I-modified cellulose ethers iyiqembu elihlukahlukene lenhlanganisela yamakhemikhali etholakala ku-cellulose, i-polymer yemvelo etholakala ezindongeni zamaseli ezitshalo. I-Cellulose iyiketango le-polymer elakhiwe ngamayunithi eglucose axhunywe ndawonye ngamabhondi e-β-1,4-glycosidic. Iyipolymer yemvelo eningi kakhulu eMhlabeni futhi inezinto eziningi eziwusizo njengamandla aphezulu, ukuminyana okuphansi, ukubola kwe-biodegradability, kanye nokwenza kabusha.
Ama-cellulose ethers aguquliwe akhiwa ngokwethula amaqembu amakhemikhali ahlukahlukene ku-molecule ye-cellulose, eshintsha izici zayo ezingokomzimba namakhemikhali. Lokhu kuguqulwa kungafezwa ngezindlela ezimbalwa, ezihlanganisa i-etherification, i-esterification, kanye ne-oxidation. Ama-cellulose ether aguquliwe abe umphumela anenhlobonhlobo yokusetshenziswa ezimbonini ezahlukahlukene, okuhlanganisa ukudla, ezemithi, izimonyo, ezokwakha, nezindwangu.
Olunye uhlobo oluvamile lwe-cellulose ether eguquliwe i-methyl cellulose (MC), eyakhiwe ngokuphendula i-cellulose nge-methyl chloride. I-MC iyi-polymer engeyona i-ionic, encibilika emanzini esetshenziswa kabanzi njenge-ejenti ejiya ekudleni, njenge-binder kuma-ceramics, nanjengokumboza ekwenzeni iphepha. I-MC inezinzuzo eziningi ngaphezu kwamanye ama-thickeners, njengokukwazi kwayo ukwenza amajeli asobala, ubuthi bayo obuphansi, kanye nokumelana nokuwohloka kwe-enzyme.
Olunye uhlobo lwe-ether ye-cellulose eguquliwe i-hydroxypropyl methyl cellulose (HPMC), eyakhiwe ngokusabela kwe-cellulose ngengxube ye-propylene oxide ne-methyl chloride. I-HPMC iyi-polymer engeyona i-ionic, encibilika emanzini esetshenziswa kabanzi njenge-ejenti ejiyayo ekudleni nasemikhiqizweni yokunakekelwa komuntu siqu, njengesibophezelo kumaphilisi emithi, nanjengentokozo embonini yezokwakha. I-HPMC inezinzuzo eziningana ngaphezu kwamanye ama-thickeners, njengekhono layo lokwenza amajeli azinzile ekugxilweni okuphansi, i-viscosity yayo ephezulu emazingeni okushisa aphansi, kanye nokuhambisana kwayo nohlu olubanzi lwezinye izithako.
I-Carboxymethyl cellulose (CMC) ingolunye uhlobo lwe-ether ye-cellulose eguquliwe eyakhiwa ngokuphendula i-cellulose nge-monochloroacetic acid. I-CMC iyi-polymer encibilika emanzini esetshenziswa kabanzi njenge-ejenti ejiyayo, i-stabilizer, kanye ne-emulsifier ekudleni, emithini yemithi, nakwimikhiqizo yokunakekelwa komuntu siqu. I-CMC inezinzuzo ezimbalwa ngaphezu kwezinye izinto ezijiyayo, njengokukwazi kwayo ukwenza amajeli asobala, amandla ayo okubamba amanzi aphezulu, kanye nokumelana kwawo nokuwohloka kwe-enzyme.
I-Ethyl cellulose (EC) iwuhlobo lwe-ether ye-cellulose eguquliwe eyakhiwa ngokuphendula i-cellulose nge-ethyl chloride. I-EC iyi-polymer engeyona i-ionic, engancibiliki emanzini esetshenziswa kabanzi njengesembozo embonini yezemithi. I-EC inezinzuzo eziningana ngaphezu kwezinye izinto zokumboza, njengekhono layo lokwenza ifilimu eqhubekayo, i-viscosity yayo ephansi, nokumelana kwayo nomswakama nokushisa.
I-Hydroxyethyl cellulose (HEC) ingolunye uhlobo lwe-ether ye-cellulose eguquliwe eyakhiwe ngokuphendula i-cellulose ne-ethylene oxide. I-HEC iyi-polymer encibilika emanzini esetshenziswa kabanzi njenge-ejenti ejiya emikhiqizweni yokunakekelwa komuntu siqu nanjenge-binder kumaphilisi emithi. I-HEC inezinzuzo eziningana ngaphezu kwamanye ama-thickeners, njengekhono layo lokwenza ama-gel obala, amandla ayo okubamba amanzi aphezulu, nokuhambisana kwayo nohlu olubanzi lwezinye izithako.
Izakhiwo kanye nokusetshenziswa kwama-cellulose ether ashintshiwe kuncike ezicini eziningana, njengohlobo lweqembu lamakhemikhali elethulwa, izinga lokushintshwa, isisindo samangqamuzana, kanye nokuncibilika. Isibonelo, ukukhulisa izinga lokushintshwa kwe-MC noma i-HPMC kungakhuphula umthamo wazo wokubamba amanzi kanye ne-viscosity, kuyilapho kunciphisa ukunyibilika kwazo. Ngokufanayo, ukukhulisa isisindo samangqamuzana e-CMC kungakhuphula i-viscosity kanye nekhono layo lokwenza ama-gel, kuyilapho kunciphisa amandla ayo okubamba amanzi.
Ukusetshenziswa kwama-ether e-cellulose ashintshiwe kuningi futhi kuhlukahlukene. Embonini yokudla, asetshenziswa njengama-ejenti okuqina, ama-stabilizer, nama-emulsifiers emikhiqizweni eminingi, okuhlanganisa amasobho, amasoso, okokugqoka kanye nama-dessert. Ama-cellulose ethers ashintshiwe nawo asetshenziswa ekukhiqizeni ukudla okunamafutha aphansi kanye nekhalori ephansi, njengoba ekwazi ukulingisa ukuthungwa namafutha omlomo ngaphandle kokwengeza ama-calories. Ngaphezu kwalokho, asetshenziswa njengezingubo zokugqoka kanye nama-glaze emikhiqizweni ye-confectionery ukuthuthukisa ukubukeka kwabo nokuphila kweshalofu.
Embonini yezemithi, ama-cellulose ethers ashintshiwe asetshenziswa njengezibophezelo, ama-disintegrants, nama-coatings kumaphilisi nama-capsules. Ziphinde zisetshenziswe njengezilungisi ze-viscosity ekwakhekeni koketshezi, njengama-syrups nokumiswa. Ama-ether e-cellulose ashintshiwe ayakhethwa kunezinye izithasiselo, njengoba engasebenzi, ehambisana ne-biocompatible, futhi anobuthi obuphansi. Baphinde banikeze ngezinga eliphezulu lokulawula izinga lokukhululwa kwezidakamizwa, elingathuthukisa ukusebenza kahle nokuphepha kwazo.
Embonini yezimonyo, ama-cellulose ether ashintshiwe asetshenziswa njengama-thieners, ama-emulsifiers, nama-stabilizer kumakhilimu, okokugcoba, namajeli. Zibuye zisetshenziswe njengama-ejenti enza amafilimu emikhiqizweni yokunakekelwa kwezinwele, njengama-shampoos nama-conditioner. Ama-cellulose ethers ashintshiwe angathuthukisa ukuthungwa nokubukeka kwemikhiqizo yezimonyo, futhi athuthukise ukusebenza kwawo nokuzinza.
Embonini yezokwakha, ama-cellulose ether ashintshiwe asetshenziswa njengama-thieners, ama-binder, nama-ejenti okugcina amanzi kusimende, udaka nokhonkolo. Bangakwazi ukuthuthukisa ukusebenza, ukungaguquguquki, namandla alezi zinto, kanye nokunciphisa ukushwabana nokuqhekeka kwazo. Ama-ether e-cellulose ashintshiwe nawo asetshenziswa njengezinto zokumboza nezinamatheliso ezimbozweni zodonga kanye nephansi.
Embonini yendwangu, ama-cellulose ethers ashintshiwe asetshenziswa njengama-sizing agents kanye nama-thickeners ekukhiqizeni izindwangu nezintambo. Bangakwazi ukuthuthukisa ukuphatha nokweluka izakhiwo zendwangu, kanye nokuthuthukisa amandla abo nokuqina.
Sekukonke, ama-ether e-cellulose aguquliwe angamakhemikhali ahlukahlukene futhi abalulekile asebenza kaningi ezimbonini ezahlukahlukene. Banikeza izinzuzo eziningi ngaphezu kwamanye ama-polymers, njengokuhambelana kwawo kwe-biocompatibility, i-biodegradability, kanye nemvelo evuselelekayo. Baphinde banikeze ngezinga eliphezulu lokulawula izakhiwo ezingokomzimba namakhemikhali emikhiqizo, ezingathuthukisa izinga nokusebenza kwazo. Kanjalo, ama-cellulose ether ashintshiwe kungenzeka aqhubeke nokudlala indima ebalulekile ekuthuthukisweni kwemikhiqizo emisha nemisha esikhathini esizayo.
Isikhathi sokuthumela: Apr-22-2023