1. Kodi ntchito yaikulu yahydroxypropyl methylcellulose (HPMC)?
HPMC imagwiritsidwa ntchito kwambiri pa zipangizo zomangira, zokutira, ma resini opangidwa, zinthu zadothi, mankhwala, chakudya, nsalu, ulimi, zodzoladzola, fodya ndi mafakitale ena. HPMC ikhoza kugawidwa m'magulu a zomangamanga, chakudya ndi mankhwala malinga ndi cholinga chake. Pakadali pano, zinthu zambiri zapakhomo ndi zapakhomo. Mu gawo lomanga, ufa wa putty umagwiritsidwa ntchito kwambiri, pafupifupi 90% imagwiritsidwa ntchito pa ufa wa putty, ndipo wotsalawo umagwiritsidwa ntchito pa simenti.
2. Kodi fungo la hydroxypropyl methylcellulose (HPMC) ndi lotani?
HPMC yopangidwa ndi njira yosungunulira imagwiritsa ntchito toluene ndi isopropanol ngati zosungunulira. Ngati kutsuka sikuli bwino kwambiri, padzakhala fungo lotsalira.
3. Kodi njira zosungunula za hydroxypropyl methylcellulose (HPMC) ndi ziti?
Njira yosungunula madzi otentha: Popeza HPMC siisungunuka m'madzi otentha, HPMC imatha kusungunuka mofanana m'madzi otentha poyamba, kenako n’kusungunuka mofulumira ikazizira. Njira ziwiri zodziwika bwino zafotokozedwa motere:
1) Ikani madzi otentha okwanira mu chidebecho ndikutenthetsa mpaka pafupifupi 70°C. Hydroxypropyl methylcellulose inawonjezedwa pang'onopang'ono mukasakaniza pang'onopang'ono, poyamba HPMC inkayandama pamwamba pa madzi, kenako pang'onopang'ono imapanga matope, omwe anaziziritsidwa mukasakaniza.
2), onjezerani 1/3 kapena 2/3 ya madzi ofunikira mu chidebecho, ndikutenthetsa mpaka 70°C, falitsani HPMC motsatira njira ya 1), ndikukonza slurry ya madzi otentha; kenako onjezerani madzi ozizira otsalawo ku slurry ya madzi otentha, chisakanizocho chinaziziritsidwa mutasakaniza.
Njira yosakanizira ufa: Sakanizani ufa wa HPMC ndi zinthu zina zambiri za ufa, sakanizani bwino ndi chosakanizira, kenako onjezerani madzi kuti asungunuke, kenako HPMC ikhoza kusungunuka panthawiyi popanda kusonkhana, chifukwa pali HPMC yochepa chabe mu ngodya iliyonse yaying'ono ya Ufa, yomwe imasungunuka nthawi yomweyo ikakhudzana ndi madzi. ——Opanga ufa wa Putty ndi matope akugwiritsa ntchito njira iyi. [Hydroxypropyl methylcellulose (HPMC) imagwiritsidwa ntchito ngati chokhuthala komanso chosungira madzi mu matope a Putty powder.]
4. Kodi mungaweruze bwanji ubwino wa hydroxypropyl methylcellulose (HPMC) mosavuta komanso mwachilengedwe?
(1) Kuyera: Ngakhale kuti kuyera sikungathe kudziwa ngati HPMC ndi yosavuta kugwiritsa ntchito, ndipo ngati zinthu zoyera ziwonjezedwa panthawi yopanga, zidzakhudza ubwino wake. Komabe, zinthu zambiri zabwino zimakhala ndi kuyera kwabwino.
(2) Kusalala: Kusalala kwa HPMC nthawi zambiri kumakhala ndi maukonde 80 ndi maukonde 100, ndipo maukonde 120 ndi ochepa. HPMC yambiri yopangidwa ku Hebei ndi maukonde 80. Kusalala kwambiri, makamaka, kumakhala bwino.
(3) Kutumiza kuwala: puthydroxypropyl methylcellulose (HPMC)Mu madzi kuti mupange colloid yowonekera bwino, ndikuyang'ana momwe kuwala kwake kumayendera. Kuchuluka kwa kuwala, kumakhala bwino, zomwe zikusonyeza kuti mulibe zinthu zambiri zosasungunuka. . Kulowa kwa ma reactors oyima nthawi zambiri kumakhala bwino, ndipo kwa ma reactors oyima nthawi zambiri kumakhala koipa, koma sizikutanthauza kuti mtundu wa ma reactors oyima ndi wabwino kuposa wa ma reactors oyima, ndipo mtundu wa chinthu umatsimikiziridwa ndi zinthu zambiri.
(4) Mphamvu yokoka: Mphamvu yokoka ikakhala yayikulu, kulemera kwake kumakhala bwino. Kuchuluka kwake kumakhala kwakukulu, makamaka chifukwa chakuti kuchuluka kwa hydroxypropyl group mkati mwake kuli kokwera, ndipo kuchuluka kwa hydroxypropyl group kuli kokwera, kusunga madzi kumakhala bwino.
5. Kodi pali kusiyana kotani pakati pa mtundu wa hydroxypropyl methylcellulose wosungunuka ndi mtundu wa hydroxypropyl methylcellulose womwe umasungunuka kwambiri popanga zinthu?
Mtundu wa HPMC wofalikira mofulumira umathiridwa pamwamba ndi glyoxal, ndipo umafalikira mofulumira m'madzi ozizira, koma susungunuka kwenikweni. Umasungunuka kokha pamene kukhuthala kukuwonjezeka. Mtundu wa instant type sunathiridwe pamwamba ndi glyoxal. Ngati kuchuluka kwa glyoxal kuli kwakukulu, kufalikira kudzakhala mofulumira, koma kukhuthala kudzawonjezeka pang'onopang'ono, ndipo ngati kuchuluka kuli kochepa, zosiyana ndi zimenezo zidzakhala zoona.
6. Kodi kukhuthala koyenera kwa hydroxypropyl methylcellulose (HPMC) ndi kotani?
Ufa wa putty nthawi zambiri umakhala wa yuan 100,000, ndipo zofunikira pa matope ndi zapamwamba, ndipo ma yuan 150,000 amafunika kuti agwiritsidwe ntchito mosavuta. Komanso, ntchito yofunika kwambiri ya HPMC ndikusunga madzi, kutsatiridwa ndi kukhuthala. Mu ufa wa putty, bola ngati kusunga madzi kuli bwino ndipo kukhuthala kuli kochepa (70,000-80,000), n'zothekanso. Zachidziwikire, kukhuthala kwakukulu, kukhuthala kwa madzi kumakhala bwino. Kukhuthala kukapitirira 100,000, kukhuthala kudzakhudza kusunga madzi. Palibe zambiri pano.
7. Kodi zizindikiro zazikulu zaukadaulo za hydroxypropyl methylcellulose (HPMC) ndi ziti?
Anthu ambiri akuda nkhawa ndi zizindikiro ziwirizi. Anthu omwe ali ndi hydroxypropyl yambiri nthawi zambiri amakhala ndi madzi abwino. Amene ali ndi kukhuthala kwakukulu amakhala ndi madzi abwino, makamaka (osati kwathunthu), ndipo amene ali ndi kukhuthala kwakukulu amagwiritsidwa ntchito bwino mu simenti.
8. Kodi zinthu zazikulu zopangira hydroxypropyl methylcellulose (HPMC) ndi ziti?
Zipangizo zazikulu zopangira hydroxypropyl methylcellulose (HPMC): thonje loyengedwa, methyl chloride, propylene oxide, ndi zipangizo zina zopangira, caustic soda, acid, toluene, isopropanol, ndi zina zotero.
9. Kodi ntchito yaikulu ya kugwiritsa ntchitoHPMCmu ufa wa putty, ndipo kodi zimachitika ndi mankhwala?
Mu ufa wa putty, HPMC imagwira ntchito zitatu monga kukhuthala, kusunga madzi ndi kumanga.
Kukhuthala: Cellulose ikhoza kupindika kuti iimirire ndikusunga yankholo molingana mmwamba ndi pansi, komanso kuti isagwedezeke.
Kusunga madzi: pangitsani ufa wa putty kuumitsa pang'onopang'ono, ndipo thandizani phulusa la calcium kuchitapo kanthu pansi pa mphamvu ya madzi.
Kapangidwe: Cellulose imakhala ndi mafuta odzola, zomwe zimapangitsa kuti ufa wa putty ukhale wabwino.
Kuonjezera madzi ku ufa wa putty ndikuuyika pakhoma ndi njira ya mankhwala, chifukwa zinthu zatsopano zimapangidwa. Ngati mutachotsa ufa wa putty pakhoma kuchokera pakhoma, kuupera kukhala ufa, ndikuugwiritsanso ntchito, sugwira ntchito chifukwa zinthu zatsopano (calcium carbonate) zapangidwanso.
Zigawo zazikulu za ufa wa calcium wa phulusa ndi izi: chisakanizo cha Ca(OH)2, CaO ndi CaCO3 yochepa, CaO+H2O=Ca(OH)2—Ca(OH)2+CO2=CaCO3↓+H2O Kalisiamu wa phulusa ali m'madzi ndi mumlengalenga Pansi pa mphamvu ya CO2, calcium carbonate imapangidwa, pomwe HPMC imasunga madzi okha, zomwe zimathandiza kuti calcium ya phulusa igwire bwino ntchito, ndipo sichita nawo chilichonse chomwe chimachitika.
10. HPMC ndi ether ya cellulose yosakhala ionic, ndiye kodi si ionic ndi chiyani?
Mwa mawu a anthu wamba, ma non-ion ndi zinthu zomwe sizipanga ayoni m'madzi. Kupanga ayoni kumatanthauza njira yomwe electrolyte imagawikana kukhala ma ayoni omwe ali ndi mphamvu zomwe zimatha kuyenda momasuka mu chosungunulira china chake (monga madzi, mowa). Mwachitsanzo, sodium chloride (NaCl), mchere womwe timadya tsiku lililonse, umasungunuka m'madzi ndipo umapanga ayoni kuti apange ayoni a sodium (Na+) omwe ali ndi mphamvu zabwino komanso ayoni a chloride (Cl) omwe ali ndi mphamvu zoyipa. Izi zikutanthauza kuti, HPMC ikayikidwa m'madzi, sidzagawikana kukhala ma ayoni omwe ali ndi mphamvu, koma imapezeka mu mawonekedwe a mamolekyu.
11. Kodi kutentha kwa gel kwa hydroxypropyl methylcellulose kumakhudzana bwanji ndi?
Kutentha kwa gel ya HPMC kumagwirizana ndi kuchuluka kwa methoxy komwe ili nako, kuchuluka kwa methoxy komwe kuli kotsika, kutentha kwa gel kumakhala kwakukulu.
12. Kodi pali ubale uliwonse pakati pa dontho la ufa wa putty ndi HPMC?
Kutayika kwa ufa wa putty kumakhudzana kwambiri ndi ubwino wa calcium ya phulusa, ndipo sikukhudzana kwenikweni ndi HPMC. Kuchepa kwa calcium ya imvi ndi chiŵerengero chosayenerera cha CaO ndi Ca(OH)2 mu calcium ya imvi kungayambitse kutayika kwa ufa. Ngati ikukhudzana ndi HPMC, ndiye kuti ngati HPMC ili ndi madzi ochepa, ingayambitsenso kutayika kwa ufa.
13. Kodi pali kusiyana kotani pakati pa mtundu wa hydroxypropyl methylcellulose wosungunuka ndi mtundu wa hydroxypropyl methylcellulose womwe umasungunuka kwambiri popanga zinthu?
Mtundu wa kufalikira mofulumira kwaHPMCimathiridwa pamwamba ndi glyoxal, ndipo imafalikira mofulumira m'madzi ozizira, koma siisungunuka kwenikweni. Imasungunuka kokha pamene kukhuthala kwawonjezeka. Mtundu wa instant type suli ndi chithandizo cha pamwamba ndi glyoxal. Ngati kuchuluka kwa glyoxal kuli kwakukulu, kufalikira kudzakhala mofulumira, koma kukhuthala kudzawonjezeka pang'onopang'ono, ndipo ngati kuchuluka kuli kochepa, zosiyana zidzakhala zoona.
Nthawi yotumizira: Epulo-25-2024