Kusiyana pakati pa kusungunuka nthawi yomweyo komanso pang'onopang'ono kusinthika kwa HPMC

Pogwiritsa ntchito hydroxypropyl methyl celluloseHpmc, nthawi zambiri timawona kuti ndizosagawanika m'magulu awiri: kusinthika mwachangu komanso pang'onopang'ono. Tiyeni timvetsetse kusiyana pakati pa kuwonongeka kofulumira komanso kusungunuka pang'onopang'ono kwa hydroxypropyl methy cellose.

Nthawi yomweyo HPMC imatanthauza kugwiritsa ntchito mankhwala othandizira pamtanda pazinthu zopangira, kuti HPMC itha kubalalitsidwa mwachangu m'madzi ozizira, koma osati yankho lenileni, osagwirizana, ndiye kuti, "

Slod Hopmc imatha kutchedwa otentha amasungunuka. Madzi ozizira atakumana nawo, amatha kubalalitsidwa mwachangu m'madzi otentha. Mwakudzudzulitsa ngakhale kuti, kutentha kwa yankho kumatsika mpaka kutentha kwinakwake. .

Nayi kusiyana pakati pa yankho lapafupi ndi yankho losachedwa. Ngati muli ndi mafunso okhudza chidziwitso ichi, mutha kufunsa.

Hydroxypropyl methl cellulose hpmc dlament hydration

Kuonjezera hydroxypropyl methl cellulose ku simenti kumachepetsa mphamvu. Ndiye mukudziwa chiyani za momwe zimagwirira ntchito? Tiyeni tiwone pa hydroxypropyl methl cellulose kuti mumvetsetsere makhoma. Mfundo.

1. Matenda a ION

Tinkachita nkhanza kuti hydroxypropyl methl cellulose imatha kuwonjezera mafayilo a mayankho a Core, kulepheretsa kuchuluka kwa mayendedwe a ionic, ndikuchedwetsa hydrade ya simenti. Komabe, kutsika kwapafupi kwa cellulose komwe kumachitika muyesowu kunatha kumvetsetsa bwino simenti hydration. Chifukwa chake, lingaliro ili silovomerezeka. Thiraninso al. Komanso kukayikira izi. M'malo mwake, nthawi ya ion yosamukira kapena kusamukirako ndiyofupikirapo, mosawoneka ngati yosatheka pakuchedwa kwa simenti hydration.

2. Kuwonongeka kwa alkaline

Polysaccharides mosavuta kuwonongeka pansi pa alkaline mikhalidwe kuti apange hydroxyl carboxylic acid omwe amachedwa sinti. Chifukwa chake, kuchedwa hydroction ya hydroxypypyl methyl cellulose kungakhale chifukwa cha kuwonongeka kwake mu ma cemed simenti kuti apange ma acid a acid. Komabe, kutsanulira kutsanuna. Anapeza kuti cellulose anali okhazikika kwambiri pansi pa mikhalidwe ya alkaline, yochepetsedwa yokha pang'ono, ndipo zonyansa sizinapangitse kuchepa pang'ono pa simenti hydration.

3, Adsorption

Adsorption ikhoza kukhala hydroxypropyl methy celmerose block steverasi chifukwa chenicheni chimakhala ndi ma cementic tinthu tambiri ndi ma cell. Thiraninso al. Anapeza kuti cellulose eddbed odekha pamasamba opatsa mphamvu monga calcium hydroxide, chsh gel wa calkium ndi caltium yonyansa ndi magawo osakhalitsa. Kuphatikiza apo, pankhani ya ether ether, ma adsorraption kuchuluka kwa Hec ndimphamvu kuposa yotupa MC. M'munsi zomwe zili hydroxyethyl mu hec kapena hydroxypropyl mu hpmc, mphamvu ya ma hydrorption: Kuchuluka kwa ma hydration, madsorraption a calcium hydroxide kuposa a CRDROX. Kusanthula kwina kumawonetsanso kuti makonda azomera hydrate ndi ma cellulose akukhudzana ndi kuchedwa kwa simelorption, koma mapangidwe ake, koma izi zimachedwa kwambiri. cellulose ethercium sluaterium ndi zinthu za hydrate, zimazengereza kuchuluka kwa studite, chifukwa cha kuchedwa kwa ettingite ndizotsika kwambiri, koma osamala ndi CE 2 + yothetsera vutoli, ether ether. Mafuta opusa amapitilirabe.

Awa ndi hydroxypropyl meth cellulose kuchedwetsa mtima kwa simenti hydracle. Tikukhulupirira kuti chidziwitsochi chithandiza aliyense kumvetsetsa momwe malonda amathandizira ndikugwiritsa ntchito bwino.