"Iphoyinti elibilayo le-DMF: Ukubheka okuphelele kwezakhiwo ze-dimethylformamide
I-DimethLylformaMide (DMF) i-organic solvent esetshenziswa kabanzi kwizimboni zamakhemikhali, ezenza imithi kanye ne-elekthronikhi. Kulesi sihloko, sizoxoxa ngokuningiliziwe indawo ebilayo ye-DMF, impahla ebalulekile yenyama, futhi ihlaziye umthelela wayo ezinhlelweni ezisebenzayo.

1. Izici eziyisisekelo ze-DMF

I-DMF iwuketshezi olungenamibala onombala onombala onobuthakathaka we-ammonia. Kuyinto ye-solvent ye-polar futhi ayinakuphikwa ngamanzi futhi ama-solvents amaningi we-organic. Ngenxa ye-solubility yayo enhle kanye nephuzu elibilayo eliphakeme, i-DMF ivame ukusetshenziswa ku-syntheris yamakhemikhali, ukusabela kwe-polymerisation, ukukhiqizwa kwefilimu kanye nefilimu. Ukwazi iphuzu elibilayo le-DMF kungenye yezikhiye zokusebenzisa kahle le solvent. 2.

2. Liyini iphuzu elibilayo le-DMF?

I-DMF inendawo ebilayo engu-307 ° F (153 ° C). Leli phuzu eliphakeme eliphakeme livumela i-DMF ukuthi isetshenziswe emazingeni okushisa aphakeme ngaphandle kokushintshana, futhi ukuqina kwe-DMF BOINT PHEZULE kwenza kubelungelwe ukusabela okuningi okudinga ukushisa, okuvuthayo kwesixazululo, kanye nokusebenza okuphezulu kwezinhlelo eziphakeme zodwa. Kulezi zicelo, i-DMF ihlinzeka ngemvelo ephephile nefanele yokuphendula. 3.

3. Umthelela we-DMF ebilayo iphuzu kuhlelo lokusebenza lwayo

Iphuzu elibilayo le-DMF lithinta ngqo isicelo salo emikhakheni ehlukene. Embonini yezemithi, iphuzu elibi kakhulu lisho ukuthi i-DMF ingancibilikisa izidakamizwa ezinzima ukuxazulula izidakamizwa eziphakeme emazingeni okushisa aphezulu, ngcono ukusebenza kahle kokuhlanganiswa kwezidakamizwa. Embonini yamakhemikhali, i-DMFS ebilayo ephezulu isetshenziswa ekuphendukeni okudinga amazinga okushisa aphezulu, njengokukhiqizwa kwama-resins nama-polyamides. Le mpahla futhi yenza i-DMF ibe yi-solvent efanelekile yokuvuthwa kwamazinga okushisa okuphezulu nama-inks.
Ngakolunye uhlangothi, iphuzu elibilayo le-DMF libuye lithinta ukulamula kwalo nokulahlwa kwalo kwemvelo. Lapho kudingeka khona i-distillation ukuze uthole kabusha i-DMF, iphuzu layo elibilayo linquma ukusetshenziswa kwamandla kanye nokusebenza kahle kwenqubo yokutakula. Ngakho-ke, ezihlolweni zezimboni, hhayi kuphela izindawo zamakhemikhali ze-DMF ezidinga ukubhekwa, kepha futhi nomphumela wephuzu lokubilisa kwinqubo yokusebenza kudinga ukubhekwa.

4. Imiphumela yokushisa kumaphoyinti abilayo e-DMF

Yize iphuzu le-DMF elibilayo lingu-153 ° C ngokucindezela okujwayelekile komkhathi, izinguquko ekucindezelweni okukhona nazo zingathinta iphuzu elibilayo. Ezingcindezi eziphansi, iphuzu elibilayo le-DMF liyancipha, okuyinzuzo yezinqubo zokuhlobisa i-vacuum lapho i-solvent ilulama ingatholakala khona emazingeni okushisa aphansi anomonakalo omncane ezintweni ezibucayi zokushisa. Ukuqonda kanye nolwazi lwezinguquko eqoqweni elibilayo le-DMF ezingcindezini ezihlukile kuyingxenye ebalulekile yokwenza kahle inqubo yezimboni.

I-5. Ukuphepha kanye nokucatshangelwa kwemvelo

I-DMF ngamakhemikhali aguqukayo, futhi naphezu kwephuzu elibi eliphakeme, ukunakekelwa kufanele kuthathwe ukuvimba izingozi zokuzithandela ngesikhathi sokusebenza okushisa okuphezulu. Ukuchayeka isikhathi eside kumugqa we-DMF kungahle kube nomthelela empilweni yabantu, izinyathelo ezifanele zokuvikela ezifana nokugqoka imishini yokuvikelwa okuphefumula kanye nokuqinisekisa umoya omncane kufanele kulandele imithethonqubo eqinile yemvelo ukuvikela ukungcoliswa kwemvelo.
Ukubeka kafushane
Ukuqonda iphuzu elibilayo le-DMF nokuthi kuthinta kanjani izicelo zezimboni ulwazi olubalulekile kulabo abasebenza kwizimboni zamakhemikhali nezemithi, kanti iphuzu elibi kakhulu le-DMF ku-153 ° C likunikeza inzuzo enkulu ekusebenzeni okuphezulu kakhulu. Ukuqonda okufanele ngomthelela wamaphoyinti ama-DMF abilayo ngezinqubo kanye nezindlela zokuphepha kungasiza ekuzuzeni izinqubo, kuthuthukise ukusebenza kahle futhi kuqinisekise ukuphepha okusebenzayo. Kubalulekile ukulandela imithetho yezokuphepha nezemvelo lapho ufaka i-DMF ukuqinisekisa ukuthi izinzuzo zalo zikhuliswe. "