Umahluko phakathi kokutya kwe-HEAMOOOOOOON NOCWANGCHODI YEMPMC

Ekusebenziseni i-hydroxypropyl methyl seluploseI-HPMC, sihlala sifumanisa ukuba sihlulwe saba ziindidi ezimbini: ukuchitheka kwangoko. Masiqonde umahluko phakathi kokupheliswa okukhawulezayo kunye nokuchitheka okucothayo kwe-hydroxypropy i methyl sethylise.

I-HPMNC ye-I-HPMC ibhekisele ekusetyenzisweni kwe-arhente ye-contre-ross-contriment yonyango lwemveliso, ukuze i-HPMC ingasasazwa ngokukhawuleza emanzini abandayo, kodwa hayi i-veskosity inyuka kancinci, oko kukuthi, ukutshitshiswa

I-HPMC ecothayo ye-HPMC inokubizwa ngokuba yimveliso eshushu. Xa amanzi abandayo ahlangatyezwa, kungasasazeka ngokukhawuleza emanzini ashushu. Ngokuvuselela ngokulinganayo, iqondo lobushushu lesisombululo liya kuhla kubushushu obuthile. (Ubushushu bejeli yethu bumalunga ne-60 ° C), i-vickosity iya kubonakala ngokuthe ngcembe de ijeli ebonakalayo nenamathelayo.

Nanku umahluko phakathi kwesisombululo nesicociweyo. Ukuba unayo nayiphi na imibuzo malunga nolu lwazi, unokunxibelelana nabo.

Hydroxypropyl methyl seluplose HPMC

Ukongeza i-hydroxypropyl methyl secelose ukuya kwisamente kunciphisa i-hydration. Ke uyazi ntoni malunga nendlela esebenza ngayo? Makhe sijonge i-hydroxylypropyl methyl seluplose yokulibazisa umbuso we-qumes. Umgaqo.

I-1. I-ion yokuhamba-i-ion ye-hypothesis

Siyikhuphele le qhypypropyl methyl sellisey yayiya kwandisa ukubonakala kwezisombululo ze-Pore, thintela inqanaba le-Ionic, kwaye lilibazisa i-qudration yesamente. Nangona kunjalo, i-vissofity esezantsi yeselula kolu vavanyo yayinamandla omeleleyo ukulibazisa i-qumed hydration. Ke ngoko, le meko ayisebenzi. I-Pourchez et al. Uyayithandabuza le nto ihanahisi. Ngapha koko, ixesha lokufuduka kwe-ion okanye ukufuduka lifutshane kakhulu, kuyacaca ukuba alifani nokulibaziseka kwesamente yesamente.

I-2. I-Alkaline Demodition

I-Polysactoides incinci ngokulula phantsi kweemeko ze-alkaline ukuvelisa i-hydroxyl carboxlic acids i-Comet Hydration. Therefore, the delayed hydration of hydroxypropyl methyl cellulose may be due to its degradation in alkaline cement slurries to form hydroxycarboxylic acids. Nangona kunjalo, i-Purchez et al. ifumanise ukuba i-Selese isel yayizinzile kakhulu phantsi kweemeko ze-ALKALIIN, ihlazo kuphela kancinci, kwaye iimveliso zokuphelisa zazinempembelelo encinci ekulibaziseni i-hydration yesamente.

I-3, i-adsorption

I-adsorvoy inokuba yi-hydroxypropyl methyl seluplose ibhloko ye-ceruperation yesona sizathu sezinto eziphilayo kukuba iimveliso ze-cerment ziya kulibazisa i-hydration kunye ne-quanceds. I-Pourchez et al. ifumanise ukuba i-Selessese e-Seles i-adress i-adred kwi-hlumes yemveliso ye-calcium, i-csh gel kunye ne-calcium allrate hydrate, kodwa ayisebenzi kakuhle. Ngapha koko, kwimeko ye-seluplose i-ether, isikhundla se-adsorction sehec somelele kunoko sidumbileyo mc mc. Iphantsi komxholo we-hydroxyyteethyl kwi-hec okanye i-hydroxypropy e-HPMC, eyomeleleyo ye-adsorction: njengemveliso ye-hydime, umthamo we-Calcium hydroxide womelele kunaleyo ye-CSH. Uhlalutyo oluqhubekayo lubonisa ukuba umthamo we-adserction weemveliso ze-hydication kunye ne-etelulose Ether ihambelana nokulibaziseka, kodwa kucacile ukuba i-adsorction ye-ether ibuthathaka, kodwa oku kulibaziseka kakhulu. I-selsulose ether ye-Trilicate kunye neemveliso zayo zokuhamba-mbambano zine-adsorction yenqanaba lesigaba, kodwa ukulibaziseka kwe-ETTririte ichaphazeleke yi-CA 2 + isandiso kwisisombululo se-iluplose. I-hidrade iqhubekile.

Le yi-hydroxypropyl Methyl Sinethemba lokuba olu lwazi luya kwenza ukuba wonke umntu aqonde ukuba isebenza njani kwaye isebenzise ngcono.