Programa de Pós-Graduação em Engenharia de Biomateriais (PPGBiomat), Universidade Federal de Lavras (UFLA), Lavras, MG, Brazil.
Departamento de Engenharia (DEG), Universidade Federal de Lavras (UFLA), Lavras, MG, Brazil.
Int J Biol Macromol. 2018 Oct 15;118(Pt B):1817-1823. doi: 10.1016/j.ijbiomac.2018.07.027. Epub 2018 Jul 11.
Bio-based chitosan/pectin blend films were prepared by solution casting and fully characterized in terms of their viscoelastic, thermo-mechanical and water affinity properties. Dynamic light scattering and rheological analyses served as a probe that polyelectrolyte complexes were formed through COO/NH ionic cross-linking, changing the chitosan/pectin solutions from Newtonian to pseudoplastic gel-like systems. The highest degree of ionic cross-linking has been found at a specific mass ratio (chitosan/pectin 25/75) and solid-state data were obtained in detail using dynamic mechanical thermal analysis. Ionic cross-linking was determining on the physical properties of chitosan/pectin blends, which was demonstrated by the thermo-mechanical spectra, high water contact angle and tensile strength of films. The specific thermo-mechanical properties of the chitosan/pectin films can be specifically modulated according to the chitosan/pectin mass ratio to ensure successfully applications in medicine, drug delivery, agricultural and food coatings.
采用溶液浇铸法制备了基于生物的壳聚糖/果胶共混膜，并从粘弹性、热机械和水亲和力等方面对其进行了全面表征。动态光散射和流变分析表明，通过 COO/NH 离子交联形成了聚电解质复合物，使壳聚糖/果胶溶液从牛顿流体转变为假塑性凝胶状体系。在特定的质量比（壳聚糖/果胶 25/75）下，发现了最高程度的离子交联，并用动态力学热分析详细获得了固态数据。离子交联决定了壳聚糖/果胶共混物的物理性质，这可以通过热机械谱、高水接触角和薄膜的拉伸强度来证明。根据壳聚糖/果胶的质量比，可以有针对性地调节壳聚糖/果胶薄膜的特定热机械性能，以确保其在医学、药物输送、农业和食品涂层等领域的成功应用。
