I-Hydroxypropyl methyl cellulose (HPMC) viscosity ye-Skim coat ?
- impendulo: Ijazi le-Skim lilungile ngokujwayelekile i-HPMC 100000cps, ubude obuthile bemfuneko odakeni, lifuna ikhono lokusebenzisa i-150000cps. Ngaphezu kwalokho, i-HPMC iyindima ebaluleke kakhulu yokugcina amanzi, okulandelwa ukujiya. Ku-Skim coat, inqobo nje uma ukugcinwa kwamanzi kuhle, i-viscosity iphansi (7-80000), kungenzeka futhi, yebo, i-viscosity inkulu, ukugcinwa kwamanzi okuhlobene kungcono, lapho i-viscosity ingaphezu kuka-100. izinkulungwane, i-viscosity yokugcinwa kwamanzi ayiningi.
Yiziphi izinkomba zobuchwepheshe eziyinhloko ze-hydroxypropyl methyl cellulose (HPMC)?
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.
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.
HPMC in Skim coat in isicelo, indima eyinhloko, noma ngabe amakhemikhali?
Impendulo: I-HPMC ku-Skim coat, ukuqina, amanzi nokwakhiwa kwezindima ezintathu. Ukuqina: i-cellulose ingagqitshwa ukuze imiswe, ukuze ikhambi lihlale lifana phezulu naphansi indima yokulengiswa kokunqanda ukugeleza. Ukugcinwa kwamanzi: yenza ijazi le-Skim lome kancane, i-calcium e-grey eyisiza esenzweni sokusabela kwamanzi. Ukwakhiwa: i-cellulose lubrication, ingenza i-Skim coat inokwakhiwa okuhle. I-HPMC ayibambi iqhaza kunoma yikuphi ukusabela kwamakhemikhali, kodwa idlala indima yokusekela kuphela. Ijazi le-Skim namanzi, odongeni, ukusabela kwamakhemikhali, ngenxa yokukhiqizwa kwezinto ezintsha, udonga lwejazi le-Skim phansi odongeni, lugaywe lube yimpushana, bese lusebenzisa, hhayi okuhle, ngoba selwenze into entsha. (i-calcium carbonate). Izingxenye eziyinhloko zempushana ye-calcium empunga yilezi: I-Ca(OH)2, i-CaO kanye nenani elincane lengxube ye-CaCO3, i-CaO+H2O=Ca(OH)2 - Ca(OH)2+CO2=CaCO3↓+H2O grey calcium emanzini. kanye nomoya ngaphansi kwesenzo se-CO2, ukwakheka kwe-calcium carbonate, kanye ne-HPMC kuphela amanzi, i-axiliary gray calcium yokusabela kangcono, eyakhe ayizange ihlanganyele kunoma yikuphi ukusabela.
I-HPMC i-non-ionic cellulose ether, ngakho-ke yini engeyona i-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 bese i-ionize ikhiqize ama-ion sodium (Na+) ahambayo mahhala kanye nama-chloride ions (Cl) aneshajethi engalungile. Okusho ukuthi, i-HPMC emanzini ayihlukanisi kuma-ion ashajiwe, kodwa ikhona njengama-molecule.
Liyini izinga lokushisa le-gelation le-hydroxypropyl methyl cellulose elihlobene?
Impendulo: Izinga lokushisa lejeli le-HPMC lihlobene nokuqukethwe kwe-methoxyl. Lapho okuqukethwe kwe-methoxyl kuphansi, izinga lokushisa lejeli liphezulu.
I-Skim coat powder kanye ne-HPMC abukho ubuhlobo?
Impendulo: I-Skim coat drop 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 ne-HPMC, khona-ke ukugcinwa kwamanzi okumpofu kwe-HPMC kuzophinde kubangele ukulahlekelwa kwempushana.
Uyini umehluko phakathi kwe-soluble yamanzi abandayo ne-hot soluble hydroxypropyl methyl cellulose ohlelweni lokukhiqiza?
– 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.
Kuyini nge-hydroxypropyl methyl cellulose (HPMC) enukayo?
– Impendulo: I-HPMC ekhiqizwa ngendlela ye-solvent yenziwe nge-toluene ne-isopropyl alcohol. Uma ukugeza kungalungile kakhulu, kuzoba khona ukunambitheka okusele.
Ukusetshenziswa okuhlukile, ungayikhetha kanjani i-hydroxypropyl methyl cellulose (HPMC) efanele?
- impendulo: unesithukuthezi ngokusetshenziswa kwe-powder yengane: imfuneko ingaphansi, i-viscosity 100000, ok, kubalulekile ukuvikela amanzi ukuze abe seduze. Isicelo sodaka: izidingo eziphakeme, izidingo ze-viscosity eziphezulu, i-150000 ukuze ibe ngcono. Glue isicelo: isidingo imikhiqizo esheshayo, viscosity high.
Iliphi elinye igama le-hydroxypropyl methyl cellulose?
– IMPENDULO: I-Hydroxypropyl MethylCellulose, 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-HPMC ekusetshenzisweni kwejazi le-Skim, yisiphi isizathu se-Skim coat bubble?
Impendulo: I-HPMC ku-Skim coat, ukuqina, amanzi nokwakhiwa kwezindima ezintathu. Ukungahlanganyeli kunoma yikuphi ukusabela. Izimbangela zamabhamuza: 1, amanzi amaningi. 2, phansi awomile, phezulu kwesendlalelo sokukhuhla, futhi kulula ukuqhunyiswa.
Ifomula yejazi le-Skim elingaphakathi nangaphandle?
– impendulo: ingaphakathi odongeni Skim coat : calcium 800KG grey calcium 150KG (isitashi ether, okuluhlaza okumsulwa, peng runtu, citric acid, polyacrylamide kungenziwa wanezela ngokufanele)
Udonga lwangaphandle Ijazi le-Skim : usimende 350KG calcium 500KG isihlabathi sequartz 150KG latex powder 8-12kg cellulose ether 3KG isitashi ether 0.5kg i-wood fiber 2KG
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 hydroxypropyl methyl cellulose, icwengwa ukotini ngemva kokwelashwa kwe-alkali, nge-propylene oxide ne-chloromethane njenge-ejenti e-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.
Yini okufanele inakwe ekusebenziseni okungokoqobo mayelana nobudlelwano 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: I-HPMC 150000-200000 isetshenziselwa ikakhulukazi i-polystyrene particle insulation mortar glue powder material kanye ne-vitrified bead insulation mortar.
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-viscosity ephakathi kwe-HPMC cellulose (75000-100000) esikhundleni se-viscosity ephakathi nendawo ephansi ye-HPMC cellulose (20000-40000) ukunciphisa inani lokwengeza.
Isikhathi sokuthumela: Jan-10-2022