Ku-fortar owomile, i-ether ye-cellulose idlala indima yokugcinwa kwamanzi, ukuqina kanye ne-thixotropy, ukubhala umoya kanye nokubuyisa izakhiwo. Umthamo omuhle wokugcina amanzi wenza i-yment hydration ephelele ngokwengeziwe, ingathuthukisa ukubonwa kodaka olumanzi, khulisa amandla okubopha ngodaka, futhi ku-ceramic tile bonder udaka, kungandisa isikhathi sokuvula bese ulungisa isikhathi. Ukungeza i-cellulose ether kudaka lokufafaza ngomshini kungathuthukisa amandla wesakhiwo sodaka. Ukuzilinganisa kungavimbela ukuhlala, ukuhlukaniswa kanye nokuhlukaniswa, njll. Ngakho-ke, i-cellulose ether iyasetshenziswa kabanzi ku-powder powder kawoti njengesengezo esibalulekile. Ukuze unikeze ukudlala okugcwele ekusetshenzisweni kwe-cellulose ether ngodaka oluhlanganisiwe omile, kubalulekile futhi ukukhetha uhlobo lwe-cellulose ether futhi unqume.
1. Ukugcinwa kwamanzi kwe-cellulose ether
①Ukuphakama okuphezulu kwe-pollulose ether, kungcono ukusebenza kokugcinwa kwamanzi, kanye nokubonakala kwesisombululo se-polymer. Ngokuya ngesisindo se-molecular (i-polymerization degree) ye-polymer nayo inqunywa ubude be-chain yesakhiwo samangqamuzana kanye nokwakheka kochungechunge, kanye nokusatshalaliswa kwezinhlobo nezinhlobo zabanye zithinta ngqo uhla lwento yokutholwa.
②Ukukhulu inani le-cellulose ether elingezwe kudaka, okungcono ukusebenza kokugcinwa kwamanzi, kanye nokuphakama okuphezulu, ukusebenza kangcono kokugcinwa kwamanzi.
③ Mayelana nosayizi wezinhlayiyana, the Perfer the Particle, okungcono ukugcinwa kwamanzi. Ngemuva kwezinhlayiya ezinkulu ze-cellulose ether zithintana namanzi, ingaphezulu lincibilika ngokushesha futhi lakha ijeli lokusonga lokho kuvimbela ama-molecule wamanzi ekungeneni. Kwesinye isikhathi akunakusakazwa ngokufana futhi kuncibilike ngisho nangemva kokushukumisa isikhathi eside, kwakha isixazululo esinamafu esinamafu noma i-agglomeration. Kuthinta kakhulu ukugcinwa kwamanzi kwe-cellulose ether, futhi i-solubility kungenye yezinto zokukhetha i-cellulose ether.
2. Ukuqina kanye ne-thixotropy ye-cellulose ether
Umsebenzi wesibili we-cellulose ether - ukuqina kuncike ku: izinga le-polymerization ye-cellulose ether, ukuhlupheka kwesixazululo, izinga lokushisa, izinga lokushisa kanye nezinye izimo. Impahla ecebile yesisombululo ihlukile ku-ALKYL Cellulose kanye nama-derivatives alo aguquliwe. Izakhiwo ze-gelation zihlobene nezinga lokufaka esikhundleni, ukugxilisa izixazululo kanye nezithasiselo. Nge-Hydroxyalkyl Decivatives eguquliwe, izakhiwo ze-gel nazo zihlobene neziqu zokuguqulwa kwe-hydroxyalkyl. Ku-MC ne-HPMC enokubonakala okuphansi, kulungiswa isixazululo sokuhlushwa esingu-10% Isisindo esiphakeme se-molecular celvulosise ether sisebenza kahle kakhulu. Esixazululweni sokuhlushwa esifanayo, ama-polymers anezinsimbi ezihlukile zamangqamuzana ane -yize zibonakale ama-viscosities. Degree ephezulu. I-Viscosity Target ingatholakala kuphela ngokungeza inani elikhulu le-molecular isisindo se-cellulose ether. I-viscosity yayo inokuncika okuncane kwezinga le-shear, futhi i-viscosity ephezulu ifinyelela ekuboniseni okuqondiwe, futhi inani lentengo elidingekayo lincane, futhi i-viscoty incike ekusebenzeni kahle. Ngakho-ke, ukufeza ukungaguquguquki okuthile, inani elithile le-cellulose ether (ukugxila kwesixazululo) nesixazululo kufanele kuqinisekiswe. Izinga lokushisa le-gel lesixazululo libuye linciphise ngokuqondile ngokwanda kokuqoqwa kwesixazululo, nama-gel ama-gels ekushiseni kwekamelo ngemuva kokufinyelela kokuhlushwa okuthile. Ukuhlushwa kwama-gelling kwe-HPMC kuphakeme emazingeni okushisa asekamelweni.
Ukungaguquguquki kungashintshwa futhi ngokukhetha usayizi wezinhlayiyana kanye nokukhetha izithambiso ze-cellulose ezinamazinga ahlukene wokuguqulwa. Ukubizwa okubizwa ngokuthi ukuguqulwa kwezokwethula iqembu le-hydroxyalkyl ngezinga elithile lokufaka esikhundleni sesakhiwo se-Skeleton se-MC. Ngokushintsha amanani wokufakwa esikhundleni salezi zinto ezimbili, okungukuthi, ama-DS kanye nama-MS ahlobene namagugu amaqembu e-methoxy ne-hydroxyalkyly esivame ukusho. Izidingo ezihlukene zokusebenza kwe-cellulose ether zingatholakala ngokushintsha amanani wokufakwa esikhundleni salezi zinto ezimbili.
Ukungezwa kwe-cellulose ether kuthinta ukusetshenziswa kwamanzi kodaka futhi kushintsha isilinganiso samanzi-kusosimende, okuwumphumela wokuqina. Ukuphakama komthamo, kukhulisa ukusetshenziswa kwamanzi.
I-Cellulose Tashers esetshenziselwa izinto zokwakha eziyimpuphu kufanele ichitheke ngokushesha emanzini abandayo futhi inikeze ukuvumelana okufanele kohlelo. Uma unikezwe isilinganiso esithile se-shear, kusaba yi-blocculent ne-colloidal block, okuwumkhiqizo ongaphansi noma ongemuhle.
Kukhona nobudlelwano obuhle obuqondile phakathi kokuvumelana kokufana kukakhonkolo kanye nomthamo we-cellulose ether. I-Cellulose Ether ingakhulisa kakhulu ukubonana kodaka. Okukhudlwana umthamo, umphumela osobala.
Isixazululo esiphakeme se-cellule Izisombululo zamanzi ezinamanzi ze-MC-Type polymers zivame ukuba ne-pseudoplastic ne-non-twixotropic ephansi yokushisa kwe-gel, kepha izakhiwo ze-Newtonian Flow ephansi ngamanani aphansi. I-Pseudoplaltity inyuka ngesisindo se-molecular noma ukugxila kwe-cellulose ether, kungakhathalekile ukuthi uhlobo lokungena esikhundleni kanye nesilinganiso sokufaka esikhundleni. Ngakho-ke, i-cellulose i-Teshers yebanga elifanayo lokubonana, noma ngabe i-MC, i-HPMC, i-hemc, izohlala ikhombisa izakhiwo ezifanayo zembongo inqobo nje uma ukugxila nokushisa kugcinwa njalo. Ama-Gels ahlelekile akhiwa lapho izinga lokushisa liphakama, futhi ukuhamba kakhulu kwe-thixotropic kwenzeka. Ukuhlushwa okuphezulu nokuvulekezwa okuphansi kuselula Le mpahla inzuzo enkulu kulungiswa kokulinganisa nokugcoba ekwakhiweni kokwakhiwa kodaka. Kudinga ukuchazwa lapha ukuthi ukukhuphuka kwendlela kaCellulose Ether, kungcono ukugcinwa kwamanzi, kepha kukhuphuka isisindo esilinganiselwe se-moleculaty, kanye nokwehla okuhambisanayo kokusebenza kwayo kokuhlaselwa kwayo nokwakha. Lapho kukhuphuka khona i-viscosity, kusobala kakhulu umphumela wokuqina kudaka, kepha alufani ngokuphelele. Ukubonakaliswa okuphakathi nendawo okuphansi, kepha i-ether eguqulwe ngokuguqulwa inokusebenza okungcono ekuthuthukiseni amandla wesakhiwo sodaka lwamanzi. Ngokwanda kwe-viscosity, ukugcinwa kwamanzi kwe-cellulose ether kuyathuthuka.
Isikhathi sePosi: Mar-14-2023