1. Ntchito yayikulu ya chiyanihydroxypropyl methylcellulose (HPMC)?
Hydroxypropyl methylcellulose chimagwiritsidwa ntchito zomangamanga, zokutira, utomoni kupanga, zoumba, mankhwala, chakudya, nsalu, ulimi, zodzoladzola, fodya ndi mafakitale ena. Hydroxypropyl methylcellulose akhoza kugawidwa mu kalasi yomanga, kalasi ya chakudya ndi kalasi ya mankhwala malinga ndi ntchito yake. Pakali pano, zinthu zambiri zapakhomo ndizomangamanga. Pomanga kalasi, ufa wa putty umagwiritsidwa ntchito mochuluka, pafupifupi 90% umagwiritsidwa ntchito ngati putty ufa, ndipo enawo amagwiritsidwa ntchito ngati matope a simenti ndi guluu.
2. Pali mitundu ingapo ya hydroxypropyl methylcellulose (HPMC), ndipo pali kusiyana kotani pakugwiritsa ntchito kwawo?
HPMC akhoza kugawidwa mu mtundu nthawi yomweyo ndi kutentha-kusungunuka mtundu. Mankhwala amtundu wa Instant amabalalika mwachangu akakumana ndi madzi ozizira ndikuzimiririka m'madzi. Panthawi imeneyi, madzi alibe mamasukidwe akayendedwe chifukwa HPMC okha omwazika m'madzi popanda kuvunda kwenikweni. Pambuyo pa mphindi ziwiri, kukhuthala kwamadzimadzi kumawonjezeka pang'onopang'ono, ndikupanga mawonekedwe a viscous colloid. Zogulitsa zotentha zotentha, zikakumana ndi madzi ozizira, zimatha kumwazikana m'madzi otentha ndikuzimiririka m'madzi otentha. Kutentha kumatsika mpaka kutentha kwina, kukhuthala kumawonekera pang'onopang'ono mpaka kumapanga mawonekedwe a viscous colloid. Mtundu wosungunuka wotentha ukhoza kugwiritsidwa ntchito mu putty ufa ndi matope. Mu guluu wamadzimadzi ndi utoto, padzakhala zochitika zamagulu ndipo sizingagwiritsidwe ntchito. Mtundu wapomwepo uli ndi mapulogalamu ambiri. Itha kugwiritsidwa ntchito mu putty ufa ndi matope, komanso guluu wamadzimadzi ndi utoto, popanda zotsutsana.
3. Kodi njira zosungunulira za hydroxypropyl methylcellulose (HPMC) ndi ziti?
Njira yosungunula madzi otentha: Popeza HPMC simasungunuka m'madzi otentha, HPMC imatha kumwazikana m'madzi otentha poyambira, kenako imasungunuka ikakhazikika. Njira ziwiri zodziwika bwino zimafotokozedwa motere:
1) Ikani madzi otentha ofunikira mumtsuko ndikutenthetsa pafupifupi 70 ° C. Hydroxypropyl methylcellulose inawonjezeredwa pang'onopang'ono ndikugwedeza pang'onopang'ono, poyamba HPMC inayandama pamwamba pa madzi, ndipo pang'onopang'ono imapanga slurry, yomwe inakhazikika pansi pa kugwedezeka.
2) Onjezani 1/3 kapena 2/3 ya kuchuluka kwa madzi ofunikira mumtsuko, ndikuwotcha mpaka 70 ° C, malinga ndi njira ya 1), kumwaza HPMC kukonzekera slurry yamadzi otentha; kenaka yikani otsala kuchuluka kwa madzi ozizira kwa madzi otentha slurry, osakaniza utakhazikika pambuyo oyambitsa.
Njira yosakaniza ufa: sakanizani ufa wa HPMC ndi zinthu zina zambiri za ufa, sakanizani bwino ndi chosakanizira, kenaka yikani madzi kuti asungunuke, ndiye HPMC ikhoza kusungunuka panthawiyi popanda agglomeration, chifukwa pali HPMC pang'ono pakona iliyonse ya Powder, idzasungunuka nthawi yomweyo ikakumana ndi madzi. ——Opanga matope a ufa ndi matope akugwiritsa ntchito njirayi. [Hydroxypropyl methylcellulose (HPMC) amagwiritsidwa ntchito ngati thickener ndi chosungira madzi mu putty powder mortar.]
4. Kodi mungaweruze bwanji ubwino wa hydroxypropyl methylcellulose (HPMC) mophweka komanso mwachidziwitso?
(1) Kuyera: Ngakhale kuyera sikungadziwe ngati HPMC ndi yosavuta kugwiritsa ntchito, ndipo ngati zowonjezera zoyera zikuwonjezeredwa panthawi yopanga, zidzakhudza khalidwe lake. Komabe, zinthu zambiri zabwino zimakhala ndi zoyera zabwino.
(2) Fineness: Ubwino wa HPMC nthawi zambiri umakhala ndi mauna 80 ndi mauna 100, mauna 120 amakhala ochepa, ndipo HPMC yambiri yopangidwa ku Hebei ndi ma mesh 80. Kukongoletsedwa bwino, kunena zambiri, kumakhala bwinoko.
(3) Transmittance: Ikani hydroxypropyl methylcellulose (HPMC) m'madzi kuti mupange colloid yowonekera, ndikuwona kufalikira kwake. Kukwera kwa transmittance, kuli bwino, kusonyeza kuti pali zochepa zosasungunuka mmenemo. The permeability wa ofukula riyakitala zambiri zabwino, ndi yopingasa riyakitala ndi zoipa, koma sizikutanthauza kuti khalidwe ofukula riyakitala kuposa yopingasa riyakitala, ndi mankhwala khalidwe anatsimikiza ndi zinthu zambiri.
(4) Mphamvu yokoka yeniyeni: Kuchuluka kwa mphamvu yokoka kwapadera, ndikolemera kwambiri. Kutsimikizika ndi kwakukulu, makamaka chifukwa zomwe zili mugulu la hydroxypropyl momwemo ndizazikulu, ndipo zomwe zili mugulu la hydroxypropyl ndizokwera, kusungirako madzi kuli bwino.
5. Kodi hydroxypropyl methylcellulose (HPMC) ndi chiyani mu putty powder?
Kuchuluka kwa HPMC komwe kumagwiritsidwa ntchito pochita ntchito kumasiyanasiyana malinga ndi nyengo, kutentha, khalidwe la calcium phulusa la m'deralo, ufa wa putty powder ndi "khalidwe lofunika kwa makasitomala". Nthawi zambiri, pakati pa 4 kg ndi 5 kg. Mwachitsanzo: ufa wambiri wa putty ku Beijing ndi 5 kg; ambiri a putty ufa ku Guizhou ndi 5 makilogalamu m'chilimwe ndi 4.5 makilogalamu m'nyengo yozizira; kuchuluka kwa ufa wa putty ku Yunnan ndizochepa, nthawi zambiri 3 kg mpaka 4 kg, etc.
6. Kodi kukhuthala koyenera kwa hydroxypropyl methylcellulose (HPMC) ndi chiyani?
Putty ufa nthawi zambiri ndi wokwanira 100,000 yuan, ndipo zofunikira pamatope ndizokwera, ndipo 150,000 yuan ndiyofunika kuti igwiritsidwe ntchito mosavuta. Komanso, ntchito yofunika kwambiri ya HPMC ndi kusunga madzi, kenako thickening. Mu ufa wa putty, malinga ngati kusungirako madzi kuli bwino ndipo kukhuthala kuli kochepa (70,000-80,000), ndizothekanso. Zoonadi, kukwezeka kwa viscosity kumapangitsa kuti madzi azikhala bwino. Pamene mamasukidwe akayendedwe kuposa 100,000, mamasukidwe akayendedwe adzakhudza kasungidwe madzi. Osatinso zambiri.
7. Kodi zizindikiro zazikulu za hydroxypropyl methylcellulose (HPMC) ndi ziti?
Hydroxypropyl zili ndi mamasukidwe akayendedwe, owerenga ambiri nkhawa zizindikiro ziwirizi. Amene ali ndi hydroxypropyl yambiri amakhala ndi madzi osungira bwino. Amene ali ndi kukhuthala kwakukulu amakhala ndi madzi osungira bwino, (osati mwamtheradi), ndipo omwe ali ndi kukhuthala kwakukulu amagwiritsidwa ntchito bwino mumatope a simenti.
8. Zida zazikulu zopangira ndi chiyanihydroxypropyl methylcellulose (HPMC)?
Zida zazikulu za hydroxypropyl methylcellulose (HPMC): thonje woyengedwa, methyl chloride, propylene oxide, ndi zina zopangira, caustic soda, asidi, toluene, isopropanol, etc.
9. Kodi ntchito yaikulu yogwiritsira ntchito HPMC mu putty powder ndi yotani, ndipo imachitika ndi mankhwala?
Mu putty powder, HPMC imagwira ntchito zitatu zokulitsa, kusunga madzi ndi kumanga. Kukhuthala: Ma cellulose amatha kukhuthala kuti ayimitse ndikusunga yunifolomu ya yankho mmwamba ndi pansi, ndikupewa kugwa. Kusungirako madzi: pangani ufa wa putty kuti uume pang'onopang'ono, ndipo thandizani phulusa la calcium kuti lizigwira ntchito pansi pa madzi. Zomangamanga: Ma cellulose amakhala ndi mafuta, omwe amatha kupanga ufa wa putty kukhala womanga bwino. HPMC satenga nawo gawo pazosintha zilizonse zamakina, koma imagwira ntchito yothandiza. Kuonjezera madzi ku ufa wa putty ndikuwuyika pakhoma ndi mankhwala, chifukwa zinthu zatsopano zimapangidwira. Mukachotsa ufa wa putty pakhoma kuchokera pakhoma, perani kukhala ufa, ndikugwiritsanso ntchito, sizingagwire ntchito chifukwa zinthu zatsopano (calcium carbonate) zapangidwa.) Nazonso. Zigawo zazikulu za ufa wa phulusa la calcium ndi: osakaniza a Ca (OH) 2, Ca O ndi CaCO3 pang'ono, CaO+H2O=Ca (OH)2—Ca(OH)2+CO2=CaCO3↓+H2O Kashiamu yam'madzi ili m'madzi ndi mpweya Pansi pa CO2, calcium carbonate imapangidwa, pamene HPMC imasunga kashiamu m'madzi, imagwiranso ntchito bwino, imathandizira madzi.
10. HPMC ndi ether yosakhala ya ionic cellulose, ndiye kuti si-ionic ndi chiyani?
M'mawu a layman, si-ion ndi zinthu zomwe sizimayimitsa m'madzi. Ionization imatanthawuza njira yomwe electrolyte imasiyanitsidwa ndi ma ion omwe amatha kuyenda momasuka muzosungunulira zina (monga madzi, mowa). Mwachitsanzo, sodium chloride (NaCl), mchere umene timadya tsiku lililonse, umasungunuka m'madzi ndi ionizes kupanga ma ion sodium (Na+) omwe ali ndi magetsi abwino komanso ma chloride ions (Cl) omwe ali ndi vuto loipa. Ndiko kunena kuti, litiMtengo wa HPMCimayikidwa m'madzi, sichidzasiyanitsidwa ndi ma ion odzaza, koma imakhalapo ngati mamolekyu.
Nthawi yotumiza: Apr-28-2024