I-Hydroxypropyl methyl cellulose (HPMC) viscosity ye-Skim coat?
– impendulo: I-skim coat ilungile ngokuqhelekileyo i-HPMC 100000cps, ezinye zinde kunemfuneko kwi-mortar, zifuna amandla okusebenzisa i-150000cps. Ngaphezu koko, i-HPMC yeyona ndima ibalulekileyo yokugcina amanzi, ilandelwa kukuqina. Kwi-skim coat, lo gama nje ukugcina amanzi kulungile, i-viscosity iphantsi (7-80000), kunokwenzeka, ewe, i-viscosity inkulu, ukugcinwa kwamanzi kungcono, xa i-viscosity ingaphezulu kwe-100 lamawaka, i-viscosity yokugcina amanzi ayininzi.
Ziziphi izalathisi eziphambili zobugcisa ze-hydroxypropyl methyl cellulose (HPMC)?
Impendulo: Ubungakanani beHydroxypropyl kunye ne-viscosity, uninzi lwabasebenzisi lukhathalele ezi mpawu zimbini. Ubungakanani beHydroxypropyl buphezulu, ukugcinwa kwamanzi ngokubanzi kungcono. Ubungakanani, ukugcinwa kwamanzi, isihlobo (kodwa kungekhona ngokupheleleyo) nako kungcono, kwaye ubuninzi, i-samente mortar kungcono ukuyisebenzisa.
IHydroxypropyl methyl cellulose (HPMC) zeziphi izinto eziphambili zokwenza imveliso?
Impendulo: hydroxypropyl methyl cellulose (HPMC) izinto eziphambili ezisetyenziswayo: umqhaphu ocoliweyo, i-chloromethane, i-propylene oxide, ezinye izinto ezisetyenziswayo, i-tablet alkali, i-asidi, i-toluene, i-isopropyl alcohol njalo njalo.
I-HPMC kwi-skim coat kwisicelo, indima ephambili, ingaba yikhemikhali?
Impendulo: I-HPMC kwi-Skim coat, ukuqina, amanzi kunye nokwakhiwa kweendima ezintathu. Ukuqina: i-cellulose inokujiya ide imiswe, ukuze isisombululo sihlale silingana phezulu nasezantsi indima yokuxhoma okuchasene nokuhamba kwamanzi. Ukugcinwa kwamanzi: yenza i-Skim coat yome kancinci, i-calcium engwevu encedisayo kwisenzo se-reaction yamanzi. Ukwakhiwa: i-cellulose lubrication, inokwenza i-Skim coat inokwakhiwa okuhle. I-HPMC ayithathi nxaxheba kuyo nayiphi na i-reaction yeekhemikhali, kodwa idlala indima exhasayo kuphela. I-Skim coat kunye namanzi, eludongeni, yi-reaction yeekhemikhali, ngenxa yokuveliswa kwezinto ezintsha, udonga lwe-Skim coat luyehla lusuka eludongeni, lucolwe lube ngumgubo, kwaye emva koko lusetyenziswe, alulunganga, kuba lwenze into entsha (i-calcium carbonate). Izinto eziphambili ze-gray calcium powder zezi: Ca(OH)2, CaO kunye nomxube omncinci weCaCO3, CaO+H2O=Ca(OH)2 – Ca(OH)2+CO2=CaCO3↓+H2O grey calcium emanzini nasemoyeni phantsi kwesenzo seCO2, ukwakheka kwecalcium carbonate, kunye ne-HPMC kuphela ngamanzi, i-gray calcium encedisayo engcono, eyayo ayizange ithathe inxaxheba kuyo nayiphi na impendulo.
I-HPMC yi-non-ionic cellulose ether, ngoko ke yintoni i-non-ionic?
A: Ngokubanzi, ii-non-ions zizinto ezingayiyoni emanzini. Ionization kukwahlukana kwe-electrolyte ibe zii-ion ezitshajiweyo ezikhululekileyo kwi-solvent ethile, njengamanzi okanye utywala. Umzekelo, ityuwa esiyityayo yonke imihla — i-sodium chloride (NaCl) iyanyibilika emanzini kwaye i-ionizes ukuvelisa ii-ion ze-sodium ezihambayo ngokukhululekileyo (Na+) ezine-charge entle kunye nee-ion ze-chloride (Cl) ezine-charge engalunganga. Oko kukuthi, i-HPMC emanzini ayihlukani ibe zii-ion ezitshajiweyo, kodwa ikhona njengee-molecule.
Ingakanani iqondo lobushushu be-gelation ye-hydroxypropyl methyl cellulose enxulumene nayo?
Impendulo: Ubushushu bejeli ye-HPMC bunxulumene nomxholo we-methoxyl. Okukhona umxholo we-methoxyl uphantsi, kokukhona ubushushu bejeli buphezulu.
Umgubo we-skim coat kunye ne-HPMC akukho budlelwane?
Impendulo: Umgubo we-skim coat drop ikakhulu kunye nomgangatho we-ash calcium unobudlelwane obukhulu kakhulu, kwaye i-HPMC ayinabudlelwane obukhulu kakhulu. Umxholo ophantsi we-calcium ye-grey calcium kunye nomlinganiselo ongafanelekanga we-CaO kunye ne-Ca(OH)2 kwi-grey calcium kuya kubangela ukuhla komgubo. Ukuba kukho ubudlelwane ne-HPMC, ukugcinwa kwamanzi okungalunganga kwe-HPMC kuya kubangela ukulahleka komgubo.
Yintoni umahluko phakathi kwe-hydroxypropyl methyl cellulose enyibilikayo emanzini abandayo kunye ne-hydroxypropyl methyl cellulose enyibilikayo eshushu kwinkqubo yemveliso?
– Impendulo: Uhlobo lwesisombululo samanzi abandayo lweHPMC lusetyenziswa emva konyango lomphezulu we-glyoxal, lufakwa emanzini abandayo asasazeka ngokukhawuleza, kodwa alunyibiliki ngokwenene, i-viscosity iyanda, iyanyibilika. Uhlobo olunyibilikayo aluzange luphathwe nge-glyoxal kumphezulu. Ubungakanani be-glyoxal bukhulu, ukusasazeka kuyakhawuleza, kodwa i-viscosity iyacotha, ubuninzi buncinci, ngokuchaseneyo.
Yintoni enuka ivumba le-hydroxypropyl methyl cellulose (HPMC)?
– Impendulo: I-HPMC eveliswa ngendlela yesinyibilikisi yenziwe nge-toluene kunye ne-isopropyl alcohol. Ukuba ukuhlamba akukuhle kakhulu, kuya kubakho incasa eseleyo.
Iindlela ezahlukeneyo zokusetyenziswa, ungayikhetha njani i-hydroxypropyl methyl cellulose (HPMC) efanelekileyo?
– impendulo: dikiwe kukusetyenziswa komgubo womntwana: imfuneko iphantsi, i-viscosity yi-100000, kulungile, kubalulekile ukukhusela amanzi ukuze ube kufutshane. Ukufakwa kwe-mortar: iimfuneko eziphezulu, iimfuneko ze-viscosity ephezulu, i-150000 ukuze ibe ngcono. Ukufakwa kweglue: imfuneko yeemveliso ezikhawulezileyo, i-viscosity ephezulu.
Liliphi elinye igama le-hydroxypropyl methyl cellulose?
– IMPENDULO: I-Hydroxypropyl MethylCellulose, Ifinyeziwe njenge-HPMC okanye i-MHPC, okanye i-Hydroxypropyl Methyl Cellulose; I-Cellulose hydroxypropyl methyl ether; I-Hypromellose, i-Cellulose, i-2-hydroxypropyl methyl I-Cellulose ether.
I-HPMC ekusebenziseni i-Skim coat, yintoni ebangela ukuba i-Skim coat bubble ibe yi-Skim coat?
Impendulo: I-HPMC kwi-skim coat, ukutyeba, amanzi kunye nokwakhiwa kwemisebenzi emithathu. Ayithathi nxaxheba kuyo nayiphi na impendulo. Izizathu zamaqamza: 1, amanzi amaninzi. 2, umzantsi awomile, phezulu komaleko wokukrwela, kulula nokuwadubula.
Udonga lwangaphakathi nolwangaphandle Ifomyula yejazi elithambileyo?
– impendulo: udonga lwangaphakathi Ingubo ethambileyo: i-calcium 800KG i-calcium engwevu 150KG (i-starch ether, uhlaza olucocekileyo, i-peng runtu, i-citric acid, i-polyacrylamide inokongezwa ngokufanelekileyo)
Udonga lwangaphandle olune-skim coat: isamente 350KG i-calcium 500KG isanti ye-quartz 150KG umgubo we-latex 8-12kg i-cellulose ether 3KG i-starch ether 0.5kg i-wood fibre 2KG
Yintoni umahluko phakathi kwe-HPMC kunye ne-MC?
– Impendulo: I-MC yi-methyl cellulose, eyenziwe nge-cellulose ether ngothotho lwee-reactions kunye ne-methane chloride njenge-etherifying agent emva kokuba umqhaphu ocociweyo uphathwe nge-alkali. Ngokubanzi, inqanaba lokutshintshwa yi-1.6~2.0, kwaye ukunyibilika kuyahluka ngokwenqanaba lokutshintshwa. Ixhomekeke kwi-nonion cellulose ether.
(1) Ukugcinwa kwamanzi kwe-methyl cellulose kuxhomekeke kubungakanani bayo bokongeza, ukuxinana, ukucoleka kwamasuntswana kunye nesantya sokunyibilika. Ngokubanzi ukongeza ubungakanani obukhulu, ukucoleka okuncinci, ukucoleka, izinga lokugcina amanzi liphezulu. Phakathi kwazo, ubungakanani be-additive bunempembelelo enkulu ekugcinweni kwamanzi, kwaye ukucoleka akulingani nokugcinwa kwamanzi. Izinga lokunyibilika lixhomekeke kakhulu kwinqanaba lokuguqulwa komphezulu kunye nokucoleka kwamasuntswana e-cellulose. Kwii-ethers ezininzi ze-cellulose ezingentla, izinga lokugcina amanzi le-methyl cellulose kunye ne-hydroxypropyl methyl cellulose liphezulu.
(2) I-Methyl cellulose iyanyibilika emanzini abandayo, okunzima ukuyinyibilikisa emanzini ashushu. Isisombululo sayo samanzi sizinzile kakhulu ngaphakathi kwe-pH=3~12. Ihambelana kakuhle nesitatshi, i-guanidine gum kunye nezinye izinto ezininzi ezibangela ukubola. Ukubola kwenzeka xa ubushushu bufikelela kubushushu bokubola.
(3) Utshintsho lobushushu luya kuchaphazela kakhulu izinga lokugcina amanzi le-methyl cellulose. Ngokubanzi, xa ubushushu buphezulu, kokukhona ukugcinwa kwamanzi kubi. Ukuba ubushushu be-mortar budlula i-40℃, ukugcinwa kwamanzi kwe-methyl cellulose kuya kuba kubi kakhulu, nto leyo echaphazela kakhulu ukwakhiwa kwe-mortar.
(4) I-Methyl cellulose inempembelelo ecacileyo ekwakheni nasekunamatheleni kwe-mortar. Igama elithi "Adhesion" apha libhekisa ekunamatheleni okuvayo ngumsebenzi phakathi kwesixhobo kunye ne-substrate yodonga, oko kukuthi ukumelana nokucheba kwe-mortar. Ukuncamathelisa kukhulu, ukumelana nokucheba kwe-mortar kukhulu, amandla afunekayo kubasebenzi kwinkqubo yokusetyenziswa nawo makhulu, kwaye ukwakhiwa kwe-mortar kuphantsi. Kwiimveliso ze-cellulose ether, ukunamathela kwe-methyl cellulose kukwinqanaba eliphakathi.
I-HPMC hydroxypropyl methyl cellulose, ihlanjululwa ngekotoni emva konyango lwe-alkali, nge-propylene oxide kunye ne-chloromethane njenge-ether e-etherifying, ngokusebenzisa uthotho lweempendulo kwaye yenziwe nge-non-ionic cellulose mixed ether. Umgangatho wokutshintshwa ngokubanzi yi-1.2 ~ 2.0. Iimpawu zayo ziyahluka ngokwesilinganiso somxholo we-methoxy kunye ne-hydroxypropyl.
(1) I-Hydroxypropyl methyl cellulose inyibilika lula emanzini abandayo, nto leyo enzima ukuyinyibilikisa emanzini ashushu. Nangona kunjalo, ubushushu bayo be-gelation emanzini ashushu buphezulu ngokucacileyo kunobo be-methyl cellulose. Ukunyibilika kwe-methyl cellulose emanzini abandayo nako kuphuculwe kakhulu.
(2) Ubunzima be-hydroxypropyl methyl cellulose bunxulumene nobunzima bayo beemolekyuli, kwaye okukhona ubunzima be-molekyuli buphezulu, kokukhona ubuninzi be-viscosity. Ubushushu bukwachaphazela nobunzima be-viscosity. Ubunzima be-viscosity buyancipha njengoko ubushushu busanda. Kodwa ubushushu bayo obuphezulu buphantsi kune-methyl cellulose. Isisombululo sizinzile xa sigcinwe kubushushu begumbi.
(3) I-Hydroxypropyl methyl cellulose izinzile kwi-asidi nakwisiseko, kwaye isisombululo sayo samanzi sizinzile kakhulu kuluhlu lwe-pH=2~12. I-Caustic soda kunye namanzi ekalika azinampembelelo ingako kwiipropati zayo, kodwa i-alkali inokukhawulezisa izinga layo lokunyibilika kwaye iphucule i-viscosity. I-Hydroxypropyl methyl cellulose izinzile kwi-viscosity eqhelekileyo, kodwa xa uxinzelelo lwe-viscosity ye-hydroxypropyl methyl cellulose ludla ngokwanda.
(4) Ukugcinwa kwamanzi kwe-hydroxypropyl methyl cellulose kuxhomekeke kwidosi kunye ne-viscosity yayo, kwaye izinga lokugcinwa kwamanzi kwe-hydroxypropyl methyl cellulose liphezulu kunele-methyl cellulose kwidosi efanayo.
(5) I-Hydroxypropyl methyl cellulose ingaxutywa nee-polymer compounds ezinyibilikayo emanzini ukuze zibe yisisombululo esifanayo nesinobukrakra. Ezifana ne-polyvinyl alcohol, i-starch ether, i-vegetable glue njalo njalo.
(6) Ukunamathela kwe-hydroxypropyl methyl cellulose kulwakhiwo lwe-mortar kuphezulu kunoko kwe-methyl cellulose.
(7) I-Hydroxypropyl methyl cellulose inokumelana okungcono kwee-enzyme kune-methyl cellulose, kwaye amathuba okubola kwe-enzyme yesisombululo sayo aphantsi kune-methyl cellulose.
Yintoni ekufuneka iqwalaselwe xa isetyenziswa ngokoqobo malunga nolwalamano phakathi kwe-viscosity kunye nobushushu be-HPMC?
Impendulo: I-viscosity ye-HPMC ihambelana ngokuphambeneyo nobushushu, oko kukuthi, i-viscosity iyanda ngokuncipha kobushushu. Xa sithetha nge-viscosity yemveliso, sithetha nge-viscosity ye-2% yemveliso emanzini kwi-20 degrees Celsius.
Kwindlela yokusebenza, kwiindawo ezinomahluko omkhulu kubushushu phakathi kwehlobo nobusika, kufuneka kuqatshelwe ukuba kucetyiswa ukusebenzisa i-viscosity ephantsi ebusika, nto leyo elungele ukwakhiwa. Ngaphandle koko, xa ubushushu buphantsi, i-viscosity ye-cellulose iya kwanda, kwaye xa ikrwelwa, imvakalelo iya kuba nzima.
I-viscosity ephakathi: 75000-100000 isetyenziselwa ikakhulu i-putty
Isizathu: Ukugcinwa kakuhle kwamanzi
I-viscosity ephezulu: HPMC 150000-200000 isetyenziswa kakhulu kwi-polystyrene particle insulation mortar glue powder material kunye ne-vitrified beads insulation mortar.
Isizathu: i-viscosity ephezulu, i-mortar ayilula ukuyilahla, i-flow hanging, iphucula ulwakhiwo.
Kodwa ngokubanzi, okukhona i-viscosity iphezulu, kokukhona ukugcinwa kwamanzi kuphucuka, ngoko ke iifektri ezininzi ze-dry mortar, xa kujongwa iindleko, zisebenzisa i-medium viscosity HPMC cellulose (75000-100000) ukutshintsha i-medium and low viscosity HPMC cellulose (20000-40000) ukunciphisa ubungakanani bokongeza.
Ixesha lokuposa: Jan-10-2022