Iimpawu kunye nezicelo ze-PHA

I-Polyhydroxyalkanoate (PHA), i-intracellular polyester eyenziwe ngama-microorganisms amaninzi, i-polymer biomaterial yendalo.

Ci-haracteristics ye-PHA

I-Biodegradability: I-PHA i-biodegradable ngokuzenzekelayo, ngaphandle kwe-composting, inokuthi i-biodegraded emhlabeni kunye namanzi, phantsi kweemeko ze-aerobic kunye ne-anaerobic, kwaye ixesha lokunciphisa lilawulwa, kuxhomekeke ekubunjweni kunye nobukhulu bemveliso ye-PHA kunye nezinye iimeko zangaphandle.Ngokuxhomekeke kwimo engqongileyo, izinga lokuthotywa kwe-PHA li-2 ukuya kwi-5 ngokukhawuleza kune-chemically synthesized biodegradable material polycaprolactone (PCL) okanye ezinye i-polyesters zokwenziwa kwe-aliphatic;ngelixa i-PHA esondeleyo i-polylactic acid (PLA) I-Biodegradation ayiyi kwenzeka lula ngaphantsi kwe-60 degrees Celsius.

I-biocompatibility efanelekileyo: I-PHA inokuthi ihlaziywe ibe yi-oligomers encinci ye-molecular okanye i-monomer components emzimbeni, ongeyona ityhefu kwaye engenabungozi kwizinto eziphilayo, kwaye ayiyi kubangela ukugatywa.Ngoko ke, inokuthi isetyenziswe kumathambo okwenziwa, i-additives-release agents kunye nokunye okunjalo.Ngo-2007, i-suture absorbable (i-TephaFLEX®) eyenziwe nge-P4HB yamkelwa yi-US FDA kwaye yaba yimveliso yokuqala yorhwebo ye-PHA yehlabathi.Okwangoku, ihlabathi lifunda ngokunzulu ukusetyenziswa kwe-PHA kwiinkalo ezininzi ezifana nobunjineli bezicubu, izixhobo zokufakelwa, kunye nabathwali bokukhutshwa kweziyobisi.

Ipropathi efanelekileyo edibeneyo: inokusetyenziswa ngokudibeneyo kunye nezinye izinto.Umzekelo, i-PHA inokudityaniswa nephepha ukwenza iphepha lokupakisha elineempawu ezizodwa;okanye idibaniswe nentsimbi, i-aluminium, i-tin kunye nezinye izinto zetsimbi, kwaye inokudibaniswa nomlotha wempukane ukuphucula ukusebenza kwe-thermal kunye nokuqina kwe-PHA;ukongeza, i-PHA kunye ne-calcium silicate Compounding isetyenziselwa ukunyusa izinga lokuthotywa kwe-PHA kunye nokusombulula ingxaki yexabiso eliphantsi le-pH emva kokuchithwa kwe-PHA;inokuphinda idityaniswe nezinye iiarhente zokunyanga ezingaphiliyo ukuvelisa izinto zokugquma ezinomsebenzi ongenamanzi.

Iimpawu zokuthintela igesi: I-PHA ineempawu ezilungileyo zokuthintela igesi kwaye ingasetyenziselwa ukupakishwa kokugcina ngokutsha;ukuzinza kwe-hydrolytic: i-hydrophobicity eyomeleleyo, esetyenziselwa ukuveliswa kweetafile zetafile;i-nonlinear optics: I-PHA inomsebenzi we-optical, kwaye iyunithi nganye yesakhiwo inekhabhoni ye-chiral ingasetyenziselwa uhlalutyo lwe-chromatographic ukwahlula i-isomers optical;Uzinzo lwe-UV: Xa kuthelekiswa nezinye iipolyolefins kunye neepolymers zepolyaromatic, inozinzo olungcono lwe-UV.

Isicelosye-PHA

1. Izinto zeBiomedical.I-PHA isetyenziswa ngokuqhelekileyo kwintsimi yezonyango ukwenza i-sutures yokuhlinzwa, i-staples, i-bone substitutes, i-substitutes ye-blood-substitutes, abathwali beziyobisi eziqhubekayo, iiglavu zonyango, izinto zokugqoka, iitampon, iifilimu zonyango, njl.

2. Izinto zokupakisha ze-Biodegradable kunye neemveliso zabathengi ezingenamanzi kunye nezizinzileyo ezifana neemveliso zococeko, i-diapers, izimonyo (i-exfoliating agents kwi-cosmetics, i-linings bottle linings), njl.

3. Izixhobo zombane.Ifenitshala, itafile, iiglasi, izitshixo zombane, izinto zangaphakathi zeemoto, njl.

4. Iimveliso zezolimo.I-Biodegradable carrier ye-pesticides kunye nezichumisi, ifilimu yeplastiki, njl.

5. Imidiya yeMichiza kunye nezinyibilikisi.Izicoci, idayi, izinyibilikisi zeinki, izinto zokuncamathelisa, izinto ezisebenza nge-optically.

6. Isetyenziswe njengesiseko sezinto eziphathekayo ze-thermosetting (i-polyurethane kunye ne-unsaturated polyester resins).