Isixazululo se-HPMC

1, ikuphi ukusetshenziswa okuyinhloko kwe-hydroxypropyl methyl cellulose (HPMC)?

Impendulo : I-HPMC isetshenziswa kakhulu ezintweni zokwakha, okokuhlanganisa, ama-synthetic resin, izitsha zobumba, imithi, ukudla, izindwangu, ezolimo, izimonyo, ugwayi nezinye izimboni.I-HPMC ingahlukaniswa: Ibanga lokwakha, ibanga lokudla kanye nebanga lezokwelapha ngokusho kokusetshenziswa.Njengamanje okuzenzelayo ikakhulukazi izinga lokwakha, ezingeni lokwakha, inani le-putty powder likhulu kakhulu, cishe u-90% usetshenziselwa ukwenza i-putty powder, enye isetshenziselwa ukwenza udaka lukasimende neglue.

2, i-hydroxypropyl methyl cellulose (HPMC) ihlukaniswe yaba izinhlobo eziningana, uyini umehluko phakathi kokusetshenziswa kwayo?

Impendulo : I-HPMC ingahlukaniswa ibe esheshayo futhi encibilikayo ekushiseni, imikhiqizo esheshayo, emanzini abandayo ahlakazeke ngokushesha, anyamalale emanzini, ngalesi sikhathi uketshezi alunayo i-viscosity, ngoba i-HPMC isanda kuhlakazeka emanzini, akukho ukuchithwa kwangempela.Cishe imizuzu emi-2, i-viscosity yoketshezi iyanda kancane kancane, yakha i-viscous colloid esobala.Ukushisa imikhiqizo encibilikayo, emanzini abandayo agglomeration, ingaba emanzini ashisayo, ahlakazeke ngokushesha, anyamalale emanzini ashisayo, kuze kube yilapho izinga lokushisa lehla liye ezingeni lokushisa elithile, i-viscosity ibonakala kancane, kuze kube yilapho kwakheka i-viscous colloid ebonakalayo.Uhlobo oluncibilikayo lokushisa lungasetshenziswa kuphela ku-putty powder nodaka, ku-glue ewuketshezi kanye ne-coating, kungavela into ye-agglomeration, ayikwazi ukusetshenziswa.Imodeli encibilikayo esheshayo, ububanzi bohlelo lokusebenza bubanzi, ngokudinwa yimpushana yengane nodaka, futhi ku-glue ewuketshezi kanye ne-coating, konke kungasetshenziswa, ungabi nayo i-taboo.

3, Izindlela zokuhlakaza i-hydroxypropyl methyl cellulose (HPMC) zinalezo?

- impendulo: indlela yokuchithwa kwamanzi ashisayo: ngenxa yokuthi i-HPMC ayincibiliki emanzini ashisayo, ngakho-ke i-HPMC yakuqala ingahlakazwa ngokulinganayo emanzini ashisayo, bese incibilika ngokushesha lapho ipholisa, izindlela ezimbili ezijwayelekile zichazwa kanje:

1) Gcwalisa isitsha ngamanzi ashisayo amaningi ngendlela owadinga ngayo bese usishisa sibe ngu-70℃.I-Hydroxypropyl methyl cellulose yengezwa kancane kancane ngaphansi kokunyakaziswa kancane, futhi i-HPMC intanta phezu kwamanzi, bese kancane kancane yakha udaka, olupholiswa ngaphansi kokunyakaziswa.

2) Faka i-1/3 noma 2/3 yenani elidingekayo lamanzi esitsheni bese usishisa ku-70℃.Hlakaza i-HPMC ngokwendlela 1) ukulungisa udaka lwamanzi ashisayo;Bese wengeza amanzi abandayo asele ku-slurry yamanzi ashisayo bese upholisa ingxube ngemva kokugqugquzela.

Indlela yokuxuba impushana: I-HPMC powder kanye nenani elikhulu lezinye izithako ze-powdery material, ehlanganiswe ngokugcwele ne-blender, bese wengeza amanzi ukuze ancibilike, ngalesi sikhathi i-HPMC ingancibilika, hhayi i-agglomerate, ngoba ikhona ngalinye elincane, kuphela i-HPMC powder encane, amanzi. izoncibilika ngokushesha.- Abakhiqizi be-putty powder kanye nodaka basebenzisa le ndlela.[I-Hydroxypropyl methyl cellulose (HPMC) esetshenziswa njenge-ejenti yokuqina kanye ne-ejenti egcina amanzi odakeni lwe-putty powder.

4, indlela yokunquma ikhwalithi ye-hydroxypropyl methyl cellulose (HPMC) elula futhi enembile?

Impendulo : (1) ubumhlophe: nakuba ubumhlophe bungakwazi ukunquma ukuthi i-HPMC yinhle yini, futhi uma yengezwa ku-whitener yenqubo yokukhiqiza, izothinta ikhwalithi yayo.Nokho, imikhiqizo eminingi emihle inobumhlophe obuhle.(2) ubucwebe :Ukulunga kwe-HPMC kuvamise ukuba yi-80 mesh kanye ne-100 mesh, i-120 inhloso encane, i-Hebei HPMC ikakhulukazi i-80 mesh, ukucoleka kokucoleka, ukukhuluma ngokuvamile, kungcono.3Ukudluliswa kwe-reactor eqondile ngokuvamile kuhle, futhi lokho kwereactor evundlile kubi kakhulu, kodwa akusho ukuthi ikhwalithi yokukhiqizwa kwereactor eqondile ingcono kunaleyo yereactor evundlile.Kunezici eziningi zokunquma ikhwalithi yomkhiqizo.(4) Isilinganiso: uma sikhulu isilinganiso, esindayo siba ngcono.Okukhulu, ngoba okuqukethwe kwesisekelo se-hydroxyl propyl kuphezulu ngokuvamile, okuqukethwe kwesisekelo se-hydroxyl propyl kuphezulu, vikela amanzi ukuze afune okungcono.

5, i-hydroxypropyl methyl cellulose (HPMC) viscosity ifaneleka kakhulu?

- impendulo: ukuba nesithukuthezi nge-powder yengane kulungile imvamisa izinkulungwane eziyi-100, ezinye zinde zemfuneko odakeni, zifuna ikhono lokusebenzisa izinkulungwane eziyi-150.Ngaphezu kwalokho, i-HPMC iyindima ebaluleke kakhulu yokugcina amanzi, okulandelwa ukujiya.Ku-putty powder, inqobo nje uma ukugcinwa kwamanzi kuhle, i-viscosity iphansi (izinkulungwane ezingu-7-80), kungenzeka futhi, yebo, i-viscosity inkulu, ukugcinwa kwamanzi okuhlobene kungcono, lapho i-viscosity ingaphezu Izinkulungwane eziyi-100, i-viscosity yokugcinwa kwamanzi ayiningi.

6, i-hydroxypropyl methyl cellulose (HPMC) yiziphi izinkomba zobuchwepheshe eziyinhloko?.

Impendulo: Okuqukethwe kwe-Hydroxypropyl kanye ne-viscosity, abasebenzisi abaningi banendaba nalezi zinkomba ezimbili.Okuqukethwe kwe-Hydroxypropyl kuphezulu, ukugcinwa kwamanzi ngokuvamile kungcono.I-viscosity, ukugcinwa kwamanzi, isihlobo (kodwa hhayi ngokuphelele) kungcono futhi, futhi i-viscosity, udaka lukasimende lungcono ukusebenzisa ezinye.

7, i-hydroxypropyl methyl cellulose (HPMC) yiziphi izinto zokusetshenziswa eziyinhloko?

Impendulo: i-hydroxypropyl methyl cellulose (HPMC) izinto zokusetshenziswa eziyinhloko: ukotini ocolile, i-chloromethane, i-propylene oxide, ezinye izinto zokusetshenziswa, i-alkali yethebhulethi, i-asidi, i-toluene, i-isopropyl alcohol nokunye.

I-8, i-HPMC ekusetshenzisweni kwe-putty powder, indima eyinhloko, noma ngabe ukuvela kwamakhemikhali?

Impendulo: I-HPMC ku-putty powder, ukuqina, amanzi nokwakhiwa kwezindima ezintathu.Ukuqina: i-cellulose ingagqitshwa ukuze imiswe, ukuze ikhambi lihlale lifana phezulu naphansi indima yokulengiswa kokunqanda ukugeleza.Ukugcinwa kwamanzi: yenza i-putty powder yome kancane, isiza se-calcium empunga esenzweni sokusabela kwamanzi.Ukwakhiwa: i-cellulose lubrication, ingenza i-putty powder inokwakhiwa okuhle.I-HPMC ayibambi iqhaza kunoma yikuphi ukusabela kwamakhemikhali, kodwa idlala indima yokusekela kuphela.I-putty powder namanzi, odongeni, ukusabela kwamakhemikhali, ngenxa yesizukulwane sezinto ezintsha, udonga lwe-putty powder phansi odongeni, lugaywe lube yimpushana, bese lusebenzisa, hhayi okuhle, ngoba kwakheka into entsha. (i-calcium carbonate).Ukwakheka okuyinhloko kwempushana ye-calcium empunga yingxube ye-Ca(OH)2,CaO kanye nenani elincane le-CaCO3,CaO+H2O=Ca(OH)2 — Ca(OH)2+CO2=CaCO3↓+H2O Gray calcium amanzi nomoya ngaphansi kwesenzo se-CO2, i-calcium carbonate, kanye ne-HPMC kuphela amanzi, kusiza ukusabela okungcono kwe-calcium empunga, eyakhe ayizange ibambe iqhaza kunoma yikuphi ukusabela.

9.HPMC non-ionic cellulose ether, ngakho yini i-non-ionic?

IMP: Ngokuvamile, okungezona ama-ion yizinto ezingafaki ionisi emanzini.I-ionization iwukuhlukaniswa kwe-electrolyte ibe ama-ion ashajwa ahamba mahhala kusincibilikisi esithile, njengamanzi noma utshwala.Isibonelo, usawoti esiwudla nsuku zonke - i-sodium chloride (NaCl) incibilika emanzini futhi i-ionize ikhiqize ama-ion sodium (Na+) ahambayo mahhala kanye nama-chloride ion (Cl) aneshajethi engalungile.Okusho ukuthi, i-HPMC emanzini ayihlukanisi kuma-ion ashajiwe, kodwa ikhona njengama-molecule.

10. Yini ehlobene nezinga lokushisa lejeli le-hydroxypropyl methyl cellulose?

– Impendulo: Izinga lokushisa lejeli le-HPMC lihlobene nokuqukethwe kwe-methoxyl, ukwehla kokuqukethwe kwe-methoxyl ↓, kuyanda izinga lokushisa lejeli.

I-11, i-putty powder powder kanye ne-HPMC abukho ubuhlobo?

Impendulo: i-putty powder drop powder ikakhulukazi kanye nekhwalithi ye-ash calcium inobudlelwane obukhulu kakhulu, futhi i-HPMC ayinabo ubuhlobo obukhulu kakhulu.I-calcium ephansi ye-calcium empunga kanye nengxenye engafanele ye-CaO ne-Ca(OH)2 ku-calcium empunga kuzobangela ukuwa kwempushana.Uma kukhona ubuhlobo obuncane ne-HPMC, khona-ke ukugcinwa kwamanzi kwe-HPMC kubi, kuzophinde kubangele impushana.

12, i-hydroxypropyl methyl cellulose amanzi abandayo ancibilikayo futhi ancibilika ashisayo ohlelweni lokukhiqiza ukuthi uyini umehluko?

– Impendulo :Amanzi abandayo e-HPMC uhlobo lwesixazululo esisheshayo singemva kokwelashwa kwe-glyoxal ebusweni, afakwe emanzini abandayo ahlakazeke ngokushesha, kodwa angancibiliki ngempela, i-viscosity up, iyancibilika.Uhlobo lwe-thermosoluble aluzange lwelashwe phezulu nge-glyoxal.Inani le-glyoxal likhulu, ukuhlakazeka kuyashesha, kodwa i-viscosity ihamba kancane, inani lincane, ngokuphambene nalokho.

13, i-hydroxypropyl methyl cellulose (HPMC) iphunga linjani?

– Impendulo: I-HPMC ekhiqizwa ngendlela ye-solvent yenziwe nge-toluene ne-isopropyl alcohol.Uma ukugeza kungalungile kakhulu, kuzoba khona ukunambitheka okusele.

14, ukusetshenziswa okuhlukile, ungayikhetha kanjani i-hydroxypropyl methyl cellulose (HPMC) efanele?

– impendulo: ube nesithukuthezi ngokusetshenziswa kwe-powder yengane: imfuneko ingaphansi, i-viscosity 100 ayizinkulungwane, ok, kubalulekile ukuvikela amanzi ukuze abe seduze.Isicelo sodaka: izidingo eziphakeme, izidingo ze-viscosity eziphezulu, izinkulungwane eziyi-150 ukuze zibe ngcono.Glue isicelo: isidingo imikhiqizo esheshayo, viscosity high.

15.Siyini isibizo se-hydroxypropyl methyl cellulose?

– IMPENDULO: I-Hydroxypropyl Methyl Cellulose, Efushanisiwe njenge-HPMC noma i-MHPC, noma i-Hydroxypropyl Methyl Cellulose;i-cellulose hydroxypropyl methyl ether;I-Hypromellose, i-Cellulose, i-2-hydroxypropyl methyl Cellulose ether.

I-16.HPMC ekusetshenzisweni kwe-putty powder, i-putty powder bubble yisiphi isizathu?

Impendulo: I-HPMC ku-putty powder, ukuqina, amanzi nokwakhiwa kwezindima ezintathu.Ukungahlanganyeli kunoma yikuphi ukusabela.Izimbangela zamabhamuza: 1, amanzi amaningi.2, phansi awomile, phezulu kwesendlalelo sokukhuhla, futhi kulula ukuqhunyiswa.

17. Uyini umehluko phakathi kwe-HPMC ne-MC?

– Impendulo :MC i-methyl cellulose, eyenziwe nge-cellulose ether ngochungechunge lokusabela nge-methane chloride njenge-etherifying agent ngemva kokuba ukotini ocolisisiwe ulashwe nge-alkali.Ngokuvamile, izinga lokushintsha lingu-1.6~2.0, futhi ukuncibilika kuyahlukahluka ngezinga lokushintsha.Ingeka-nonionic cellulose ether.

(1) Ukugcinwa kwamanzi kwe-methyl cellulose kuncike enanini layo elingeziwe, i-viscosity, ukucoleka kwezinhlayiyana nezinga lokuqedwa.Ngokuvamile engeza inani elikhulu, inhlawulo encane, i-viscosity, izinga lokugcinwa kwamanzi liphezulu.Phakathi kwazo, inani le-additive linethonya elikhulu ekugcineni kwamanzi, futhi i-viscosity ayilingani nokugcinwa kwamanzi.Izinga lokuncibilika lincike kakhulu kwidigri yokuguqulwa kwendawo kanye nokucoleka kwezinhlayiyana zezinhlayiya ze-cellulose.Kula ma-ether amaningi e-cellulose angenhla, izinga lokugcinwa kwamanzi kwe-methyl cellulose ne-hydroxypropyl methyl cellulose liphezulu.

(2) I-methyl cellulose iyancibilika emanzini abandayo, okunzima ukuyincibilika emanzini ashisayo.Isixazululo saso esinamanzi sizinzile kakhulu ngaphakathi kwe-pH=3~12.Inokuhambisana okuhle nesitashi, i-guanidine gum kanye nama-surfactants amaningi.I-Gelation kwenzeka lapho izinga lokushisa lifinyelela izinga lokushisa le-gelation.

(3) Ukushintsha kwezinga lokushisa kuzothinta kakhulu izinga lokugcinwa kwamanzi e-methyl cellulose.Ngokuvamile, lapho izinga lokushisa liphezulu, kuba kubi nakakhulu ukugcinwa kwamanzi.Uma izinga lokushisa lodaka lidlula ama-40℃, ukugcinwa kwamanzi kwe-methyl cellulose kuzoba kubi kakhulu, okuthinta kakhulu ukwakhiwa kodaka.

(4) I-Methyl cellulose inethonya elisobala ekwakhiweni nasekubambeleleni kodaka."Ukunamathela" lapha kubhekisela ekunamatheleni okuzwiwa yisisebenzi phakathi kwethuluzi ne-substrate yodonga, okungukuthi ukumelana kwe-shear kodaka.Ukunamathela kukhulu, ukumelana kwe-shear kodaka kukhulu, amandla adingwa abasebenzi ngesikhathi sokusebenzisa nawo makhulu, futhi ukwakhiwa kodaka kumpofu.Emikhiqizweni ye-cellulose ether, ukunamathela kwe-methyl cellulose kusezingeni elilinganiselwe.

I-HPMC ye-hydroxypropyl methyl cellulose, icwengwa ukotini ngemva kokwelashwa kwe-alkali, nge-propylene oxide ne-chloromethane njenge-ejenti efaka i-etherifying, ngochungechunge lokusabela futhi yenziwe nge-non-ionic cellulose exutshwe i-ether.Izinga lokushintsha ngokuvamile liyi-1.2 ~ 2.0.Izakhiwo zayo ziyahlukahluka ngengxenye yokuqukethwe kwe-methoxy ne-hydroxypropyl.

(1) IHydroxypropyl methyl cellulose inyibilika kalula emanzini abandayo, okunzima ukuyincibilika emanzini ashisayo.Kodwa-ke, izinga lokushisa layo le-gelation emanzini ashisayo ngokusobala liphakeme kunalelo le-methyl cellulose.Ukuncibilika kwe-methyl cellulose emanzini abandayo nakho kwathuthukiswa kakhulu.

(2) I-viscosity ye-hydroxypropyl methyl cellulose ihlobene nesisindo sayo samangqamuzana, futhi ukuphakama kwesisindo samangqamuzana, i-viscosity iphakama.Izinga lokushisa liphinde lithinte i-viscosity.I-viscosity iyancipha njengoba izinga lokushisa likhuphuka.Kodwa umphumela wayo wokushisa we-viscosity ophezulu uphansi kunalowo we-methyl cellulose.Isixazululo sizinzile uma sigcinwe ekamelweni lokushisa.

(3) I-Hydroxypropyl methyl cellulose izinzile ku-asidi nesisekelo, futhi isisombululo sayo esinamanzi sizinzile kakhulu ebangeni le-pH=2~12.I-Caustic soda namanzi e-lime anethonya elincane ezindaweni zawo, kodwa i-alkali ingasheshisa izinga lokuqedwa futhi ithuthukise i-viscosity.IHydroxypropyl methyl cellulose izinzile kusawoti ojwayelekile, kodwa lapho ukuhlangana kwesixazululo sikasawoti kuphezulu, i-viscosity yesisombululo se-hydroxypropyl methyl cellulose ivame ukwanda.

(4) Ukugcinwa kwamanzi kwe-hydroxypropyl methyl cellulose kuncike esikalini nasekuboneni kwayo, futhi izinga lokugcinwa kwamanzi e-hydroxypropyl methyl cellulose lingaphezulu kwele-methyl cellulose ngethamo elifanayo.

(5) I-Hydroxypropyl methyl cellulose ingaxutshwa nezinhlanganisela ze-polymer ezincibilika emanzini ukuze zibe isixazululo esifanayo, se-viscosity ephakeme.Okufana ne-polyvinyl alcohol, isitashi ether, iglue yemifino nokunye.

(6) Ukunamathela kwe-hydroxypropyl methyl cellulose ekwakhiweni kodaka kungaphezulu kwalokho kwe-methyl cellulose.

(7) IHydroxypropyl methyl cellulose inokumelana ne-enzyme okungcono kune-methyl cellulose, futhi amathuba ayo okuwohloka kwe-enzyme yesisombululo aphansi kunalawo e-methyl cellulose.

18. Yini okufanele inakwe ekusetshenzisweni okungokoqobo kobudlelwane phakathi kwe-viscosity nezinga lokushisa le-HPMC?

Impendulo: I-viscosity ye-HPMC ihambisana ngokuphambene nezinga lokushisa, okusho ukuthi, i-viscosity iyanda ngokuncipha kwezinga lokushisa.Uma sikhuluma nge-viscosity yomkhiqizo, sikhuluma nge-viscosity ka-2% womkhiqizo emanzini ku-20 degrees Celsius.

Ekusetshenzisweni okusebenzayo, ezindaweni ezinomehluko omkhulu wokushisa phakathi kwehlobo nobusika, kufanele kuqashelwe ukuthi kunconywa ukusebenzisa i-viscosity ephansi kakhulu ebusika, okusebenza kangcono ekwakhiweni.Uma kungenjalo, lapho izinga lokushisa liphansi, i-viscosity ye-cellulose izokhula, futhi lapho ukhuhla, ukuzwa kuyoba nzima.

I-viscosity emaphakathi :75000-100000 ikakhulukazi esetshenziselwa i-putty.

Isizathu: Ukugcinwa kahle kwamanzi.

I-viscosity ephezulu :150000-200000 isetshenziselwa ikakhulukazi i-polystyrene particle insulation mortar rubber powder kanye nodaka lobuhlalu obuqinisekisiwe.

Isizathu: i-viscosity ephezulu, udaka akulula ukulahla, ukugeleza ukulenga, ukuthuthukisa ukwakhiwa.

Kodwa ngokuvamile, ukuphakama kwe-viscosity, ukugcinwa kwamanzi kangcono, izimboni eziningi zodaka ezomile, uma ucabangela izindleko, zisebenzisa i-cellulose ye-viscosity ephakathi (75000-100000) esikhundleni se-cellulose ye-viscosity ephakathi nendawo (20000-40000) ukunciphisa inani. yokwengeza.