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. 2023 Aug 23;16(17):5758.
doi: 10.3390/ma16175758.

Effect of Polydopamine and Curcumin on Physicochemical and Mechanical Properties of Polymeric Blends

Muhammad Tahir  1 , Alina Sionkowska  1
Affiliations

Effect of Polydopamine and Curcumin on Physicochemical and Mechanical Properties of Polymeric Blends

Muhammad Tahir et al. Materials (Basel). .

Abstract

In this study, we prepared composites made from polyvinyl alcohol (PVA), sodium alginate (SA), curcumin (Cur), and polydopamine (PD). The film-forming properties of the composites were researched for potential wound-healing applications. The structures of the polymer blends and composites were studied by FTIR spectroscopy and microscopic observations (AFM and SEM). The mechanical properties were measured using a Zwick Roell testing machine. It was observed that the formation of a polymeric film based on the blend of polyvinyl alcohol and sodium alginate led to the generation of pores. The presence of curcumin in the composite resulted in the alteration of the blend properties. After solvent evaporation, the polymeric blend of PVA, SA, and curcumin formed a stable polymeric film, but the film showed poor mechanical properties. The addition of polydopamine led to an improvement in the mechanical strength of the film and an increase in its surface roughness. A polymeric film of sodium alginate presented the highest surface roughness value among all the studied specimens (66.6 nm), whereas polyvinyl alcohol showed the lowest value (1.60 nm). The roughness of the composites made of PVA/SA/Cur and PVA/SA/Cur/PD showed a value of about 25 nm. Sodium alginate showed the highest values of Young's modulus (4.10 GPa), stress (32.73 N), and tensile strength (98.48 MPa). The addition of PD to PVA/SA/Cur led to an improvement in the mechanical properties. Improved mechanical properties and appropriate surface roughness may suggest that prepared blends can be used for the preparation of wound-healing materials.

Keywords: curcumin; polydopamine; polymeric composite; polyvinyl alcohol; sodium alginate.

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Conflict of interest statement

The authors declare no conflict of interest.

Figures

Figure 1
Figure 1
Microscopic images of films: (a) SA; (b) PVA; (c) PVA/SA; (d) PVA/SA/Cur; (e) PVA/SA/Cur/PD.
Figure 2
Figure 2
AFM images of (a)SA; (b)PVA; (c)PVA/SA; (d) PVA/SA/Cur; (e)PVA/SA/Cur/PD.
Figure 3
Figure 3
SEM images of films: (a) SA; (b) PVA; (c) PVA/SA; (d) PVA/SA/Cur; (e) PVA/SA/Cur/PD.
Figure 4
Figure 4
FTIR spectra of curcumin powder and polymeric blends.
Figure 5
Figure 5
Young’s modulus of polymers and polymer blends and composites.
Figure 6
Figure 6
Elongation at break of polymers and polymer blends and composites.
Figure 7
Figure 7
Stress of polymers and polymer blends and composites.
Figure 8
Figure 8
Tensile strength of polymers and polymer blends and composites.
See this image and copyright information in PMC

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