1. Kodi ntchito yaikulu yahydroxypropyl methylcellulose (HPMC)?
Hydroxypropyl methylcellulose imagwiritsidwa ntchito kwambiri pa zinthu zomangira, zokutira, ma resini opangidwa, zinthu zadothi, mankhwala, chakudya, nsalu, ulimi, zodzoladzola, fodya ndi mafakitale ena. Hydroxypropyl methylcellulose ikhoza kugawidwa m'magulu omangira, chakudya ndi mankhwala malinga ndi momwe imagwiritsidwira ntchito. Pakadali pano, zinthu zambiri zapakhomo ndi zapakhomo. Mumagulu omangira, ufa wa putty umagwiritsidwa ntchito kwambiri, pafupifupi 90% imagwiritsidwa ntchito pa ufa wa putty, ndipo wotsalawo amagwiritsidwa ntchito pa simenti ndi guluu.
2. Pali mitundu ingapo ya hydroxypropyl methylcellulose (HPMC), ndipo kodi kusiyana kwake ndi kotani?
HPMC ingagawidwe m'magulu awiri: mtundu wa instant ndi mtundu wa hot-solving. Zinthu za instant type zimafalikira mofulumira zikakumana ndi madzi ozizira ndipo zimasowa m'madzi. Panthawiyi, madziwo alibe kukhuthala chifukwa HPMC imangofalikira m'madzi popanda kusungunuka kwenikweni. Patatha mphindi ziwiri, kukhuthala kwa madziwo kumawonjezeka pang'onopang'ono, ndikupanga colloid yowonekera bwino. Zinthu zosungunuka ndi madzi ozizira, zikakumana ndi madzi ozizira, zimatha kufalikira mwachangu m'madzi otentha ndikusowa m'madzi otentha. Kutentha kukatsika kufika kutentha kwina, kukhuthala kudzawonekera pang'onopang'ono mpaka zitapanga colloid yowonekera bwino. Mtundu wa hot-melt ungagwiritsidwe ntchito mu ufa wa putty ndi matope okha. Mu guluu wamadzimadzi ndi utoto, padzakhala zochitika zamagulu ndipo sizingagwiritsidwe ntchito. Mtundu wa instant uli ndi ntchito zambiri. Ungagwiritsidwe ntchito mu ufa wa putty ndi matope, komanso guluu wamadzimadzi ndi utoto, popanda zotsutsana zilizonse.
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) Onjezani 1/3 kapena 2/3 ya madzi ofunikira mu chidebecho, ndikutenthetsani mpaka 70 ° C, malinga ndi njira ya 1), falitsani HPMC kuti mukonze 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, maukonde 120 ndi ochepa, ndipo maukonde ambiri a HPMC opangidwa ku Hebei amakhala ndi maukonde 80. Kusalala kwambiri, makamaka, kumakhala bwino.
(3) Kutumiza: Ikani hydroxypropyl methylcellulose (HPMC) m'madzi kuti apange colloid yowonekera, ndikuyang'ana momwe imatumizira. Kutumiza kwake kuli kwakukulu, kumakhala bwino, zomwe zikusonyeza kuti palibe chosungunuka kwambiri. 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 kuchuluka kwa hydroxypropyl methylcellulose (HPMC) mu ufa wa putty ndi kotani?
Kuchuluka kwa HPMC komwe kumagwiritsidwa ntchito kumasiyana malinga ndi nyengo, kutentha, mtundu wa calcium ya phulusa, mtundu wa ufa wa putty ndi "ubwino womwe makasitomala amafunikira". Kawirikawiri, pakati pa 4 kg ndi 5 kg. Mwachitsanzo: ufa wambiri wa putty ku Beijing ndi 5 kg; ufa wambiri wa putty ku Guizhou ndi 5 kg m'chilimwe ndi 4.5 kg m'nyengo yozizira; kuchuluka kwa ufa wa putty ku Yunnan ndi kochepa, nthawi zambiri kuyambira 3 kg mpaka 4 kg, ndi zina zotero.
6. Kodi kukhuthala koyenera kwa hydroxypropyl methylcellulose (HPMC) ndi kotani?
Ufa wa putty nthawi zambiri umakhala wokwanira mayuan 100,000, ndipo zofunikira pa matope ndi zapamwamba, ndipo mayuan 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 kuchuluka kwa hydroxypropyl ndi kukhuthala kwa madzi. Anthu omwe ali ndi hydroxypropyl yambiri nthawi zambiri amakhala ndi madzi abwino. Amene ali ndi kukhuthala kwa madzi ambiri amakhala ndi madzi abwino, makamaka (osati kwathunthu), ndipo amene ali ndi kukhuthala kwa madzi ambiri amagwiritsidwa ntchito bwino mu simenti.
8. Kodi zipangizo zazikulu zoyambira ndi ziti?hydroxypropyl methylcellulose (HPMC)?
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 HPMC mu ufa wa putty ndi yotani, ndipo kodi imachitika ndi mankhwala?
Mu ufa wa putty, HPMC imagwira ntchito zitatu monga kukhuthala, kusunga madzi ndi kumanga. Kukhuthala: Cellulose imatha kukhuthala kuti iimike ndikusunga yankholo mofanana mmwamba ndi pansi, ndikupewa kutsika. Kusunga madzi: kumapangitsa ufa wa putty kuumitsa pang'onopang'ono, ndikuthandiza phulusa la calcium kuchitapo kanthu pansi pa madzi. Kapangidwe: Cellulose imakhala ndi mafuta odzola, zomwe zingapangitse ufa wa putty kukhala ndi kapangidwe kabwino. HPMC sichita nawo machitidwe aliwonse a mankhwala, koma imagwira ntchito yothandizira. Kuwonjezera madzi ku ufa wa putty ndikuyika pakhoma ndi njira ya mankhwala, chifukwa zinthu zatsopano zimapangidwa. Ngati mutachotsa ufa wa putty pakhoma kuchokera pakhoma, ndikuupera 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, Ca O 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 wamba, ma non-ion ndi zinthu zomwe sizipanga ioni m'madzi. Ionization imatanthauza njira yomwe electrolyte imalekanitsidwa kukhala ma ayoni omwe ali ndi mphamvu zomwe zimatha kuyenda momasuka mu solvent inayake (monga madzi, mowa). Mwachitsanzo, sodium chloride (NaCl), mchere womwe timadya tsiku lililonse, umasungunuka m'madzi ndipo umapanga ma ayoni kuti apange ma ayoni a sodium (Na+) omwe ali ndi mphamvu zabwino komanso ma ayoni a chloride (Cl) omwe ali ndi mphamvu zoyipa. Izi zikutanthauza kuti, pameneHPMCikayikidwa m'madzi, sidzalekanitsidwa kukhala ma ayoni omwe ali ndi mphamvu, koma imapezeka mu mawonekedwe a mamolekyu.
Nthawi yotumizira: Epulo-28-2024