Cernadas Teresa, Santos Marta, Miguel Sónia P, Correia Ilídio J, Alves Patrícia, Ferreira Paula
CIEPQPF, Department of Chemical Engineering, University of Coimbra, P-3030 790 Coimbra, Portugal.
CICS-UBI, Health Sciences Research Center, University of Beira Interior, P-6200 506 Covilhã, Portugal.
Materials (Basel). 2020 Dec 12;13(24):5681. doi: 10.3390/ma13245681.
The preparation of photocrosslinkable bioadhesives synthesized from oligomers of lactic acid and polycaprolactone (PCL), both functionalized with 2-isocyanoethyl acrylate (AOI), were studied. The obtained modified macromers of LA-AOI (mLA) and PCL-AOI (mCL) were chemically characterized by H NMR and used to formulate polymeric blends with different mass proportions, 1:1, 1:2 and 2:1, respectively. Subsequently, the produced blends were crosslinked, considering two UV irradiation times: 30 and 120 s. After their production, the thermal and mechanical properties of bioadhesives were assessed, where upon the rheology, gel content, hydrolytic degradation and dynamic contact angles were determined. Furthermore, the cytotoxic profile of bioadhesives was evaluated in contact with human dermal fibroblasts cells, whereas their antibacterial effect was studied monitoring and growth. Overall, flexible and resistant films were obtained, presenting promising features to be used as surgical bioadhesives.
研究了由乳酸和聚己内酯(PCL)的低聚物合成的可光交联生物粘合剂的制备,这两种低聚物均用丙烯酸2-异氰基乙酯(AOI)进行了官能化。通过核磁共振氢谱对获得的LA-AOI(mL A)和PCL-AOI(mCL)改性大分子单体进行了化学表征,并用于分别配制质量比为1:1、1:2和2:1的聚合物共混物。随后,考虑两种紫外线照射时间:30秒和120秒,对制备的共混物进行交联。制备完成后,评估了生物粘合剂的热性能和机械性能,测定了其流变学、凝胶含量、水解降解和动态接触角。此外,评估了生物粘合剂与人皮肤成纤维细胞接触时的细胞毒性,同时通过监测细菌生长研究了其抗菌效果。总体而言,获得了柔韧性好且坚韧的薄膜,呈现出有望用作手术生物粘合剂的特性。