Ubomi buzele ziipakethe ezikhazimlayo, iibhotile zokuhombisa, izitya zeziqhamo nokunye okuninzi, kodwa uninzi lwazo zenziwe ngezinto ezinobuthi nezingenakugcinwa ixesha elide ezinegalelo kungcoliseko lweplastiki.
Kutshanje, abaphandi kwiYunivesithi yaseCambridge e-UK bafumene indlela yokwenza i-glitter ehlala ixesha elide, engenabungozi kwaye ebolayo evela kwi-cellulose, eyona nto iphambili yokwakha iindonga zeeseli zezityalo, iziqhamo kunye nemifuno. Amaphepha anxulumene nayo apapashwe kwijenali i-Nature Materials ngomhla we-11.
Yenziwe ngee-nanocrystals ze-cellulose, le glitter isebenzisa umbala wolwakhiwo ukutshintsha ukukhanya ukuvelisa imibala eqaqambileyo. Umzekelo, kwindalo, ukukhanya kwamaphiko ebhabhathane kunye neentsiba zepikoko zizinto ezintle zombala wolwakhiwo, ezingayi kunyamalala emva kwenkulungwane.
Besebenzisa iindlela zokuzihlanganisa, i-cellulose inokuvelisa iifilimu ezinemibala eqaqambileyo, batsho abaphandi. Ngokwenza ngcono isisombululo se-cellulose kunye neeparameter zokugquma, iqela lophando likwazile ukulawula ngokupheleleyo inkqubo yokuzihlanganisa, livumela ukuba izinto zenziwe ngobuninzi kwimiqulu. Inkqubo yabo iyahambelana noomatshini abakhoyo kwimizi-mveliso. Besebenzisa izixhobo ze-cellulosic ezifumaneka kurhwebo, kuthatha amanyathelo ambalwa kuphela ukuguqula ibe yi-suspension equlethe le glitter.
Emva kokuvelisa iifilimu ze-cellulose ngomlinganiselo omkhulu, abaphandi bazigaya zibe ngamasuntswana anobukhulu bawo asetyenziselwa ukwenza i-glitter okanye i-effect pigments. Ii-pellets ziyabola, azinaplastiki, kwaye azinatyhefu. Ngaphezu koko, le nkqubo ayisebenzisi amandla amaninzi kuneendlela eziqhelekileyo.
Izinto zabo zingasetyenziselwa ukuthatha indawo yeengceba zeplastiki ezikhazimlayo kunye neengceba ezincinci zeminerali ezisetyenziswa kakhulu kwizithambiso. Iingceba zemveli, ezifana neempuphu zeglitter ezisetyenziswa imihla ngemihla, zizinto ezingazinziyo kwaye zingcolisa umhlaba kunye nolwandle. Ngokubanzi, iiminerali zepigment kufuneka zifudunyezwe kubushushu obuphezulu be-800°C ukuze zenze iingceba zepigment, nto leyo engayilungelanga indalo.
Ifilimu ye-cellulose nanocrystal elungiselelwe liqela inokwenziwa ngomlinganiselo omkhulu kusetyenziswa inkqubo "yokuqengqeleka ukuze iqengqeleke", kanye njengokuba iphepha lenziwe nge-pulp yomthi, nto leyo eyenza le nto ibe yeyoshishino okokuqala.
EYurophu, ishishini lezithambiso lisebenzisa malunga neetoni ezingama-5,500 zeeplastiki ezincinci minyaka le. Umbhali ophezulu weli phepha, uNjingalwazi uSilvia Vignolini, ovela kwiSebe leKhemistri likaYusuf Hamid kwiYunivesithi yaseCambridge, uthe bakholelwa ukuba le mveliso ingayitshintsha kakhulu ishishini lezithambiso.
Ixesha lokuthumela: Novemba-22-2022