I-Dimethylformamide (isifinyezo se-DMF), eyaziwa nangokuthi i-N,N-dimethylformamide, ithatha indawo ye-dimethyl ye-formamide, futhi womabili amaqembu e-methyl atholakala kuma-athomu angu-N (nitrogen), ngakho-ke igama. Njengento ebalulekile yamakhemikhali eluhlaza kanye ne-solvent enhle kakhulu, i-DMF isetshenziswa kabanzi ku-polyurethane, i-acrylic, izithasiselo zokudla, imithi, izibulala-zinambuzane, odayi, i-electronics nezinye izimboni.
I-DMF iwuketshezi olungenambala nolubonisa ngale olunephuzu elibilayo eliphezulu, indawo ebandayo ephansi, amakhemikhali amahle kanye nokuzinza okushisayo, futhi ixubana namanzi nezinyibilikisi eziningi eziphilayo. Kuyi-solvent evame ukusetshenziswa ekuphenduleni kwamakhemikhali futhi ibizwa ngokuthi "i-solvent yendawo yonke": i-DMF isetshenziswa I-acrylic fiber ekhiqizwa inqubo eyomile yokuphotha ye-solvent-based acrylic fiber inezici ze-hydrophobicity enhle, amandla okumboza aqinile, ukuthungwa okuthambile, kanye nokuzwa kwesandla esinamandla; ekukhiqizeni isikhumba se-polyester esimanzi sokwenziwa, i-DMF ingasetshenziswa njenge-ejenti yokugeza nokwelapha ye-polyurethane resin. Isetshenziselwa ukumboza izinto ezihlukahlukene ezinwebekayo, futhi uma isetshenziselwa ukudaya isikhumba, ingenza umbala womfaniswano wesikhumba futhi ungabuni; ngenxa yekhono layo eliqinile lokuhlakazeka, i-DMF isetshenziswa njenge-solvent kumadayi futhi isetshenziselwa ukudaya imicu yokwenziwa, engathuthukisa ukufana kwesikhumba. Izakhiwo zokudaya; njenge-solvent ekhethiwe esetshenziswa ezinqubweni zokuhlukanisa, i-DMF ingasetshenziselwa ukumuncwa okukhethiwe kwama-hydrocarbon ahlukahlukene namagesi angaphili. Isibonelo, i-DMF isetshenziselwa ukugeza i-ethylene ukuze isuse i-acetylene, ngaleyo ndlela ihlanza i-ethylene. I-DMF ingaphinda isetshenziselwe ukukhipha i-isoprene, i-piperylene, njll. kusuka kugesi wokukhipha ukukhiqizwa kwezitshalo ze-ethylene ukuze kuhlanganiswe i-resin unsaturated; I-DMF ingasetshenziswa futhi njengesixazululi esikhethiwe sezinqubo zokukhipha emkhakheni wokucubungula i-petroleum. Isibonelo: ezinhlelweni ze-polycarboxylic acid ezinezakhiwo ezifanayo futhi okunzima ukuzihlukanisa, njenge-isophthalic acid ne-terephthalic acid, zingahlukaniswa kalula nge-DMF solvent extraction noma i-stepwise recrystallization.
Ekuphenduleni kwezinto eziphilayo, i-dimethylformamide ayisetshenziswa nje kuphela njenge-solvent yokusabela, kodwa futhi iyingxenye ebalulekile ekuhlanganiseni kwe-organic. Embonini yezemithi, njengemithi yokwenziwa emaphakathi, isetshenziswa kakhulu ekukhiqizeni izidakamizwa ze-doxycycline, i-cortisone, ne-sulfonamide; embonini yezibulala-zinambuzane, isetshenziselwa ukuhlanganisa izibulala-zinambuzane ezisebenza kahle kakhulu nezinobuthi obuphansi nezibulala-zinambuzane.
Njenge-reaction medium for chemical synthesis, i-DMF ingasetshenziswa njengesixazululi se-crystallization sokuhlanzwa kwemithi. Embonini ye-elekthronikhi, ingasetshenziswa ukulungisa i-viscosity ye-ejenti yokwelapha yama-laminates agqoke ithusi. I-DMF ingasetshenziswa futhi njengesixazululi esithwalayo ukwenza i-polymeric crystal ene-BF3 (i-boron trifluoride), okwenza i-BF3 ishintshe isuka kugesi iye esiqinile futhi kulula ukuyihambisa. Njengento encibilikayo ye-polar (i-hydrophilic) enephuzu elibilayo eliphezulu, ingaphromotha indlela ye-bimolecular nucleophilic substitution reaction (SN₂). Ngaphezu kwalokho, i-dimethylformamide inomphumela we-catalytic ku-hydrogenation, dehydrogenation, dehydration kanye ne-dehydrohalogenation reactions, okunciphisa izinga lokushisa lokuphendula futhi kuthuthukise ukuhlanzeka komkhiqizo.
Kubonakala sengathi i-DMF ifaneleka isihloko esithi "i-solvent yendawo yonke". Lokhu kuhlukahluka kokusetshenziswa kuzoba nzima ukudlula ngesikhathi esifushane.
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Isikhathi sokuthumela: May-17-2024