I-Adsorption ukunamathela kwama-ion noma ama-molecule phezu kwesinye isigaba.I-Adsorption ingenzeka nge-physisorption kanye ne-chemisorption.Ama-ion nama-molecule angakhanga ezinhlotsheni eziningi zezindawo ezihlanganisa izindawo ze-polymer.I-polymer iyi-molecule enkulu eyakhiwe amayunithi aphindaphindayo ahlanganiswe amabhondi ahlangene.Ukukhangisa kwama-ion nama-molecule endaweni ye-polymer kudlala indima ezinhlelweni eziningi ezihlanganisa: i-biomedical, i-structural, ne-coatings.
Ama-implant Coatings
Ama-coatings amelana namaprotheni:I-adsorption yamaprotheni ithonya ukusebenzisana okwenzeka ku-interface ye-tissue-implant.Ukukhangisa kwamaprotheni kungaholela ekuhlulekeni kwegazi, ukuphendula komzimba wangaphandle futhi ekugcineni ukonakala kwedivayisi.Ukuze ulwe nemiphumela yokukhangisa kwamaprotheni, izimila zivame ukumbozwa nge-polymer coating ukuze kwehliswe ukukhangiswa kwamaprotheni.
Izembatho ze-Polyethylene glycol (PEG) zikhonjiswe ukunciphisa ukukhangiswa kwamaprotheni emzimbeni.I-PEG coating iqukethe ama-molecule e-hydrophilic anyanyeka ekukhangiseni kwamaprotheni.Amaprotheni aqukethe ama-molecule e-hydrophobic futhi ashaja amasayithi afuna ukubopha kwamanye ama-molecule e-hydrophobic kanye nezindawo ezishajwa ngokuphambene.Ngokusebenzisa i-PEG ye-monolayer encane, ukukhangisa kwamaprotheni kuyavinjelwa endaweni yedivayisi.Ngaphezu kwalokho, ukumelana kwedivayisi ku-protein adsorption, ukunamathela kwe-fibroblast kanye nokunamathela kwamagciwane kuyakhula.
I-Antithrombogenic coatings:I-hemocompatability yedivayisi yezokwelapha incike eshadini elingaphezulu, amandla kanye ne-topography.Amadivayisi ahlulekayo ukuba yi-hemocompatabile afaka engcupheni yokwenza i-thrombus, ukwanda kanye nokufaka amasosha omzimba engozini.Izembatho ze-polymer zisetshenziswa kumadivayisi ukukhulisa i-hemocompatability yabo.I-Cascades yamakhemikhali iholela ekwakhekeni kwamahlule e-fibrous.Ngokukhetha ukusebenzisa i-hydrophilic polymer coatings, i-protein adsorption iyancipha futhi nethuba lokusebenzelana okungalungile negazi liyancipha futhi.Enye yezinto ezinjalo ze-polymer engeza i-hemocompatability yi-heparin.I-Heparin iyi-polymer coating exhumana ne-thrombin ukuvimbela ukuhlangana.I-Heparin ikhonjiswe ukuthi icindezela ukunamathela kweplatelet, ihambisana nokusebenza kanye ne-protein adsorption.
Okwesakhiwo
Izinhlanganisela ze-polymer ezithuthukisiwe:Izinhlanganisela ze-polymer ezithuthukisiwe zisetshenziswa ekuqiniseni nasekuvuseleleni izakhiwo ezindala.Lezi zinhlanganisela ezithuthukisiwe zingenziwa kusetshenziswa izindlela eziningi ezihlukene ezihlanganisa i-prepreg, i-resin, ukumnika, i-filament winding kanye ne-pultrusion.Izinhlanganisela ze-polymer ezithuthukisiwe zisetshenziswa ezakhiweni eziningi zendiza futhi imakethe yazo enkulu kunazo zonke isendaweni yendiza nokuzivikela.
I-fiber reinforced polymers:Ama-polymers aqiniswe nge-Fiber (FRP) avame ukusetshenziswa ngonjiniyela bezakhiwo ezakhiweni zabo.Ama-FRP aphendula ngomugqa-elastically ekucindezelekeni kwe-axial, okuwenza abe yinto enhle yokubamba umthwalo.Ama-FRP ajwayele ukwakheka kwe-laminate ne-lamina ngayinye enemicu engaqondile, ngokuvamile ikhabhoni noma ingilazi, eshumekwe ngaphakathi kongqimba lwe-matrix ye-polymer ekhanyayo.Ama-FRP anokumelana okukhulu nokuchayeka kwemvelo kanye nokuqina okukhulu.
I-Polytetrafluoroethylene:I-Polytetrafluoroethylene (I-PTFE) iyi-polymer esetshenziswa ezinhlelweni eziningi ezihlanganisa ukunamathela okunganamathi, imikhiqizo yobuhle, nezinto zokugcoba.I-PTFE iyi-molecule ye-hydrophobic eyakhiwe nge-carbon ne-fluorine.Amabhondi e-Carbon-fluorine abangela i-PTFE ukuthi ibe into ebambene kancane, ekwazi ukumelana nezinga lokushisa eliphezulu futhi imelane nokuqhekeka kwengcindezi.Lezi zici zenza i-PTFE ingasebenzi futhi isetshenziswe kuhlelo olubanzi lwezinhlelo zokusebenza.
I-polymer adsorption kumidiya enezimbotshana:I-adsorption ebonakalayo kanye ne-mechanical entrapment yizimbangela ezimbili ezinkulu zokugcinwa kwe-polymer emithonjeni ye-porous.Ukugcinwa kwe-polymer ephansi echibini kubalulekile empumelelweni yokusebenza kwe-polymer EOR.
Isikhathi sokuthumela: Dec-18-2018