1. Kodi ntchito yaikulu ya cellulose ndi yotani?
HPMCimagwiritsidwa ntchito kwambiri pa zipangizo zomangira, zokutira, utomoni wopangidwa, zoumba, mankhwala, chakudya, nsalu, ulimi, zodzoladzola, fodya ndi mafakitale ena. HPMC ikhoza kugawidwa m'magulu a mafakitale, magulu a chakudya ndi magulu a mankhwala malinga ndi momwe imagwiritsidwira ntchito.
2. Pali mitundu ingapo ya cellulose, ndipo kodi ntchito zake zimasiyana bwanji?
HPMC ingagawidwe m'magulu awiri: mtundu wa instant (dzina la brand suffix "S") ndi mtundu wa hot-melt. Zinthu za instant-type zimafalikira mofulumira m'madzi ozizira ndipo zimasowa m'madzi. Panthawiyi, madziwo alibe kukhuthala chifukwa HPMC imangofalikira m'madzi popanda kusungunuka kwenikweni. Pafupifupi (kusakaniza) kwa mphindi ziwiri, kukhuthala kwa madziwo kumawonjezeka pang'onopang'ono, ndikupanga colloid yoyera yowoneka bwino. Zinthu za hot-melt, zikakumana ndi madzi ozizira, zimatha kufalikira mwachangu m'madzi otentha ndikusowa m'madzi otentha. Kutentha kukatsika kufika pa kutentha kwina (malinga ndi kutentha kwa gel kwa chinthucho), kukhuthala kudzawonekera pang'onopang'ono mpaka kupanga colloid yowoneka bwino yowoneka bwino.
3. Kodi njira zosungunula cellulose ndi ziti?
1) Mitundu yonse ikhoza kuwonjezeredwa ku zinthuzo posakaniza mouma;
2). Ngati ikufunika kuwonjezeredwa mwachindunji ku madzi otentha bwino, ndi bwino kugwiritsa ntchito mtundu wa kufalikira kwa madzi ozizira. Nthawi zambiri zimatenga mphindi 1-30 kuti zikhuthale mutaziwonjezera (sakanizani ndikusakaniza)
3) Ma model wamba amayamba kusakanizidwa ndi madzi otentha, kenako amasungunuka m'madzi ozizira akasakaniza ndi kuziziritsa;
4). Ngati kusonkhana kumachitika panthawi yosungunuka, ndi chifukwa chakuti kusakaniza sikukwanira kapena chitsanzo chachizolowezi chimawonjezeredwa mwachindunji m'madzi ozizira. Pakadali pano, chiyenera kusunthidwa mwachangu.
5). Ngati thovu lipangidwa panthawi yosungunuka, likhoza kusiyidwa kuti liyime kwa maola 2-12 (nthawi yeniyeniyo imatsimikiziridwa ndi kukhazikika kwa yankho) kapena kuchotsedwa mwa kutsuka vacuum, kupondereza, ndi zina zotero, ndipo kuchuluka koyenera kwa mankhwala ochotsera poizoni kungawonjezedwenso.
4. Kodi mungaweruze bwanji ubwino wa cellulose mosavuta komanso mwachilengedwe?
1) Kuyera, ngakhale kuti kuyera sikungathe kudziwa ngati HPMC ndi yosavuta kugwiritsa ntchito, ndipo ngati zinthu zoyera ziwonjezedwa popanga, zidzakhudza ubwino wake, koma zinthu zambiri zabwino zimakhala ndi kuyera kwabwino.
2) Kusalala: Kusalala kwaHPMCKawirikawiri imakhala ndi maukonde 80 ndi maukonde 100, maukonde 120 ndi ochepa, ndipo akamachepa kwambiri amakhala abwino kwambiri.
3) Kutumiza kuwala: HPMC ikayikidwa m'madzi kuti ipange colloid yowonekera, yang'anani momwe kuwala kwake kumayendera. Kutumiza kuwala kukakhala kwakukulu, kumakhala bwino, zomwe zikusonyeza kuti mulibe zinthu zambiri zosasungunuka, ndipo kutumiza kwa ma reactor olunjika nthawi zambiri kumakhala bwino. , Reactor yopingasa imakhala yoipa, koma sizikutanthauza kuti mtundu wa reactor yopingasa ndi wabwino kuposa wa reactor yopingasa, ndipo pali zinthu zambiri zomwe zimatsimikizira mtundu wa chinthucho.
4) Mphamvu yokoka: Mphamvu yokoka ikakhala yayikulu, kulemera kwake kumakhala bwino. Mphamvu yokoka ikakhala yayikulu, kuchuluka kwa hydroxypropyl mu chinthucho kumakhala kwakukulu. Mphamvu yokoka ikakhala yayikulu, kuchuluka kwa hydroxypropyl mu chinthucho kumakhala bwino. Mphamvu yokoka ikakhala yayikulu, kuchuluka kwa madzi kumasungidwa bwino.
5. Kodi kuchuluka kwa cellulose mu ufa wa putty ndi kotani?
Kuchuluka kwa HPMC komwe kumagwiritsidwa ntchito pa ntchito zenizeni kumakhudzidwa ndi nyengo, kutentha, mtundu wa calcium ya phulusa, kapangidwe ka ufa wa putty ndi mtundu womwe makasitomala amafunikira. Pali kusiyana m'malo osiyanasiyana, makamaka, ndi pakati pa 4-5 kg.
6. Kodi kukhuthala koyenera kwa selulosi ndi kotani?
Kawirikawiri, ufa wa putty 100,000 ndi wokwanira, ndipo kufunikira mu matope ndikokwera, ndipo kumafunika 150,000 kuti ukhale wosavuta kugwiritsa ntchito. Kuphatikiza apo, ntchito yofunika kwambiri ya HPMC ndikusunga madzi, kutsatiridwa ndi kukhuthala. Mu ufa wa putty, bola ngati kusunga madzi kuli bwino ndipo kukhuthala kuli kochepa (7-8), n'zothekanso. Zachidziwikire, kukhuthala kwakukulu, kukhuthala kumakhala bwino. Kukhuthala kukapitirira 100,000, kukhuthala sikukhudza kusunga madzi.
7. Kodi zizindikiro zazikulu zaukadaulo za cellulose ndi ziti?
Kuchuluka kwa hydroxypropyl
Kuchuluka kwa Methyl
kukhuthala
Phulusa
Kutayika pakuuma
8. Kodi zinthu zazikulu zopangira cellulose ndi ziti?
Zipangizo zazikulu za HPMC: thonje loyengedwa, methyl chloride, propylene oxide, madzi a caustic soda, ndi zina zotero.
9. Kodi ntchito yaikulu ya cellulose mu ufa wa putty ndi yotani? Kodi pali mankhwala aliwonse omwe amapangidwa?
Pakati pa ufa wa putty, umagwira ntchito zitatu monga kukhuthala, kusunga madzi ndi kumanga. Kukhuthala, cellulose imatha kukhuthala kuti iimirire, kusunga yankholo kukhala lofanana mmwamba ndi pansi, komanso kupewa 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 imangokhala ndi gawo lothandizira.
10. Cellulose ndi ether ya cellulose yosakhala ionic, ndiye kodi non-ionic ndi chiyani?
Mwachidule, zinthu zopanda mphamvu sizigwira ntchito mu zochita za mankhwala.
CMC (carboxymethyl cellulose) ndi cationic cellulose, kotero imasanduka nyemba curd ikakumana ndi phulusa la calcium.
11 Kodi kutentha kwa gel kwa cellulose 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 kutayika kwa ufa wa putty ndi cellulose?
Pali ubale! ! ! Izi zikutanthauza kuti, kusasunga bwino madzi a HPMC kudzapangitsa kuti ufa utathe (zomwe zili mu zipangizo monga phulusa, calcium yochuluka, ndi simenti, kutentha kwa zomangamanga, ndi momwe khoma lilili zidzakhudzidwira).
13. Kodi kusiyana pakati pa cellulose yosungunuka ya madzi ozizira ndi cellulose yosungunuka yotentha ndi kotani pakupanga?
Mtundu wa HPMC wozizira nthawi yomweyo umathiridwa ndi glyoxal pamwamba, ndipo umafalikira mofulumira m'madzi ozizira, koma susungunuka kwenikweni. Umasungunuka kokha pamene kukhuthala kwa madzi kukukwera. Mitundu yosungunuka yotentha siithiridwa ndi glyoxal pamwamba. Ngati kuchuluka kwa glyoxal kuli kwakukulu, kufalikira kwa madzi kudzakhala kofulumira, koma kukhuthala kudzawonjezeka pang'onopang'ono, ndipo ngati kuchuluka kuli kochepa, zosiyana ndi zimenezo zidzakhala zoona.
14. N’chifukwa chiyani cellulose imakhala ndi fungo loipa?
HPMC yopangidwa ndi njira yosungunulira imagwiritsa ntchito toluene ndi isopropanol ngati zosungunulira. Ngati kutsuka sikuli bwino, padzakhala fungo lotsalira. (Kubwezeretsa fungo losasinthika ndiye njira yofunika kwambiri yopangira fungo)
15. Kodi mungasankhe bwanji cellulose yoyenera kugwiritsa ntchito pazifukwa zosiyanasiyana?
Ufa wa putty: umafuna madzi ambiri osungira, komanso wosavuta kumanga
Simenti yamba yopangidwa ndi simenti: imafuna madzi ambiri osungira, kukana kutentha kwambiri, komanso kukhuthala nthawi yomweyo
Kugwiritsa ntchito guluu womangira: zinthu zomwe zimagwira ntchito mwachangu komanso zokhuthala kwambiri. (muyeso woyenera)
Dothi la gypsum: kusunga madzi ambiri, kukhuthala kwapakati ndi kochepa, kuwonjezeka kwa kukhuthala nthawi yomweyo
16. Dzina lina la cellulose ndi liti?
Amatchedwa HPMC kapena MHPC dzina lake hypromellose, cellulose hydroxypropyl methyl ether.
17. Kugwiritsa ntchito cellulose mu ufa wa putty, kodi chifukwa chake ma thovu mu ufa wa putty ndi chiyani?
Mu ufa wa putty, HPMC imagwira ntchito zitatu monga kukhuthala, kusunga madzi ndi kupanga. Zifukwa za thovu ndi izi:
1. Madzi ochulukirapo amawonjezedwa.
2. Gawo la pansi silili louma, ingokandani gawo lina pamwamba, ndipo n'zosavuta kupatsa thovu.
18. Kodi kusiyana pakati pa cellulose ndi MC ndi kotani:
MC ndi methyl cellulose, yomwe imapangidwa ndi cellulose ether pochiza thonje loyengedwa ndi alkali, pogwiritsa ntchito methane chloride ngati etherification, ndikuchitidwa zinthu zosiyanasiyana. Kawirikawiri, mlingo wa kusintha ndi 1.6-2.0, ndipo kusungunuka kumasiyana malinga ndi madigiri osiyanasiyana a kusintha. Mosiyana, ndi ya non-ionic cellulose ether.
(1) Kusunga madzi kwa methylcellulose kumadalira kuchuluka kwake kowonjezera, kukhuthala, kusalala kwa tinthu ndi kuchuluka kwa kusungunuka. Kawirikawiri, ngati kuchuluka kowonjezera kuli kwakukulu, kusalala kwake kuli kochepa, ndipo kukhuthala kwake kuli kwakukulu, kuchuluka kwa kusungunuka kwa madzi kumakhala kwakukulu. Pakati pawo, kuchuluka kowonjezera kumakhudza kwambiri kuchuluka kwa madzi omwe anthu amasunga. Kukhuthala sikufanana ndi kuchuluka kwa madzi omwe amasunga. Kusungunuka kwake kumadalira makamaka pamwamba pa tinthu ta cellulose. Mlingo wa kusintha ndi kusalala kwa tinthu. Pakati pa ma ether angapo a cellulose omwe ali pamwambapa, kuchuluka kwa madzi omwe methyl cellulose ndi Jinshuiqiao cellulose ndi okwera.
(2) Methylcellulose imasungunuka m'madzi ozizira, ndipo zimakhala zovuta kusungunuka m'madzi otentha. Madzi ake amchere ndi okhazikika kwambiri pakati pa ph=3-12. Amagwirizana bwino ndi starch, ndi zina zotero. ndi ma surfactants ambiri. Kutentha kukafika kutentha kwa gelation, gelation imachitika.
(3) Kusintha kwa kutentha kudzakhudza kwambiri kuchuluka kwa madzi omwe amasungidwa mu methyl cellulose. Nthawi zambiri, kutentha kukakhala kwakukulu, kuchuluka kwa madzi omwe amasungidwa kumakhala koipa kwambiri. Ngati kutentha kwa matope kupitirira madigiri 40, kuchuluka kwa madzi omwe amasungidwa mu methyl cellulose kudzachepa kwambiri, zomwe zidzakhudza kwambiri kapangidwe ka matopewo.
(4)Methyl celluloseKumamatira kumakhudza kwambiri kapangidwe ndi kumatirira kwa matope. Kumatirira apa kumatanthauza mphamvu yomatira yomwe imamveka pakati pa chida chogwiritsira ntchito cha wantchito ndi khoma, ndiko kuti, kukana kukakamira kwa matope. Kumatira kwake ndi kwakukulu, kukana kukakamira kwa matope ndi kwakukulu, ndipo mphamvu zomwe ogwira ntchito amafunikira pakugwiritsa ntchito matope ndi zazikulu, ndipo ntchito yomanga matope ndi yoipa.
Nthawi yotumizira: Epulo-25-2024