Yankho la HPMC

1, kodi ntchito yaikulu ya hydroxypropyl methyl cellulose (HPMC) ndi yotani?

Yankho:HPMCimagwiritsidwa ntchito kwambiri mu zipangizo zomangira, zokutira, ma resini opangidwa, zoumba, mankhwala, chakudya, nsalu, ulimi, zodzoladzola, fodya ndi mafakitale ena. HPMC ikhoza kugawidwa m'magulu awa: kalasi yomanga, kalasi ya chakudya ndi kalasi ya zamankhwala malinga ndi kagwiritsidwe ntchito. Pakadali pano, zopangidwa kunyumba nthawi zambiri zimakhala pamlingo womanga, pamlingo womanga, kuchuluka kwa ufa wa putty ndi kwakukulu kwambiri, pafupifupi 90% imagwiritsidwa ntchito popanga ufa wa putty, yotsalayo imagwiritsidwa ntchito popanga matope a simenti ndi guluu.

2, hydroxypropyl methyl cellulose (HPMC) imagawidwa m'mitundu ingapo, kodi kusiyana kwake ndi kotani?

Yankho: HPMC ingagawidwe m'magulu awiri: zinthu zosungunuka nthawi yomweyo ndi kutentha, zinthu zosungunuka nthawi yomweyo, m'madzi ozizira zimafalikira mwachangu, zimasowa m'madzi, panthawiyi madziwo alibe kukhuthala, chifukwa HPMC imangofalikira m'madzi, palibe kusungunuka kwenikweni. Pafupifupi mphindi ziwiri, kukhuthala kwa madziwo kumawonjezeka pang'onopang'ono, ndikupanga colloid yowoneka bwino. Zinthu zosungunuka kutentha, mu agglomeration ya madzi ozizira, zimatha kukhala m'madzi otentha, zimafalikira mwachangu, zimasowa m'madzi otentha, mpaka kutentha kutsika kufika kutentha kwina, kukhuthala pang'onopang'ono kumawonekera, mpaka kupangika kwa colloid yowoneka bwino. Mtundu wosungunuka kutentha ungagwiritsidwe ntchito mu ufa wa putty ndi matope, mu guluu wamadzimadzi ndi zokutira, zitha kuwoneka zochitika za agglomeration, sizingagwiritsidwe ntchito. Chitsanzo chosungunuka nthawi yomweyo, kuchuluka kwa ntchito ndi kochepa, kukhala wotopa ndi ufa wa mwana ndi matope, ndipo mu guluu wamadzimadzi ndi zokutira, zonse zitha kugwiritsidwa ntchito, mulibe taboo.

3, njira zosungunula za hydroxypropyl methyl cellulose (HPMC) zili ndi zimenezo?

– yankho: njira yosungunula madzi otentha: chifukwa HPMC siisungunuka m'madzi otentha, kotero HPMC yoyambirira imatha kufalikira mofanana m'madzi otentha, kenako nkusungunuka mwachangu ikazizira, njira ziwiri zodziwika bwino zafotokozedwa motere:

1) Dzazani chidebecho ndi madzi otentha okwanira momwe mukufunira ndipo chitenthetseni kufika pa 70℃. Hydroxypropyl methyl cellulose imawonjezedwa pang'onopang'ono mukasakaniza pang'onopang'ono, ndipo HPMC imayandama pamwamba pa madzi, kenako pang'onopang'ono imapanga matope, omwe amaziziritsidwa mukasakaniza.

2) Onjezani theka la theka kapena theka la madzi ofunikira mu chidebecho ndikutenthetsa mpaka madigiri 70 Celsius. Mwazani HPMC motsatira njira 1) kuti mukonze slurry ya madzi otentha; Kenako onjezerani madzi ozizira otsalawo mu slurry ya madzi otentha ndikuziziritsa chisakanizocho mutasakaniza.

Njira yosakanizira ufa: Ufa wa HPMC ndi zosakaniza zina zambiri za ufa, zosakaniza bwino ndi blender, kenako onjezerani madzi kuti zisungunuke, panthawiyi HPMC ikhoza kusungunuka, osati kusonkhana, chifukwa ngodya iliyonse yaying'ono, ufa wochepa wa HPMC, madzi amasungunuka nthawi yomweyo. – Opanga ufa wa putty ndi matope amagwiritsa ntchito njira iyi. [Hydroxypropyl methyl cellulose (HPMC) imagwiritsidwa ntchito ngati chowonjezera kukhuthala ndi chosungira madzi mu matope a putty powder.

4, momwe mungadziwire mtundu wa hydroxypropyl methyl cellulose (HPMC) wosavuta komanso wosavuta kuzindikira?

Yankho: (1) kuyera: ngakhale kuyera sikungathe kudziwa ngati HPMC ndi yabwino, ndipo ngati iwonjezeredwa mu njira yopangira, choyeracho chidzakhudza ubwino wake. Komabe, zinthu zambiri zabwino zimakhala ndi kuyera kwabwino. (2) kusalala: Kusalala kwa HPMC nthawi zambiri kumakhala ndi ma mesh 80 ndi ma mesh 100, 120 cholinga chocheperako, Hebei HPMC makamaka ma mesh 80, kusalala kwabwino kwambiri, nthawi zambiri, kumakhala bwino. (3) kutumiza: hydroxypropyl methyl cellulose (HPMC) m'madzi, kupangidwa kwa colloid yowonekera, kuwona kutumiza kwake, kutumiza kumakhala kwakukulu, zinthu zosasungunuka mkati mwake zimakhala zochepa. Kutumiza kwa choyatsira choyima nthawi zambiri kumakhala kwabwino, ndipo kwa choyatsira choyima ndi koipa, koma sizitanthauza kuti mtundu wa kupanga choyatsira choyima ndi wabwino kuposa wa choyatsira choyima. Pali zinthu zambiri zodziwira mtundu wa chinthucho. (4) Kuchuluka: kuchuluka kwakukulu, kulemera kumakhala bwino. Kuposa chachikulu, chifukwa chakuti mkati mwa hydroxyl propyl base muli zambiri, hydroxyl propyl base muli zambiri, zomwe zimathandiza kuti madzi azitetezedwa bwino.

5, kukhuthala kwa hydroxypropyl methyl cellulose (HPMC) ndikoyenera kwambiri?

– yankho: kutopa ndi ufa wa mwana nthawi zambiri kumakhala 100,000,000, ena kutalika kuposa momwe amafunikira mu matope, kumafuna 150,000,000 kuti mugwiritse ntchito. Komanso, HPMC ndiye gawo lofunika kwambiri pakusunga madzi, kutsatiridwa ndi kukhuthala. Mu ufa wa putty, bola ngati kusunga madzi kuli bwino, kukhuthala kumakhala kochepa (7-80,000), n'zothekanso, ndithudi, kukhuthala kumakhala kwakukulu, kusungunuka kwa madzi kumakhala bwino, pamene kukhuthala kuli koposa 100,000, kukhuthala kwa kusunga madzi sikokwanira.

6, hydroxypropyl methyl cellulose (HPMC) zizindikiro zazikulu zaukadaulo 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.

7, 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.

8, HPMC pogwiritsira ntchito ufa wa putty, udindo waukulu, kaya pali chemistry yotani?

Yankho: HPMC mu ufa wa putty, kukhuthala, madzi ndi kapangidwe kake ka ntchito zitatu. Kukhuthala: cellulose ikhoza kukhuthala mpaka kuyimitsidwa, kotero kuti yankho likhalebe lofanana mmwamba ndi pansi monga ntchito yoletsa kuyenda kwa madzi. Kusunga madzi: kumapangitsa ufa wa putty kuumitsa pang'onopang'ono, calcium yothandiza yochokera ku imvi pochitapo kanthu pakuchitapo kanthu kwa madzi. Kapangidwe: mafuta a cellulose, angapangitse ufa wa putty kukhala ndi kapangidwe kabwino. HPMC sichita nawo machitidwe aliwonse a mankhwala, koma imangogwira ntchito yothandizira. Ufa wa putty ndi madzi, pakhoma, ndi njira ya mankhwala, chifukwa cha kupanga zinthu zatsopano, khoma la ufa wa putty limatsika kuchokera pakhoma, kuphwanyidwa kukhala ufa, kenako nkugwiritsa ntchito, osati bwino, chifukwa chapanga chinthu chatsopano (calcium carbonate). Kapangidwe kake ka ufa wa imvi ndi chisakanizo cha Ca(OH)2,CaO ndi CaCO3,CaO+H2O=Ca(OH)2 — Ca(OH)2+CO2=CaCO3↓+H2O Kalisiamu imvi m'madzi ndi mumlengalenga pansi pa mphamvu ya CO2, calcium carbonate, ndi madzi a HPMC okha, zimathandiza kuti imvi ikhale bwino, yake sinachite nawo chilichonse.

9.HPMC yosakhala ionic cellulose ether, ndiye kodi yosakhala 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.

10. Kodi kutentha kwa gel kwa hydroxypropyl methyl cellulose kumakhudzana ndi chiyani?

– Yankho: Kutentha kwa gelHPMCimagwirizana ndi kuchuluka kwa methoxyl, kuchuluka kwa methoxyl ↓ kukakhala kochepa, kutentha kwa gel kumakhala kwakukulu.

11, ufa wa putty ndi HPMC palibe ubale?

Yankho: ufa wa putty ndi phulusa la calcium makamaka ndi khalidwe la calcium limagwirizana 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 pang'ono ndi HPMC, ndiye kuti kusunga madzi a HPMC ndi kochepa, kungayambitsenso ufa.

12, kodi kusiyana kwake ndi chiyani pakati pa hydroxypropyl methyl cellulose ndi madzi ozizira osungunuka komanso otentha osungunuka 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.

13, fungo la hydroxypropyl methyl cellulose (HPMC) ndi lotani?

– Yankho: HPMC yopangidwa ndi njira yosungunulira imapangidwa ndi toluene ndi isopropyl alcohol. Ngati kutsuka sikuli bwino, padzakhala kukoma kotsalira.

14, ntchito zosiyanasiyana, momwe mungasankhire hydroxypropyl methyl cellulose (HPMC) yoyenera?

– yankho: topa ndi kugwiritsa ntchito ufa wa mwana: chofunikira ndi chotsika, kukhuthala 100,000, chabwino, ndikofunikira kuteteza madzi kuti akhale pafupi. Kugwiritsa ntchito m'matope: zofunikira kwambiri, kukhuthala kwakukulu, 150,000 kuti zikhale bwino. Kugwiritsa ntchito guluu: kufunika kwa zinthu zomwe zingagwiritsidwe ntchito nthawi yomweyo, kukhuthala kwakukulu.

15. Kodi dzina lodziwika bwino la hydroxypropyl methyl cellulose ndi chiyani?

– YANKHO: Hydroxypropyl Methyl Cellulose, Yofupikitsidwa ngati HPMC kapena MHPC, kapena Hydroxypropyl Methyl Cellulose; Cellulose hydroxypropyl methyl ether; Hypromellose, Cellulose, 2-hydroxypropyl methyl Cellulose ether.

16. HPMC pakugwiritsa ntchito ufa wa putty, putty powder bubble chifukwa chiyani?

Yankho: HPMC mu ufa wa putty, 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.

17. 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 ya hydroxypropyl methyl cellulose, imayengedwa ndi thonje pambuyo pothandizidwa ndi alkali, ndi propylene oxide ndi chloromethane ngati etherifying agent, 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.

18. Kodi ndi chiyani chomwe chiyenera kuganiziridwa pogwiritsira ntchito ubale pakati pa kukhuthala ndi kutentha kwa HPMC?

Yankho: KUkhuthala kwaHPMCZimasiyana kwambiri 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 popanga putty.

Chifukwa: Kusunga bwino madzi.

Kukhuthala kwakukulu: 150000-200000 kumagwiritsidwa ntchito makamaka pa polystyrene tinthu tating'onoting'ono tomwe timateteza ku zinthu zina monga ufa wa rabara ndi matope oteteza ku zinthu zina monga mikanda ya vitrified.

Chifukwa: kukhuthala kwakukulu, matope sali osavuta kugwetsa, kuyenda kwa madzi kumapachikidwa, kukonza kapangidwe kake.

Koma nthawi zambiri, kukhuthala kwa madzi kukakhala kwakukulu, kumakhala bwino kusunga madzi, motero mafakitale ambiri ouma, poganizira mtengo wake, amagwiritsa ntchito cellulose yapakatikati (75000-100000) kuti alowe m'malo mwa cellulose yapakatikati ndi yotsika (20000-40000) kuti achepetse kuchuluka kwa kuwonjezera.