I-Hydroxypropyl methyl cellulose
Ukuseta uvavanyo lwexesha
Ixesha lokuseta ikhonkrithi linxulumene kakhulu nexesha lokuseta isamente, impembelelo ehlanganisiweyo ayinkulu, ngoko ke ixesha lokuseta i-mortar lingasetyenziswa endaweni yokufunda i-HPMC yexesha lokuseta ikhonkrithi engasasazekiyo phantsi kwamanzi, impembelelo yomxube ngenxa yexesha lokuseta ngumlinganiselo wamanzi nesamente yodaka, impembelelo yomlinganiselo wesanti yesamente, ngoko ke ukuze kuvavanywe impembelelo ye-HPMC kwixesha lokuseta i-mortar, umlinganiselo wamanzi nesamente kunye nomlinganiselo wesanti nesanti yodaka kufuneka ulungiswe.
I-HPMC sisakhiwo esithe nkqo se-macromolecule, esineqela le-hydroxyl kwiqela elisebenzayo, elinokwenza iibhondi ze-hydrogen kunye neemolekyuli zamanzi ezixutywayo kwaye lonyuse i-viscosity yamanzi axutywayo. Iintambo ezinde ze-HPMC ziya kutsalana, ukuze iimolekyuli ze-HPMC zidibane ukuze zenze isakhiwo senethiwekhi, isamente, amanzi axutywayo asongiweyo. Ngenxa yokuba i-HPMC yenza isakhiwo senethiwekhi esifana nefilimu encinci kunye nesiphumo sokusonga sesamente, iya kuthintela ngempumelelo ukufuma komswakama kwi-mortar, ithintele okanye inciphise izinga lokufuma kwesamente.
Uvavanyo lokuchitha amanzi
Imeko yokopha kwamanzi kwi-mortar ifana neyekhonkrithi, eya kubangela ukuhlala okunzulu, ikhokelele ekwandeni komlinganiselo wamanzi nesamente kumaleko aphezulu e-slurry, kwaye yenze umaleko ophezulu we-slurry ube nokuncipha okukhulu kweplastiki okanye ukuqhekeka kwinqanaba lokuqala, kwaye amandla omama ongaphezulu e-slurry abuthathaka. Ukusuka kuvavanyo, kunokubonwa ukuba xa isixa sokuxuba singaphezulu kwe-0.5%, akukho nto iyenzekayo xa kuvuza amanzi. Oku kungenxa yokuba xaI-HPMCXa ixutywe kwi-mortar, i-HPMC inokwakheka kwefilimu kunye nesakhiwo senethiwekhi, kunye nokufunxwa kwe-hydroxyl kwikhonkco elide lee-macromolecules, ukuze isamente kwi-mortar kunye namanzi axutyiweyo enze i-flocculation, ukuqinisekisa ulwakhiwo oluzinzileyo lomzimba we-mortar. Emva kokongeza i-HPMC kwi-mortar kwakhona, kuya kwenziwa amaqamza amancinci amaninzi azimeleyo. La maqamza aya kusasazwa ngokulinganayo kwi-mortar kwaye athintele ukufakwa kwe-aggregate. Ukusebenza kobugcisa kwe-HPMC kwezixhobo ezisekwe kwi-samente kunempembelelo enkulu, edla ngokusetyenziswa ukulungiselela ezifana ne-mortar eyomileyo, i-polymer mortar kunye nezinye izinto ezintsha ezidityanisiweyo ezisekwe kwi-samente, ukuze ibe nokugcinwa kwamanzi okuhle, i-plasticity.
Ixesha leposi: Epreli-26-2024