II.Yintoni i-biodegradable ice cream iphepha indebe
I-Biodegradableiikomityi zephepha le-ayisikrimubabe nokuthotywa.Inciphisa umthwalo kokusingqongileyo.Inokunciphisa inkunkuma yobutyebi ngokubola kwe-microbial kunye nokurisayikilisha.Le ndebe yephepha lukhetho oluzinzileyo nolunobuhlobo nokusingqongileyo.Ibonelela ngesisombululo esizinzileyo kushishino lokutya.
A. Inkcazo kunye neempawu
Iikomityi zephepha ze-ayisikrimu ezibolisiweyo zizikhongozeli zephepha ezenziwe ngezinto ezinokubola.Ifumana inkqubo yokuthotywa kwendalo kwindawo efanelekileyo.Xa kuthelekiswa neekomityi zeplastiki zemveli, iikomityi zephepha ezibolisiweyo zinezi mpawu zilandelayo:
1. Ukhuseleko lokusingqongileyo.I-PLA iyanciphaiikomityi ze-ayisikrimuzenziwe ngestatshi sesityalo.Ngaloo ndlela, inokubola kwindawo yendalo.Oku kunokunciphisa ukungcoliseka kwendalo.Inefuthe elihle ekukhuseleni imo engqongileyo yoMhlaba.
2. Ukuhlaziywa.I-PLA yenziwe ngezixhobo ezivuselelekayo, ezifana nesitatshi sesityalo.Xa kuthelekiswa neeplastiki zepetrochemical, inkqubo yokuvelisa ye-PLA inokusetyenziswa kwamandla aphantsi kunye nokukhutshwa kwegesi eluhlaza.Inozinzo olungcono.
3. Ukungafihli.Iikomityi zephepha ze-PLA zinokucaca kakuhle.Oku kunokubonisa ngokucacileyo umbala kunye nokubonakala kwe-ayisikrimu.Inokuphucula ukonwabela imbonakalo yabathengi.Ngaphandle koko, iikomityi zephepha zinokwenziwa ngokwezifiso kwaye zenziwe ngokwezifiso.Oku kubonelela abarhwebi ngamathuba amaninzi okuthengisa.
4. Ukumelana nobushushu.Iikomityi zephepha ze-PLA zisebenza kakuhle.Iyakwazi ukumelana nokutya kubushushu obuthile.Le komityi yephepha ifaneleke kakhulu ukubamba ukutya okubandayo nokushushu okufana ne-ayisikrimu.
5. Ikhaphukhaphu kwaye yomelele.Iikomityi zephepha ze-PLA zikhaphukhaphu kwaye kulula ukuzithwala kunye nokusetyenziswa.Okwangoku, iikomityi zephepha ze-PLA zenziwe ngenkqubo ekhethekileyo yokwenza indebe yephepha.Oku kwenza ukuba ulwakhiwo lwayo lomelele ngakumbi kwaye lungabikho lula kwi-deformation kunye nokwaphuka.
6. Izatifikethi zamazwe ngamazwe.Iikomityi zephepha zePLA zithobela imigangatho efanelekileyo yezatifiketi zokusingqongileyo.Ngokomzekelo, umgangatho we-European EN13432 biodegradation standard kunye ne-American ASTM D6400 umgangatho wokuhlaziywa kwezinto eziphilayo.Inesiqinisekiso somgangatho ophezulu.
B. Inkqubo yeBiodegradation yeekomityi zephepha ezonakeleyo
Xa iikomityi ze-ice cream ezonakeleyo ze-PLA zilahlwa, oku kulandelayo ngamanqaku aneenkcukacha zenkqubo yazo yokuthotywa:
Izinto eziphambili ezenza ukuba iikomityi zephepha le-PLA zibole kwiindawo zendalo zinomswakama kunye nobushushu.Ngomswakama ophakathi kunye nobushushu, indebe yephepha iya kuqalisa inkqubo yokubola.
Uhlobo lokuqala luyi-hydrolysis.Iindebe yephephaiqala inkqubo ye-hydrolysis phantsi kweempembelelo zokufuma.Ubumanzi kunye ne-microorganisms zingena kwi-micropores kunye nokuqhekeka kwikomityi yephepha kunye nokusebenzisana nama-molecule e-PLA, okukhokelela ekuphenduleni kokubola.
Uhlobo lwesibini luyi-enzymatic hydrolysis.Ii-Enzymes zii-catalysts ze-biochemical ezinokukhawulezisa ukusabela kokubola.Ii-Enzymes ezikhoyo kwimekobume zinokwenza i-hydrolysis yeekomityi zephepha ze-PLA.Iqhekeza iipolima zePLA zibe ziimolekyuli ezincinci.Ezi molekyuli zincinci ziya kunyibilika ngokuthe ngcembe kwindawo engqongileyo kwaye zibole ngakumbi.
Uhlobo lwesithathu kukubola kwe-microbial.Iikomityi zephepha ze-PLA ziyakwazi ukubola ngenxa yokuba zininzi ii-microorganisms ezinokubola i-PLA.Ezi microorganisms ziya kusebenzisa i-PLA njengamandla kwaye zithobe zibe yi-carbon dioxide, amanzi, kunye ne-biomass ngokubola kunye neenkqubo zokubola.
Izinga lokuthotywa kweekomityi zephepha le-PLA lixhomekeke kwizinto ezininzi.Okufana nokufuma, ubushushu, iimeko zomhlaba, kunye nobukhulu kunye nobukhulu beekomityi zephepha.
Ngokuqhelekileyo, iikomityi zephepha ze-PLA zifuna ixesha elide ukuze zithobe ngokupheleleyo.Inkqubo yokuthotywa kweekomityi zephepha ze-PLA ngokuqhelekileyo zenzeke kwiindawo zokubumba umgquba kwimizi-mveliso okanye iindawo ezifanelekileyo zendalo.Phakathi kwazo, iimeko zibangela ukufuma, ubushushu, kunye nokusebenza kweentsholongwane.Kwiindawo zokulahla inkunkuma ezindlini okanye kwiindawo ezingafanelekanga, izinga lokuthotywa kwayo lisenokucotha.Ngaloo ndlela, xa uphatha iikomityi zephepha le-PLA, kufuneka kuqinisekiswe ukuba zifakwe kwinkqubo yonyango efanelekileyo yenkunkuma.Oku kunokubonelela ngeemeko ezifanelekileyo zokuthotywa.