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, kungcono ukugcina amanzi, kodwa ukuphakama kwe-viscosity, ukuphakama kwesisindo samangqamuzana e-cellulose ether, futhi ukuncibilika kwayo kuncipha ngokufanele, okunomthelela omubi ukugxila kodaka 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 sokusetha sokunamathisela usimende noma udaka futhi ibambezele amandla kasimende we-hydration, okuzuzisa ukwandisa isikhathi sokusebenza sezinto ezintsha ezixubekile futhi kuthuthukiswe ukulahlekelwa okuncike esikhathini sokungaguquguquki kodaka kanye nokuwohloka kukakhonkolo, kodwa kungase futhi. ukubambezela inqubekelaphambili yokwakha.
Isikhathi sokuthumela: Sep-24-2024