Hydroxypropyl methyl cellulose (hpmc)amagwiritsidwa ntchito kawirikawiri pa cellulose ether, yomwe imagwiritsidwa ntchito kwambiri pazomangira, zokutira, mankhwala ndi chakudya. Mu zomangira zomangira za CELON, hpmc, monga modzima, nthawi zambiri zimawonjezeredwa ku matope a simenti kuti athandize magwiridwe ake, makamaka mu ntchito yomanga ndi kugwiritsa ntchito. Zimakhala ndi vuto lalikulu pamtsinje, kusungidwa kwamadzi, kugwirizira kwamadzi komanso kusokonekera kwa matope.

 

1. Zotsatira za HPMC pa madzi amtundu wa simenti
Madzi a matope a simenti ndi chizindikiro chofunikira kuti ayeze magwiridwe ake, omwe amakhudza mwamphamvu zomangamanga ndi mtundu wabwino. Monga zinthu za polymer, hpmc zimakhala ndi madzi abwino ndikuyenda. Atawonjezeredwa ku matope a simenti, imatha kupanga filimu yopyapyala kudzera pazakudya zolumikizirana, onjezani matope a matope, ndikuwongolera madzi ndi kuthekera kwa matope. Makamaka, hpmc imatha kusintha mosavuta za matope, ndikupangitsa kuti ikhale yosavuta kugwiritsira ntchito ngakhale kulowererapo pomanga matongosolo, kupewa zovuta zomanga, zomwe zimayambitsidwa chifukwa choyanika kwa matope.

HPMC imatha kukulitsa nthawi yotseguka ya matope, ndiye kuti, kuwonjezera nthawi yogwiritsa ntchito matope pomanga, ndikupewa kumanga kwamphamvu kwambiri kwa madzi, makamaka kutentha kwambiri ndi malo owuma.

 

2. Mphamvu ya hpmc pa madzi osungira matope a simenti
Kusunga kwamadzi kwa matope ndi kofunikira pakuumitsa ndikukula kwake. Popeza njira yotsatsira ma simenti imafunikira madzi okwanira, ngati kutayika kwa madzi kuthyathyathya kumatha mwachangu kwambiri ndipo simenti hydration sikukwanira, kumakhudza mwachindunji mphamvu komaliza ndi kukhazikika kwa matope. HPMC imatha kusintha bwino madzi osungira matope. Magulu a hydroxypropyl ndi methyl omwe ali mu mawonekedwe ake a molecular amakhala ndi hydrophilicity, omwe amatha kupanga yunifolomu yamadzi yopanda matope ndikuchepetsa kuchuluka kwa madzi.

Makamaka kutentha kwambiri ndi matope otsika, kuwonjezera kwa HPMC kumatha kuchepetsa kwambiri kuyanika kwa matope a simenti, onetsetsani kuti simenti yokwanira ya simenti, ndikuwonetsetsa kuti simenti yomaliza, ndikusintha mphamvu ya matope. Kafukufuku wawonetsa kuti mphamvu yovuta komanso yolimba ya matope ndi kuchuluka kwa hpmc yoyenera nthawi zambiri kuposa omwe alibe HPMC pakulimbana kwakanthawi.

 

3. Mphamvu ya HPMC pa kukana kwa matope a simenti
Ming'alu ndi vuto lofala lomwe limakhudza matope a simenti, makamaka mothandizidwa ndi zinthu monga kuyanika, kusintha kwa kutentha, matope amawoneka ming'alu. Kuphatikiza kwa HPMC kumatha kusintha mogwirizana ndi matope a matope, makamaka kudzera muzinthu zotsatirazi:

Sinthani kuchuluka kwa matope ndi matope a matope: hpmc ali ndi zotupa komanso pulasitiki, zomwe zimathetsa nkhawa zomwe zimachitika chifukwa chopukusa nthawi yochizira matope.
Onjezani zotsatsa komanso mphamvu ya matumbo a matope: hpmc imatha kukulitsa mphamvu ndi mphamvu ya matumbo, makamaka ngati gawo lapansi limakhala losatalikirana kapena gawo lapansi.
Lambulani kuchuluka kwa simenti: Mwa kuwongolera simenti hydraction hydraction, hpmc amatha kuchedwetsa madzi ambiri mu simenti ndikuchepetsa nkhawa zamadzi mwachangu, potero zimalepheretsa kupezeka kwa ming'alu.

 

4. Zotsatira za HPMC pa mphamvu ndi zokhazikika za matope a simenti
Ngakhale kukonza kugwirira ntchito ndi kupindika kukana kwa simenti ya simenti, HPMC imakhudzanso mphamvu ndi kulimba. Ngakhale kuwonjezera kwa HPMC kumachepetsa kwambiri mphamvu yoyambirira ya matope chifukwa kayendedwe kake kakhalidwe kamene kamapezeka gawo lamadzi ofunikira, potengera kulimba mtima kwa matope.

Kuphatikiza apo, HPMC imatha kusintha matope a simenti, kuchepetsa kukokoloka kwa matope ndi madzi kapena mankhwala, ndikuwonjezera kulimba kwake. Izi zimapangitsa matope ndi hpmc kuwonjezeredwa kukhala ndi nthawi yayitali m'malo onyowa kapena onyowa, makamaka oyenera kukhoma lakunja, pansi ndi minda ina.

 

5. Zothandiza za HPMC mu zinthu zomangamanga za simenti
Ndi kufunikira kwake kwa matope oyendetsa bwino kwambiri m'malo omanga, hpmc, monga owonjezera othandiza, awonetsa chiyembekezo chothandiza pomanga zida zomangira za simenti. Kuphatikiza pa ntchito zachikhalidwe monga khoma lopaka ndi matope ofunda, hpmc amathanso kugwiritsidwa ntchito matope odzilimbitsa okha, kukonza matope, matope osakanizika ndi zinthu zina kuti apititse patsogolo matope athunthu.

Ndi kusintha kwa zofunikira zotetezera zachilengedwe ndikukhazikika, kuwonongeka kotsika komanso kutsika kwamphamvu (kosasunthika kwa ortic) kumapangitsa kuti ikhale ndi mwayi wogwiritsa ntchito zomangamanga. Nthawi yomweyo, poyambitsa matekinoloje okhudzana, kusinthidwa ndi kugwiritsa ntchito mafomu a HPMC kudzakhala osiyanasiyana, ndikupatsa mwayi wopeza zopangidwa ndi zida zomangira za simenti.

 

Monga matope osinthika a simenti, hydroxypropyl methylcellulose (hpmc) amachiritsa magwiridwe antchito a simenti posintha madzi, kusungidwa kwamadzi, kukana matope ndi nyongolotsi. Ndi kusintha mosalekeza kwa zomangamanga zofunika, kuchuluka kwa HPMC kudzakulitsidwanso, kukhala imodzi mwazinthu zazikulu pakulimbikitsa chitukuko cha zinthu zamakono zomanga.