1. Izici ze-HPMC kudaka olujwayelekile
I-HPMC isetshenziswa kakhulu njenge-retarder kanye ne-ejenti yokugcina amanzi ekulinganiseni usimende. Ezingxenyeni zikakhonkolo nodaka, ingathuthukisa i-viscosity kanye nezinga lokuncipha, iqinise amandla ahlangene, ilawule isikhathi sokumisa usimende, futhi ithuthukise amandla okuqala namandla okugoba amile. Ngenxa yokuthi inomsebenzi wokugcina amanzi, inganciphisa ukulahlekelwa kwamanzi endaweni ekhonkolo, igweme imifantu emaphethelweni, futhi ithuthukise ukunamathela nokusebenza kokwakha. Ikakhulukazi ekwakhiweni, isikhathi sokumisa singanwetshwa futhi silungiswe. Ngokukhuphuka kokuqukethwe kwe-HPMC, isikhathi sokusetha sodaka sizonwetshwa ngokulandelana; thuthukisa umshini nokudonsa, ofanele ukwakhiwa kwemishini; thuthukisa ukusebenza kahle kokwakhiwa futhi kusizakale indawo yokwakha Ivikela isimo sezulu sikasawoti oncibilikayo emanzini.
2. Izici ze-HPMC kudaka olukhethekile
I-HPMC iyi-ejenti yokugcina amanzi esebenza kahle kakhulu ye-powder mortar eyomile, enciphisa izinga lokuphuma kwegazi kanye ne-delamination yodaka futhi ithuthukise ukuhlangana kodaka. Nakuba i-HPMC inciphisa kancane amandla aguquguqukayo kanye namandla acindezelayo odaka, ingakhuphula kakhulu amandla aqinile namandla ebhondi odaka. Ngaphezu kwalokho, i-HPMC ingavimbela ngokuphumelelayo ukwakheka kwemifantu yepulasitiki odakeni futhi inciphise inkomba yokuqhekeka kwepulasitiki yodaka. Ukugcinwa kwamanzi kodaka kukhuphuka ngokukhula kwe-viscosity ye-HPMC, futhi lapho i-viscosity idlula i-100000mPa·s, ukugcinwa kwamanzi akukhuphuki kakhulu. Ukucoleka kwe-HPMC nakho kunomthelela othile kuzinga lokugcinwa kwamanzi odaka. Lapho izinhlayiya zicolekile, izinga lokugcinwa kwamanzi odaka liyathuthukiswa. Usayizi wezinhlayiyana ze-HPMC ngokuvamile osetshenziselwa udaka lukasimende kufanele ube ngaphansi kwama-microns angu-180 (isikrini semeshi esingu-80). Umthamo ofanelekile we-HPMC odakeni lwempuphu owomile ngu-1 ‰～3‰.
2.1. Ngemuva kokuthi i-HPMC esesimende ichitheke emanzini, ukusatshalaliswa okusebenzayo nokufana okufanayo kwezinto zikasimende ohlelweni kuqinisekiswa ngenxa yomsebenzi ongaphezulu. Njenge-colloid evikelayo, i-HPMC "igoqa" izinhlayiya eziqinile futhi yakhe ungqimba endaweni yayo yangaphandle. Isendlalelo sefilimu yokugcoba senza uhlelo lodaka luzinze, futhi luphinde luthuthukise ukugeleza kodaka ngesikhathi sokuxuba kanye nokushelela kokwakhiwa.
2.2. Ngenxa yesakhiwo saso samangqamuzana, isixazululo se-HPMC senza amanzi asesimendeni angabi lula ukulahlekelwa, futhi siwakhulula kancane kancane isikhathi eside, enikeza udaka ngokugcinwa kahle kwamanzi nokwakhiwa. Kungavimbela amanzi ukuba ageleze ngokushesha ukusuka odakeni kuya esisekelweni, ukuze amanzi agcinwe ehlala phezu kwezinto ezintsha, ezingakhuthaza ukugeleza kwe-samente futhi kuthuthukise amandla okugcina. Ikakhulukazi uma isixhumi esibonakalayo esithinta udaka lukasimende, ukhonkolo, nokunamathisela silahlekelwa amanzi, le ngxenye ngeke ibe namandla futhi icishe ingabi namandla okuhlangana. Ngokuvamile, izindawo ezixhumene nalezi zinto zonke zingama-adsorbents, kancane kancane zimunca amanzi athile ukusuka phezulu, okuholela ekungangeni kwamanzi okungaphelele kwale ngxenye, okwenza udaka lukasimende namathayili e-ceramic kanye namathayili e-ceramic noma ukhonkolo nezindonga Amandla okubopha phakathi izindawo ezingaphezulu ziyancipha.
Ekulungiseni udaka, ukugcinwa kwamanzi kwe-HPMC kuwumsebenzi oyinhloko. Kufakazelwe ukuthi ukugcinwa kwamanzi kungaba phezulu ku-95%. Ukwanda kwesisindo samangqamuzana e-HPMC kanye nokwanda kwenani likasimende kuzothuthukisa ukugcinwa kwamanzi namandla ebhondi odaka.
Isibonelo: Njengoba izinamathiselo zamathayili kufanele zibe namandla esibopho esiphezulu kokubili phakathi kwe-substrate nama-tile, okunamathelayo kuthinteka ekukhangiseni kwamanzi emithonjeni emibili; indawo engaphansi (udonga) namathayili. Ikakhulukazi kuma-tile, ikhwalithi iyahlukahluka kakhulu, amanye anezimbotshana ezinkulu, futhi amathayili anezinga eliphakeme lokumuncwa kwamanzi, elibhubhisa ukusebenza kokubopha. I-ejenti egcina amanzi ibaluleke kakhulu, futhi ukwengeza i-HPMC kungahlangabezana kahle nale mfuneko.
2.3. I-HPMC izinzile ku-asidi ne-alkali, futhi isixazululo sayo esinamanzi sizinze kakhulu kububanzi be-pH=2~12. I-Caustic soda namanzi e-lime anethonya elincane ekusebenzeni kwawo, kodwa i-alkali ingasheshisa ukuchithwa kwayo futhi ikhulise kancane i-viscosity yayo.
2.4. Ukusebenza kokwakhiwa kodaka olwengezwe ne-HPMC kwenziwe ngcono kakhulu. Udaka lubonakala "lunamafutha", olungenza amalunga odonga agcwale, abushelelezi ubuso, enze i-tile noma isitini kanye ne-base layer bond ngokuqinile, futhi ingandisa isikhathi sokusebenza, esifanele ukwakhiwa kweNdawo enkulu.
2.5. I-HPMC i-electrolyte engeyona i-ionic futhi engeyona i-polymeric, ezinzile kakhulu ezixazululweni ezinamanzi ezinosawoti wensimbi nama-electrolyte ephilayo, futhi ingangezwa ezintweni zokwakha isikhathi eside ukuze kuqinisekiswe ukuqina kwayo kuyathuthukiswa.
Isikhathi sokuthumela: Jan-10-2023