"Indawo yokubilisa ye-DMF: Ukubheka Okubanzi Kwezakhiwo ze-Dimethylformamide
I-Dimethylformamide (DMF) i-solvent ephilayo esetshenziswa kakhulu ezimbonini zamakhemikhali, ezekhemisi neze-electronics. Kulesi sihloko, sizoxoxa ngokuningiliziwe ngephuzu lokubilisa le-DMF, impahla ebonakalayo ebalulekile, futhi sihlaziye umthelela wayo ekusetshenzisweni okungokoqobo.

1. Izakhiwo eziyisisekelo ze-DMF

I-DMF iwuketshezi olungenambala olusobala olunephunga elibuthakathaka le-ammonia. Kuyi-solvent ye-polar futhi ixubana namanzi kanye nezincibilikisi eziningi eziphilayo. Ngenxa yokuncibilika kwayo okuhle kanye nephuzu elibilayo eliphezulu, i-DMF ijwayele ukusetshenziswa ekuhlanganiseni kwamakhemikhali, ukusabela kwe-polymerisation, i-fiber kanye nokukhiqizwa kwefilimu. Ukwazi indawo yokubilisa ye-DMF kungenye yezihluthulelo zokusebenzisa kahle lesi sincibilikisi. 2.

2. Liyini iphuzu lokubilisa le-DMF?

I-DMF inephuzu lokubilisa elingu-307°F (153°C). Leli phuzu lokubilisa eliphakeme uma kuqhathaniswa livumela i-DMF ukuthi isetshenziswe emazingeni okushisa aphakeme ngaphandle kokuguquguquka, futhi ukuzinza kwendawo yokubilisa ye-DMF kuyenza ifaneleke ukusabela okuningi okudinga ukushisa, okufana ne-high-temperature polymerisation, ukuhwamuka kwesixazululo, kanye nezinhlelo zokuncibilikisa ezisebenza kahle kakhulu. Kulezi zinhlelo zokusebenza, i-DMF ihlinzeka ngendawo yokusabela ephephile nephumelelayo. 3.

3. Umthelela wendawo yokubilisa ye-DMF ekusetshenzisweni kwayo

Iphuzu lokubilisa le-DMF lithinta ngqo ukusetshenziswa kwalo ezimbonini ezahlukene. Embonini yezemithi, indawo yokubilisa ephezulu isho ukuthi i-DMF ingancibilikisa izidakamizwa okunzima ukuzixazulula emazingeni okushisa aphezulu, ithuthukise ukusebenza kahle kokuhlanganiswa kwezidakamizwa. Embonini yamakhemikhali, amaphuzu aphezulu abilayo e-DMF asetshenziswa ekuphenduleni okudinga ukushisa okuphezulu, njengokukhiqizwa kwama-resin nama-polyamides. Lesi sakhiwo futhi senza i-DMF ibe yi-solvent efanelekile yezingubo zokushisa eziphezulu noyinki.
Ngakolunye uhlangothi, indawo yokubilisa ye-DMF iphinde ithinte ukubuyiselwa kwayo kanye nokulahlwa kobungani bemvelo. Lapho i-distillation idingeka ukuze kubuyiselwe i-DMF, iphoyinti layo lokubilisa linquma ukusetshenziswa kwamandla nokusebenza kahle kwenqubo yokubuyisela. Ngakho-ke, ekusetshenzisweni kwezimboni, akuzona kuphela izakhiwo zamakhemikhali ze-DMF ezidinga ukucatshangelwa, kodwa futhi umphumela wephuzu lokubilisa ohlelweni lokusebenza udinga ukucatshangelwa.

4. Imiphumela Yezinga Lokushisa Kumaphoyinti Okubilisa e-DMF

Nakuba iphoyinti lokubilisa le-DMF lingu-153°C ekucindezelweni okujwayelekile komkhathi, izinguquko kungcindezi ye-ambient zingaphazamisa nendawo yokubilisa. Ngezingcindezi eziphansi, indawo yokubilisa ye-DMF iyancipha, okuyinzuzo yezinqubo ze-vacuum distillation lapho ukutholakala kwe-solvent kungafinyelelwa emazingeni okushisa aphansi ngomonakalo omncane ezintweni ezizwela ukushisa. Ukuqonda kanye nolwazi lwezinguquko endaweni yokubilisa ye-DMF ezingcindezini ezahlukene kuyingxenye ebalulekile yokuthuthukisa inqubo yezimboni.

5. Ukucatshangelwa kokuphepha kanye nemvelo

I-DMF iyikhemikhali eguquguqukayo, futhi naphezu kokubilisa kwayo okuphezulu, ukunakekelwa kufanele kuthathwe ukuze kuvinjelwe izingozi zokuguquguquka ngesikhathi sokusebenza kwezinga lokushisa eliphezulu. Ukuchayeka isikhathi eside kumhwamuko we-DMF kungase kube nomthelela empilweni yomuntu, ngakho-ke izinyathelo ezifanele zokuvikela ezinjengokugqoka izinto zokuvikela ukuphefumula kanye nokuqinisekisa ukuthi kungena umoya omuhle ngesikhathi senqubo, futhi ukulahlwa koketshezi lwemfucuza ye-DMF kufanele futhi kulandele imithetho eqinile yezemvelo ukuvimbela ukungcoliswa kwemvelo.
Isifinyezo
Ukuqonda indawo yokubilisa ye-DMF nokuthi izithinta kanjani izinhlelo zokusebenza zezimboni kuwulwazi olubalulekile kulabo abasebenza ezimbonini zamakhemikhali nezemithi, futhi indawo yokubilisa ephezulu ye-DMF ku-153°C ikunikeza inzuzo ephawulekayo ekusebenzeni kwezinga lokushisa eliphezulu. Ukuqonda kahle umthelela wamaphuzu abilayo e-DMF ezinqubweni nasezinyathelweni zokuphepha kungasiza ekuthuthukiseni izinqubo, kuthuthukiswe ukusebenza kahle nokuqinisekisa ukuphepha kokusebenza. Kubalulekile ukulandela imithetho yokuphepha kanye nemvelo lapho usebenzisa i-DMF ukuze kuqinisekiswe ukuthi izinzuzo zayo ziba nkulu.”