ArticlePolymers2026
Polymer-Dependent Morphology Development of Biodegradable Porous Microspheres with Amphiphilic PEG-PDLLA Incorporation.
Article in Polymers, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
Biodegradable porous microspheres hold considerable promise as regenerative fillers, injectable biomaterials, tissue-engineering scaffolds, and drug-delivery carriers; however, how polymer properties and amphiphilic modification jointly influence pore formation remains insufficiently understood. In this study, porous microspheres composed of poly(D,L-lactide) (PDLLA), poly(L-lactide) (PLLA), poly(ε-caprolactone) (PCL), and amphiphilic PEG-PDLLA were fabricated by a porogen-assisted solvent evaporation method, with PEG-PDLLA incorporated as an amphiphilic morphology-modifying polymer component. The relationships among polymer type and molecular weight, particle size, porogen incorporation, PEG-PDLLA incorporation, and microsphere morphology were evaluated using scanning electron microscopy, tapped-density porosity analysis, laser diffraction, Brunauer-Emmett-Teller (BET) surface area analysis, micro-computed tomography (Micro-CT), and differential scanning calorimetry (DSC). PDLLA exhibited the highest corrected density-derived porosity index (42.4%), followed by PLLA (30.9%) and PCL (13.6%). Smaller PDLLA microspheres showed higher corrected density-derived porosity, reaching 50.5% at a median particle diameter (D
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