“Indawo yokuBilisa yeDMF: Ujongo oluBanzi kwiiPropati zeDimethylformamide
I-Dimethylformamide (i-DMF) yi-solvent ye-organic esetyenziswa ngokubanzi kumashishini amachiza, amayeza kunye ne-electronics. Kweli nqaku, siza kuxubusha ngokweenkcukacha indawo yokubilisa ye-DMF, ipropati engundoqo yomzimba, kwaye sihlalutye impembelelo yayo kwizicelo eziphathekayo.

1. Iimpawu ezisisiseko zeDMF

I-DMF lulwelo olungenambala olucacileyo olunevumba elibuthathaka le-ammonia. Yinto enyibilikayo kwincam yomhlaba kwaye ixubene namanzi kunye nezona zinyibilikisi zininzi. Ngenxa yokunyibilika kwayo okulungileyo kunye neqondo eliphezulu lokubilisa, i-DMF iqhele ukusetyenziswa kwi-chemical synthesis, i-polymerisation reactions, i-fiber kunye nokuveliswa kwefilimu. Ukwazi indawo yokubilisa ye-DMF yenye yezitshixo zokusetyenziswa ngokufanelekileyo kwesi sinyibilikisi. 2.

2. Yintoni iqondo lokubilisa le-DMF?

I-DMF ineqondo lokubila elingu-307°F (153°C). Eli nqanaba eliphezulu lokubilisa livumela i-DMF ukuba isetyenziswe kumaqondo obushushu aphakamileyo ngaphandle kokuguquguquka, kwaye ukuzinza kwendawo yokubilisa ye-DMF kuyenza ilungele ukusabela okuninzi okudinga ukushisa, okufana ne-polymerisation yobushushu obuphezulu, i-evaporation yesisombululo, kunye neenkqubo eziphezulu zokunyibilikisa. Kwezi zicelo, iDMF ibonelela ngendawo yokusabela ekhuselekileyo nesebenzayo. 3.

3. Impembelelo yendawo yokubilisa yeDMF kwisicelo sayo

Indawo yokubilisa ye-DMF ichaphazela ngqo ukusetyenziswa kwayo kumashishini ahlukeneyo. Kwishishini lamachiza, indawo yokubilisa ephezulu ithetha ukuba i-DMF inokunyibilikisa amayeza anzima ukusonjululwa kumaqondo obushushu aphezulu, iphucula ukusebenza kakuhle kokwenziwa kweziyobisi. Kwishishini lemichiza, i-DMF ephezulu yokubilisa isetyenziselwa ukuphendula okudinga ukushisa okuphezulu, njengokuveliswa kwee-resin kunye ne-polyamides. Le propati yenza i-DMF ibe sisinyibilikisi esifanelekileyo sokugquma ubushushu obuphezulu kunye nee-inki.
Ngakolunye uhlangothi, indawo yokubilisa ye-DMF iphinda ichaphazele ukubuyiswa kwayo kunye nokulahlwa kobume bendalo. Apho i-distillation ifunekayo ukubuyisela i-DMF, indawo yayo yokubilisa imisela ukusetyenziswa kwamandla kunye nokusebenza kakuhle kwenkqubo yokubuyisela. Ngoko ke, kwizicelo zoshishino, kungekhona kuphela iipropati zeekhemikhali ze-DMF kufuneka ziqwalaselwe, kodwa kunye nomphumo wendawo yokubilisa kwinkqubo yokusebenza kufuneka ithathelwe ingqalelo.

4. Iimpembelelo zoBubushushu kwiiNqaku zokuBilisa zeDMF

Nangona indawo yokubilisa ye-DMF iyi-153 ° C kuxinzelelo oluqhelekileyo lwe-atmospheric, utshintsho kuxinzelelo lwe-ambient lunokuchaphazela indawo yokubilisa. Kwiingcinezelo ezisezantsi, indawo yokubilisa ye-DMF iyancipha, eyinzuzo kwiinkqubo ze-vacuum distillation apho ukubuyiswa kwe-solvent kunokufezekiswa kumaqondo okushisa aphantsi kunye nomonakalo omncinci kwizinto ezinobushushu. Ukuqonda kunye nolwazi lotshintsho kwindawo yokubilisa ye-DMF kwiingcinezelo ezahlukeneyo yinxalenye ebalulekileyo yokuphucula inkqubo yoshishino.

5. Iingqwalasela zokhuseleko kunye nokusingqongileyo

I-DMF yikhemikhali eguquguqukayo, kwaye ngaphandle kokubilisa kwayo okuphezulu, kufuneka kuthathelwe ingqalelo ukuthintela iingozi zokuguquguquka ngexesha lokusebenza kobushushu obuphezulu. Ukubonakaliswa kwexesha elide kumphunga we-DMF kunokuba nempembelelo kwimpilo yabantu, ngoko ke amanyathelo afanelekileyo okukhusela afana nokunxiba izixhobo zokukhusela ukuphefumla kunye nokuqinisekisa ukuba umoya olungileyo kufuneka uthathwe ngexesha lenkqubo, kunye nokulahlwa kolwelo lwenkunkuma ye-DMF kufuneka kwakhona kulandele imigaqo engqongqo yokusingqongileyo ukuthintela ukungcoliseka kwendalo.
Isishwankathelo
Ukuqonda indawo yokubilisa ye-DMF kunye nendlela echaphazela ngayo izicelo zoshishino lulwazi olubalulekileyo kulabo basebenza kwiikhemikhali kunye namashishini amayeza, kwaye indawo yokubilisa ephezulu ye-DMF kwi-153 ° C inika inzuzo enkulu kwimisebenzi yokushisa ephezulu. Ukuqonda okufanelekileyo kwempembelelo yamanqaku okubilisa kwe-DMF kwiinkqubo kunye namanyathelo okhuseleko kunokunceda ukwandisa iinkqubo, ukuphucula ukusebenza kakuhle kunye nokuqinisekisa ukhuseleko lokusebenza. Kubalulekile ukulandela ukhuseleko kunye nemithetho yokusingqongileyo xa usebenzisa iDMF ukuqinisekisa ukuba izibonelelo zayo zongezelelekileyo. ”