HPMC ya Dry Mixed matope

Makhalidwe a HPMC mu matope osakaniza owuma

1, HPMC mu makhalidwe a matope wamba

HPMC imagwiritsidwa ntchito kwambiri ngati retarder ndi madzi posungira mu chiŵerengero cha simenti.M'zigawo za konkire ndi matope, zimatha kupititsa patsogolo kukhuthala ndi kuchepa kwa mphamvu, kulimbitsa mphamvu zomangira, kulamulira nthawi yoyika simenti, ndi kupititsa patsogolo mphamvu zoyamba ndi mphamvu zokhazikika.Chifukwa ali ndi ntchito yosungiramo madzi, amatha kuchepetsa kutaya kwa madzi pamwamba pa coagulation, akhoza kupeŵa kuchitika kwa ming'alu m'mphepete mwake, ndipo amatha kupititsa patsogolo kumamatira ndi ntchito yomanga.Makamaka pakumanga, amatha kutalikitsa ndikusintha nthawi yoyika, ndikuwonjezeka kwa mlingo wa HPMC, nthawi yoyika matope yatalikitsidwa;Kupititsa patsogolo machinability ndi pumpability, oyenera kumanga makina;Ikhoza kupititsa patsogolo ntchito yomanga ndikuletsa kutentha kwa mchere wosungunuka m'madzi pamwamba pa nyumbayo.

2, HPMC mu mawonekedwe apadera amatope

HPMC ndi kothandiza madzi posungira wothandizila youma matope, amene amachepetsa mlingo wa magazi ndi stratification digiri ya matope ndi bwino cohesiveness matope.HPMC ikhoza kupititsa patsogolo mphamvu zamakokedwe ndi mphamvu zomangirira zamatope, ngakhale mphamvu yopindika ndi mphamvu yamatope imachepetsedwa pang'ono ndi HPMC.Komanso, HPMC akhoza bwino ziletsa mapangidwe ming'alu pulasitiki mu matope, kuchepetsa pulasitiki akulimbana index wa matope, matope posungira madzi kumawonjezeka ndi kukhuthala kwa mamasukidwe akayendedwe a HPMC, ndi pamene mamasukidwe akayendedwe kuposa 100000mPa • s, madzi posungira salinso. kuchuluka kwambiri.HPMC fineness kumakhalanso ndi zotsatira zina pa mlingo madzi posungira matope, pamene tinthu ndi bwino, mlingo posungira madzi matope wakhala bwino, kawirikawiri ntchito simenti matope HPMC tinthu kukula ayenera kukhala zosakwana 180 microns (80 mauna chophimba) .Zomwe zili bwino za HPMC mumatope owuma ndi 1 ‰ ~ 3 ‰.

2.1, matope HPMC pambuyo kusungunuka m'madzi, chifukwa pamwamba yogwira ntchito kuonetsetsa gelled zakuthupi bwino yunifolomu kugawa mu dongosolo, ndi HPMC ngati mtundu wa colloid zoteteza, "phukusi" olimba particles, ndi kunja kwake pamwamba kupanga wosanjikiza kondomu filimu, kupanga slurry dongosolo ndi khola, komanso anakweza matope mu kusanganikirana ndondomeko liquidity ndi yomanga kuzembera mwina komanso.

2.2 HPMC njira chifukwa cha makhalidwe ake maselo dongosolo, kuti madzi mu matope n'zovuta kutaya, ndipo pang'onopang'ono anamasulidwa mu nthawi yaitali, kupereka matope zabwino posungira madzi ndi kumanga.Zimalepheretsa madzi kuyenda mofulumira kuchokera kumatope kupita kumunsi, kotero kuti madzi osungidwa amakhalabe pamwamba pa zinthu zatsopano, zomwe zimalimbikitsa hydration ya simenti ndikuwonjezera mphamvu yomaliza.Makamaka, ngati mawonekedwe okhudzana ndi matope a simenti, pulasitala ndi binder amataya madzi, gawo ili lilibe mphamvu komanso pafupifupi palibe mphamvu yolumikizira.Nthawi zambiri, padziko kukhudzana ndi zinthu zimenezi ndi matupi adsorption, mochuluka kapena mochepa kuyamwa madzi kuchokera pamwamba, kuchititsa mbali iyi ya hydration si wathunthu, kotero kuti simenti matope ndi ceramic matailosi gawo lapansi ndi ceramic matailosi kapena pulasitala ndi metope bond mphamvu kuchepa.

Pokonzekera matope, kusungirako madzi kwa HPMC ndiye ntchito yayikulu.Zatsimikiziridwa kuti kusunga madzi kumatha kufika 95%.Kuwonjezeka kwa kulemera kwa maselo a HPMC ndi mlingo wa simenti kumapangitsa kuti madzi asamasungidwe komanso mphamvu zomangira matope.

Chitsanzo: chifukwa chomangira matayala chiyenera kukhala ndi mphamvu yapamwamba pakati pa maziko ndi matayala, kotero binder imakhudzidwa ndi mbali ziwiri za madzi adsorption;Malo oyambira (khoma) ndi matailosi.Matailo apadera a ceramic, kusiyana kwaubwino ndi kwakukulu kwambiri, ma pores ena ndi akulu kwambiri, mayamwidwe amadzi a ceramic matailosi ndi okwera kwambiri, kotero kuti magwiridwe antchito amawonongeka, wothandizila kusunga madzi ndikofunikira kwambiri, ndipo kuwonjezera kwa HPMC kumatha kukwaniritsa izi. chofunika.

2.3 HPMC imakhala yokhazikika ku ma acid ndi maziko, ndipo yankho lamadzimadzi ndilokhazikika kwambiri mu pH = 2 ~ 12. Caustic soda ndi madzi a mandimu sakhala ndi zotsatira zambiri pa katundu wake, koma alkali akhoza kufulumizitsa kusungunuka kwake, ndipo pang'ono kusintha mamasukidwe akayendedwe.

2.4, yowonjezera ntchito yomanga matope a HPMC yakhala bwino kwambiri, matope akuwoneka kuti ali ndi "mafuta", amatha kupanga makoma a khoma kukhala odzaza, osalala, kotero kuti matailosi kapena njerwa ndi maziko omangira olimba, ndipo amatha kutalikitsa nthawi yogwira ntchito, yoyenera kwa akuluakulu. malo omanga.

2.5 HPMC ndi mtundu wa electrolyte sanali ionic ndi sanali polymeric electrolyte.Ndiwokhazikika mu njira yamadzimadzi yokhala ndi mchere wachitsulo ndi ma electrolyte organic, ndipo imatha kuwonjezeredwa muzomangamanga kwa nthawi yayitali kuti zitsimikizire kukhazikika kwake.

HPMC kupanga ndondomeko makamaka thonje CHIKWANGWANI (zapakhomo) pambuyo alkalization, etherification ndi m'badwo wa polysaccharide ether mankhwala.Zilibe zolipiritsa zokha, ndipo sizimayenderana ndi ma ion opangidwa ndi gelled, ndipo ntchito yake imakhala yokhazikika.Mtengo wake ndi wotsika kuposa mitundu ina ya cellulose ether, motero imagwiritsidwa ntchito kwambiri mumatope owuma.

Hydroxypropyl methyl cellulose Mtengo wa HPMCntchito mu matope osakaniza owuma:

Mtengo wa HPMCzitha kupanga matope atsopano osakanikirana kuti akhale ndi kukhuthala konyowa, kuteteza tsankho.Kusungirako madzi (thickening) ndi chinthu chofunikira kwambiri, chomwe chimathandiza kusunga madzi aulere mumatope, motero kumapatsa simenti nthawi yochuluka kuti ikhale ndi hydrate pambuyo pa matope.(kusungira madzi) mpweya wake, akhoza kuyambitsa thovu yunifolomu yaing'ono, kusintha ntchito yomanga matope.

Hydroxypropyl methyl cellulose ether viscosity yayikulu yosungira madzi ndi bwino.Viscosity ndi gawo lofunikira la magwiridwe antchito a HPMC.Pakali pano, opanga osiyana HPMC ntchito njira zosiyanasiyana ndi zida kudziwa mamasukidwe akayendedwe a HPMC.Njira zazikulu ndi HaakeRotovisko, Hoppler, Ubbelohde ndi Brookfield, etc.

Kwa mankhwala omwewo, zotsatira za viscosity zoyesedwa ndi njira zosiyanasiyana ndizosiyana kwambiri, zina zimakhala zosiyana.Chifukwa chake, poyerekeza mamasukidwe akayendedwe, ayenera kuchitidwa pakati pa njira yoyesera yofananira, kuphatikiza kutentha, rotor, ndi zina zambiri.

Pa kukula kwa tinthu tating'onoting'ono, tinthu tating'onoting'ono timasunga bwino madzi.Large particles wa mapadi etere kukhudzana ndi madzi, pamwamba yomweyo kupasuka ndi kupanga gel osakaniza kukulunga zinthu kuteteza madzi mamolekyu kupitiriza kudutsa, nthawi zina yaitali yogwira ntchito sangathe wogawana omwazika kusungunuka, mapangidwe matope flocculent njira kapena agglomerate.Kusungunuka kwa cellulose ether ndi chimodzi mwazinthu zomwe mungasankhe cellulose ether.Fineness ndiwonso index yofunikira ya methyl cellulose ether.MC kwa matope youma amafuna ufa, otsika madzi okhutira, ndi fineness wa 20% ~ 60% tinthu kukula zosakwana 63um.Fineness imakhudza kusungunuka kwa hydroxypropyl methyl cellulose ether.Coarse MC kawirikawiri granular ndipo mosavuta kusungunuka m'madzi popanda agglomerating, koma Kutha liwiro ndi wodekha kwambiri, kotero si oyenera ntchito youma matope.Mu matope owuma, MC imamwazikana pakati pa zophatikiza, zodzaza bwino ndi zopangira simenti monga simenti, ndi ufa wokha womwe uli wokwanira ungapewe kuphatikizika kwa methyl cellulose ether posakanikirana ndi madzi.Pamene MC akuwonjezera madzi kupasuka agglomerate, ndi kovuta kumwazikana ndi kupasuka izo.MC ndi coarse fineness osati zinyalala, komanso amachepetsa m'deralo mphamvu ya matope.Pamene matope owuma otere amangidwa m'dera lalikulu, liwiro la kuchiritsa la matope owuma a m'deralo limachepetsedwa kwambiri, zomwe zimabweretsa kusweka chifukwa cha nthawi yochiritsa yosiyana.Kwa makina opopera matope, chifukwa cha nthawi yochepa yosakaniza, ubwino ndi wapamwamba.

Nthawi zambiri, kukwezeka kwa mamachulukidwe kumapangitsa kuti madzi asungidwe bwino.Komabe, kukhuthala kwake kukakhala kokwezeka, kulemera kwa mamolekyu a MC ndikokwera kwambiri, ndipo kusungunuka kumachepa mofanana, zomwe zimakhudza mphamvu ndi ntchito yomanga yamatope.The apamwamba mamasukidwe akayendedwe, zoonekeratu kwambiri thickening zotsatira za matope, koma si wofanana ubale.Kukwezeka kwa viscosity, matope onyowa adzakhala omata kwambiri, zomangamanga zonse, ntchito ya scraper yomata komanso kumamatira kwambiri kuzinthu zoyambira.Koma sizothandiza kuwonjezera mphamvu zamapangidwe amatope onyowa.Mwa kuyankhula kwina, ntchito yotsutsa-sag sizowonekera panthawi yomanga.M'malo mwake, ma viscosity ena otsika koma osinthidwa a methyl cellulose ether ali ndi ntchito yabwino kwambiri pakuwongolera mphamvu zamapangidwe amatope onyowa.

Kusungidwa kwa madzi kwa HPMC kumagwirizananso ndi kutentha kwa ntchito, ndipo kusungidwa kwa madzi kwa methyl cellulose ether kumachepa ndi kukwera kwa kutentha.Koma muzogwiritsidwa ntchito zenizeni, malo ambiri amatope owuma nthawi zambiri amakhala otentha kwambiri (opitilira madigiri 40) pansi pamikhalidwe yomanga mu gawo lapansi lotentha, monga chilimwe insolation ya kunja khoma putty pulasitala, amene nthawi zambiri imathandizira kulimba kwa simenti ndi kuumitsa matope.Kuchepa kwa kuchuluka kwa kusungirako madzi kumabweretsa kumverera koonekeratu kuti zonse zomanga ndi kukana kusweka zimakhudzidwa.Mu chikhalidwe ichi, kuchepetsa mphamvu ya kutentha zinthu kumakhala kovuta kwambiri.Pachifukwa ichi, chowonjezera cha methyl hydroxyethyl cellulose ether pakali pano chikuwoneka kuti chili patsogolo pa chitukuko chaukadaulo.Ngakhale kuchuluka kwa mlingo wa methyl hydroxyethyl cellulose (chilinganizo cha chilimwe), kumanga ndi kukana kusweka sikungakwaniritse zosowa zogwiritsidwa ntchito.Kupyolera mu chithandizo chapadera cha MC, monga kuonjezera mlingo wa etherification, mphamvu yosungira madzi ya MC ikhoza kukhala ndi zotsatira zabwino pa kutentha kwakukulu, kotero kuti ikhoza kupereka ntchito yabwino pansi pa zovuta.

General HPMC ali kutentha gel osakaniza, akhoza pafupifupi ogaŵikana 60, 65, 75 mtundu.Kwa matope wamba okonzeka kugwiritsa ntchito mabizinesi a mchenga wamtsinje amayenera kusankha kutentha kwa gel osakaniza 75 HPMC.Mlingo wa HPMC suyenera kukhala wokwera kwambiri, wokwera kwambiri udzawonjezera kufunikira kwa madzi amatope, kumamatira ku pulasitala, nthawi ya condensation ndi yayitali kwambiri, zimakhudza zomangamanga.Osiyana matope mankhwala kusankha kukhuthala osiyana HPMC, musati mwawamba ntchito mkulu mamasukidwe akayendedwe HPMC.Choncho, ngakhale mankhwala a hydroxypropyl methyl cellulose ndi abwino, koma ndi bwino kusankha HPMC yoyenera ndi udindo waukulu wa ogwira ntchito za labotale.Pakali pano, pali ambiri ogulitsa osaloledwa pawiri ndi HPMC, khalidwe ndi osauka ndithu, zasayansi ayenera kusankha mapadi ena, kuchita kuyesera bwino, kuonetsetsa bata la mankhwala matope, musasirire zotchipa, kubweretsa zotayika zosafunikira.