Spectrophotometric analysis of surface free energies of polymer surfaces

  • Authors

    • C.P. Odeh Nnamdi Azikiwe University, Awka
    • O. N.Ezenwa Nnamdi Azikiwe University, Awka
    • A. E. Chinweze Nnamdi Azikiwe University, Awka
    • A. A. Okafor Nnamdi Azikiwe University, Awka
    2024-02-07
    https://doi.org/10.14419/4nks4e77

  • This work is focused on the use of a spectrophotometer to determine the surface free energies of polymers. To study the molecular system interaction, there is a need for a simpler method to calculate free energy. The free energy determines the phase interaction of polymer film at different concentrations. One of the simpler methods is the use of a spectrophotometer. The methodology involved taking four polymer samples and dissolving each into different concentrations for absorbance measurement using an ultraviolet spectrophotometer. From the absorbance data, various variables (e.g., dielectric constant, etc.) were derived. This variable (dielectric constant) was also used to determine the haymaker constant of each concentration of each polymer. The surface free energies are determined from the values of the Hamaker constant. The peak values of surface free energies for Polyvinyl alcohol (PVA), Polyethylene glycol (PEG) and Polyacrylamide (PAM) were also obtained from spectrophotometer results and found to be the same, 57.51mJ/m^2. Contact angle measurements on concentration were also obtained. It was found that the contact angle measured on PVA and PEG at different concentrations tends to decrease with an increase in concentration. The results, therefore, show that PVA and PEG surfaces tend to be hydrophilic as concentration increases while PAM and Polyvinyl acetate (PVAC indicate hydrophobic. Surface free energies obtained from the spectrophotometric result and contact angle show little significant difference of about 6.9% and they followed the trend when related with other surface properties.

     

  • References

    1. Abu-Lail, N. I., Camesano,T. A. Specific and Nonspecific Interaction Forces Between Escherichia coli and Silicon Nitride, Determined by Poisson Statistical Analysis. Langmuir 22 (2006) 7296-7301. https://doi.org/10.1021/la0533415.
    2. Achebe, C.H., (2010). Human Immunodefficiency Virus (HIV)-Blood Interactions: Surface Thermodynamics Approach, PhD. Disser-tation, Nnamdi Azikiwe University, Awka, Nigeria
    3. Atkins, Peter and Julio de Paula. Physical Chemistry for the Life Sciences. New York: Oxford University Press, 2006.
    4. Benitez, E., Lerma,T., Córdoba, A. Making of porous ionic surfaces by sequential polymerization: polyurethanes + grafting of poly-electrolytes. J. Sci. Technol. Appl., 2 (2017) 44-53. https://doi.org/10.34294/j.jsta.17.2.13.
    5. BOUHANK, S., NEKKAA, S., HADDAOUI, N., 2016. Water absorption, biodegradation, thermal and morphological properties of Spartium junceum fiber-reinforced polyvinylchloride composites: Effects of fibers content and surface modification. J. Adhes. Sci. Technol. 30, 13, 1-17. https://doi.org/10.1080/01694243.2016.1150118.
    6. Brandrup, J., Immergut, E. H., and Grulke Eds, E. A. Polymer Handbook, 4th Ed, wiley Interscience, New York 1999.
    7. Chen, J., Shen, L., Zhang, M., Hong, H., He, Y., Liao, B., Lin. H. Thermodynamic analysis of effects of contact angle on interfacial in-teractions and its implications for membrane fouling control. Biores. Techno. 201 (2016) 245-252. https://doi.org/10.1016/j.biortech.2015.11.063.
    8. Deshmukh, R. R., Bhat, N. V., Mat Res Innovat, 2003, 7, 283–290. https://doi.org/10.1007/s10019-003-0265-z.
    9. HARDING, R.H., 1997. The role of adhesion in the mechanical properties of filled polymer composites. J. Adhes. Sci. Technol. 11, 471-493. https://doi.org/10.1163/156856197X00039.
    10. KLEPKA, T., JEZIÓRSKA, R., SZADKOWSKA, A., 2015. Thin wall products made of modified high-density polyethylene, Przem. Chem. 94, 1352-1355.
    11. Lerma,T., Collazos, S., Córdoba, A. Effect of side chain lenth of carbamates on the surface properties of porous interpenetrating net-works. J. Sci. Technol. Appl. 1 (2016) 30-38. https://doi.org/10.34294/j.jsta.16.1.3.
    12. Liu,Y., Zhao,Q. Influence of surface energy of modified surfaces on bacterial adhesion. Biophys. Chem. 117 (2005) 39 - 45. https://doi.org/10.1016/j.bpc.2005.04.015.
    13. Long, J., Chen, P. On the role of energy barriers in determining contact angle hysteresis. Adv. Colloid Interf. Sci. 127 (2006) 55-66. https://doi.org/10.1016/j.cis.2006.09.001.
    14. O. I. Ani, S. N. Omenyi, S. C. Nwigbo, (2015). Surface Free Energies of Some Antiretroviral Drugs from Spectrophotometric Data and Possible Application to HIV-Infected Lymphocytes. International Journal of Scientific & Technology Research. 4(12) ISSN 2277-8616
    15. Omenyi, S.N., (2005). The Concept of Negative Hamaker Coefficients: Nnamdi Azikiwe University, Awka, Inaugural Lecture Series No.8.1, p.23
    16. Ozoihu, E.M., (2014). Human Immunodefficiency Virus (HIV)-Blood Interactions: Contact Angle Approach, PhD. Dissertation, Nnamdi Azikiwe University, Awka, Nigeria
    17. Palencia, M., Rivas, B.L., Pereira, E., Hernándezc, A., Prádanos. P. Study of polymer–metal ion–membrane interactions in liquid-phase polymer-based retention (LPR) by continuous diafiltration. J. Membr. Sci. 336 (2009) 128-139. https://doi.org/10.1016/j.memsci.2009.03.016.
    18. Readey, D. Kinetics in material science and engineering. CRC Press (2017) pp. 636. https://doi.org/10.1201/9781315381985.
    19. Wuerges, J., Garau, G., Geremia, S., Fedosov, S.N., Petersen, T.E., and Randaccio, L. (2006) Structural basis for mammalian vitamin B12transport by transcobalamin. PNAS103, 4386–4391. https://doi.org/10.1073/pnas.0509099103.
    20. ŻENKIEWICZ, M., 2000. Adhezja i modyfikowanie warstwy wierzchniej tworzyw wielkocząsteczkowych. WNT, Warszawa

  • Downloads

  • How to Cite

    Odeh, C. P., N.Ezenwa, O., Chinweze, A. E., & Okafor, A. A. (2024). Spectrophotometric analysis of surface free energies of polymer surfaces. International Journal of Engineering & Technology, 13(1), 87-94. https://doi.org/10.14419/4nks4e77