Ukubuka konke: okubizwa ngokuthi i-HPMC, i-powder emhlophe noma engeyona emhlophe ene-fibrous noma i-granular. Kunezinhlobo eziningi ze-cellulose futhi zisetshenziswa kabanzi, kodwa sixhumana kakhulu namakhasimende embonini yezinto zokwakha zempuphu eyomile. I-cellulose evame kakhulu ibhekisela ku-hypromellose.
Inqubo Yokukhiqiza: Izinto zokusetshenziswa eziyinhloko ze-HPMC: ukotini ocwengekile, i-methyl chloride, i-propylene oxide, ezinye izinto zokusetshenziswa zifaka phakathi i-flake alkali, i-acid, i-toluene, i-isopropanol, njll. Phatha i-cellulose yekotini ecwengekile ngesisombululo se-alkali ku-35-40℃ isigamu sehora, cindezela, ucole i-cellulose, bese ukhula kahle ku-35℃, ukuze izinga elimaphakathi le-polymerization ye-alkali fiber etholiwe libe ngaphakathi kobubanzi obudingekayo. Faka imicu ye-alkali eketeleni le-etherification, engeza i-propylene oxide kanye ne-methyl chloride ngokulandelana, bese u-etherify ku-50-80 °C amahora ama-5, ngokucindezela okuphezulu okungaba ngu-1.8 MPa. Bese ufaka inani elifanele le-hydrochloric acid kanye ne-oxalic acid emanzini ashisayo ku-90 °C ukuze ugeze izinto ukuze wandise ivolumu. Khipha amanzi nge-centrifuge. Geza kuze kube yilapho kungathathi hlangothi, futhi lapho okuqukethwe komswakama ezintweni kungaphansi kuka-60%, komise ngokugeleza komoya oshisayo ku-130°C kuya ngaphansi kuka-5%. Umsebenzi: ukugcinwa kwamanzi, ukuqina, i-thixotropic anti-sag, ukusebenza kahle komoya, ukusetha okubambezelayo.
Ukugcinwa kwamanzi: Ukugcinwa kwamanzi kuyisici esibaluleke kakhulu se-cellulose ether! Ekukhiqizweni kwe-putty gypsum mortar nezinye izinto, ukusetshenziswa kwe-cellulose ether kubalulekile. Ukugcinwa kwamanzi okuphezulu kungasabela ngokugcwele kumlotha wesamente kanye ne-calcium gypsum (uma ukusabela kuqhubeka ngokugcwele, kulapho amandla eba maningi khona). Ngaphansi kwezimo ezifanayo, lapho i-viscosity ye-cellulose ether iphakama, ukugcinwa kwamanzi kuba ngcono (igebe elingaphezu kwe-100,000 viscosity liyancishiswa); lapho umthamo uphakeme, ukugcinwa kwamanzi kuba ngcono, ngokuvamile inani elincane le-cellulose ether lingathuthukisa kakhulu ukusebenza kwe-mortar. Izinga lokugcinwa kwamanzi, lapho okuqukethwe kufinyelela ezingeni elithile, umkhuba wokwandisa izinga lokugcinwa kwamanzi uba kancane; izinga lokugcinwa kwamanzi le-cellulose ether livame ukwehla lapho izinga lokushisa elizungezile likhuphuka, kodwa amanye ama-high-gel cellulose ethers nawo asebenza kangcono ngaphansi kwezimo zokushisa okuphezulu. Ukugcinwa kwamanzi. Ukuhlangana phakathi kwama-molecule wamanzi nama-cellulose ether molecular chains kwenza ama-molecule wamanzi angene ngaphakathi kwama-cellulose ether macromolecule chains futhi athole amandla aqinile okubopha, ngaleyo ndlela akhe amanzi akhululekile, abambe amanzi, futhi athuthukise ukugcinwa kwamanzi kwe-simende slurry.
Ukuqina, i-thixotropic kanye nokungaguquguquki: kunikeza i-viscosity enhle kakhulu ku-wet mortar! Kungakhulisa kakhulu ukunamathelana phakathi kwe-wet mortar kanye nesendlalelo sesisekelo, futhi kuthuthukise ukusebenza kwe-anti-wagging kwe-mortar. Umphumela wokuqina we-cellulose ethers uphinde wandise ukumelana nokusabalala kanye nokulingana kwezinto ezisanda kuhlanganiswa, ukuvimbela ukwahlukana kwezinto, ukuhlukaniswa kanye nokopha. Umphumela wokuqina we-cellulose ethers ezintweni ezisekelwe kusimende uvela ku-viscosity yezixazululo ze-cellulose ether. Ngaphansi kwezimo ezifanayo, lapho i-viscosity ye-cellulose ether iphakama, i-viscosity yezinto ezisekelwe kusimende eziguquliwe iba ngcono, kodwa uma i-viscosity inkulu kakhulu, izothinta ukugeleza nokusebenza kwezinto (njenge-sticky trowel kanye ne-batch scraper). I-self-leveling mortar kanye ne-self-compact concrete ezidinga ukugeleza okuphezulu zidinga i-viscosity ephansi ye-cellulose ether. Ngaphezu kwalokho, umphumela wokuqina we-cellulose ether uzokwandisa isidingo samanzi sezinto ezisekelwe kusimende futhi wandise isivuno se-mortar. Isixazululo samanzi se-cellulose ether esine-viscosity ephezulu sine-thixotropy ephezulu, okuyisici esiyinhloko se-cellulose ether. Izixazululo zamanzi ze-cellulose ngokuvamile zinezimpawu zokugeleza ze-pseudoplastic, ezingezona ze-thixotropic ngaphansi kokushisa kwazo kwejeli, kodwa izakhiwo zokugeleza ze-Newtonian ngamanani aphansi okushefa. I-Pseudoplasticity iyanda ngokwanda kwesisindo sama-molecule noma ukuhlushwa kwe-cellulose ether. Ama-gel esakhiwo akhiwa lapho izinga lokushisa likhuphuka, futhi kwenzeka ukugeleza okuphezulu kwe-thixotropic. Ama-ether e-cellulose anokuhlushwa okuphezulu kanye ne-viscosity ephansi abonisa i-thixotropy ngisho nangaphansi kokushisa kwejeli. Lesi sici sinenzuzo enkulu ekwakhiweni kwe-mortar yokwakha ukulungisa ukuleveli kwayo kanye nokuwa kwayo. Kufanele kuqashelwe lapha ukuthi lapho i-viscosity ye-cellulose ether iphakeme, kuba ngcono ukugcinwa kwamanzi, kodwa lapho i-viscosity iphakeme, isisindo sama-molecule se-cellulose ether siphakeme, kanye nokwehla okuhambisanayo kokuncibilika kwayo, okunomthelela omubi ekuhlushweni kwe-mortar kanye nokusebenza kahle kwayo.
Imbangela: I-Cellulose ether inomphumela osobala wokungenisa umoya ezintweni ezintsha ezisekelwe kusimende. I-Cellulose ether ineqembu elithanda amanzi (iqembu le-hydroxyl, iqembu le-ether) kanye neqembu elithanda amanzi (iqembu le-methyl, indandatho ye-glucose), iyi-surfactant, inomsebenzi wobuso, ngakho-ke inomphumela wokungenisa umoya. Umphumela wokungenisa umoya we-cellulose ether uzokhiqiza umphumela "webhola", ongathuthukisa ukusebenza kwezinto ezisanda kuhlanganiswa, njengokwandisa i-plasticity kanye nokushelela kwesimende ngesikhathi sokusebenza, okuzuzisa ekugayweni kwesimende; kuzophinde kwandise umkhiqizo wesimende. , kunciphisa izindleko zokukhiqizwa kwesimende; kodwa kuzokhulisa ukugoba kwezinto eziqinile futhi kunciphise izakhiwo zazo zemishini njengamandla kanye ne-elastic modulus. Njenge-surfactant, i-cellulose ether nayo inomphumela wokumanzisa noma wokugcoba ezinhlayiyeni zesimende, okuthi kanye nomphumela wayo wokungenisa umoya kukhulise ukugeleza kwezinto ezisekelwe kusimende, kodwa umphumela wayo wokujiya uzonciphisa ukugeleza. Umphumela wokugeleza uyinhlanganisela yemiphumela yokwenza ipulasitiki kanye nokuqina. Uma okuqukethwe kwe-cellulose ether kuphansi kakhulu, kubonakala kakhulu njengomphumela wokwenza ipulasitiki noma wokunciphisa amanzi; uma okuqukethwe kuphakeme, umphumela wokuqina we-cellulose ether uyanda ngokushesha, futhi umphumela wayo wokungenisa umoya uvame ukugcwala, ngakho-ke ukusebenza kuyakhuphuka. Umphumela wokuqina noma ukwanda kwesidingo samanzi.
Ukuhlehliswa Kwesimo: I-Cellulose ether ingalibazisa inqubo yokumunca usimende. Ama-Cellulose ether anika udoti izakhiwo ezahlukahlukene eziwusizo, futhi anciphise ukukhishwa kokushisa kokuqala kokumunca usimende futhi abambezele inqubo yokumunca usimende. Lokhu akulungile ukusetshenziswa kodoti ezindaweni ezibandayo. Lokhu kuhlehliswa kubangelwa ukumuncwa kwama-molecule e-cellulose ether emikhiqizweni yokumunca efana ne-CSH ne-ca(OH)2. Ngenxa yokwanda kwe-viscosity yesisombululo se-pore, i-cellulose ether inciphisa ukuhamba kwama-ion esixazululweni, ngaleyo ndlela ibambezele inqubo yokumunca. Lapho ukuhlushwa kwe-cellulose ether ezintweni zejeli yamaminerali kuphezulu, kulapho umphumela wokulibaziseka kokumunca ubonakala khona. Ama-Cellulose ether awagcini nje ngokulibazisa ukusetha, kodwa futhi abambezela inqubo yokuqina kohlelo lwe-cement mortar. Umphumela wokulibazisa we-cellulose ether awuxhomekile kuphela ekuhlushweni kwayo ohlelweni lwejeli yamaminerali, kodwa futhi nasekwakhekeni kwamakhemikhali. Lapho izinga le-methylation ye-HEMC liphezulu, kulapho umphumela wokulibazisa we-cellulose ether uba ngcono. Umphumela wokulibazisa uqina kakhulu. Kodwa-ke, i-viscosity ye-cellulose ether ayinawo umthelela omkhulu ekuguqukeni kwe-hydration kwesimende. Ngokwanda kokuqukethwe kwe-cellulose ether, isikhathi sokusetha sesimende sanda kakhulu. Kukhona ubudlelwano obuhle obungaqondile phakathi kwesikhathi sokuqala sokusetha sesimende nokuqukethwe kwe-cellulose ether, futhi isikhathi sokugcina sokusetha sinokuxhumana okuhle okuqondile nokuqukethwe kwe-cellulose ether. Singalawula isikhathi sokusebenza sesimende ngokushintsha okuqukethwe kwe-cellulose ether. Kumkhiqizo, udlala indima yokugcina amanzi, ukuqina, ukubambezela amandla okufuthwa kwesimende, kanye nokuthuthukisa ukusebenza kokwakha. Umthamo omuhle wokugcina amanzi wenza i-cement gypsum ash calcium isabele ngokuphelele, ikhulisa kakhulu i-viscosity emanzi, ithuthukisa amandla okubopha esimende, futhi ngasikhathi sinye ingathuthukisa kahle amandla okudonsa kanye namandla okucheba, ithuthukisa kakhulu umphumela wokwakha kanye nokusebenza kahle komsebenzi. Isikhathi esilungisekayo. Ithuthukisa ukufuthwa noma ukumpompa kwesimende, kanye namandla esakhiwo. Enqubweni yangempela yokufaka, kubalulekile ukunquma uhlobo, i-viscosity, kanye nenani le-cellulose ngokwemikhiqizo ehlukene, imikhuba yokwakha, kanye nendawo ezungezile.
Isikhathi sokuthunyelwe: Novemba-15-2022