Focus on Cellulose ethers

Kodi HPMC imagwiritsidwa ntchito bwanji?

HPMC chimagwiritsidwa ntchito zomangamanga, zokutira, utomoni kupanga, zoumba, mankhwala, chakudya, nsalu, ulimi, zodzoladzola, fodya ndi mafakitale ena. HPMC akhoza kugawidwa mu kalasi mafakitale, chakudya kalasi ndi mankhwala kalasi malinga ndi ntchito.

Kodi mlingo wa HPMC mu putty powder ndi wotani?

Kuchuluka kwa HPMC komwe kumagwiritsidwa ntchito pochita ntchito kumakhudzidwa ndi nyengo, kutentha, khalidwe la calcium phulusa la m'deralo, ndondomeko ya ufa wa putty ndi khalidwe lofunidwa ndi makasitomala. Pali kusiyana m'malo osiyanasiyana, nthawi zambiri, ndi pakati pa 4-5 kg.

Kodi kukhuthala koyenera kwa hydroxypropyl methylcellulose ndi chiyani?

Nthawi zambiri, 100,000 putty ufa ndi wokwanira, ndipo zofunikira mumatope ndizokwera, ndipo zimafunika 150,000 kuti zikhale zosavuta kugwiritsa ntchito. Komanso, ntchito yofunika kwambiri ya HPMC ndi kusunga madzi, kenako thickening. Mu putty ufa, bola ngati kusungirako madzi kuli bwino komanso kukhuthala kuli kochepa (7-8), ndizothekanso. Zoonadi, kukwezeka kwa viscosity kumapangitsa kuti madzi azikhala bwino. Pamene mamasukidwe akayendedwe kuposa 100,000, mamasukidwe akayendedwe alibe mphamvu pa kusunga madzi. chachikulu.

Kodi zizindikiro zazikulu za hydroxypropyl methylcellulose ndi ziti?

Zomwe zili ndi hydroxypropyl

Zomwe zili mu Methyl

mamasukidwe akayendedwe

Phulusa

Kutaya pakuyanika

Kodi zida zazikulu za hydroxypropyl methylcellulose ndi ziti?

Zida zazikulu za HPMC: thonje woyengedwa, methyl chloride, propylene oxide, zopangira zina, caustic koloko, asidi toluene.

Kodi ntchito yayikulu yogwiritsira ntchito hydroxypropyl methylcellulose mu putty powder ndi yotani, ndipo zimachitika mwamankhwala?

Pakati pa putty powder, imagwira ntchito zitatu za thickening, kusunga madzi ndi kumanga. Kukhuthala, cellulose imatha kukhuthala kuti iyime, kusunga 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.

Hydroxypropyl methylcellulose ndi non-ionic cellulose ether, ndiye non-ionic ndi chiyani?

M'mawu a layman, zinthu za inert sizitenga nawo gawo pamachitidwe amankhwala.

CMC (carboxymethyl cellulose) ndi cellulose ya cationic, motero imasandulika kukhala nyemba ikakumana ndi phulusa la calcium.

Kodi kutentha kwa gel wa hydroxypropyl methylcellulose kumakhudzana bwanji?

Kutentha kwa gel osakaniza a HPMC kumagwirizana ndi zomwe zili mu methoxy, kutsika kwa methoxy, kumapangitsa kutentha kwa gel.

Kodi pali ubale uliwonse pakati pa dontho la putty powder ndi hydroxypropyl methylcellulose?

Pali maubale! ! ! Ndiko kusungidwa kwa madzi kosauka kwa HPMC, komwe kungayambitse kutayika kwa ufa.

Kodi pali kusiyana kotani pakati pa mitundu yamadzi ozizira nthawi yomweyo ndi yotentha yosungunuka ya hydroxypropyl methylcellulose popanga?

Madzi ozizira amtundu wa HPMC amathiridwa pamwamba ndi glyoxal, ndipo amabalalika m'madzi ozizira, koma samasungunuka kwenikweni. Imasungunuka kokha pamene mamasukidwe akayendedwe akuwonjezeka. Mitundu yotentha yosungunula sichimathandizidwa ndi glyoxal. Ngati kuchuluka kwa glyoxal kuli kwakukulu, kubalalitsidwa kudzakhala kofulumira, koma kukhuthala kumawonjezeka pang'onopang'ono, ndipo ngati kuchuluka kwake kuli kochepa, zosiyana zidzakhala zoona.

Kodi fungo la hydroxypropyl methylcellulose ndi chiyani?

HPMC yopangidwa ndi njira yosungunulira imagwiritsa ntchito toluene ndi isopropanol ngati zosungunulira. Ngati kusamba sikuli bwino, padzakhala fungo lotsalira. (Neutralization recovery is the key process of fungo)

momwe mungasankhire hydroxypropyl methylcellulose yoyenera?

Ufa wa Putty: umafunika kusungirako madzi ambiri, kumasuka kwa zomangamanga

Mtondo wamba wopangidwa ndi simenti: umafunika kusunga madzi ambiri, kukana kutentha kwambiri, komanso kukhuthala pompopompo (

Kugwiritsa ntchito guluu womanga: zinthu pompopompo zokhala ndi kukhuthala kwakukulu.

Mtondo wa Gypsum: kusungirako madzi ambiri, kukhuthala kwapakati ndi otsika, kukhathamiritsa kwakanthawi kochepa

Kodi 16 hydroxypropyl methylcellulose ndi chiyani?

Amatchedwa HPMC kapena MHPC alias hypromellose, cellulose hydroxypropyl methyl ether.

Kugwiritsiridwa ntchito kwa hydroxypropyl methylcellulose mu putty powder, chifukwa chiyani mpweya wa thovu mu putty ufa?

Mu putty powder, HPMC imagwira ntchito zitatu zokulitsa, kusunga madzi ndi kumanga. Zifukwa za bubbles ndi:

(1) Amathiridwa madzi ambiri.

(2) Chigawo chapansicho chikapanda kuuma, pala chinanso pamwamba, ndipo sichichita thovu.

Kodi pali kusiyana kotani pakati pa hydroxypropyl methylcellulose ndi MC:

MC ndi methyl cellulose, yomwe imapangidwa ndi cellulose ether pochiza thonje woyengedwa ndi alkali, kugwiritsa ntchito methane chloride ngati etherification agent, ndikuchita zingapo zingapo. Nthawi zambiri, mlingo woloweza m'malo ndi 1.6-2.0, ndipo kusungunuka kwake kumasiyana mosiyanasiyana. Mosiyana, ndi ya non-ionic cellulose ether.

(1) Kusungidwa kwa madzi kwa methylcellulose kumadalira kuchuluka kwake, kukhuthala, kukongola kwa tinthu ndi kusungunuka kwake. Nthawi zambiri, ngati kuchuluka kwake kuli kwakukulu, fineness ndi yaying'ono, ndipo mamasukidwe ake ndiakuluakulu, kuchuluka kwa kusunga madzi kumakhala kwakukulu. Pakati pawo, kuchuluka kwake kumakhudza kwambiri kuchuluka kwa madzi osungira anthu. Kukhuthala kwake sikufanana ndi kuchuluka kwa kusunga madzi. Mlingo wa kuwonongeka makamaka zimadalira pamwamba pa mapadi particles. Digiri ya kusinthidwa ndi particle fineness. Pakati pa ma cellulose ethers omwe ali pamwambawa, methyl cellulose ndi hydroxypropyl methyl cellulose ali ndi milingo yayikulu yosungira madzi.

(2) Methylcellulose imasungunuka m'madzi ozizira, ndipo zimakhala zovuta kusungunuka m'madzi otentha. Yankho lake lamadzi ndi lokhazikika pamlingo wa ph = 3-12. Iwo ali ngakhale wabwino ndi wowuma, etc. ndi surfactants ambiri. Kutentha Pamene kutentha kwa gelation kufika, gelation idzachitika.

(3) Kusintha kwa kutentha kudzakhudza kwambiri kuchuluka kwa madzi osungira madzi a methyl cellulose. Nthawi zambiri, kutentha kukakhala kokwera, madzi amasunga kwambiri. Ngati kutentha kwa matope kupitirira madigiri 40, kusungidwa kwa madzi kwa methyl cellulose kudzachepetsedwa kwambiri, zomwe zidzakhudza kwambiri kumanga matope.

(4) Methyl cellulose imakhudza kwambiri pomanga ndi kumamatira matope. Kumamatira apa kumatanthauza mphamvu yomatira yomwe imamveka pakati pa chida cha wogwiritsa ntchito ndi gawo lapansi la khoma, ndiko kuti, kukana kukameta ubweya wa matope. Kumatira kumakhala kwakukulu, kukana kukameta ubweya wa matope ndi kwakukulu, ndipo mphamvu zomwe ogwira ntchito amafunikira pakugwiritsa ntchito ndizokulirapo, ndipo kumanga matope ndi osauka.

Hydroxypropyl methylcellulose imagawidwa m'mitundu ingapo, ndipo pali kusiyana kotani pakugwiritsa ntchito kwawo?

HPMC akhoza kugawidwa mu mtundu pompopompo (mtundu dzina suffix "S") ndi otentha-kusungunuka mtundu. Mankhwala amtundu wanthawi yomweyo amamwazikana mwachangu m'madzi ozizira ndikulowa m'madzi. Panthawi imeneyi, madzi alibe mamasukidwe akayendedwe chifukwa HPMC okha omwazika m'madzi popanda kuvunda kwenikweni. Pafupifupi (kuyambitsa) kwa mphindi ziwiri, kukhuthala kwamadzimadzi kumawonjezeka pang'onopang'ono, ndikupanga mawonekedwe oyera a viscous colloid. Zogulitsa zotentha zotentha, zikakumana ndi madzi ozizira, zimatha kufalikira mofulumira m'madzi otentha ndikuzimiririka m'madzi otentha. Kutentha kumatsika mpaka kutentha kwina (malinga ndi kutentha kwa gel osakaniza), kukhuthala kumawonekera pang'onopang'ono mpaka kumapanga mawonekedwe a viscous colloid.

Kodi njira zosungunulira za hydroxypropyl methylcellulose ndi ziti?

1) Zitsanzo zonse zikhoza kuwonjezeredwa kuzinthu ndi njira yosakaniza youma;

2) Ikafunika kuwonjezeredwa mwachindunji kumadzi otentha amadzimadzi, ndi bwino kugwiritsa ntchito mtundu wobalalika wamadzi ozizira, ndipo nthawi zambiri zimatenga mphindi 10-90 kuti zikhwime mutatha kuwonjezera (kuyambitsa ndi kusonkhezera)

3) Mtundu wamba umagwedezeka ndikumwaza ndi madzi otentha poyamba, ndiye ukhoza kusungunuka mutatha kuwonjezera madzi ozizira kuti agwedeze ndi kuziziritsa;

4) Ngati agglomeration ndi kukulunga kumachitika panthawi ya kusungunuka, ndichifukwa chakuti kugwedeza sikukwanira kapena chitsanzo wamba chimawonjezedwa mwachindunji kumadzi ozizira. Panthawi imeneyi, iyenera kugwedezeka mwamsanga. ndi

5) Ngati thovu limapangidwa panthawi ya kusungunuka, limatha kusiyidwa kuti liyime kwa maola 2-12 (nthawi yeniyeniyo imatsimikiziridwa ndi kugwirizana kwa yankho) kapena kuchotsedwa ndi vacuuming, pressurizing, etc., kapena kuchuluka koyenera kwa defoaming wothandizira. akhoza kuwonjezeredwa. ndi

Momwe mungaweruzire mtundu wa hydroxypropyl methylcellulose mosavuta komanso mwachilengedwe?

1) Kuyera, ngakhale kuyera sikungadziwe ngati HPMC ndi yosavuta kugwiritsa ntchito, ndipo ngati zopangira zoyera zikuwonjezeredwa pakupanga, zimakhudza ubwino wake, koma zabwino zambiri zimakhala ndi zoyera zabwino.

2) Ubwino: Ubwino wa HPMC nthawi zambiri umakhala ndi mauna 80 ndi mauna 100, mauna 120 ndi ocheperako, kuwongolera kumakhala bwinoko.

3) Kutumiza kwa kuwala: Pambuyo pa HPMC kuyikidwa m'madzi kuti apange colloid yowonekera, yang'anani kuwala kwake. Kuchuluka kwa ma transmittance a kuwala, ndikwabwinoko, kusonyeza kuti mulibe ma insolubles ochepa mmenemo, ndipo ma transmittance of vertical reactors nthawi zambiri amakhala abwino. , The yopingasa riyakitala ndi zoipa, koma sizikutanthauza kuti khalidwe ofukula riyakitala ndi bwino kuposa ya yopingasa riyakitala, ndipo pali zinthu zambiri kudziwa khalidwe mankhwala.

4) Kukoka kwapadera: Kukula kwa mphamvu yokoka kwapadera, ndikolemera kwambiri. Kuchuluka kwa mphamvu yokoka, m'pamenenso hydroxypropyl ili pamwamba pa mankhwala. Kukwera kwa hydroxypropyl kumapangitsa kuti madzi asungidwe bwino.


Nthawi yotumiza: Nov-24-2022
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