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![Figure 1.3. Mechanism of UV-induced grafting of a PES membrane [13].](profile/Haofei-Guo/publication/48548912/figure/fig3/AS:669452496535568@1536621321813/Mechanism-of-UV-induced-grafting-of-a-PES-membrane-13_Q320.jpg)
Entrapment technique, served as one kind of polymer surface functionalization strategies, has been developed in recent decades. All previous studies focused on polar polymer surface modification. In this thesis, aiming to polymer surface hydrophilic and antifouling modification, a variety of (macro)molecules have been applied to entrap into polar p...
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Citations
... This approach involves inducing polymer swelling with a modifying mixture made of a swelling agent [24] or a diluted solvent [25] with a dissolved modifying molecule. On the collapse of the swollen layer, the modifying molecule is trapped as a penetrating network at the surface of the polymer structure [26][27][28]. Electron beam irradiation and plasma induced polymerisation were reported to functionalise the surface with a minor effect on surface topography [29][30][31][32][33][34][35][36][37]. ...
Statement of significance:
Poly (DL lactic-co-glycolic) acid (PDLLGA) microspheres offer limited functional groups on their surface to enable proper grafting of tissue specific bioactive molecules. To overcome this limitation, previous approaches have suggested using alkaline solutions to introduce active groups to the surface; however, they may compromise surface topography and lose any potential surface patterns. Plasma polymerisation of bioactive monomers has been suggested to enhance surface biocompatibility; however, it is not applicable on low vapour pressure macromolecules such as most extracellular matrix (ECM) proteins and growth factors. This study aims to evaluate three different approaches to modify the surface of PDLLGA microspheres with gelatine-methacrylate (gel-MA) to enable further grafting of cross-linkable biomolecules without compromising the surface topography or the biocompatibility of the system.
