HPMC tuaj yeem sib faib ua qib kev tsim kho, khoom noj thiab cov qib tshuaj raws li lub hom phiaj. Tam sim no, feem ntau ntawm cov khoom lag luam yog cov qib kawm, thiab hauv cov qib tsim kho, tus nqi ntawm cov hmoov uas muaj zaub muaj cov hmoov loj heev. Sib tov HPMC hmoov nrog cov khoom loj ntawm lwm cov hmoov txhuv nplej, muab cov hmoov txhuas kom huv, thiab tom qab ntawd HPMC me ntsis ntawm HPMC hmoov, ntsib dej. yuav yaj tam sim ntawd. Putty hmoov thiab cug tuam ntxhab manufacturers feem ntau siv hom no. HydroxyPropyyl Metylcellulose (HPMC) yog siv los ua cov tuab thiab dej rov ua kom huv huv.
Qhov kub thiab txias ntawm HPMC muaj feem cuam tshuam nrog nws cov ntsiab lus methoxy, qis dua cov ntsiab lus methoxy ↓, qhov ntau dua cov khoom kub siab dua. Cov dej txias tam sim ntawm HPMC yog cov npoo-kho nrog glyoxal, thiab nws disperses sai sai hauv dej txias, tab sis nws tsis paub tiag tiag. Nws tsuas yaj tag thaum viscosity nce. Kub qhuav hom tsis yog cov npoo kho nrog glyoxal. Yog tias tus nqi ntawm glyoxal yog loj, kev dispersion yuav tau nrawm, tab sis cov viscosity yuav nce qeeb, thiab yog tias tus nqi me, qhov fab ntxeev yuav muaj tseeb. HPMC tuaj yeem faib ua cov hom khoom lag luam tseem ceeb thiab kev kub. Cov khoom lag luam tseem ceeb sai sai rau hauv dej txias thiab ploj mus rau hauv dej. Nyob rau lub sijhawm no, cov kua tsis muaj viscosity vim HPMC tsuas yog dispersed hauv dej yam tsis muaj kev sib cais tiag. Kwv yees li 2 feeb, lub viscosity ntawm cov kua maj mam nce, kev sib sau pob tshab viscous colloid. Cov khoom kub kub yaj, thaum ntsib nrog dej txias, tuaj yeem tawg nrawm nrawm hauv dej kub thiab ploj hauv dej kub. Thaum qhov kub thiab txias rau qhov kub thiab txias, qhov dav dav yuav maj mam tshwm sim kom txog thaum nws tsim lub pob tshab viscous colloid. Qhov kub-melt hom tsuas yog siv rau hauv cov hmoov ua kom muaj hmoov thiab tshuaj khib. Hauv cov kua nplaum kua thiab pleev xim, yuav muaj pab pawg tshwm sim thiab tsis tuaj yeem siv. Cov hom tseem ceeb muaj cov kev siv dav dav. Nws tuaj yeem siv tau hauv cov hmoov ua kom muaj hmoov thiab tshuaj khib, nrog rau kua nplaum ua kua thiab pleev xim, tsis muaj cov contraindications.
HPMC tau tsim los ntawm cov txheej txheem hnyav siv tau toluene thiab isopropanol raws li cov kuab tshuaj. Yog hais tias ntxuav tsis zoo heev, yuav muaj qee cov ntxhiab tsw. Daim ntawv thov ntawm Putty Hmoov: Qhov xav tau yog tsawg, viscosity yog 100,000, nws yog qhov txaus, qhov tseem ceeb yog kom dej kom zoo. Daim ntawv thov ntawm cug: qhov yuav tsum tau muaj, siab viscosity, 150,000 yog qhov zoo dua. Daim ntawv thov ntawm cov kua nplaum: Cov khoom tseem ceeb uas yuav tsum muaj viscosity siab. Tus nqi ntawm HPMC siv hauv kev siv cov kev siv tau sib txawv raws li kev nyab xeeb puag ncig ntawm kev nyab xeeb puag ncig ntawm cov neeg muaj kev nyab xeeb thiab "zoo uas yuav tsum tau ua los ntawm cov neeg siv khoom". Lub viscosity ntawm hydroxypropylulose (hpmc) -puterty hmoov feem ntau yog 100,000, thiab cov cai yuav tsum tau siv 150,000 yuav tsum tau yooj yim siv. Ntxiv mus, txoj haujlwm tseem ceeb ntawm HPMC yog dej tuav, ua raws li thickening. Nyob rau hauv cov hmoov putty, tsuav li lub taub dej ceev yog qhov zoo thiab lub viscosity yog tsawg (70,000-80,000), nws tseem ua tau. Ntawm chav kawm, qib siab dua viscosity, zoo dua cov txheeb ze cov dej rov qab khaws cia. Thaum lub viscosity tshaj 100,000, lub viscosity yuav cuam tshuam rau cov dej tuav tseg. Tsis ntau; Cov uas muaj cov ntsiab lus hydroxyproprots feem ntau muaj cov dej ua kom zoo dua. Ib qho nrog cov viscosity siab muaj cov dej siab zoo dua, thiab ib qho nrog viscosity siab yog qhov zoo dua siv hauv xis.
Hauv cov hmoov putty, hpmc ua si peb lub luag haujlwm ntawm thickening, dej tuav thiab tsim kho. Tsis txhob koom nrog txhua yam kev tawm tsam. Qhov laj thawj rau cov npuas tej zaum yuav muab cov dej ntau dhau yog muab tso rau hauv, lossis nws yog ib txheej hauv qab yog tsis qhuav, thiab nws yooj yim rau ua npuas ncauj. Thickening cov nyhuv ntawm HPMC hauv Putty Hmoov: Thee cov cellulose tuaj yeem ua rau ncua, ua kom cov kev daws teeb meem thiab tawm tsam, thiab tiv taus sagging. Cov dej khaws cov nyhuv ceev ntawm HPMC hauv cov hmoov putty: ua kom cov hmoov putty qhuav, thiab pab cov tshuaj ntsuab maj mam muab los ua kom muaj kev cuam tshuam hauv qab dej. Kev tsim kho cov nyhuv ntawm HPMC hauv Weety Hmoov: Cellulose muaj cov nyhuv lubricating, uas tuaj yeem ua rau cov hmoov puty muaj kev tsim kho kom zoo. HPMC tsis koom nrog kev siv tshuaj lom neeg, tab sis tsuas yog ua lub luag haujlwm pab pawg.
Cov hmoov poob ntawm cov hmoov putty yog feem ntau cuam tshuam nrog qhov zoo ntawm cov ntug dej tshauv, thiab muaj me ntsis los ua HPMC. Cov ntsiab lus tsawg dua ntawm grey calcium thiab tus tsis raug cai ntawm sabo thiab ca (Oh) 2 hauv grey calcium yuav ua rau hmoov hmoov. Yog tias nws muaj qee yam ua nrog HPMC, ces yog tias cov dej tuav HPMC tsis zoo, nws tseem yuav ua rau cov hmoov kom poob. Ntxiv cov dej rau cov hmoov putty thiab muab nws tso rau ntawm phab ntsa yog tsim cov tshuaj tiv thaiv, thiab cov hmoov txhuas yog cov khoom siv tawm ntawm phab ntsa. Down, av mus ua hmoov, thiab rov siv dua, nws yuav tsis ua haujlwm, vim tias cov tshuaj tshiab (calcium carbonate) tau tsim. Lub ntsiab ntawm cov hmoov tshauv calcium hmoov yog: sib xyaw ntawm Ca (Oh) 2, CAO thiab ib qho me me ntawm CaCo3, CA (OH) 2 ↓ + H2O HHE + ASH FOSCAS yog nyob rau hauv dej thiab huab cua nyob rau hauv kev txiav txim ntawm CO2, calcium carbonate yog tsim tawm, thaum HPMC tsuas yog khaws cov tshuaj ntsuab zoo dua, thiab tsis koom nrog txhua yam kev siv tshuaj.
Lub sij hawm ncua: Mar-18-2023