I-Cellulose ether inokugcinwa kwamanzi okuhle kakhulu, okungavimbela umswakama odongeni olumanzi ukuba uhwamuke ngaphambi kwesikhathi noma ukumuncwa ungqimba oluyisisekelo, futhi uqinisekise ukuthi usimende ugcwele amanzi ngokugcwele, ngaleyo ndlela ekugcineni uqinisekisa izakhiwo zemishini zodaka, okuzuzisa kakhulu. odakeni olunongqimba oluncane kanye nezingqimba eziyisisekelo ezimunca amanzi Noma udaka olwakhiwe ngaphansi kwezinga lokushisa eliphezulu nezimo ezomile. Umthelela wokugcina amanzi we-cellulose ether ungashintsha inqubo yokwakha evamile futhi uthuthukise inqubekelaphambili yokwakha. Isibonelo, ukwakhiwa kwe-plastering kungenziwa kuma-substrates amunca amanzi ngaphandle kokumanzisa ngaphambili.
I-viscosity, umthamo, izinga lokushisa elizungezile kanye nesakhiwo samangqamuzana e-cellulose ether kunomthelela omkhulu ekusebenzeni kwayo kokugcinwa kwamanzi. Ngaphansi kwezimo ezifanayo, i-viscosity enkulu ye-cellulose ether, ukugcinwa kwamanzi kangcono; uma umthamo uphezulu, kuba ngcono ukugcinwa kwamanzi. Ngokuvamile, inani elincane le-cellulose ether lingathuthukisa kakhulu ukugcinwa kwamanzi kodaka. Uma umthamo ufinyelela okuthile Uma izinga lokugcinwa kwamanzi likhuphuka, inkambiso yezinga lokugcinwa kwamanzi iyancipha; lapho izinga lokushisa lendawo likhuphuka, ukugcinwa kwamanzi kwe-cellulose ether ngokuvamile kuyehla, kodwa amanye ama-cellulose ether ashintshiwe nawo anokugcinwa kwamanzi okungcono ngaphansi kwezimo zokushisa eziphezulu; amafayibha anamadigri aphansi okushintsha I-Vegan ether inokusebenza okungcono kokugcinwa kwamanzi.
Iqembu le-hydroxyl ku-cellulose ether molecule kanye ne-athomu ye-oksijini ku-ether bond izohlotshaniswa ne-molecule yamanzi ukuze yakhe isibopho se-hydrogen, iguqule amanzi amahhala abe amanzi abophekile, ngaleyo ndlela idlala indima enhle ekugcineni amanzi; i-molecule yamanzi kanye ne-cellulose ether molecular chain Interdiffusion ivumela ama-molecule amanzi ukuthi angene ngaphakathi kweketango le-cellulose ether macromolecular futhi angaphansi kwamandla aqinile okubopha, ngaleyo ndlela akhe amanzi abophekile kanye namanzi abanjwe, okuthuthukisa ukugcinwa kwamanzi kwe-slurry kasimende; i-cellulose ether ithuthukisa udaka lukasimende olusha. Izakhiwo ze-rheological, ukwakheka kwenethiwekhi enezimbotshana kanye nengcindezi ye-osmotic noma izakhiwo zefilimu ze-cellulose ether zivimbela ukusabalala kwamanzi.
I-Cellulose ether inika udaka olumanzi nge-viscosity enhle kakhulu, engakhuphula ngokuphawulekayo ikhono lokubopha phakathi kodaka olumanzi kanye nongqimba oluyisisekelo, futhi ithuthukise ukusebenza kokulwa nokucwila kodaka. Isetshenziswa kabanzi ekwenzeni udaka, udaka lokuhlanganisa izitini kanye nohlelo lokufakwa kwezindonga lwangaphandle. Umthelela wokujiya we-cellulose ether ungaphinda ukhulise ikhono lokulwa nokuhlakazeka kanye ne-homogeneity yezinto ezisanda kuxutshwa, uvimbele ukuhlukaniswa kwezinto, ukuhlukaniswa nokopha, futhi ungasetshenziswa kukhonkolo yefayibha, ukhonkolo ongaphansi kwamanzi kanye nokhonkolo ozihlanganisayo.
Umphumela wokujiya we-cellulose ether ezintweni ezisekelwe kusimende uvela ku-viscosity yesisombululo se-cellulose ether. Ngaphansi kwezimo ezifanayo, ukuphakama kwe-viscosity ye-cellulose ether, kuba ngcono i-viscosity yezinto ezisekelwe kusimende ezishintshiwe, kodwa uma i-viscosity iphezulu kakhulu, izophazamisa uketshezi nokusebenza kwempahla (njengokunamathisela ummese wokuplasta. ). Udaka oluzilinganisa kanye nokhonkolo ozihlanganisayo, oludinga uketshezi oluningi, ludinga i-viscosity ephansi ye-cellulose ether. Ukwengeza, umphumela wokuqina we-cellulose ether uzokwandisa isidingo samanzi sezinto ezisekelwe kusimende futhi ukwandise isivuno sodaka.
I-viscosity yesisombululo se-cellulose ether incike kulezi zici ezilandelayo: isisindo samangqamuzana e-cellulose ether, ukugxila, izinga lokushisa, izinga le-shear kanye nendlela yokuhlola. Ngaphansi kwezimo ezifanayo, isisindo esikhulu samangqamuzana e-cellulose ether, siphakamisa i-viscosity yesisombululo; ukugxila okuphezulu, ukuphakama kwe-viscosity yesisombululo. Uma uyisebenzisa, ukunakekelwa kufanele kuthathwe ukuze kugwenywe umthamo oweqile futhi kuthinte ukusebenza kodaka nokhonkolo; I-cellulose ether I-viscosity yesisombululo se-ether izokwehla ngokunyuka kwezinga lokushisa, futhi ukuphakama okuphezulu, ithonya elikhulu lokushisa; Isixazululo se-cellulose ether ngokuvamile siwuketshezi oluyi-pseudoplastic olunempahla yokunciphisa i-shear, isilinganiso esikhulu se-shear ngesikhathi sokuhlolwa, i-viscosity encane, ngakho-ke, ukuhlangana kodaka kuzokwehla ngaphansi kwesenzo samandla angaphandle, okuzuzisa ukwakhiwa kodaka, ukuze udaka lube nokusebenza okuhle nokuhlangana ngesikhathi esifanayo; ngenxa yokuthi isixazululo se-cellulose ether asisona esase-Newton Ngoketshezi, lapho izindlela zokuhlola, amathuluzi nezinto zokusebenza noma izindawo zokuhlola ezisetshenziselwa ukuhlola i-viscosity zihlukile, imiphumela yokuhlolwa yesixazululo esifanayo se-cellulose ether izohluka kakhulu.
Ama-molecule e-cellulose ether angalungisa amanye ama-molecule amanzi ezinto ezintsha endaweni ezungezile yeketango lamangqamuzana, ngaleyo ndlela andise i-viscosity yesisombululo. Amaketanga wamangqamuzana e-cellulose ether ahlanganiswe ukuze enze isakhiwo senethiwekhi esinezinhlangothi ezintathu, okuzokwenza futhi isisombululo saso samanzi sibe ne-viscosity enhle.
Isixazululo samanzi se-cellulose ether se-high-viscosity sine-thixotropy ephezulu, okubuye kube isici esikhulu se-cellulose ether. Izixazululo ezinamanzi ze-methyl cellulose ngokuvamile zine-pseudoplastic kanye ne-non-thixotropic fluidity ngaphansi kwezinga lokushisa lejeli, kodwa zibonisa izakhiwo zokugeleza kwe-Newtonian ngamanani aphansi e-shear. I-Pseudoplasticity iyanda ngesisindo se-molecular noma ukugxila kwe-cellulose ether, kungakhathaliseki ukuthi hlobo luni lwe-substitute kanye nezinga lokushintsha. Ngakho-ke, ama-cellulose ethers webanga elifanayo le-viscosity, kungakhathaliseki ukuthi i-mc, i-HPmc, i-HEmc, izohlale ibonisa izici ezifanayo ze-rheological inqobo nje uma ukugxila nokushisa kugcinwa njalo. Ama-gel esakhiwo akhiwa lapho izinga lokushisa liphakanyiswa, futhi ukugeleza kwe-thixotropic kakhulu kwenzeka. I-concentration ephezulu kanye ne-viscosity ephansi ye-cellulose ethers ibonisa i-thixotropy ngisho nangaphansi kwezinga lokushisa le-gel. Lesi sakhiwo sinenzuzo enkulu ekulungisweni kokulinganisa nokuwohloka ekwakhiweni kodaka lokwakha. Kudingeka kuchazwe lapha ukuthi ukuphakama kwe-viscosity ye-cellulose ether, ukugcinwa kwamanzi kangcono, kodwa ukuphakama kwe-viscosity, ukuphakama kwesisindo samangqamuzana e-cellulose ether, kanye nokuncipha okuhambisanayo kokuncibilika kwayo, okunomthelela omubi. ekugxilweni kodaka nokusebenza kokwakhiwa. Ukuphakama kwe-viscosity, kusobala kakhulu umphumela wokuqina odongeni, kodwa awulingani ngokuphelele. I-viscosity ethile emaphakathi nephansi, kodwa i-cellulose ether eshintshiwe inokusebenza okungcono ekuthuthukiseni amandla esakhiwo sodaka olumanzi. Ngokukhula kwe-viscosity, ukugcinwa kwamanzi kwe-cellulose ether kuyathuthuka.
Isikhathi sokuthumela: Feb-28-2023