Kukhuthala kwa Hydroxypropyl methyl cellulose (HPMC) kwa Skim coat?
– yankho: Chovala chopanda mafuta chimakhala bwino nthawi zambiri HPMC 100000cps, chomwe chimakhala chachitali kuposa chofunikira mu matope, chimafuna mphamvu ya 150000cps kuti chigwiritsidwe ntchito. Komanso, HPMC ndiye gawo lofunika kwambiri pakusunga madzi, kutsatiridwa ndi kukhuthala. Mu chovala chopanda mafuta, bola ngati kusunga madzi kuli bwino, kukhuthala kuli kochepa (7-80000), n'zothekanso, ndithudi, kukhuthala kumakhala kwakukulu, kusungunuka kwa madzi kumakhala bwino, pamene kukhuthala kuli koposa 100,000, kukhuthala kwa kusunga madzi sikokwanira.
Kodi zizindikiro zazikulu zaukadaulo za hydroxypropyl methyl cellulose (HPMC) ndi ziti?
Yankho: Kuchuluka kwa hydroxypropyl ndi kukhuthala, ogwiritsa ntchito ambiri amasamala za zizindikiro ziwirizi. Kuchuluka kwa hydroxypropyl ndi kwakukulu, kusunga madzi nthawi zambiri kumakhala bwino. Kukhuthala, kusunga madzi, wachibale (koma osati kwathunthu) nakonso kuli bwino, ndipo kukhuthala, simenti matope ndi bwino kugwiritsa ntchito zina.
Hydroxypropyl methyl cellulose (HPMC) ndi zinthu ziti zazikulu zopangira?
Yankho: hydroxypropyl methyl cellulose (HPMC) zipangizo zazikulu zopangira: thonje loyengedwa, chloromethane, propylene oxide, zipangizo zina zopangira, mapiritsi a alkali, asidi, toluene, isopropyl alcohol ndi zina zotero.
HPMC mu skim coat mu ntchito, udindo waukulu, kaya mankhwala?
Yankho: HPMC mu Skim coat, kukhuthala, madzi ndi kapangidwe ka ntchito zitatu. Kukhuthala: cellulose ikhoza kupindika mpaka kuyimitsidwa, kotero kuti yankho likhalebe lofanana mmwamba ndi pansi monga ntchito yoletsa kuyenda kwa madzi. Kusunga madzi: kumapangitsa Skim coat kuumitsa pang'onopang'ono, calcium yothandizira imvi mukuchita kwa madzi. Kapangidwe: cellulose lubrication, ingapangitse Skim coat kukhala ndi kapangidwe kabwino. HPMC sichita nawo machitidwe aliwonse a mankhwala, koma imangogwira ntchito yothandizira. Skim coat ndi madzi, pakhoma, ndi mankhwala omwe amachitika chifukwa cha kupanga zinthu zatsopano, khoma la Skim coat limatsika kuchokera pakhoma, kuphwanyidwa kukhala ufa, kenako nkugwiritsa ntchito, osati bwino, chifukwa chapanga chinthu chatsopano (calcium carbonate). Zigawo zazikulu za ufa wa imvi wa calcium ndi izi: Ca(OH)2, CaO ndi kuchuluka kochepa kwa CaCO3 osakaniza, CaO+H2O=Ca(OH)2 – Ca(OH)2+CO2=CaCO3↓+H2O imvi ya calcium m'madzi ndi mpweya pansi pa zochita za CO2, mapangidwe a calcium carbonate, ndi HPMC yokha madzi, wothandiza imvi ya calcium yabwino, yake sinachite nawo chilichonse.
HPMC ndi etha ya cellulose yosakhala ionic, ndiye kodi si ionic ndi chiyani?
A: Kawirikawiri, ma non-ion ndi zinthu zomwe sizipanga ma ayoni m'madzi. Ionization ndi kugawanika kwa electrolyte kukhala ma ayoni oyendetsedwa ndi free-moving mu solvent inayake, monga madzi kapena mowa. Mwachitsanzo, mchere womwe timadya tsiku lililonse - sodium chloride (NaCl) umasungunuka m'madzi ndipo umapanga ma ayoni oyendetsedwa ndi free-moving sodium (Na+) okhala ndi positive charge ndi ma ayoni a chloride (Cl) okhala ndi negative charge. Izi zikutanthauza kuti, HPMC m'madzi simagawanika kukhala ma ayoni oyendetsedwa, koma imapezeka ngati mamolekyu.
Kodi kutentha kwa gelation kwa hydroxypropyl methyl cellulose kumakhudzana bwanji ndi?
Yankho: Kutentha kwa gel kwa HPMC kumagwirizana ndi kuchuluka kwa methoxyl. Kuchuluka kwa methoxyl kukakhala kochepa, kutentha kwa gel kumakhala kwakukulu.
Ufa wa skimcoat ndi HPMC palibe ubale?
Yankho: Ufa wa madontho a skim coat makamaka ndi phulusa la calcium zili ndi ubale waukulu kwambiri, ndipo HPMC ilibe ubale waukulu kwambiri. Kuchepa kwa calcium mu imvi ya calcium ndi kuchuluka kosayenera kwa CaO ndi Ca(OH)2 mu imvi ya calcium kungayambitse kutaya ufa. Ngati pali ubale ndi HPMC, ndiye kuti kusasunga bwino madzi kwa HPMC kudzapangitsanso kutaya ufa.
Kodi pali kusiyana kotani pakati pa hydroxypropyl methyl cellulose yosungunuka m'madzi ozizira ndi hydroxypropyl methyl cellulose yosungunuka m'madzi otentha popanga zinthu?
– Yankho: Mtundu wa yankho la madzi ozizira a HPMC nthawi yomweyo ndi pambuyo pokonza pamwamba pa glyoxal, umayikidwa m'madzi ozizira omwe amamwazika mwachangu, koma osasungunuka kwenikweni, kukhuthala kumakwera, ndipo umasungunuka. Mtundu wosungunuka m'madzi sunakonzedwe pamwamba ndi glyoxal. Kuchuluka kwa glyoxal ndi kwakukulu, kufalikira kwake ndi kwachangu, koma kukhuthala kwake ndi pang'onopang'ono, kuchuluka kwake ndi kochepa, m'malo mwake.
Kodi fungo la hydroxypropyl methyl cellulose (HPMC) ndi chiyani?
– Yankho: HPMC yopangidwa ndi njira yosungunulira imapangidwa ndi toluene ndi isopropyl alcohol. Ngati kutsuka sikuli bwino, padzakhala kukoma kotsalira.
Kugwiritsa ntchito kosiyanasiyana, momwe mungasankhire hydroxypropyl methyl cellulose (HPMC) yoyenera?
– yankho: topa ndi kugwiritsa ntchito ufa wa mwana: chofunikira ndi chochepa, kukhuthala 100000, chabwino, ndikofunikira kuteteza madzi kuti akhale pafupi. Kugwiritsa ntchito m'matope: zofunikira kwambiri, kukhuthala kwakukulu, 150000 kuti zikhale bwino. Kugwiritsa ntchito guluu: kufunika kwa zinthu zomwe zingagwiritsidwe ntchito nthawi yomweyo, kukhuthala kwakukulu.
Dzina lina la hydroxypropyl methyl cellulose ndi liti?
– YANKHO: Hydroxypropyl MethylCellulose, Yofupikitsidwa ngati HPMC kapena MHPC, kapena Hydroxypropyl Methyl Cellulose; Cellulose hydroxypropyl methyl ether; Hypromellose, Cellulose, 2-hydroxypropyl methyl Cellulose ether.
HPMC pakugwiritsa ntchito chovala cha Skim, chifukwa chiyani chovala cha Skim chimawala?
Yankho: HPMC mu skim coat, kukhuthala, madzi ndi kapangidwe kake ka ntchito zitatu. Kusachita nawo chilichonse. Zomwe zimayambitsa thovu: 1, madzi ambiri. 2, pansi sipauma, pamwamba pa wosanjikiza wokanda, komanso kosavuta kutulutsa matuza.
Khoma lamkati ndi lakunja. Fomula ya chovala chopanda mafuta?
– yankho: khoma lamkati Utoto wothira mafuta: calcium 800KG calcium imvi 150KG (starch ether, wobiriwira weniweni, peng runtu, citric acid, polyacrylamide zitha kuwonjezeredwa moyenera)
Khoma lakunja Chovala chopanda mafuta: simenti 350KG calcium 500KG mchenga wa quartz 150KG ufa wa latex 8-12kg ether ya cellulose 3KG ether ya starch 0.5kg ulusi wamatabwa 2KG
Kodi kusiyana pakati pa HPMC ndi MC ndi kotani?
– Yankho: MC ndi methyl cellulose, yomwe imapangidwa ndi cellulose ether kudzera muzochita zingapo ndi methane chloride ngati chothandizira kutenthetsa pambuyo poti thonje loyengedwa lakonzedwa ndi alkali. Kawirikawiri, mlingo wa kusintha ndi 1.6 ~ 2.0, ndipo kusungunuka kumasiyana malinga ndi mlingo wa kusintha. Ndi ya nonionic cellulose ether.
(1) Kusunga madzi kwa methyl cellulose kumadalira kuchuluka kwake, kukhuthala, kusalala kwa tinthu tating'onoting'ono ndi kuchuluka kwa kusungunuka. Nthawi zambiri kuwonjezera kuchuluka kwake, kusalala pang'ono, kukhuthala, kuchuluka kwa madzi kumakhala kwakukulu. Pakati pawo, kuchuluka kwa zowonjezera kumakhudza kwambiri kusungidwa kwa madzi, ndipo kukhuthala sikufanana ndi kusungunuka kwa madzi. Kusungunuka kwa madzi kumadalira makamaka pa mlingo wa kusintha kwa pamwamba ndi kusalala kwa tinthu tating'onoting'ono ta tinthu ta cellulose. Mu ma ether angapo a cellulose omwe ali pamwambapa, kuchuluka kwa madzi kwa methyl cellulose ndi hydroxypropyl methyl cellulose kumakhala kwakukulu.
(2) Methyl cellulose imasungunuka m'madzi ozizira, zomwe zimakhala zovuta kusungunuka m'madzi otentha. Madzi ake ndi olimba kwambiri mkati mwa pH=3~12. Imagwirizana bwino ndi starch, guanidine gum ndi ma surfactants ambiri. Gelation imachitika kutentha kukafika pa gelation kutentha.
(3) Kusintha kwa kutentha kudzakhudza kwambiri kuchuluka kwa madzi omwe amasungidwa mu methyl cellulose. Nthawi zambiri, kutentha kukakhala kwakukulu, madzi omwe amasungidwa amakhala oipa kwambiri. Ngati kutentha kwa matope kupitirira 40℃, methyl cellulose imakhala yoipa kwambiri, zomwe zimakhudza kwambiri kapangidwe ka matope.
(4) Methyl cellulose imakhudza kwambiri kapangidwe ndi kumatirira kwa matope. "Kumatirira" apa kumatanthauza kumatira komwe wogwira ntchito amamva pakati pa chida ndi khoma, kutanthauza kukana kukatira kwa matope. Kumatirira ndi kwakukulu, kukana kukatira kwa matope ndi kwakukulu, mphamvu zomwe ogwira ntchito amafunikira pakugwiritsa ntchito ndi zazikulu, ndipo kapangidwe ka matope ndi koipa. Mu zinthu za cellulose ether, kumatira kwa methyl cellulose kuli pamlingo wocheperako.
HPMC hydroxypropyl methyl cellulose, imayengedwa ndi thonje pambuyo pochiza alkali, ndi propylene oxide ndi chloromethane ngati chothandizira kutenthetsa, kudzera muzochita zingapo ndipo imapangidwa ndi non-ionic cellulose mixed ether. Mlingo wa kusintha nthawi zambiri umakhala 1.2 ~ 2.0. Katundu wake amasiyana malinga ndi kuchuluka kwa methoxy ndi hydroxypropyl.
(1) Hydroxypropyl methyl cellulose imasungunuka mosavuta m'madzi ozizira, zomwe zimakhala zovuta kusungunuka m'madzi otentha. Komabe, kutentha kwake kwa gelation m'madzi otentha n'koonekeratu kuti n'kokwera kuposa kwa methyl cellulose. Kusungunuka kwa methyl cellulose m'madzi ozizira nakonso kunakula kwambiri.
(2) Kukhuthala kwa hydroxypropyl methyl cellulose kumakhudzana ndi kulemera kwake kwa mamolekyulu, ndipo kulemera kwa mamolekyulu kukakwera, kukhuthala kumakwera. Kutentha kumakhudzanso kukhuthala. Kukhuthala kumachepa pamene kutentha kukukwera. Koma kukhuthala kwake kutentha kwambiri kumakhala kotsika kuposa kwa methyl cellulose. Yankho lake ndi lokhazikika likasungidwa kutentha kwa chipinda.
(3) Hydroxypropyl methyl cellulose ndi yokhazikika mpaka asidi ndi maziko, ndipo yankho lake lamadzi ndi lokhazikika kwambiri pa pH = 2 ~ 12. Caustic soda ndi madzi a laimu sizikhudza kwambiri mphamvu zake, koma alkali imatha kufulumizitsa kusungunuka kwake ndikuwonjezera kukhuthala. Hydroxypropyl methyl cellulose ndi yokhazikika mpaka mchere wamba, koma pamene mchere uli wambiri, kukhuthala kwa yankho la hydroxypropyl methyl cellulose kumawonjezeka.
(4) Kusunga madzi kwa hydroxypropyl methyl cellulose kumadalira mlingo wake ndi kukhuthala kwake, ndipo kuchuluka kwa madzi kwa hydroxypropyl methyl cellulose kumakhala kwakukulu kuposa kwa methyl cellulose pa mlingo womwewo.
(5) Hydroxypropyl methyl cellulose ikhoza kusakanikirana ndi mankhwala a polymer osungunuka m'madzi kuti ikhale yofanana komanso yokhuthala kwambiri. Monga polyvinyl alcohol, starch ether, guluu wa masamba ndi zina zotero.
(6) Kugwirizana kwa hydroxypropyl methyl cellulose ku matope opangidwa ndi matope n'kokwera kuposa kwa methyl cellulose.
(7) Hydroxypropyl methyl cellulose ili ndi kukana bwino kwa ma enzyme kuposa methyl cellulose, ndipo kuthekera kwake kwa kuwonongeka kwa ma enzyme ndi kochepa kuposa kwa methyl cellulose.
Kodi ndi chiyani chomwe chiyenera kuganiziridwa pogwiritsira ntchito zenizeni zokhudza ubale pakati pa kukhuthala ndi kutentha kwa HPMC?
Yankho: KUkhuthala kwa HPMC kumagwirizana ndi kutentha, kutanthauza kuti, kukhuthala kumawonjezeka ndi kuchepa kwa kutentha. Tikamalankhula za kukhuthala kwa chinthu, tikulankhula za kukhuthala kwa 2% ya chinthucho m'madzi pa madigiri 20 Celsius.
Pogwira ntchito, m'madera omwe kutentha kwake kuli kosiyana kwambiri pakati pa chilimwe ndi nyengo yozizira, ziyenera kudziwika kuti ndibwino kugwiritsa ntchito kukhuthala kochepa m'nyengo yozizira, zomwe zimathandiza kwambiri pakupanga. Kupanda kutero, kutentha kukachepa, kukhuthala kwa cellulose kudzawonjezeka, ndipo pokanda, kumveka kumakhala kolemera.
Kukhuthala kwapakati: 75000-100000 makamaka kumagwiritsidwa ntchito popaka putty
Chifukwa: Kusunga bwino madzi
Kukhuthala kwakukulu: HPMC 150000-200000 imagwiritsidwa ntchito makamaka pa polystyrene tinthu tating'onoting'ono tomwe timateteza matope, tinthu tating'onoting'ono tomwe timateteza matope, ndi zinthu zina monga ufa wa guluu, komanso matope oteteza matope okhala ndi mikanda ya vitrified.
Chifukwa: kukhuthala kwakukulu, matope sali osavuta kugwetsa, kuyenda kwa madzi kumapachikidwa, kukonza kapangidwe kake.
Koma nthawi zambiri, kukhuthala kwakukulu, kusunga madzi kumakhala bwino, motero mafakitale ambiri ouma, poganizira mtengo, amagwiritsa ntchito ma HPMC cellulose apakatikati (75000-100000) kuti alowe m'malo mwa ma HPMC cellulose apakatikati ndi otsika (20000-40000) kuti achepetse kuchuluka kwa kuwonjezera.
Nthawi yotumizira: Januwale-10-2022