Odakeni oseluvele uxubile, ingcosana nje ye-cellulose ether ingathuthukisa kakhulu ukusebenza kodaka olumanzi. Kungabonakala ukuthi i-cellulose ether iyisengezo esikhulu esithinta ukusebenza kokwakhiwa kodaka. Ukukhetha ama-cellulose ethers ezinhlobonhlobo ezahlukene, ama-viscosity ahlukene, ubukhulu bezinhlayiya ezihlukene, amadigri e-viscosity ahlukene kanye namanani angeziwe nawo anemiphumela ehlukene ekuthuthukiseni ukusebenza kodaka olomile. Njengamanje, amatshe amaningi okwakha amatshe kanye nodaka anezindawo ezimbi zokugcina amanzi. I-slurry yamanzi izohlukana ngemva kokuyishiya yodwa imizuzu embalwa. Ngakho-ke, kubaluleke kakhulu ukwengeza i-cellulose ether odakeni lukasimende. Ake sibheke kabanzi imisebenzi ye-cellulose ether odakeni lukasimende!
1.Ukugcinwa kwe-cellulose ether-water
Ukugcinwa kwamanzi kuyimpahla ebalulekile ye-cellulose ether, futhi futhi kuyimpahla abakhiqizi abaningi basekhaya abaxubene nodaka, ikakhulukazi labo abasesifundeni esiseningizimu enamazinga okushisa aphakeme, banake. Ekukhiqizeni izinto zokwakha, ikakhulukazi udaka oluxubene elomile, i-cellulose ether idlala indima engenakushintshwa, ikakhulukazi ekukhiqizeni udaka olukhethekile (udaka oluguquliwe), luyingxenye ebalulekile futhi ebalulekile.
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 izinga lokugcinwa kwamanzi odaka. Lapho umthamo ufinyelela izinga elithile, umkhuba wokwandisa izinga lokugcinwa kwamanzi uyancipha; ukugcinwa kwamanzi kwe-cellulose ether ngokuvamile kuyehla ngokunyuka kwezinga lokushisa elizungezile, kodwa amanye ama-cellulose ether ashintshiwe nawo anokugcinwa kwamanzi okuhle ngaphansi kwezimo eziphakeme zokushisa; ama-cellulose ether anedigri ephansi yokufaka esikhundleni anokusebenza okungcono kokugcinwa kwamanzi.
Amaqembu e-hydroxyl kuma-molecule e-cellulose ether kanye nama-athomu e-oksijini kumabhondi e-ether azokwakha izibopho ze-hydrogen nama-molecule wamanzi, aphendule amanzi mahhala abe amanzi aboshwe, ngaleyo ndlela adlale indima enhle ekugcineni amanzi; ukuhlukana phakathi kwama-molecule amanzi kanye namaketanga e-cellulose ether yamangqamuzana kuvumela ama-molecule amanzi ukuthi angene ngaphakathi kweketango le-cellulose ether macromolecular futhi abe ngaphansi kwemingcele eqinile, ngaleyo ndlela enze amanzi amahhala kanye namanzi abanjwe, ngaleyo ndlela athuthukise ukugcinwa kwamanzi kwe-slurry kasimende; i-cellulose ether ithuthukisa izici ze-rheological, ukwakheka kwenethiwekhi enezimbotshana kanye nengcindezi ye-osmotic ye-slurry entsha kasimende, noma izakhiwo zefilimu ze-cellulose ether zivimbela ukusakazeka kwamanzi.
2.I-cellulose ether-thickening kanye ne-thixotropy
I-cellulose ether inikeza udaka olumanzi i-viscosity enhle kakhulu, engakhuphula ngokuphawulekayo ikhono lokubopha phakathi kodaka olumanzi kanye nongqimba oluyisisekelo, futhi ithuthukise ukusebenza kwe-anti-sag yodaka. Isetshenziswa kabanzi ekudaleni udaka, udaka lwe-tile bonding kanye nezinhlelo zokuvala udonga zangaphandle. Ukuqina komphumela we-cellulose ether nakho kungakhuphula ukumelana nokuhlakazeka kanye ne-homogeneity yezinto ezintsha, kuvimbele ukuhlukaniswa kwezinto, ukuhlukaniswa kanye nokopha, futhi kungasetshenziswa kukhonkolo ye-fiber, 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 eziguquliwe ezisekelwe kusimende. Kodwa-ke, uma i-viscosity iphezulu kakhulu, izophazamisa uketshezi nokusebenza kwempahla (njengokunamathela kummese we-plaster). Izinsimbi ezizilinganisa kanye nokhonkolo ozihlanganisayo odinga uketshezi oluningi zidinga i-viscosity ephansi ye-cellulose ether. Ngaphezu kwalokho, umphumela wokujiya we-cellulose ethers ukhuphula isidingo samanzi sezinto ezisekelwe kusimende futhi andise isivuno sodaka.
Isixazululo se-aqueous cellulose cellulose ether esine-high-viscosity sine-thixotropy ephezulu, ephinde ibe yisici esikhulu se-cellulose ether. Izixazululo ezinamanzi ze-methylcellulose ngokuvamile zinezindawo zokugeleza ze-pseudoplastic, ezingezona eze-thixotropic ezingaphansi kwezinga lokushisa lejeli, kodwa zibonisa izakhiwo zokugeleza kwe-Newtonian ngamanani aphansi e-shear. I-Pseudoplasticity iyanda ngokukhula kwesisindo sengqamuzana noma ukuhlangana kwe-cellulose ether, kungakhathaliseki ukuthi hlobo luni nezinga lokushintshwa kwento ebambele. Ngakho-ke, ama-cellulose ethers webanga elifanayo le-viscosity, kungakhathaliseki ukuthi i-MC, i-HPMC, noma i-HEMC, izohlale ibonisa izici ezifanayo ze-rheological inqobo nje uma ukugxila nokushisa kugcinwa njalo. Lapho izinga lokushisa likhuphuka, i-gel yesakhiwo iyakhiwa futhi ukugeleza okuphezulu kwe-thixotropic kwenzeka.
Ukugxila okuphezulu kanye ne-viscosity ephansi ye-cellulose ethers kubonisa i-thixotropy ngisho nangaphansi kwezinga lokushisa lejeli. Lesi sakhiwo sinenzuzo enkulu ekulungiseni izakhiwo ezilinganisayo nezinciphayo zodaka lokwakha ngesikhathi sokwakha. Kumele kuqashelwe lapha ukuthi ukuphakama kwe-viscosity ye-cellulose ether, ukugcinwa kwamanzi kangcono, kodwa ukuphakama kwe-viscosity, ukuphakama kwesisindo samangqamuzana e-cellulose ether, futhi ukuncibilika kwayo kuncipha ngokufanele, okunomthelela omubi ekugxilweni kodaka kanye nokusebenza kokwakhiwa.
3.I-Cellulose ether-air entraining effect
I-Cellulose ether inomphumela obalulekile wokufaka umoya ezintweni ezintsha ezisekelwe kusimende. I-cellulose ether inawo womabili amaqembu e-hydrophilic (amaqembu e-hydroxyl, amaqembu e-ether) namaqembu e-hydrophobic (amaqembu e-methyl, izindandatho ze-glucose). I-surfactant enomsebenzi ongaphezulu futhi ngaleyo ndlela inomphumela wokungenisa umoya. Umphumela wokufaka umoya we-cellulose ether uzoveza umphumela "webhola", ongathuthukisa ukusebenza kwezinto ezisanda kuxutshwa, njengokwandisa ipulasitiki kanye nokushelela kodaka ngesikhathi sokusebenza, okuzuzisa ukugandaywa kodaka; kuzophinde kwenyuse ukukhiqizwa kukadaka futhi kunciphise izindleko zokukhiqiza udaka; kodwa kuzokwandisa i-porosity yezinto eziqinile futhi kunciphise izakhiwo zabo zemishini njengamandla kanye ne-elastic modulus.
Njenge-surfactant, i-cellulose ether nayo inomphumela wokumanzisa noma wokugcoba ezinhlayiyeni zikasimende, okuthi kanye nomphumela wawo wokungenisa umoya okhuphule ubumanzi bezinto ezisekelwe kusimende, kodwa umphumela wawo wokujiya uzonciphisa uketshezi. Umphumela we-cellulose ether ku-fluidity yezinto ezisekelwe kusimende inhlanganisela ye-plasticization kanye nemiphumela yokuqina. Ngokuvamile, lapho umthamo we-cellulose ether uphansi kakhulu, ubonakala ngokuyinhloko njenge-plasticizing noma umphumela wokunciphisa amanzi; lapho umthamo uphezulu, umphumela wokujiya we-cellulose ether ukhula ngokushesha, futhi umphumela wawo wokungenisa umoya uvame ukugcwala, ngakho ubonakala njengomphumela wokujiya noma ukwanda kwesidingo samanzi.
4.Umphumela we-cellulose ether-retarding
I-Cellulose ether izokwandisa isikhathi sokumisa ukunamathisela kukasimende noma udaka futhi ibambezele amandla okuguquguquka kukasimende, okuzuzisa ukwandisa isikhathi sokusebenza sezinto ezintsha zengxube futhi kuthuthukiswe ukulahlekelwa okuncike esikhathini sokungaguquguquki kodaka kanye nokuwohloka kukakhonkolo, kodwa kungase futhi kubambezele inqubekelaphambili yokwakha.
Isikhathi sokuthumela: Sep-24-2024