Ukugcinwa kwamanzi kwe-hydroxypropyl methylcellulose ether
Ukugcinwa kwamanzi kodaka lwengxube eyomile kubhekisela emandleni odaka lokubamba nokukhiya amanzi. Ukuphakama kwe-viscosity ye-hydroxypropyl methylcellulose ether, kuba ngcono ukugcina amanzi. Ngenxa yokuthi ukwakheka kwe-cellulose kuqukethe amabhondi e-hydroxyl ne-ether, ama-athomu omoya-mpilo ku-hydroxyl kanye namaqembu e-ether bond ahlotshaniswa nama-molecule amanzi ukuze akhe amabhondi e-hydrogen, ukuze amanzi amahhala abe amanzi abophekile futhi athandele amanzi, ngaleyo ndlela abambe iqhaza ekugcineni amanzi.
Ukunyibilika kwe-Hydroxypropyl Methyl Cellulose Ether
1. I-coarse particle cellulose ether kulula ukuyihlakaza emanzini ngaphandle kwe-agglomeration, kodwa izinga lokuchithwa lihamba kancane kakhulu. I-cellulose ether engaphansi kwama-60 mesh ichithwa emanzini cishe imizuzu engama-60.
2. I-fine particle cellulose ether kulula ukuyihlakaza emanzini ngaphandle kwe-agglomeration, futhi izinga lokuchithwa lilinganiselwe. I-cellulose ether engaphezu kuka-80 mesh ichithwa emanzini cishe imizuzu emi-3.
3. I-ultra-fine particle cellulose ether ihlakazeka ngokushesha emanzini, incibilike ngokushesha, futhi yakhe i-viscosity ngokushesha. I-cellulose ether ngenhla kwe-120 mesh incibilika emanzini cishe imizuzwana engu-10-30.
Ukuqina kwezinhlayiya ze-hydroxypropyl methylcellulose ether, kuba ngcono ukugcina amanzi. Ingaphezulu le-coarse-grained cellulose ether liyancibilika ngokushesha ngemva kokuthintana namanzi bese lenza into yejeli. Iglu igoqa izinto ukuvimbela ama-molecule amanzi ukuthi angaqhubeki nokungena. Ngezinye izikhathi ayikwazi ukuhlakazwa ngokufanayo futhi incibilike ngisho nangemva kokunyakaziswa kwesikhathi eside, kwakheka isixazululo esinamafu esine-flocculent noma i-agglomeration. Izinhlayiya ezinhle zihlakazeka futhi zihlakaze ngokushesha ngemva kokuxhumana namanzi ukuze zenze i-viscosity efanayo.
Inani le-PH le-hydroxypropyl methylcellulose ether (ukubuyisela emuva noma umphumela wamandla wangaphambi kwesikhathi)
Inani le-pH labakhiqizi be-ether ye-hydroxypropyl methylcellulose ekhaya naphesheya ngokuyisisekelo lilawulwa cishe ku-7, esesimweni esine-acidic. Ngenxa yokuthi kusekhona inombolo enkulu yezakhiwo zendandatho ye-anhydroglucose esakhiweni samangqamuzana e-cellulose ether, indandatho ye-anhydroglucose yiqembu eliyinhloko elibangela ukukhubazeka kukasimende. Indandatho ye-anhydroglucose ingenza ama-ion e-calcium esixazululweni se-hydration sikasimende akhiqize inhlanganisela yamangqamuzana kashukela-calcium, inciphise ukugcwala kwe-calcium ion ngesikhathi sokufakwa kukasimende, ivimbele ukwakheka nokuna kwe-calcium hydroxide namakristalu kasawoti e-calcium, futhi ibambezele ukugeleza kukasimende. inqubo. Uma inani elingu-PH lisesimweni se-alkaline, udaka luzovela kusimo samandla angaphambi kwesikhathi. Manje izimboni eziningi zisebenzisa i-sodium carbonate ukulungisa inani le-pH. I-Sodium carbonate iwuhlobo lwe-ejenti ebeka ngokushesha. I-sodium carbonate ithuthukisa ukusebenza kobuso bezinhlayiya zikasimende, ikhuthaza ukuhlangana phakathi kwezinhlayiya, futhi ithuthukise ngokwengeziwe i-viscosity yodaka. Ngesikhathi esifanayo, i-sodium carbonate ihlangana ngokushesha nama-calcium ions odakeni ukuze kuthuthukiswe ukwakheka kwe-ettringite, futhi usimende ujiya ngokushesha. Ngakho-ke, inani le-pH kufanele lilungiswe ngokuya ngamakhasimende ahlukene enqubweni yangempela yokukhiqiza.
I-Air Entraining Properties ye-Hydroxypropyl Methyl Cellulose Ether
Umphumela wokungenisa umoya we-hydroxypropyl methylcellulose ether ngokuyinhloko kungenxa yokuthi i-cellulose ether nayo iwuhlobo lwe-surfactant. Umsebenzi ohlangene wobuso we-cellulose ether wenziwa ikakhulukazi kusixhumi esibonakalayo esiqinile se-gas-liquid. Okokuqala, ukwethulwa kwamabhamuza omoya, okulandelwa ukuhlakazeka kanye nomphumela wokumanzisa. I-Cellulose ether iqukethe amaqoqo e-alkyl, anciphisa ngokuphawulekayo ukungezwani kwendawo kanye namandla ahlangana nobuso bamanzi, okwenza kube lula ukukhiqiza amabhamuza amaningi amancane avaliwe ngesikhathi sokunyakaziswa kwesisombululo esinamanzi.
Izakhiwo zeGel zeHydroxypropyl Methyl Cellulose Ether
Ngemuva kokuthi i-hydroxypropyl methylcellulose ether incibilike odakeni, amaqembu e-methoxyl ne-hydroxypropyl eketangeni lamangqamuzana azosabela ngama-ion e-calcium nama-ion e-aluminium ku-slurry ukuze akhe ijeli ye-viscous futhi agcwalise isikhala sikasimende esingenalutho. , ukuthuthukisa ukubumbana kodaka, ukudlala indima yokugcwalisa okuguquguqukayo nokuqinisa. Kodwa-ke, lapho i-matrix eyinhlanganisela ingaphansi kwengcindezi, i-polymer ayikwazi ukudlala indima eqinile yokusekela, ngakho-ke amandla kanye nesilinganiso sokugoqa sodaka siyehla.
Ukwakhiwa Kwefilimu Ye-Hydroxypropyl Methyl Cellulose Ether
Ngemuva kokuthi i-hydroxypropyl methyl cellulose ether yengezwe ukuze kufakwe amanzi, kwakheka ungqimba oluncane lwefilimu ye-latex phakathi kwezinhlayiya zikasimende. Le filimu inomphumela wokuvala futhi ithuthukisa ukoma okungaphezulu kodaka. Ngenxa yokugcinwa kwamanzi okuhle kwe-hydroxypropyl methylcellulose ether, ama-molecule amanzi anele agcinwa ngaphakathi kodaka, ngaleyo ndlela aqinisekise ukuqina kwe-hydration kasimende kanye nokuthuthukiswa okugcwele kwamandla, ukuthuthukisa amandla okubopha odaka, futhi ngesikhathi esifanayo Kuthuthukisa ukuhlangana kodaka, kwenza udaka lube ne-flexible ye-plasticity kanye ne-flexible ye-plasticity kanye nokunciphisa udaka.
Isikhathi sokuthumela: May-23-2023