IHydroxypropyl Methylcellulose HPMC, ekwabizwa ngokuba yiCellulose ether, yipolima yokwenziwa, enyibilikayo emanzini ephuma kwiselulosi. Yenziwa ngokuguqula i-cellulose yendalo, eyona nxalenye yesakhiwo sezityalo, ngoluhlu lweenkqubo zemichiza.
I-Industrial grade hydroxypropyl methylcellulose yahlulwa yi-viscosity. Ngokuqhelekileyo kusetyenziswa la mabakala alandelayo (ngokwemiqathango ye-viscosity).
I-viscosity ephantsi: i-400 isetyenziselwa udaka oluzimeleyo, kodwa luthunyelwa ngokubanzi. Isizathu: i-viscosity ephantsi, nangona ukugcinwa kwamanzi kubi, kodwa ukulinganisa kulungile, ubuninzi bomdaka buphezulu.
I-viscosity ephakathi kunye nephezulu: i-20000-70000 isetyenziselwa i-adhesive tile, i-agent e-caulking, i-crack-resistant mortar, i-thermal insulation bonding mortar, njl.
Loluphi usetyenziso olungundoqo lwe-hydroxypropyl methylcellulose (HPMC)?
HPMCisetyenziswa kakhulu kwizinto zokwakha, iingubo, iintlaka zokwenziwa, iiseramikhi, amayeza, ukutya, amalaphu, ezolimo, izithambiso, icuba kunye namanye amashishini. I-HPMC inokohlulwa ibe: isakhiwo, ukutya kunye namayeza. Okwangoku, uninzi lwezakhiwo eziveliswa ekhaya zikumgangatho wokwakha. Kwibakala lokwakha, inani le-putty powder likhulu kakhulu, malunga ne-90% lisetyenziselwa ukwenza i-putty powder, kwaye intsalela isetyenziselwa udaka lwesamente kunye neglue.
Kukho iindidi ezininzi ze-hydroxypropyl methylcellulose (HPMC). Yintoni umahluko ekusebenziseni kwabo?
HPMCinokwahlulwa ibe yimveliso echithwe ngoko nangoko kunye neshushu-echithwe, enyibilikayo ngokukhawuleza. Xa isasazeka ngokukhawuleza emanzini abandayo, iyanyamalala emanzini. Ngeli xesha, ulwelo akukho viscosity kuba HPMC isasazwe kuphela emanzini kwaye akukho unyibiliko lokwenene. Malunga nemizuzu emi-2, i-viscosity yolwelo ngokuthe ngcembe yaba nkulu, yenze i-colloid ebonakalayo ebonakalayo. Imveliso yohlobo lwe-hot-melt, kwimeko yamanzi abandayo, inokusasazwa ngokukhawuleza emanzini ashushu kwaye iphele emanzini ashushu. Xa ubushushu buhla kwiqondo elithile lobushushu, i-viscosity ibonakala ngokuthe ngcembe de i-colloid ebonakalayo ebonakalayo yenziwe. Uhlobo olushushu oluchithwe lunokusetyenziswa kuphela kwi-putty powder kunye nodaka. Kwiglue yolwelo kunye nepeyinti, kuya kubakho i-phenomenon ye-clumping, engenakusetyenziswa. Ifumaneka kuluhlu olubanzi lwezicelo, kwi-putty powder kunye nodaka, kunye nakwii-glues zolwelo kunye neengubo. Akukho contraindications.
Zeziphi iindlela zokuchithwa kwe-hydroxypropyl methylcellulose (HPMC)?
Indlela yokuchithwa kwamanzi ashushu: Ekubeni i-HPMC inganyibilikiswa emanzini ashushu, i-HPMC yokuqala inokusasazwa ngokufanayo emanzini ashushu kwaye emva koko inyibilikiswe ngokukhawuleza ngexesha lokupholisa. Iindlela ezimbini eziqhelekileyo zichazwa ngolu hlobo lulandelayo: 1), ibekwe kwisikhongozeli Faka isixa esifunekayo samanzi ashushu kunye nobushushu ukuya kuma-70°C. I-Hydroxypropyl methylcellulose yongezwa ngokuthe ngcembe ngokushukumisa kancinci, kwaye i-HPMC yadada phezu kwamanzi, kwaye emva koko kwenziwa i-slurry, kwaye i-slurry yapholiswa ngokuvuselela. 2) Ukongeza i-1/3 okanye i-2/3 yomthamo ofunekayo wamanzi kwisitya kunye nokufudumeza kwi-70 ° C, ukusabalalisa i-HPMC ngokwe-1) ukulungiselela i-slurry yamanzi ashushu; emva koko ungeze inani eliseleyo lamanzi abandayo kumanzi ashushu Kwi-slurry, umxube upholile emva kokuvuselela. Indlela yokuxuba i-powder: i-HPMC powder ixutywe kunye nomthamo omkhulu wezinye izinto ze powdery, ixutywe ngokucokisekileyo kunye ne-blender, ize ichithwe ngamanzi. Ngeli xesha, HPMC inokunyibilika ngaphandle agglomeration, kuba ikona encinane ngalinye HPMC encinane kuphela. Umgubo uya kunyibilika ngokukhawuleza xa udibana namanzi. – Le ndlela isetyenziswa yi putty powder kunye nabavelisi bodaka. IHydroxypropyl methylcellulose (HPMC) isetyenziswa njengento etyebisayo kunye nearhente yokugcina amanzi kwiputty mortar.
Ungawugweba njani umgangatho we-hydroxypropyl methylcellulose (HPMC) ngokulula nangokucacileyo?
(1) Ubumhlophe: Nangona ubumhlophe bungenako ukugqiba ukuba i-HPMC ilula ukuyisebenzisa, kwaye ukuba yongezwa kwi-brightener ngexesha lenkqubo yokuvelisa, iya kuchaphazela umgangatho wayo. Nangona kunjalo, iimveliso ezilungileyo kakhulu zimhlophe. (2) Ukulunga: Ukulunga kwe-HPMC ngokubanzi kune-80 mesh kunye ne-100 mesh, kunye ne-120 mesh ingaphantsi. Okukhona ukucoleka, kokukhona kungcono ngokubanzi. (3) Ukuhanjiswa: Faka i-hydroxypropyl methylcellulose (HPMC) emanzini ukwenza i-colloid ecacileyo, kwaye ujonge ukucaca kwayo. Okukhona uthumelo lungcono, kokukhona izinto ezinganyibilikiyo zincinci. . Ireactor eme nkqo inokungena kakuhle, kwaye ireactor ethe tyaba imbi kakhulu, kodwa ayithethi ukuba umgangatho wereactor othe nkqo ungcono kunalowo weketile. Umgangatho wemveliso unqunywe yimiba emininzi. (4) Umxhuzulane okhethekileyo: Okukhona usiba mkhulu umxhuzulane othile, kokukhona unzima ngakumbi. Umlinganiselo mkhulu, ngokuqhelekileyo ngenxa yokuba umxholo weqela le-hydroxypropyl uphezulu, kwaye umxholo weqela le-hydroxypropyl uphezulu, ukugcinwa kwamanzi kungcono.
Yintoni ubungakanani be-hydroxypropyl methylcellulose (HPMC) kwi-putty powder?
Isixa somgangatho wokwakha HPMCesetyenziswa kwizicelo ezisebenzayo ziyahlukahluka kunye nemozulu, ubushushu, umgangatho wendawo ye-ash calcium, ifomula ye-putty powder kunye "nomgangatho ofunwa ngabathengi". Ngokubanzi, phakathi kwe-4 kg kunye ne-5 kg. Umzekelo: indawo ebandayo yeputty powder, ininzi ibeka i-5 kg; Indawo eshushu kakhulu yi-5 kg ehlotyeni kunye ne-4.5 kg ebusika.
Yintoni i-viscosity ye-hydroxypropyl methylcellulose (HPMC)?
Umgubo weputty eludongeni ngokuqhelekileyo uyi-100,000, kwaye udaka olomileyo lufuneka ukuba lube phezulu. Kuyimfuneko ukusebenzisa i-150,000. Ngaphezu koko, eyona ndima ibalulekileyo ye-HPMC kukugcina amanzi, kulandele ukujiya. Kwi-putty powder, ngokude nje ukugcinwa kwamanzi kulungile, i-viscosity iphantsi (70,000-80,000), nayo inokwenzeka. Ngokuqinisekileyo, i-viscosity inkulu, ukugcinwa kwamanzi okuhambelanayo kungcono. Xa i-viscosity idlula i-100,000, umphumo we-viscosity ekugcinweni kwamanzi ayikho enkulu kakhulu.
Zeziphi iimpawu eziphambili zobugcisa ze-hydroxypropyl methylcellulose (HPMC)?
Umxholo weHydroxypropyl kunye ne-viscosity, abaninzi abasebenzisi banenkxalabo malunga nezi zikhombisi zimbini. Ukuba umxholo wehydroxypropyl uphezulu, ugcino lwamanzi lungcono. I-Viscosity, ukugcinwa kwamanzi, isihlobo (kunokuba i-absolute), kunye ne-viscosity ephezulu, ingcono kwi-cement mortar.
Zeziphi ezona zixhobo ziphambili ze-hydroxypropyl methylcellulose (HPMC)?
Izinto eziphambili ze-hydroxypropyl methylcellulose (HPMC): i-cotton ecocekileyo, i-methyl chloride, i-propylene oxide, ezinye izinto eziluhlaza, ezifana ne-caustic soda, i-asidi, i-toluene, i-isopropanol.
Iyiphi indima ephambili ye-HPMC ekusebenziseni i-putty powder?
I-HPMC idlala indima yokuqina, ukugcinwa kwamanzi kunye nokwakhiwa kwiputty powder. Ukuqina: I-Cellulose inokugqithwa ukuze inqunyanyiswe, gcina isisombululo ngokulinganayo, kwaye uxhathise i-sag. Ukugcinwa kwamanzi: I-putty powder yomiswa ngokukhawuleza, kwaye i-calcium ash encedisayo isabela phantsi kwesenzo samanzi. Ukwakhiwa: I-Cellulose inefuthe lokuthambisa, elinokwenza ukuba i-putty powder ibe nokusebenza kakuhle. I-HPMC ayithathi nxaxheba kuyo nayiphi na imichiza kwaye idlala indima exhasayo kuphela. I-putty powder ngamanzi, eludongeni, i-chemical reaction. Ngenxa yokubunjwa kwezinto ezintsha, i-putty powder eludongeni ikhutshwe eludongeni, igayiwe ibe ngumgubo, kwaye isetyenziswe kwakhona, ayiyi kusebenza, kuba into entsha yenziwe (i-calcium carbonate). ). Amacandelo aphambili e-ash calcium powder zezi: Ca (OH) 2, umxube weCaO kunye nexabiso elincinci leCaCO3, CaO+H2O=Ca(OH)2-Ca(OH)2+CO2=CaCO3+H2O ash calcium in amanzi kunye nomoya Ngaphantsi kwesenzo se-CO2, i-calcium carbonate yenziwe, kwaye i-HPMC igcina amanzi kuphela, incedisa ukusabela okungcono kwe-ash calcium, kwaye ayithathi nxaxheba kuyo nayiphi na impendulo ngokwayo.
I-HPMC yi-ether ye-cellulose engeyo-ionic, ngoko ke yintoni i-non-ion?
Ngokuqhelekileyo, i-non-ion yinto engekho emanzini kwaye ayinayo i-ionized. Ionization ibhekisela kwinkqubo apho i-electrolyte idityaniswe kwi-ion ehamba ngokukhululekileyo ehlawuliswayo kwi-solvent ethile efana namanzi okanye utywala. Ngokomzekelo, ityuwa edliwa yonke imihla, i-sodium chloride (NaCl), i-ionized ukuvelisa i-sodium ions yamahhala (Na +) ihlawuliswe kakuhle kunye ne-chloride (Cl) ihlawuliswe kakubi. Oko kukuthi, i-HPMC ifakwe emanzini kwaye ayidibanisi kwii-ion ezihlawuliswayo, kodwa ikhona ngendlela yeemolekyuli.
Buthini ubushushu bejeli yehydroxypropyl methylcellulose?
Ubushushu bejeli ye-HPMC inxulumene nomxholo wayo we-methoxy. Ukunciphisa umxholo we-methoxy, uphezulu ubushushu be-gel.
Ngaba i-powder ye-putty inalo naluphi na ubudlelwane kunye ne-HPMC?
Umgubo we-putty unxulumene kakhulu nomgangatho we-gray calcium, kwaye awunanto encinci yokwenza ne-HPMC. Umxholo ophantsi we-calcium we-ash calcium kunye nomlinganiselo ongafanelekanga we-CaO kunye ne-Ca (OH) 2 kwi-ash calcium iya kubangela ukulahleka kwe powder. Ukuba ihambelana ne-HPMC, ngoko ukuba ukugcinwa kwamanzi kwe-HPMC kubi, kuya kubangela ukulahleka kwe powder.
Uthini umahluko phakathi kohlobo lwangoko nangoko lwamanzi abandayo kunye nohlobo olushushu olunyibilikayo lwe-hydroxypropyl methylcellulose kwinkqubo yokuvelisa? Amanzi abandayo e-HPMC aphathwa ngoko nangoko nge-glyoxal, kwaye asasazwa ngokukhawuleza emanzini abandayo, kodwa awanyibiliki ngokwenene. Xa i-viscosity iphakanyisiwe, iyachithwa. Ifom ye-soluble eshushu ayiphathwanga phezulu nge-glyoxal. Xa inani le-glyoxal likhulu, ukusabalalisa ngokukhawuleza, kodwa i-viscosity iyacotha.
Yintoni ivumba le-hydroxypropyl methylcellulose (HPMC)?
I-HPMC eveliswa yindlela yokunyibilikisa isebenzisa i-toluene kunye ne-isopropyl alcohol njengezinyibilikisi. Ukuba ukuhlamba akukuhle kakhulu, kuya kubakho incasa eseleyo.
Indlela yokukhetha i-hydroxypropyl methylcellulose (HPMC) efanelekileyo ngeenjongo ezahlukeneyo?
Ukusetyenziswa kwe-putty powder: imfuno iphantsi, i-viscosity yi-100,000, ilungile, into ebalulekileyo kukugcina amanzi angcono. Ukusetyenziswa komdaka: iimfuno eziphezulu, i-viscosity ephezulu, i-150,000 ingcono. Ukusetyenziswa kweglue: Kufuneka imveliso yohlobo olukhawulezayo, i-viscosity ephezulu.
Yintoni igama le-hydroxypropyl methylcellulose?
Hydroxypropyl methylcellulose, HydroxypropylMethylCellulose Isifinyezo: HPMC okanye MHPC alias: hypromellose; i-cellulose hydroxypropyl methyl ether; I-Hypromellose, i-Cellulose ether, i-2-hydroxypropylmethyl Cellulos eether. I-Cellulose hydroxypropyl methyl ether, iHyprolose.
Ukusetyenziswa kwe-HPMC kwi-putty powder, yintoni imbangela ye-foam kwi-putty powder?
I-HPMC idlala indima yokuqina, ukugcinwa kwamanzi kunye nokwakhiwa kwiputty powder. Musa ukuthatha inxaxheba kuyo nayiphi na impendulo. Isizathu seqamza: 1, amanzi maninzi kakhulu. 2, umaleko ongezantsi awomile, susa nje umaleko phezulu, kulula ukuphosa amagwebu.
Ifomula yomgubo weputty yangaphakathi nangaphandle?
Ngaphakathi eludongeni putty powder: enzima calcium 800KG grey calcium 150KG (starch ether, eluhlaza esulungekileyo, umhlaba penmine, citric acid, polyacrylamide, njl ingakhethwa ngokufanelekileyo ukongeza)
I-putty yodonga lwangaphandle: i-samente 350KG, i-calcium enzima 500KG, isanti ye-quartz 150KG, i-latex Powder 8-12KG, i-cellulose ether 3KG, isitashi se-ether 0.5KG, i-wood fiber 2KG
Yintoni umahluko phakathi kwe-HPMC kunye ne-MC?
I-MC yi-methyl cellulose. Emva kokuba umqhaphu ocociweyo uphathwe nge-alkali, i-chloromethane isetyenziselwa i-etherifying agent, kwaye uchungechunge lweempendulo zenziwa ukulungiselela i-cellulose ether. Iqondo lokutshintshwa ngokubanzi ngu-1.6 ukuya ku-2.0, kwaye iqondo lokutshintshwa liyahluka ngokuxhomekeke kunyinyibiliko. yeye-nonionic cellulose ether.
(1) Ukugcinwa kwamanzi kwe-methyl cellulose kuxhomekeke kwixabiso lokongezwa, i-viscosity, i-particle fineness kunye nesantya sokuchithwa. Ngokuqhelekileyo, inani lokongezwa likhulu, ukulunga kuncinci, kwaye i-viscosity inkulu, kwaye izinga lokugcinwa kwamanzi liphezulu. Isixa esongezelelweyo sinempembelelo enkulu kwizinga lokugcinwa kwamanzi, kwaye inqanaba le-viscosity alilingani nomlinganiselo wokugcinwa kwamanzi. Izinga lokutshatyalaliswa lixhomekeke ngokukodwa kwiqondo lokuguqulwa komphezulu we-cellulose particles kunye ne-fineness of particles. Phakathi kwezi zingentla ze-cellulose ethers, i-methylcellulose kunye ne-hydroxypropylmethylcellulose inezinga eliphezulu lokugcinwa kwamanzi.
(2) I-Methylcellulose iyanyibilika emanzini abandayo, kwaye kunzima ukuyinyibilika emanzini ashushu. Isisombululo samanzi sizinzile kakhulu kuluhlu lwe-pH = 3 ~ 12. Inokuhambelana kakuhle nestatshi, iguar gum kunye nezinye ezininzi ii-surfactants. Xa iqondo lokushisa lifikelela kwiqondo lokushisa, i-gelation phenomenon iyenzeka.
(3) Ukutshintsha kweqondo lobushushu kuyakuchaphazela kakhulu izinga lokugcinwa kwamanzi kwi-methyl cellulose. Ngokuqhelekileyo, okukhona ubushushu buphezulu, kokukhona ukugcinwa kwamanzi kubi. Ukuba iqondo lokushisa lomdaka lidlula i-40 ° C, ukugcinwa kwamanzi kwe-methyl cellulose kuya kuba nzima kakhulu, okuchaphazela kakhulu ukusebenza kodaka.
(4) I-Methyl cellulose inefuthe elibonakalayo ekusebenzeni kunye nokunamathela komdaka. “Ukuncamathela” apha kubhekisa kumandla okuncamathelisa avakala phakathi kwesixhobo sokusebenza somsebenzi kunye nenxalenye yodonga, oko kukuthi, ukuxhathisa kokucheba kodaka. I-adhesion inkulu, ukuxhathisa kwe-shear yodaka kukhulu, amandla afunwa ngumsebenzi ngexesha lokusetyenziswa nawo mkhulu, kwaye ukusebenza kodaka kubi.
I-Methylcellulose adhesion iphakathi kwiimveliso ze-cellulose ether. I-HPMC yi-hydroxypropylmethylcellulose, eyi-nonionic cellulose exutywe i-ether elungiselelwe uchungechunge lweempendulo usebenzisa i-acetal oxide kunye ne-methyl chloride njenge-etherifying agent emva kwe-alkalization yekotoni esulungekileyo. Iqondo lokutshintshwa ngokubanzi li-1.2 ukuya ku-2.0. Ubume bayo buhluke ngokuxhomekeke kumlinganiselo we-methoxyl umxholo kunye nomxholo we-hydroxypropyl.
(1) IHydroxypropyl methylcellulose inyibilika lula emanzini abandayo, kwaye kusenokuba nzima ukuyinyibilikisa emanzini ashushu. Nangona kunjalo, ubushushu bayo be-gelation emanzini ashushu buphezulu kakhulu kune-methyl cellulose. Ukunyibilika kumanzi abandayo kukwangcono kakhulu kune-methyl cellulose. -
(2) I-viscosity ye-hydroxypropylmethylcellulose ihambelana nesisindo se-molecular yayo, kwaye i-viscosity iphezulu xa ubunzima be-molecular bukhulu. Ubushushu buchaphazela i-viscosity yayo, ukunyuka kweqondo lokushisa, kwaye i-viscosity iyancipha. Nangona kunjalo, i-viscosity yayo inobushushu obuphantsi kune-methyl cellulose. Isisombululo saso sizinzile kwiqondo lokushisa.
(3) I-Hydroxypropyl methylcellulose izinzile kwi-acids kunye neziseko, kwaye isisombululo saso samanzi sizinzile kakhulu kuluhlu lwe-pH = 2 ~ 12. I-soda ye-Caustic kunye namanzi e-lime ayinayo impembelelo eninzi kwiipropati zabo, kodwa i-alkali ikhawuleza isantya sokuchithwa kunye nokwandisa i-viscosity. I-Hydroxypropyl methylcellulose inozinzo kwiityuwa eziqhelekileyo, kodwa xa ukuxinwa kwesisombululo setyuwa kuphezulu, i-viscosity yesisombululo se-hydroxypropyl methylcellulose ivame ukunyuka.
(4) Ukugcinwa kwamanzi kwe-hydroxypropyl methylcellulose kuxhomekeke kwixabiso lokongezwa, i-viscosity, njl., kwaye izinga lokugcinwa kwamanzi phantsi kwesixa esifanayo liphezulu kunelo le-methylcellulose.
(5) I-Hydroxypropyl methylcellulose inokuxutywa kunye ne-polymer compound e-soluble yamanzi ukuze yenze i-uniform, isisombululo esiphezulu se-viscosity. Okufana ne-polyvinyl alcohol, i-ether ye-starch, i-gum yemifuno kunye nokunye okunjalo.
(6) I-Hydroxypropyl methylcellulose ine-adhesion ephezulu kumdaka kune-methyl cellulose.
(7) I-Hydroxypropyl methylcellulose inokumelana ne-enzymatic engcono kune-methylcellulose, kwaye isisombululo sayo asinakwenzeka ukuba sithotywe nge-enzymatic kune-methylcellulose.
HPMC viscosity kunye nobudlelwane bobushushu, yintoni ekufuneka iqwalaselwe kwizicelo ezibonakalayo?
I-viscosity ye-HPMC ihambelana ngokungafaniyo neqondo lokushisa, oko kukuthi, i-viscosity iyanda ngokuhla kweqondo lokushisa. I-viscosity yemveliso esidla ngokubhekisela kuyo sisiphumo sokuvavanya isisombululo sayo se-2% se-aqueous kwiqondo lokushisa lama-20 degrees Celsius. Kwizicelo ezisebenzayo, kwiindawo ezinomahluko omkhulu wokushisa phakathi kwehlobo nobusika, kufuneka kuqatshelwe ukuba kucetyiswa ukuba kusetyenziswe i-viscosity ephantsi kakhulu ebusika, ehambelana nokwakhiwa. Ngaphandle koko, xa iqondo lokushisa liphantsi, i-viscosity ye-cellulose iya kwanda, kwaye xa ikhutshiwe, ukuvakalelwa kwesandla kuya kuba nzima. I-viscosity ephakathi: 75000-100000 Ikakhulu isetyenziselwa i-putty Isizathu: ukugcinwa kwamanzi kwi-viscosity ephezulu: 150000-200000 isetyenziselwa ikakhulu i-polystyrene granule insulation mortar powder kunye ne-vitrified microbead insulation mortar. Isizathu: i-viscosity ephezulu, udaka alulula ukuwa Ewe, sag, ukwakhiwa okuphuculweyo. Kodwa ngokubanzi, ukuphakama kwe-viscosity, ngcono ukugcinwa kwamanzi, izityalo ezininzi zodaka ezomileyo ziqwalasela iindleko, zibuyisela i-cellulose ye-viscosity ephakathi kunye ne-viscosity ephakathi (75000-100000). (20000-40000) ukunciphisa imali eyongeziweyo.
Ixesha lokuposa: Jan-07-2019