N,N{0}}dimethylformamide(DMF) yog ib qho organic compound nrog CAS 68-12-2 thiab molecular mis HCON (CH3) 2. Nws yog cov kua tsis muaj xim thiab pob tshab nrog cov ntxhiab tsw tshwj xeeb, thiab tuaj yeem tov nrog dej, ethanol, ether, aldehydes, ketones, esters, halogenated hydrocarbons, thiab aromatic hydrocarbons. Tsuas yog rau halogenated hydrocarbons, nws tuaj yeem sib xyaw nrog dej thiab cov kuab tshuaj organic feem ntau, thiab muaj kev sib xyaw zoo rau ntau yam organic thiab inorganic compounds. Lub refractive index yog 1.4458 ntawm 25 degree, qhia tau hais tias ib tug high optical purity. Nn dmf tuaj yeem yaj ntau cov organic sib txuas thiab cov resins, yog li nws feem ntau siv los ua cov kuab tshuaj. Nws kuj yog me ntsis soluble hauv dej. Qhia tias nws muaj cua sov ntawm evaporation. Nws kuj muaj qis dua vapor siab thiab siab dua thermal stability. Cov khoom siv lub cev no ua rau nws muaj txiaj ntsig zoo heev thiab cov tshuaj tiv thaiv tshuaj nruab nrab hauv ntau daim ntawv thov kev lag luam, xws li synthesis, extraction, thiab electroplating. Nws tsis yog tsuas yog siv dav siv tshuaj raw khoom, tab sis kuj yog cov kuab tshuaj zoo heev. NN dimethylformamide dmf kuj tseem ua lub luag haujlwm tseem ceeb hauv kev tsim cov khoom siv polymer. Nws tuaj yeem siv los ua cov kuab tshuaj thiab cov tshuaj tiv thaiv nruab nrab los npaj cov ntaub ntawv polymer xws li polyamide, polyurethane, thiab polyacrylonitrile. Cov ntaub ntawv polymer no muaj kev siv dav hauv kev lag luam, kev tsim kho, kev kho mob, thiab lwm yam.
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Tshuaj Formula |
C3H7 Nr |
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Exact Mass |
73 |
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Molecular Luj |
73 |
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m/z |
73 (100.0%), 74 (3.2%) |
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EA |
C, 49.30; H, 9.65; N, 19.16; O, 21.89 |
Melting point -61 ° C (lit.), Kev sib hloov tshwj xeeb 0.94 º, Boiling point 153 ° C (lit.), Qhov ntom ntom 0.944 g / ml (lit.), Vapor ntom 2.5 (vs huab cua), Vapor siab 2.7 mmHg (20℃C), Refractive / 0.0 lit index. 136℃f, Cia txias cia ntawm +5℃C mus rau +30℃C, Dej: miscible, Form hmoov, Acidity coefficient (PKA) -0.44 ± 0.70 (predicted), Xim apha: Tsawg dua los yog sib npaug rau 15, PH tus nqi 7 (200g/l, 0.3 degree, H20, H2O, Cov ntxhiab tsw phem, ammonia zoo li tsw tuaj yeem pom ntawm 100 ppm, Cov ntxhiab tsw pib 1.8ppm, Kev txwv 2.2-16% (V), Dej soluble, Qhov siab tshaj plaws wavelength (λ max) λ: 270 nm Amax: 1.00, λ: max: 275 nm. max: λ: 275 nm. 0.10, λ: 310 nm Amax: 0.05, λ: 340-400 nm Amax: 0.01, rhiab heev hygroscopic.
N,N{0}}Dimethylformamide ntshiabtuaj yeem npaj los ntawm cov tshuaj tiv thaiv ntawm formamide nrog diamine, los yog los ntawm cov tshuaj tiv thaiv ntawm methanol tov ntawm dimethylamine nrog carbon oxide nyob rau hauv lub xub ntiag ntawm sodium cawv. N. N-dimethylformamide yog cov kuab tshuaj zoo heev rau ntau yam polymers xws li polyethylene, polyethylene, polyacrylonitrile, polyamide, thiab lwm yam. nws yog dav siv hauv yas zaj duab xis ua, xim, fiber ntau thiab lwm yam lag luam. Nws kuj tseem siv tau los ua cov xim pleev xim kom tshem tawm cov xim. Nws muaj peev xwm yaj ib co pigments nrog tsawg solubility thiab ua rau cov pigments muaj cov yam ntxwv ntawm dyes. N. N-methyl formyl Amine kuj tuaj yeem siv los ua cov tshuaj reagent kom cais cov khoom tsis yog hydrocarbon los ntawm paraffin. Nws muaj kev xaiv zoo rau kev solubility ntawm terephthalic acid thiab isophthalic acid, thiab tuaj yeem sib cais hauv N, N-dimethylformamide.
N. N-dimethylformamide (DMF) yog cov kua tsis muaj xim thiab pob tshab nrog cov mis molecular C ∝ H ₇ NO. Vim nws cov khoom siv tshuaj lom neeg tshwj xeeb, nws tau dhau los ua ib qho ntawm feem ntau siv tsis yog proton polar solvents hauv kev lag luam tshuaj. Lub steric hindrance nyhuv ntawm methyl pawg nyob rau hauv nws cov qauv molecular ho txhim kho qhov tsis zoo ion kev ua si, uas ua rau nws irreplaceable nyob rau hauv cov teb xws li organic synthesis, cov khoom ua, thiab kev tsim tshuaj. Cov nram qab no piav qhia txog nws cov kev siv hauv kev nthuav dav los ntawm yim qhov chaw tseem ceeb.
DMF muaj zoo heev solubility rau ntau yam polymers thiab yog ib qho tseem ceeb hnyav rau hluavtaws fiber ntau thiab yas ua
1.Synthetic fiber ntau teb
DMF yog tus txheej txheem hnyav rau ntub spinning ntawm polyacrylonitrile fibers, uas tsim ib tug uniform spinning tov los ntawm dissolving acrylonitrile polymer thiab solidifies nws nyob rau hauv ib tug coagulation da dej kom tau siab - zog fibers. Hauv kev tsim cov acrylic fiber ntau, DMF, raws li cov kuab tshuaj qhuav spinning, tuaj yeem tsim cov qauv ntawm cov tawv nqaij hauv cov ntoo khaub lig fiber ntau -section, txhim kho cov rwb thaiv tsev ntawm cov fiber ntau.
2. Polyurethane kev lag luam
DMF yog cov kuab tshuaj tseem ceeb rau cov txheej txheem ntub dej polyurethane hluavtaws tawv, thiab nws cov khoom kub kub kub tuav ruaj khov ntawm cov tshuaj polyurethane.
Los ntawm impregnating lub substrate thiab solidifying, hluavtaws tawv nrog tiag tawv zoo nkauj tuaj yeem npaj. Hauv kev tsim cov polyurethane elastomers, DMF ua lub luag haujlwm nruab nrab los txhawb cov tshuaj tiv thaiv polymerization ntawm isocyanates thiab polyols, uas ua rau muaj zog tensile ntawm cov khoom mus rau ntau tshaj 35MPa.
3. Cov txheej txheem yas
N,N{0}}Dimethylformamide ntshiabtuaj yeem siv los ua cov yeeb yaj kiab polyvinyl chloride (PVC) . Los ntawm dissolving PVC resin thiab ntxiv plasticizers, pob tshab zaj duab xis nrog transmittance ntawm 92% tuaj yeem npaj tau. Hauv kev hloov kho polyamide (PA), DMF ua cov kuab tshuaj tuaj yeem ua tiav cov khoom tawg ntawm nano silica hauv matrix, ua rau cov khoom hnav tsis kam ntawm 40%.
DMF yog ib qho hnyav thiab cov tshuaj tiv thaiv nruab nrab hauv cov tshuaj synthesis, thiab yog ib qho tseem ceeb ntawm cov khoom siv raw hauv kev lag luam niaj hnub no.
1. Tshuaj tua kab mob synthesis
Hauv kev tsim cov doxycycline, DMF yog siv los ua cov kuab tshuaj los txhawb cov tshuaj tiv thaiv cyclization, ua rau cov khoom lag luam nce mus txog 85%. Nws qhov chaw tsis yog protonic tuaj yeem txhim kho cov qauv nruab nrab. Nyob rau hauv cov synthesis ntawm sulfamethoxazole, DMF nruab nrab txo cov tshuaj tiv thaiv kub los ntawm 20 degree, thiab cov khoom purity mus txog 99.5%.
2. Kev npaj cov tshuaj hormones
Thaum lub sij hawm synthesis ntawm cortisone, DMF ua raws li cov kuab tshuaj rau cov steroid core thiab txhim kho cov tshuaj tiv thaiv xaiv los ntawm chelating hlau catalysts.
Hauv kev tsim cov vitamin B6, cov kuab tshuaj sib xyaw ua ke ntawm DMF thiab dichloromethane tuaj yeem txo lub sijhawm cov tshuaj tiv thaiv mus rau ib qho - peb ntawm cov txheej txheem ib txwm muaj.
3. Kev txhim kho ntawm cov tshuaj tiv thaiv -cov tshuaj qog
Hauv kev sib xyaw ntawm N-formylsarcolysin, DMF yog siv los ua cov kuab tshuaj rau acylation reagents, thiab cov khoom siv lead ua yog ua kom ruaj khov los ntawm kev tswj cov tshuaj tiv thaiv pH. Hauv kev npaj ntawm cycloheximide, DMF nruab nrab tuaj yeem cuam tshuam qhov tshwm sim ntawm kev tawm tsam sab nraud thiab ua rau kom muaj kev xaiv ntawm cov khoom lag luam rau 92%.
DMF tau dhau los ua cov reagent tseem ceeb hauv cov txheej txheem tshuaj sib cais vim nws qhov tshwj xeeb solubility selectivity
1. Butadiene Extraction
Hauv kev sib cais ntawm C4 feem ntawm ethylene cracking gas, DMF muaj solubility rau butadiene uas yog 300 npaug ntau dua li ntawm n-butane. Los ntawm kev siv ob -theem extraction distillation txheej txheem, purity ntawm butadiene tuaj yeem ncav cuag 99.6% thiab tus nqi rov qab tuaj yeem ncav cuag 99.2%. Cov thev naus laus zis no yog siv rau cov tuam txhab petrochemical loj hauv Suav teb, nrog rau kev ua haujlwm txhua xyoo ntawm ntau tshaj 500000 tons.
2. Aromatic refining
Qhov sib txawv ntawm qhov sib txawv ntawm DMF rau isophthalic acid thiab terephthalic acid yog txog li 15%, thiab kev sib cais zoo ntawm ob isomers tuaj yeem ua tiav los ntawm cov txheej txheem fractional crystallization. Hauv kev tsim cov PX (p-xylene), DMF raws li ib qho adsorbent tuaj yeem ua kom cov khoom huv huv mus rau 99.9%, ua tau raws li qhov siab -kawg cov kev cai ntawm kev lag luam polyester.
3. Gas purification
DMF, raws li ib tug natural gas desulfurization hnyav, muaj ib tug solubility ntawm 2.8mol / kg rau H ₂ S ntawm 40 degree, uas yog peb npaug ntawm diethylene glycol. Tom qab daim ntawv thov ntawm DMF desulfurization ntaus ntawv nyob rau hauv ib tug tej yam roj teb, lub natural gas purification℃tau mus txog lub teb chaws thawj -chav kawm gas standard, thiab cov sulfur rov qab tus nqi nce mus rau 98.5%.
DMF plays ntau lub luag haujlwm tseem ceeb hauv kev tsim khoom microelectronics:
1. LCD (Liquid Crystal Display)
Hauv TFT-LCD kev tsim khoom, DMF yog siv los ua cov khoom siv hluav taws xob photoresist, uas tuaj yeem tswj cov kab dav qhov tseeb ntawm 1.5 μ m. Nws cov yam ntxwv tsis tshua muaj hlau ion (<0.1ppb) can avoid the impact on the electrical performance of the device, and the product yield has increased by 3 percentage points after the application of a certain 6th generation line.
2. Semiconductor ntim
DMF, ua ib qho hnyav rau epoxy molding tebchaw, ua tiav kev sib khi los ntawm kev tswj cov viscosity ntawm cov tshuaj. Hauv IC ntim, DMF raws li cov ntaub ntawv tuaj yeem txo qhov nqus dej ntawm lub pob mus rau 0.15% thiab nce qhov sib piv ntawm thermal expansion coefficient mus rau 95%.
3. Photovoltaic cell
DMF ua raws li cov tshuaj tiv thaiv hnyav hauv kev npaj ntawm perovskite hnub ci hlwb, tsim cov yeeb yaj kiab nyias nyias los ntawm kev rho tawm sai. Kev sim tau pom tias siv kev kho DMF tuaj yeem ua kom lub roj teeb hloov pauv tau los ntawm 18% mus rau 21.5%, thiab txhim kho kev ruaj ntseg los ntawm peb zaug.
DMF nthuav tawm tus nqi tshwj xeeb hauv kev tswj kev ua qias tuaj:
1. Kev kho dej khib nyiab
Ob -theem dej tsuag + tshuaj lom neeg drip filtration ua ke txheej txheem tsim rau DMF cov dej khib nyiab tuaj yeem ua tiav kev kho mob ntau dua 95%. Tom qab siv cov thev naus laus zis no hauv qee qhov chaw ua haujlwm tshuaj lom neeg, qhov concentration ntawm DMF hauv cov dej ntws ruaj khov qis dua 15mg / L, ua tau raws li qhov yuav tsum tau ua ntawm "Pollutant Discharge Standards for Synthetic Resin Industry".
2. Kev lim dej khib nyiab
Covn,n-Dimethylformamide ntshiabKev kho cov roj pov tseg tau txais kev rov ua kom rov qab los + cov txheej txheem carbon adsorption, uas tuaj yeem ua tiav cov peev txheej rov qab los ntawm 90%. Hauv kev tsim cov tawv hluavtaws, cov thev naus laus zis no tuaj yeem txo qhov concentration ntawm VOCs emissions mus rau 20mg / m ³, deb ntawm lub teb chaws txwv ntawm 80mg / m ³.
3. Kev kho av
DMF, raws li tus neeg sawv cev chelating, tuaj yeem siv rau kev kho cov hlau hnyav hauv av, nrog rau kev ruaj khov ruaj khov ntawm 10 ¹⁴ nrog Cd ² ⁺ ⁵. Cov kev tshawb fawb hauv chav kuaj pom tau hais tias ntxiv 5% DMF tuaj yeem txo cov leaching concentration ntawm Cd hauv av los ntawm 85%, ua tau raws li cov qauv kev nyab xeeb ntawm kev siv av ua liaj ua teb.
DMF muaj cov ntawv thov tseem ceeb hauv kev tshuaj xyuas thiab kev sim:
gas chromatography
DMF, raws li cov kua nyob ruaj ruaj (siv ntawm qhov kub ntawm 50 degree), tuaj yeem cais C ₂ - C ₅ hydrocarbon sib tov. Hauv kev sib cais ntawm isobutene, cov theoretical naj npawb ntawm cov tais tuaj yeem ncav cuag 3000 ib meter, thiab qhov kev sib cais tuaj yeem ncav cuag 1.8.
kua chromatography
DMF, raws li kev hloov kho cov organic siv nyob rau hauv cov theem rov qab chromatography, tuaj yeem txhim kho tus cwj pwm tuav ntawm cov polar tebchaw. Hauv kev tshuaj xyuas tshuaj tua kab mob, ntxiv 10% DMF rau lub sijhawm txawb tuaj yeem ua rau nce siab tshaj plaws symmetry los ntawm 40% thiab txo qhov kev kuaj pom rau 0.01 μ g / mL.
tsis yog -aqueous titration
DMF yog siv los ua ib qho hnyav rau kev txiav txim siab ntawm cov ntsiab lus ntawm cov organic, thiab nws cov dielectric tas li (36.7) tuaj yeem txhim kho qhov ntsuas qhov muaj peev xwm. Hauv alkaloid titration, kev siv DMF system tuaj yeem tswj qhov kawg ntawm qhov yuam kev hauv ± 0.1%.
Kev tsim kho tshiab ntawm cov khoom siv hluav taws xob tshiab
1. DMF qhia tau hais tias muaj peev xwm siv tau nyob rau hauv lub zog tshiab:
lithium -Ion roj teeb
DMF, raws li kev hloov pauv hnyav rau NMP, tuaj yeem siv rau kev npaj electrode slurry, uas tuaj yeem ua rau kom cov viscosity stability ntawm slurry los ntawm 30%. Hauv silicon-raws li cov ntaub ntawv tsis zoo electrode, DMF raws li cov ntaub ntawv tuaj yeem ua rau lub neej voj voog ntau dua 500 zaug thiab ua tiav qhov peev xwm tuav tau ntawm 85%.
2. Roj cell
DMF, raws li ib tug additive nyob rau hauv proton pauv membrane roj hlwb, tuaj yeem txhim kho kev tswj dej ntawm daim nyias nyias electrodes. Kev sim tau pom tias ntxiv 2% DMF tuaj yeem ua kom cov roj teeb tso zis ntau zog los ntawm 15% thiab kav ntev li 2 zaug.
3. Supercapacitor
DMF yog siv los ua cov kuab tshuaj electrolyte rau cov khoom siv carbon electrode, uas tuaj yeem nthuav dav lub qhov rais electrochemical mus rau 2.5V. Nyob rau hauv cov organic capacitors, DMF raws li electrolytes tuaj yeem ua kom lub zog ntom ntom rau 40Wh / kg thiab ua tiav lub neej voj voog ntawm 100000 zaug.
DMF muaj ntau yam txiaj ntsig ntawm kev siv tshuaj tua kab:
Raw khoom synthesis
Hauv kev tsim cov imidacloprid, DMF yog siv los ua cov kuab tshuaj los txhawb cov tshuaj tiv thaiv cyclization, ua rau cov khoom lag luam nce mus txog 88%. Nws cov yam ntxwv kub kub kub tuaj yeem zam qhov kub thiab txias hloov hauv cov tshuaj tiv thaiv kab mob thiab ua tiav purity ntawm 99% hauv kev sib txuas ntawm pyrethroids.
Kev npaj ua tiav
N,N{0}}Dimethylformamide ntshiab, raws li cov kuab tshuaj nyob rau hauv emulsion, yuav ua rau kom cov solubility ntawm cov tshuaj tua kab. Ntxiv 5% DMF rau avermectin emulsion tuaj yeem ua kom cov thermal cia ruaj khov ntawm cov qauv los ntawm 40%. Nws cov yam ntxwv tsis tshua muaj qhov nro (28mN / m) tuaj yeem txhim kho lub wettability ntawm cov tshuaj tov rau ntawm cov qoob loo.
Kev loj hlob ntawm cov noob txheej txheej
DMF is used as a film-forming agent for seed coating, which can form a uniform and dense protective film. Kev sim tau pom tias DMF raws li cov noob txheej txheej tuaj yeem ua rau cov noob qoob loo nce 15% thiab txhim kho cov kab mob tiv thaiv los ntawm 30%.
Cov lus nug nquag
Puas yog NN -dimethylformamide organic lossis inorganic?
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Organic compound
N, N-Dimethylformamide (DMF) yog ib qho organic sib xyaw nrog cov mis (CH3) 2NC (O) H.
N, N -Dimethylformamide siv rau dab tsi?
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DMF yog siv nyob rau hauv zus tau tej cov acrylic fibers thiab yas. Nws kuj yog siv los ua ib qho hnyav hauv peptide coupling rau kev siv tshuaj, hauv kev txhim kho thiab tsim cov tshuaj tua kab, thiab hauv kev tsim cov nplaum, hluavtaws tawv, fibers, films, thiab coatings nto.
Kev siv N, N-Dimethylformamide yog dab tsi?
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N,N-Dimethylformamide yog siv predom- inantly raws li ib tug aprotic hnyav nyob rau hauv manufac- ture ntawm polyacrylonitrile fibers, thiab tiam sis nyob rau hauv nws cov ntau lawm parallel ntawm cov polyacrylic fiber kev lag luam.
Cim npe nrov: n,n-dimethylformamide ntshiab cas 68-12-2, lwm tus neeg, manufacturers, hoobkas, lag luam wholesale, yuav, nqe, tej, kev muag khoom