Izici kanye nezicelo ze-PHA

I-Polyhydroxyalkanoate (PHA), i-polyester ye-intracellular ehlanganiswe amagciwane amaningi, i-polymer biomaterial yemvelo.

Cukuhlukumeza kwe-PHA

I-Biodegradability: I-PHA iyabola ngokuzenzakalelayo, ngaphandle kokwenza umquba, ingavundiswa emhlabathini nasemanzini, ngaphansi kwezimo ze-aerobic ne-anaerobic, futhi isikhathi sokuwohloka siyalawuleka, kuye ngokwakheka nobukhulu bomkhiqizo we-PHA nezinye izimo zangaphandle.Ngokuya ngendawo ezungezile, izinga lokuwohloka kwe-PHA lishesha izikhathi ezi-2 kuya kwezi-5 kune-polycaprolactone (PCL) eyenziwe ngamakhemikhali noma amanye ama-polyester okwenziwa awonakele;kuyilapho i-PHA eseduze kakhulu i-polylactic acid (PLA) Ukuguqulwa kwe-Biodegradation ngeke kwenzeke kalula ngaphansi kuka-60 degrees Celsius.

I-biocompatibility enhle: I-PHA ingehliswa ibe ama-oligomers amangqamuzana amancane noma izingxenye ze-monomer emzimbeni, ezingenabo ubuthi futhi ezingenabungozi ezintweni eziphilayo, futhi ezingeke zibangele ukwenqatshwa.Ngakho-ke, ingasetshenziswa emathanjeni okwenziwa, ama-ejenti okukhululwa okuqhubekayo kwezidakamizwa nokunye okunjalo.Ngo-2007, i-suture absorbable (TephaFLEX®) eyenziwe nge-P4HB yagunyazwa yi-US FDA futhi yaba umkhiqizo wezokwelapha wokuqala we-PHA odayiswa emhlabeni.Njengamanje, umhlaba ufunda ngokujulile ukusetshenziswa kwe-PHA emikhakheni eminingi efana nobunjiniyela bezicubu, izinto zokufakelwa, kanye nabathwali abakhipha izidakamizwa.

Impahla enhle eyinhlanganisela: ingasetshenziswa ekuhlanganiseni nezinye izinto.Isibonelo, i-PHA ingahlanganiswa nephepha ukwenza iphepha lokupakisha elinezakhiwo ezikhethekile;noma ihlanganiswe nensimbi, i-aluminium, ithini nezinye izinto zensimbi, futhi ingabuye ihlanganiswe nomlotha wempukane ukuze kuthuthukiswe ukusebenza okushisayo nokuqina kwe-PHA;ngaphezu kwalokho, i-PHA ne-calcium silicate Compounding isetshenziselwa ukwandisa izinga lokuwohloka kwe-PHA nokuxazulula inkinga yenani eliphansi le-pH ngemva kokuwohloka kwe-PHA;ingabuye ihlanganiswe namanye ama-ejenti okwelapha angaphili ukuze kukhiqizwe izinto zokumboza ezinomsebenzi ongangenisi amanzi.

Izakhiwo zokuvimbela igesi: I-PHA inezinto ezinhle zokuvimbela igesi futhi ingasetshenziswa ekufakweni okusha;ukuzinza kwe-hydrolytic: i-hydrophobicity eqinile, esetshenziselwa ukukhiqizwa kwe-tableware;i-nonlinear optics: I-PHA inomsebenzi wokubona, futhi iyunithi ngayinye yesakhiwo inekhabhoni ye-chiral ingasetshenziselwa ukuhlaziya i-chromatographic ukuze kuhlukaniswe ama-isomer optical;Ukuzinza kwe-UV: Uma kuqhathaniswa namanye ama-polyolefin nama-polymers we-polyaromatic, inokuqina okungcono kwe-UV.

Isiceloskwe PHA

1. Izinto ze-Biomedical.I-PHA ivame ukusetshenziswa emkhakheni wezokwelapha ukwenza ama-sutures okuhlinzwa, ama-staples, ama-bone substitutes, esikhundleni sesitsha segazi, abathwali abakhipha izidakamizwa okuqhubekayo, amagilavu ​​ezokwelapha, izinto zokugqoka, ama-tampons, amafilimu ezokwelapha, njll.

2. Izinto zokupakisha ezibolayo kanye nemikhiqizo yabathengi engangeni manzi futhi ehlala isikhathi eside njengemikhiqizo yenhlanzeko, amanabukeni, izimonyo (ama-exfoliating agents ezimonyoni, emigqeni yamabhodlela amanzi), njll.

3. Izinto zikagesi.Ifenisha, i-tableware, izibuko, amaswishi kagesi, izinto zangaphakathi zezimoto, njll.

4. Imikhiqizo yezolimo.Umthwali we-biodegradable wezibulala-zinambuzane nomanyolo, ifilimu yepulasitiki, njll.

5. Imidiya yamakhemikhali nezincibilikisi.Izinto zokuhlanza, odayi, izincibilikisi zeyinki, izinto zokunamathisela, izinto ezisebenza ngokubonakalayo.

6. Isetshenziswa njengesisekelo sezinto zokwakha ze-thermosetting (i-polyurethane ne-unsaturated polyester resins).