Polymer porous ihe onwunwe bụ ihe polymer nwere ọtụtụ pores kpụrụ site gas gbasasịa n'ime ihe polymer.
Ihe owuwu porous a pụrụ iche dị ezigbo mma maka itinye ihe na-ada ụda, nkewa na mgbasa ozi, ntọhapụ ọgwụ na-adịgide adịgide, ọkpụkpụ ọkpụkpụ na ubi ndị ọzọ.
Ihe ndị nwere porous ọdịnala, dị ka polypropylene na polyurethane, adịghị mfe imebi ma were mmanụ ala dị ka ihe eji eme ihe, nke ga-ebute mmetọ gburugburu ebe obibi.
Ya mere, ndị mmadụ malitere ịmụ ihe ndị nwere ike imeghe oghere.
Ngwa nke ihe oghere oghere PLA:
Ihe oghere oghere PLA nwekwara ụfọdụ adịghị ike, nke na-amachi ngwa ya n'ọhịa nke oghere oghere, dịka:
1. Ụdị dị nro, ike nkwụsị dị ala na enweghị ike nke ihe a na-emepe emepe.
2. Ọnụego mmebi ngwa ngwa.
Ọ bụrụ na ahapụ ya n'ime ahụ ruo ogologo oge dị ka ọgwụ, ọ nwere ike ịkpata mbufụt.
3. igbapu.
Mkpakọrịta dị ala maka sel, ọ bụrụ na emebere ya ka ọ bụrụ ọkpụkpụ arụrụ arụ ma ọ bụ sel scaffold siri ike ịrapagidesi ike ma gbasaa.
Iji meziwanye adịghị ike nke ihe oghere oghere PLA, ngwakọta, ndochi, copolymerization na ụzọ ndị ọzọ ka a nakweere iji meziwanye ihe oghere oghere PLA.
Ndị a bụ ọtụtụ atụmatụ mgbanwe nke PLA:
1.PLA / PCL ngwakọta mgbanwe
PCL, ma ọ bụ polycaprolactone, bụkwa ihe na-emebi emebi nke nwere ezigbo ihe ndakọrịta ndụ, ike siri ike na ike ike.
Ijikọ na PLA nwere ike imeziwanye ike tensile siri ike nke PLA.
Ndị nchọpụta ahụ chọpụtara na enwere ike ịchịkwa ihe ndị ahụ site na ịchịkwa oke PCL na PLA. Mgbe oke nha nke PLA na PCL bụ 7: 3, ike nkwụsị na modul nke ihe ahụ dị elu.
Agbanyeghị, ike siri ike na-ebelata na mmụba nke dayameta pore.
Ihe PLA/PCL abụghị ihe na-egbu egbu ma nwee ike itinye ya na obere akwara vaskụla dayameta.
2.PLA/PBAT ngwakọta mgbanwe
PBAT bụ ihe na-emebi emebi, nke nwere mmebi nke polyester aliphatic na ike nke polyester aromatic. Enwere ike imeziwanye nkụja nke PLA ka ị jikọtara ya na PLA.
Nnyocha ahụ na-egosi na site na mmụba nke ọdịnaya PBAT, porosity nke ihe na-emeghe oghere na-ebelata (porosity bụ nke kachasị elu mgbe ọdịnaya PBAT dị 20%), na mgbaji elongation na-abawanye.
N'ụzọ na-akpali mmasị, ọ bụ ezie na mgbakwunye nke PBAT na-ebelata ike nke PLA, ike ike nke PLA ka na-abawanye mgbe a na-edozi ya n'ime oghere oghere.
3.PLA/PBS ngwakọta mgbanwe
PBS bụ ihe na-emepụta ihe na-emepụta ihe, nke nwere ihe ndị na-arụ ọrụ nke ọma, ezigbo okpomọkụ na-eguzogide, mgbanwe na ikike nhazi, ma dị nso na PP na ABS.
Ịgwakọta PBS na PLA nwere ike imeziwanye nkụja na nhazi nke PLA.
Dị ka nchọpụta ahụ si kwuo, mgbe ọnụ ọgụgụ nke PLA: PBS bụ 8: 2, mmetụta zuru oke bụ ihe kacha mma; ọ bụrụ na agbakwunyere PBS karịa, a ga-ebelata porosity nke ihe oghere oghere.
4.PLA/ BIOactive iko (BG) ndochi ndochi
Dị ka ihe iko bioactive, BG bụ nke mejupụtara silicon sodium calcium phosphorus oxide, nke nwere ike imeziwanye akụrụngwa na bioactivity nke PLA.
Site na mmụba nke ọdịnaya BG, modul tensile nke ihe oghere oghere na-abawanye, mana ike ike na elongation na nkwụsịtụ belatara.
Mgbe ọdịnaya BG bụ 10%, porosity nke oghere oghere bụ nke kachasị elu (87.3%).
Mgbe ọdịnaya BG ruru 20%, ike mkpakọ nke ihe mejupụtara bụ nke kachasị elu.
Ọzọkwa, ihe mejupụtara PLA/BG nwere ike idobe oyi akwa osteoid apatite n'elu na n'ime n'ime mmiri a na-emegharị ahụ, nke nwere ike ime ka ọkpụkpụ pụta. Ya mere, PLA/BG nwere ike itinye n'ọrụ n'ime ọkpụkpụ ọkpụkpụ.
Oge nzipu: 14-01-22