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Statistical optimization for preparing nanofibrous mats of polybutylene adipate co‐terephthalate/poly(vinylpyrrolidone) blends by solution blow spinning

2022; Wiley; Volume: 62; Issue: 8 Linguagem: Inglês

10.1002/pen.26024

1548-2634

Leonardo Almeida Freire, Ana Carolina Cortez Lemos, Kelvi Wilson Evaristo Miranda, Joaquim Paulo da Silva, Juliano Elvis de Oliveira,

Polymer crystallization and properties

Abstract Solution blow spinning (SBS) is used to make poly(butylene‐adipate‐co‐terephthalate) (PBAT) and poly(vinylpyrrolidone) (PVP) blend nanofibers and study the effect of process parameters on their formation. A 3 4–1 fractional factorial statistical model with three levels and four factors was applied. The factors included the concentration of PVP (wt%) in the PBAT polymer matrix, pressurized air pressure (psi), working distance (cm), and feed rate (ml h −1 ). The linear and quadratic effects were analyzed using a Pareto chart and verified in a well‐adjusted response surface model. The PVP concentration and working distance had a significant effect on the production of nanofibers. The nanofibrous mats were evaluated by scanning electron microscopy (SEM) and had a mean diameter ranging from 164 to 656 nm. A higher concentration of PVP and a shorter working distance resulted in lower mean fiber diameter. In addition, X‐ray diffraction revealed an increase in the degree of crystallinity of the nanofibrous PBAT due to a greater degree of packing among the polymer molecules. However, the addition of PVP to the polymer matrix is associated with a reduction in the degree of crystallinity of the nanofibrous mat.