Cellulose ether chinhu chakakosha chepolymer chinoshandiswa zvakanyanya mukuvaka, mishonga, chikafu uye mamwe minda. Yayo yekuchengetedza mvura pfuma ndechimwe chezvinhu zvakakosha zvebasa rayo mumashandisirwo mazhinji. Kuita kwekuchengetedza mvura kunobata zvakananga kunamatira, ductility uye kuita kwekuvaka kwezvinhu. Iyo etherification degree uye tembiricha ye cellulose ether zvinhu zviviri zvakakosha zvinokanganisa kuchengetwa kwayo kwemvura.
Mhedzisiro ye etherification degree ye cellulose ether pakuchengetedza mvura
Cellulose ethers inoumbwa nekushandura chikamu chehydroxyl che cellulose kuita mapoka eether. Chiyero che etherification chinoreva nhamba yemapoka ether akaunzwa pane yega yega glucose unit, iyo inoshandiswa kuyera dhigirii rekutsiva cellulose ethers. Iyo dhigirii ye etherification ine zvakakosha pakuchengetedza mvura kwe cellulose ethers. Kazhinji kutaura, sezvo dhigirii re etherification rinowedzera, iyo hydrophilicity ye cellulose ether inowedzera, uye kushanda kwayo kwekuchengetedza mvura kunowedzerawo.
Iyo yakakwirira dhigirii ye etherification, iyo yakawanda hydrophilic mapoka (akadai se methoxy, ethoxy, nezvimwewo) akaunzwa mu cellulose ether molecular chain. Aya mapoka anogona kudyidzana nemamorekuru emvura kuburikidza nehydrogen bond, kusimbisa cellulose Iyo adsorption kugona kweether kumamorekuru emvura. Naizvozvo, cellulose ethers ane etherification madhigirii epamusoro anogona kutora uye kuchengetedza mvura yakawanda munzvimbo dzine mwando, zvichiita kuti ive yakanaka mukuchengetedza mvura.
Nekudaro, iyo yakakwirira dhigirii ye etherification, zviri nani. Apo dhigirii ye etherification inosvika pane imwe nhanho, kuchengetwa kwemvura ye cellulose ether hakugoni kuramba kuchiwedzera nekuwedzera kwechiyero che etherification, uye inogona kutoderera. Izvi zvinodaro nekuti kana iyo etherification yakanyanya kukwirira, chimiro che cellulose ether molecular chain chinogona kushanduka, zvichikonzera kupera simba kweiyo intermolecular simba, pakupedzisira ichikanganisa kunyura kwayo kwemvura uye kuchengetwa kwemvura. Naizvozvo, mumashandisirwo anoshanda, ma cellulose ether ane madhigirii etherification akakodzera anofanirwa kusarudzwa zvichienderana nemamiriro ezvinhu.
Mhedzisiro yekushisa pakuchengetedza mvura kwe cellulose ethers
Tembiricha chimwe chinhu chine simba rakakosha pakuchengetwa kwemvura ye cellulose ethers. Pasi pemamiriro ekushisa akasiyana, nzvimbo yekuchengetedza mvura ye cellulose ethers inoita zvakasiyana. Kazhinji, kuwedzera kwekushisa kuchaita kuti kuderera kwekuchengetedza kwemvura kwe cellulose ethers. Izvi zvinodaro nekuti kukwira kwekushisa kunomhanyisa kubuda kwemvura, zvichiita kuti zviome kuti zvinhu zvichengetedze unyoro.
Pakudziya kwakadzikira, kudyidzana pakati pe cellulose ether mamorekuru nemamorekuru emvura kwakasimba, zvichikonzera kuchengetedza mvura kuri nani. Sezvo tembiricha inowedzera, mamorekuru emvura anobuda nekukurumidza, uye simba rekubata mvura re cellulose ether rinopera zvishoma nezvishoma. Mukuwedzera, kuwedzera kwekushisa kunogona kukanganisa kunyungudika kwe cellulose ethers. Pasi pemamwe mamiriro ekupisa kwepamusoro, cellulose ether inogona kurasikirwa nekunyungudika uye kutadza kuumba yunifomu mhinduro kana colloid, zvichikanganisa kushanda kwayo kwekuchengetedza mvura.
Zvakakosha kuziva kuti marudzi akasiyana-siyana e-cellulose ethers ane zvakasiyana-siyana zvekunzwa kune kuchinja kwekushisa. Mamwe ma cellulose ether anogona kuramba achichengetedza mvura zvakanaka patembiricha yepamusoro, nepo mamwe achizowana kudzikira kukuru mukuchengetedza mvura kana tembiricha yakwira zvishoma. Saka, pakusarudza cellulose ether, zvinodikanwa kuita sarudzo yakakodzera zvichienderana nemamiriro ekushisa enzvimbo yekushandisa.
Kudyidzana pakati pedhigirii etherification uye tembiricha
Mhedzisiro yedhigirii etherification uye tembiricha pakuchengetedza kwemvura ye cellulose ether inowanzo pindirana. Mukushandiswa kunoshanda, zvinhu zviviri izvi zvinowanzoda kutariswa zvizere. Semuyenzaniso, kana cellulose ether ine dhigirii repamusoro re etherification ichishandiswa munzvimbo ine tembiricha yepamusoro, kunyangwe dhigirii repamusoro re etherification rinogona kuwedzera kuchengetwa kwemvura ye cellulose ether, chiyero chekubuda kwemvura munzvimbo ine tembiricha yepamusoro ichave zvakare. yakamhanyisa zvakafanira, nokudaro ichideredza simba rayo rekuchengetedza mvura. Nokudaro, munzvimbo dzepamusoro-soro, zvingave zvakakosha kushandisa cellulose ethers ine zvigadziro zvakagadziridzwa kuti zvivandudze kupikisa kwavo kwepamusoro uye kuchengetedza mvura.
Pane zvinopesana, munzvimbo yakaderera yekushisa, mhedzisiro ye etherification degree pakuchengetedza kwemvura ye cellulose ether inogona kuve pachena. Pasi pemamiriro ekunze ekupisa, mvura inobuda zvishoma nezvishoma, uye cellulose ether ine dhigirii yakakwira yeetherification inogona kushandisa zvizere kugona kwayo kunyudza mvura, nekudaro ichivandudza mashandiro ekuchengetedza mvura kwezvinhu.
Iyo etherification degree uye tembiricha ye cellulose ether zvinhu zvakakosha zvinokanganisa mashandiro ayo ekuchengetedza mvura. Iyo yakakwirira dhigirii ye etherification, iyo yakasimba iyo hydrophilicity ye cellulose ether uye zviri nani kuchengetedza kwemvura kuita. Nekudaro, yakawandisa dhigirii ye etherification inogona kutungamira kune shanduko muchimiro chemolecular, nekudaro ichikanganisa kuchengetwa kwemvura. Kukwira kwekushisa kunowanzoita kuti kuderera kwekuchengetedza kwemvura kwe cellulose ethers. Kunyanya munzvimbo dzekupisa kwepamusoro, kubuda kwemvura kunowedzera, kunokanganisa kuchengetedza kwemvura. Mumashandisirwo anoshanda, zvinodikanwa kusarudza cellulose ether ine dhigirii rakakodzera reetherification zvichibva pane chaiyo tembiricha mamiriro uye mashandisiro ezvinodiwa kuti uwane yakanyanya kunaka kuchengetedza mvura.
Nguva yekutumira: Sep-18-2024