Uhlolojikelele: olubizwa nge-HPMC, i-fibrous emhlophe noma emhlophe noma impushana eyimbudumbudu.Kunezinhlobo eziningi ze-cellulose futhi zisetshenziswa kabanzi, kodwa ikakhulukazi sithintana namakhasimende embonini yezinto zokwakha ezimpuphu ezomile.I-cellulose evame kakhulu ibhekisela ku-hypromellose.
Inqubo yokukhiqiza: Izinto zokusetshenziswa eziyinhloko ze-HPMC: ukotini ocolisisiwe, i-methyl chloride, i-propylene oxide, ezinye izinto zokusetshenziswa zihlanganisa i-alkali ye-flake, i-asidi, i-toluene, i-isopropanol, njll. Phatha i-cellulose kakotini ecolisisiwe ngesisombululo se-alkali ku-35-40 ℃ isigamu sehora. ihora, cindezela, hlikihla i-cellulose, futhi ukhule ngokufanele ku-35℃, ukuze izinga elimaphakathi le-polymerization le-alkali fiber lingaphakathi kwebanga elidingekayo.Faka imicu ye-alkali eketelani le-etherification, engeza i-propylene oxide ne-methyl chloride ngokushintshana, bese u-etherify ku-50-80 °C amahora angu-5, ngokucindezela okukhulu okungaba ngu-1.8 MPa.Bese wengeza inani elifanele le-hydrochloric acid ne-oxalic acid emanzini ashisayo ku-90 °C ukuze ugeze okokusebenza ukuze unwebe ivolumu.Dehydrate nge-centrifuge.Geza kuze kube yilapho ungathathi hlangothi, futhi uma okuqukethwe komswakama kumpahla kungaphansi kuka-60%, yomise ngokugeleza komoya oshisayo ku-130 ° C kuya ngaphansi kuka-5%.Umsebenzi: ukugcinwa kwamanzi, ukujiya, i-thixotropic anti-sag, ukusebenza kokungenisa umoya, ukulungiselelwa kokuhlehlisa.
Ukugcinwa kwamanzi: Ukugcinwa kwamanzi kuyimpahla ebaluleke kakhulu ye-cellulose ether!Ekukhiqizeni i-putty gypsum mortar nezinye izinto, ukusetshenziswa kwe-cellulose ether kubalulekile.Ukugcinwa kwamanzi okuphezulu kungasabela ngokugcwele umlotha usimende kanye ne-calcium gypsum (lapho ukusabela ngokugcwele, amandla amakhulu).Ngaphansi kwezimo ezifanayo, ukuphakama kwe-viscosity ye-cellulose ether, ukugcinwa kwamanzi kangcono (igebe elingaphezu kwe-100,000 viscosity liyancipha);uma umthamo uphezulu, ukugcinwa kwamanzi kangcono, ngokuvamile inani elincane le-cellulose ether lingathuthukisa kakhulu ukusebenza kodaka.Izinga lokugcinwa kwamanzi, lapho okuqukethwe kufinyelela izinga elithile, inkambiso yokwenyuka kwezinga lokugcina amanzi iba kancane;izinga lokugcinwa kwamanzi le-cellulose ether ngokuvamile liyehla lapho izinga lokushisa lendawo likhuphuka, kodwa amanye ama-cellulose ether e-high-gel nawo asebenza kangcono ngaphansi kwezimo zokushisa eziphezulu.Ukugcinwa kwamanzi.Ukuxubana phakathi kwama-molecule amanzi namaketanga e-cellulose ether yamangqamuzana kwenza ama-molecule amanzi angene ngaphakathi kwamaketanga e-cellulose ether macromolecular futhi athole amandla aqinile okubopha, ngaleyo ndlela akhe amanzi amahhala, athandele amanzi, futhi athuthukise nokugcinwa kwamanzi odaka lukasimende.
Ukuqina, i-thixotropic kanye ne-anti-sag: inika i-viscosity enhle kakhulu odakeni olumanzi!Ingakhuphula ngokuphawulekayo ukunamathela phakathi kodaka olumanzi kanye nongqimba oluyisisekelo, futhi ithuthukise ukusebenza kodaka lokulwa nokuncibilika.Umthelela wokujiya we-cellulose ethers futhi ukhulisa ukumelana nokuhlakazeka kanye ne-homogeneity yezinto ezisanda kuxutshwa, ukuvimbela ukuhlukaniswa kwezinto, ukuhlukaniswa nokopha.Ukuqina komphumela we-cellulose ethers ezintweni ezisekelwe kusimende uvela ku-viscosity yezixazululo ze-cellulose ether.Ngaphansi kwezimo ezifanayo, ukuphakama kwe-viscosity ye-cellulose ether, kuba ngcono i-viscosity yezinto ezisekelwe kusimende ezishintshiwe, kodwa uma i-viscosity inkulu kakhulu, izophazamisa uketshezi nokusebenza kwempahla (njenge-trowel enamathelayo nenqwaba. scraper).kanzima).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.Isixazululo esinamanzi se-viscosity cellulose ether sine-thixotropy ephezulu, ephinde ibe yisici esikhulu se-cellulose ether.Izixazululo ezinamanzi ze-cellulose ngokuvamile zinezindawo zokugeleza ze-pseudoplastic, ezingezona ze-thixotropic ngaphansi kwezinga lokushisa lejeli, kodwa izakhiwo zokugeleza kwe-Newtonian ngamanani aphansi e-shear.I-Pseudoplasticity iyanda ngokukhula kwesisindo samangqamuzana noma ukugcwala kwe-cellulose ether.Ama-gel esakhiwo akhiwa lapho izinga lokushisa likhuphuka, futhi ukugeleza okuphezulu kwe-thixotropic kwenzeka.Ama-cellulose ethers anokugxila okuphezulu kanye ne-viscosity ephansi abonisa i-thixotropy ngisho nangaphansi kwezinga lokushisa lejeli.Lesi sakhiwo sizuzisa kakhulu ekwakhiweni kodaka lokwakha ukuze kulungiswe izinga nokucwila kwalo.Kumele kuqashelwe lapha ukuthi ukuphakama kwe-viscosity ye-cellulose ether, ukugcinwa kwamanzi kangcono, kodwa ukuphakama kwe-viscosity, ukuphakama kwesisindo samangqamuzana e-cellulose ether, kanye nokwehla okuhambisanayo kokuncibilika kwayo, okunegegative. umthelela ekugxilweni kodaka nokusebenza.
Imbangela: I-Cellulose ether inomphumela osobala wokufaka umoya ezintweni ezintsha ezenziwe usimende.I-Cellulose ether inakho kokubili iqembu le-hydrophilic (iqembu le-hydroxyl, i-ether group) kanye neqembu le-hydrophobic (iqembu le-methyl, iringi ye-glucose), i-surfactant, inomsebenzi ongaphezulu, futhi ngaleyo ndlela inomphumela wokungenisa umoya.Umphumela wokungenisa umoya we-cellulose ether uzoveza umphumela "webhola", ongathuthukisa ukusebenza kwezinto ezisanda kuhlanganiswa, njengokwandisa ipulasitiki kanye nokushelela kodaka ngesikhathi sokusebenza, okuzuzisa ukugandaywa kodaka. ;kuzophinde kwandise ukuphuma kodaka., ukunciphisa izindleko zokukhiqiza udaka;kodwa izokwandisa i-porosity yezinto eziqinile futhi inciphise izakhiwo zayo 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 wokugeleza uyinhlanganisela ye-plasticizing kanye nemiphumela yokuqina.Uma okuqukethwe kwe-cellulose ether kuphansi kakhulu, kubonakala ngokuyinhloko njenge-plasticizing noma umphumela wokunciphisa amanzi;lapho okuqukethwe kuphezulu, umphumela wokujiya we-cellulose ether ukhula ngokushesha, futhi umphumela wawo wokungenisa umoya uvame ukugcwala, ngakho ukusebenza kuyanda.Ukuqina komphumela noma ukwanda kwesidingo samanzi.
Ukusetha ukubambezeleka: I-Cellulose ether ingabambezela inqubo yokugeleza kukasimende.Ama-cellulose ether anika udaka ngezinto ezihlukahlukene ezizuzisayo, futhi anciphisa nokukhishwa kokushisa kwe-hydration kwasekuqaleni kukasimende futhi abambezele inqubo ye-hydration kinetic kasimende.Lokhu akulungile ekusebenziseni udaka ezindaweni ezibandayo.Lokhu kuncipha kubangelwa ukufakwa kwama-molecule e-cellulose ether emikhiqizweni ye-hydration 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 ye-hydration.Uma uphezulu ukugcwala kwe-cellulose ether kujeli yamaminerali, kulapho ubonakala khona umphumela wokubambezeleka kokufakwa kwamanzi.Ama-cellulose ether awagcini nje ngokuhlehlisa ukusetha, kodwa futhi abambezela inqubo yokuqina yohlelo lodaka lukasimende.Umphumela wokuvinjelwa kwe-cellulose ether awuncikile kuphela ekugxilweni kwayo ohlelweni lwejeli yamaminerali, kodwa futhi nesakhiwo samakhemikhali.Ukuphakama kwezinga le-methylation ye-HEMC, kuba ngcono umphumela wokuvinjelwa kwe-cellulose ether.Umphumela wokuvinjelwa unamandla.Nokho, i-viscosity ye-cellulose ether ayinawo umthelela omncane ku-hydration kinetics kasimende.Ngokukhula kokuqukethwe kwe-cellulose ether, isikhathi sokusetha sodaka sikhula kakhulu.Kukhona ukuhlobana okuhle okungekona umugqa phakathi kwesikhathi sokuqala sokusetha sodaka nokuqukethwe kwe-cellulose ether, futhi isikhathi sokusetha sokugcina sinokuhlobana okuhle komugqa nokuqukethwe kwe-cellulose ether.Singakwazi ukulawula isikhathi sokusebenza sodaka ngokushintsha okuqukethwe kwe-cellulose ether.Emkhiqizweni, idlala indima yokugcina amanzi, ukuqina, ukubambezeleka kwamandla kasimende, kanye nokwenza ngcono ukusebenza kokwakhiwa.Umthamo omuhle wokugcina amanzi wenza usimende we-gypsum ash calcium usabele ngokuphelele, ukhuphula kakhulu i-viscosity emanzi, uthuthukisa amandla esibopho sodaka, futhi ngesikhathi esifanayo ungathuthukisa kahle amandla aqinile namandla okugunda, uthuthukise kakhulu umphumela wokwakha nokusebenza kahle komsebenzi.Isikhathi esingalungiseka.Ithuthukisa isifutho noma ukudonsa kodaka, kanye namandla esakhiwo.Enqubweni yangempela yokufaka isicelo, kuyadingeka ukunquma uhlobo, i-viscosity, kanye nenani le-cellulose ngokuya ngemikhiqizo ehlukene, imikhuba yokwakha, kanye nemvelo.
Isikhathi sokuthumela: Nov-15-2022