Ukuhlakazwa kwezinhlayiya ze-polymer esigabeni esiwuketshezi (ama-latexes) anokusebenza okuningi okubalulekile kubuchwepheshe bokumboza, ukuthwebula izithombe kwezokwelapha, kanye nebhayoloji yamaseli.Ithimba labacwaningi baseFrance manje selisungule indlela, kubikwa kulo magaziniI-Angewandte Chemie International Edition, ukukhiqiza ama-polystyrene dispersions azinzile anosayizi wezinhlayiyana ezinkulu ngendlela engakaze ibonwe.Ukusabalalisa usayizi omncane kubalulekile kubuchwepheshe obuningi obuthuthukile, kodwa ngaphambili bekunzima ukukhiqiza nge-photochemically.
I-Polystyrene, evame ukusetshenziselwa ukwakha igwebu elinwetshiwe, nayo ifaneleka kahle ekukhiqizweni kwe-latexes, lapho izinhlayiya ze-polystyrene ezincane ezingabonakali zimisiwe.Asetshenziselwa ukwakhiwa kwama-coatings nopende futhi asetshenziselwa izinjongo zokulinganisa ku-microscope kanyeizithombe zezokwelaphakanye nocwaningo lwebhayoloji yamaseli.Ngokuvamile zikhiqizwa yi-thermal noma i-redox-inducedi-polymerizationngaphakathi kwesixazululo.
Ukuthola ukulawula kwangaphandle kwenqubo, amaqembu uMuriel Lansalot, u-Emmanuel Lacôte, no-Elodie Bourgeat-Lami e-Université Lyon 1, France, kanye nozakwabo, baphendukele ezinqubweni ezishayelwa ukukhanya."I-polymerization eqhutshwa ukukhanya iqinisekisa ukulawula kwesikhashana, ngoba i-polymerization iqhubeka kuphela lapho kukhona ukukhanya, kanti izindlela ezishisayo zingaqalwa kodwa zingayeki uma seziqhubeka," kusho uLacôte.
Nakuba sekusungulwe izinhlelo ze-UV- noma ama-photopolymerization asekelwe kukukhanya okuluhlaza okwesibhakabhaka, anemikhawulo.Imisebe ye-wavelength iDemo ihlakazeka lapho i-usayizi wezinhlayiyanaiba seduze ne-wavelength yemisebe, okwenza ama-latex anosayizi bezinhlayiyana abe mkhulu kunobude obungenayo obunzima ukukhiqiza.Ngaphezu kwalokho, ukukhanya kwe-UV kudinga amandla kakhulu, ingasaphathwa eyingozi kubantu abasebenza ngakho.
Ngakho-ke abacwaningi bakha uhlelo lokuqalwa kwamakhemikhali olulungiswe kahle olusabela ekukhanyeni okujwayelekile kwe-LED ebangeni elibonakalayo.Lolu hlelo lwe-polymerization, olusekelwe kudayi we-acridine, izinzisi, kanye nenhlanganisela ye-borane, kwaba ngeyokuqala ukunqoba "usilingi lwama-nanometer angu-300," umkhawulo wosayizi we-UV kanye ne-polymerization eqhutshwa ukukhanya okuluhlaza okwesibhakabhaka endaweni ehlakazekile.Ngenxa yalokho, ngokokuqala ngqá, leli qembu lakwazi ukusebenzisa ukukhanya ukuze kukhiqizwe i-polystyrene latexes enobukhulu bezinhlayiyana ezinkulu kune-micrometer eyodwa futhi ezinobubanzi obufana kakhulu.
Ithimba liphakamisa izicelo ngaphezu kwalokhoi-polystyrene."Lolu hlelo lungasetshenziswa kuzo zonke izindawo lapho kusetshenziswa khona ama-latex, njengamafilimu, ama-coatings, izisekelo zokuxilonga, nokunye," kusho uLacôte.Ngaphezu kwalokho, izinhlayiya ze-polymer zingashintshwa ngeodayi be-fluorescent, amaqoqo kazibuthe, noma okunye ukusebenza okusebenzisekayo ekuxilongeni nasekufanekiseni izinhlelo zokusebenza.Ithimba lithi uhla olubanzi losayizi bezinhlayiyana ezihlanganisa i-nano nezikali ezincane zingafinyeleleka “ngokumane nje kulungiswe izimo zokuqala.
Isikhathi sokuthumela: Oct-26-2023