I-Cellulose ether iyinto ebalulekile ye-polymer esetshenziswa kakhulu ezintweni zokwakha, imithi, ukudla kanye neminye imikhakha. Impahla yayo yokugcina amanzi ingenye yezinto ezibalulekile zendima yayo ezinhlelweni eziningi. Ukusebenza kokugcinwa kwamanzi kuthinta ngokuqondile ukunamathela, i-ductility nokusebenza kokwakhiwa kwento. Idigri ye-etherification kanye nezinga lokushisa le-cellulose ether yimingcele emibili ebalulekile ethinta ukugcinwa kwayo kwamanzi.
Umthelela wedigri ye-etherification ye-cellulose ether ekugcinweni kwamanzi
Ama-cellulose ether akhiwa ngokuguqula ingxenye ye-hydroxyl ye-cellulose ibe amaqembu e-ether. Izinga le-etherification libhekisela enanini lamaqembu e-ether ethulwe kuyunithi ngayinye ye-glucose, esetshenziselwa ukukala izinga lokushintshwa kwama-cellulose ethers. Izinga le-etherification linomthelela omkhulu ekugcineni amanzi ama-cellulose ethers. Ngokuvamile, njengoba izinga le-etherification likhula, i-hydrophilicity ye-cellulose ether iyakhula, nokusebenza kwayo kokugcinwa kwamanzi nakho kuyanda.
Uma izinga le-etherification liphakeme, amaqembu amaningi e-hydrophilic (njenge-methoxy, ethoxy, njll.) angeniswa kuketango lamangqamuzana e-cellulose ether. Lawa maqembu angakwazi ukusebenzisana nama-molecule amanzi ngokusebenzisa izibopho ze-hydrogen, aqinise i-cellulose Amandla okukhangisa we-ether kuma-molecule amanzi. Ngakho-ke, ama-cellulose ether anamadigri e-etherification aphezulu angamunca futhi agcine amanzi amaningi ezindaweni ezinomswakama, awenze abe yinhle kakhulu ezindaweni zokugcina amanzi.
Kodwa-ke, ukuphakama kwezinga le-etherification, kungcono. Uma izinga le-etherification lifinyelela izinga elithile, ukugcinwa kwamanzi kwe-cellulose ether kungase kungaqhubeki nokukhula ngokwenyuka kwezinga le-etherification, futhi kungase kunciphe. Lokhu kungenxa yokuthi uma i-etherification iphezulu kakhulu, ukwakheka kweketango lamangqamuzana e-cellulose ether kungase kushintshe, okubangele ukuba buthakathaka kwamandla e-intermolecular, ekugcineni kuthinte ukumuncwa kwawo kwamanzi nokugcinwa kwamanzi. Ngakho-ke, ekusebenziseni okungokoqobo, ama-cellulose ether anamadigri e-etherification afanele adinga ukukhethwa ngokuya ngezimo ezithile.
Umthelela wezinga lokushisa ekugcinweni kwamanzi ama-cellulose ethers
Izinga lokushisa lingesinye isici esinomthelela obalulekile ekugcinweni kwamanzi kwama-cellulose ethers. Ngaphansi kwezimo zokushisa ezihlukene, izici zokugcina amanzi ze-cellulose ether ziziphatha ngendlela ehlukile. Ngokuvamile, ukwanda kwezinga lokushisa kuzoholela ekwehleni kokugcinwa kwamanzi kwe-cellulose ethers. Lokhu kungenxa yokuthi amazinga okushisa akhuphukayo asheshisa ukuhwamuka kwamanzi, okwenza kube nzima ngempahla ukugcina umswakama.
Emazingeni okushisa aphansi, ukusebenzisana phakathi kwama-molecule e-cellulose ether nama-molecule amanzi kunamandla, okuholela ekugcinweni kwamanzi okungcono. Njengoba izinga lokushisa likhula, amangqamuzana amanzi ahwamuka ngokushesha, futhi amandla okubamba amanzi e-cellulose ether aya ngokuya eba buthaka. Ngaphezu kwalokho, izinga lokushisa elikhulayo lingathinta ukunyibilika kwama-cellulose ethers. Ngaphansi kwezimo ezithile zokushisa okuphezulu, i-cellulose ether ingase ilahlekelwe ukunyibilika futhi yehluleke ukwakha isixazululo esifanayo noma i-colloid, ngaleyo ndlela ithinte ukusebenza kwayo kokugcinwa kwamanzi.
Kuyaphawuleka ukuthi izinhlobo ezahlukene ze-cellulose ethers zinokuzwela okuhlukile ekushintsheni kwezinga lokushisa. Amanye ama-cellulose ether asengagcina ukugcinwa kwamanzi okuhle emazingeni okushisa aphakeme, kuyilapho amanye azothola ukwehla okuphawulekayo kokugcinwa kwamanzi lapho izinga lokushisa likhuphuka kancane. Ngakho-ke, lapho ukhetha i-cellulose ether, kuyadingeka ukwenza ukukhetha okufanele ngokusekelwe ezimweni zokushisa zendawo yokusetshenziswa.
Ukusebenzisana phakathi kwezinga le-etherification nezinga lokushisa
Imiphumela yedigri ye-etherification kanye nezinga lokushisa ekugcinweni kwamanzi kwe-cellulose ether ngokuvamile kuyasebenzisana. Ekusetshenzisweni okungokoqobo, lezi zici ezimbili ngokuvamile zidinga ukucatshangelwa ngokugcwele. Isibonelo, lapho i-cellulose ether enezinga eliphezulu le-etherification isetshenziswa endaweni enezinga lokushisa eliphezulu, nakuba izinga eliphezulu le-etherification lingakhuphula ukugcinwa kwamanzi e-cellulose ether, izinga lokuhwamuka kwamanzi endaweni enezinga lokushisa eliphezulu nalo lizoba ngcono. isheshiswe ngokufanele, ngaleyo ndlela yenza buthaka umphumela wayo wangempela wokugcina amanzi. Ngakho-ke, ezindaweni ezishisa kakhulu, kungase kudingeke ukuthi kusetshenziswe i-cellulose ethers enezakhiwo ezilungiswe ngokukhethekile ukuze kuthuthukiswe ukumelana nokushisa okuphezulu nokugcinwa kwamanzi.
Ngokuphambene nalokho, endaweni yokushisa ephansi, umphumela wedigri ye-etherification ekugcinweni kwamanzi e-cellulose ether ungase ubonakale kakhudlwana. Ngaphansi kwezimo zokushisa eziphansi, amanzi ahwamuka kancane, futhi i-cellulose ether enezinga eliphezulu le-etherification ingasebenzisa ngokugcwele umthamo wayo wokumunca amanzi, ngaleyo ndlela ithuthukise ukusebenza kokugcinwa kwamanzi kwento.
Idigri ye-etherification kanye nezinga lokushisa le-cellulose ether yizici ezibalulekile ezithinta ukusebenza kwayo kokugcinwa kwamanzi. Uma izinga le-etherification liphakeme, i-hydrophilicity ye-cellulose ether iba namandla kanye nokusebenza kahle kokugcinwa kwamanzi. Kodwa-ke, izinga eliphezulu kakhulu le-etherification lingase liholele ezinguqukweni zesakhiwo samangqamuzana, ngaleyo ndlela kuthinte ukugcinwa kwamanzi. Ukwenyuka kwezinga lokushisa ngokuvamile kuholela ekwehleni kokugcinwa kwamanzi kwe-cellulose ethers. Ikakhulukazi ezindaweni zokushisa okuphezulu, ukuhwamuka kwamanzi kuyashesha, okuthinta umphumela wokugcina amanzi. Ezisetshenziswa ezingokoqobo, kuyadingeka ukukhetha i-cellulose ether enezinga elifanele le-etherification ngokusekelwe ezimweni ezithile zokushisa nezimfuneko zokusetshenziswa ukuze kuzuzwe umphumela ongcono kakhulu wokugcina amanzi.
Isikhathi sokuthumela: Sep-18-2024