli we-rheology kanye ne-ejenti yokulawula ukuhlunga kuketshezi lokubhoboza, kuthuthukisa ukusebenza kahle kokubhoboza futhi kunciphisa umthelela emvelweni.

5. Izitayela Zentuthuko

Ngokukhuthazwa kwemibono yokuvikela imvelo eluhlaza kanye nesidingo esikhulayo sezinto zokusebenza okuphezulu, ukuthuthukiswa kwama-cellulose ethers kukhombisa ukuthambekela okulandelayo:

Ukusebenza kahle kanye nokusebenza okuphezulu: Thuthukisa ukumelana nokushisa, ukumelana nosawoti, ukukhululwa okulawulwayo kanye nezinye izakhiwo ngokuguqulwa kwe-copolymerization, ukuguqulwa kokuxhumanisa kanye nezinye izindlela.

Inhlanganisela ye-nanotechnology: Hlanganisa nezinto ze-nanomaterial ukuze wakhe izinto ezihlanganisiwe ukuze uthuthukise ukusebenza kwayo emikhakheni yokusetshenziswa ephezulu.

Isiqondiso sezokwelapha: Thuthukisa ama-derivatives e-cellulose ether aqondiswe kakhulu futhi ahambisana ne-bio ukuze kuthuthukiswe izicubu, kukhishwe umuthi oqondiswe, njll.

Inqubo yokukhiqiza eluhlaza: Sebenzisa izindlela zokwenziwa ezingenaso isinyibilikisi, ezisebenzisa amandla amancane kanye nezindlela zokwenziwa ezinobungani nemvelo ukuze unciphise umthelela emvelweni.

Njenge-derivative ebalulekile ye-polymer yemvelo,i-cellulose etherisibe yinto ebalulekile ewusizo emikhiqizweni yesimanje yezimboni kanye neyomphakathi ngokusebenza kwayo okuhle kakhulu kanye namathuba amaningi okusetshenziswa. Esikhathini esizayo, ngokuthuthukiswa kwesayensi yezinto zokwakha kanye nokuthuthukiswa kwezidingo zokuvikela imvelo eluhlaza, ubuchwepheshe bokulungiselela kanye nezinkambu zokusetshenziswa kwama-cellulose ethers kuzoqhubeka nokukhula, futhi amandla ayo ezintweni zokwakha ezisebenza kahle kakhulu, i-biomedicine, izinto ezihlakaniphile, njll. nazo zizohlolwa kancane kancane.