Iingcali zenzululwazi zenze inzwa engabizi kakhulu zisebenzisa itekhnoloji yePEGS enokuvavanya ukutya ubutsha kwaye inokunceda ukunciphisa inkcitho ngenxa yokulahla ukutya ngaphambi kwexesha (ukulahla ukutya ngenxa yokuba kusondele (okanye kudlulile) kumhla wokusetyenziswa, nokuba ubutsha bakho bokwenene). Izinzwa zinokudityaniswa kwipakethe yokutya okanye iithegi.
Phantse ama-30 ekhulwini ukutya ekhuselekileyo ukuba isetyenziswe ngabantu ilahlwa okanye ilahlwe nje minyaka le. Igalelo elikhulu kulo mba mkhulu ukumoshakala kokutya kungokulahlwa okwenziwa ngabathengi okanye iivenkile ezinkulu ingakumbi kumazwe aphuhlileyo. ukutya inkcitho iya iba ngumba wehlabathi kwaye ineempembelelo ezinkulu kuqoqosho kunye nokusingqongileyo.
Zonke zipakishwe ukutya ethengiswa ezivenkileni nakwiivenkile ezinkulu ineleyibhile ethi 'use by date' ebonisa umhla wokuya apho ukutya kukhuselekile kwaye kuyatyiwa ukutyiwa. Nangona kunjalo, iingcali zithi lo mhla oqhele ukushicilelwa ngumvelisi luqikelelo nje kwaye ayisosalathisi esichanekileyo sokutsha okwenyani njengeminye imiba umzekelo iimeko okugcinwa kuzo ukutya nazo zibalulekile. Ukulahla ukutya kwangaphambi kwexesha ngokwesiseko 'sokusetyenziswa ngomhla' nokuba injani na ukutsha kwayo inegalelo kwizixa ezikhulu zokumoshwa kokutya minyaka le.
Ukusetyenziswa kwezivamvo yindlela ethembisayo 'yokusetyenziswa ngomhla' komenzi njengoko ezi zivamvo zinokulandela imeko yokutya okupakishweyo okonakalayo kwaye zikudlulisele kumsebenzisi ngexesha lokwenyani. Iindidi ezininzi zetekhnoloji yoluvo ziye zayilwa; nangona kunjalo, abakadibanisi ukupakishwa kokutya okuqhelekileyo ngenxa yezizathu ezininzi ezifana nokungathembeki kwezorhwebo, iindleko eziphezulu, inkqubo yokwenziwa kwezinto ezinzima kunye nobunzima bokusebenzisa. Kwakhona, obu buchwepheshe khange buhambelane namaqonga edijithali ngoko ke idatha ayinakuqondwa ngokulula ngumsebenzisi.
Uphononongo olutsha olupapashwe ngoMeyi 8 ngo Iimpawu ze-ACS ichaza i-eco-friendly, i-eco-friendly, ixabiso eliphantsi kunye ne-flexible prototype ye-PEGS (inzwa yegesi yombane esekelwe ephepheni) ekwazi ukubona iigesi ezonakalisayo ezifana ne-ammonia kunye ne-trimethylamine ezinokunyibilika emanzini. Inzwa yenziwe ngokuprinta i-carbon electrode kwiphepha le-cellulose elifumaneka ngokulula usebenzisa ipeni yebhola kunye ne-automated cutter plotter. Iphepha leselulosi, nangona likhangeleka lomile, linemicu yeselulosi enehygroscopic equlathe ukufuma ethi ibhengezwe kumphezulu wayo ukusuka kwindawo engaphandle. Ke, iindlela zeekhemikhali ezimanzi zingasetyenziselwa ukuva iigesi ezinyibilikayo emanzini ngenxa yale propati ye-hygroscopic kwaye ngaphandle kokongezwa kwamanzi kwi-substrate. Ukuqhutywa kwephepha kunokulinganiswa ngokusebenzisa i-electrode ezimbini ze-carbon (graphite) eziprintwa kumphezulu wephepha. Ke ngoko, ifilimu encinci yeempawu zombane zamanzi inokuphononongwa ngokulula nge-conductance. Xa nayiphi na igesi enyibilikayo emanzini ikhona kwindawo engqonge ngokuthe ngqo, oku kukhokelela ekwandeni kokuhanjiswa kwe-ionic yephepha ikakhulu ngenxa yokwahlulwa kwegesi enyibilikayo emanzini kwifilim ebhityileyo yamanzi kumphezulu wephepha.
Abaphandi bavavanya itekhnoloji yePEGS ekutyeni okupakishiweyo (iimveliso zenyama - ngakumbi intlanzi kunye nenkukhu) elabhoratri ukujonga ngokobungakanani ukutsha. Iziphumo zibonise ukuba inzwa ye-PEGS ibonise ubuntununtunu obuphezulu kwiigesi ezinyibilikayo emanzini njengoko ikwazile ukukhangela ngokukhawuleza nangokuchanekileyo amanani eegesi ezonakeleyo xa kuthelekiswa nezinzwa ezikhoyo. Iigesi ezivavanyiweyo yayiyi-carbon monoxide, i-carbon dioxide, i-sulphur dioxide, i-trimethylamine kunye ne-ammonia enovakalelo oluphezulu kwi-ammonia ngenxa yokuba inyibilika kakhulu emanzini. I-PEGS ibonise ukusebenza okuphuculweyo, ixesha lokuphendula elingcono kunye novakalelo oluphezulu. Kwakhona, akukho mfuneko yokufudumeza okongeziweyo okanye ukwenziwa kwezinto ezintsonkothileyo. Ezi ziphumo zaqinisekiswa kusetyenziswa uvavanyo lwe-microbiological olusekiweyo olusebenzisa iinkcubeko zebhaktheriya. Ke ngoko, i-PEGS ifanelekile njengesalathiso sokwahluka kokutsha kokutya ngenxa yokungcoliseka kwe-microbial kwinyama epakishiweyo. Ngaphaya koko, uyilo lwesivamvo zidityanisiwe kunye nothotho lwee-microchips ezibizwa ngokuba yi-NFC (kufuphi nonxibelelwano lwentsimi) iithegi ukuze ukwazi ukuthatha ufundo kwizixhobo eziphathwayo ezikufutshane ngaphandle kwamacingo.
Isivamvo esikhethekileyo esichazwe kuphononongo lwangoku sesona sixhobo sisebenza ngokuthengisa, esingeyotyhefu, i-eco-friendly sensor esingasetyenziselwa ukuvavanya ubutsha bezinto zokutya ngokucofa ubuntununtunu bazo kwiigesi ezibandakanyekayo ekuboleni kokutya. Okubalulekileyo, ayibizi, ngeqhezu nje lexabiso leenzwa ezikhoyo. I-PEGS isebenza kakuhle kwiqondo lobushushu begumbi nakwi-100 pesenti yeemeko zokufuma ngelixa isebenzisa amandla amancinci kakhulu. Ngokutsho kwababhali i-PEGS inokufumaneka ukuba idityaniswe kwipakethe yokutya yorhwebo ngabavelisi kunye neevenkile ezinkulu kwiminyaka emi-3 ezayo. Ukusetyenziswa kwazo kunokwandiswa kwezinye iikhemikhali kunye nezonyango, ukulima kunye nezicelo zokusingqongileyo.
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{Unokufunda iphepha lokuqala lophando ngokunqakraza ikhonkco le-DOI elinikwe ngezantsi kuluhlu lwemithombo ecatshulweyo (s)}
Umthombo (s)
Barandun G et al. 2019. Iifiber ze-cellulose zivumela ukuba kufuphi ne-zero-indleko yokuva umbane kwiigesi ezinyibilikayo emanzini. Iinzwa ze-ACS. https://doi.org/10.1021/acssensors.9b00555
