Electrospinning preparation and mechanical properties of PVA/HNTs composite nanofibers

Abstract

In this paper, the PVA/HNTs composite nanofibers with well-enhanced mechanical properties were successfully prepared by electrospinning technique. The structure and properties of the composite nanofibers were characterized by TEM, XRD, FT-IR, and DSC. The results indicated that the highly oriented and dispersed HNTs wrapped in polymer matrix were achieved by inducing function during electrospinning processing. The mechanical properties of the PVA/HNTs composite nanofibers depended on HNTs content were investigated, which showed 72.4% increase in tensile strength at optimal filling content.

The Role of Nanoparticle Shapes and Structures in Material Characterisation of Polyvinyl Alcohol (PVA) Bionanocomposite Films

“…As illustrated in Figure 4b, HNT nanoparticles are separated from one another with better HNT dispersion in PVA bionanocomposites reinforced with 3 wt % HNTs, as opposed to typical clay agglomeration and clustering issues beyond the 3 wt % HNTs shown in Figure 4c,d. An excessive amount of HNTs results in decreasing intraparticle spacing along with the higher intramolecular bonding of HNTs, leading to particle agglomeration [36]. Besides, the average root mean square (Rq) value as an indicator of the surface roughness of PVA bionanocomposites has been reported to be 2.4 ± 0.13 nm at the HNT content of 3 wt % when compared with 1.9 ± 0.17 nm for neat PVA, as shown in Figure 4a.…”

High‐flux PVDF membrane incorporated with β‐cyclodextrin modified halloysite nanotubes for dye rejection and Cu (II) removal from water

“…As we know, HNTs belong to a hollow tubular structure with 2 open ends, which provides some hydrophilic channels for water permeation. 20 It could be seen from TEM images that the external and internal diameters of the HNTs were nearly 30 to 70 nm and 20 to 30 nm, respectively. However, the surfaces of HNTs were coated by some irregular substances after β-CD modification, which is shown in Figure 5B clearly.…”

“…The morphologies of raw HNTs (a) and β‐CD‐HNTs (b) were observed by TEM shown in Figure . As we know, HNTs belong to a hollow tubular structure with 2 open ends, which provides some hydrophilic channels for water permeation . It could be seen from TEM images that the external and internal diameters of the HNTs were nearly 30 to 70 nm and 20 to 30 nm, respectively.…”

“…Halloysite nanotube (HNT)‐derived composites are new prospective fillers for polymeric composites and have also attracted great interests in the field of wastewater treatment, due to their excellent physical and chemical properties . Zhang et al summarized different HNT‐derived applications, such as the removal of heavy metal ions and dyes.…”

“…[14][15][16] Ghaemi et al 17 Halloysite nanotube (HNT)-derived composites are new prospective fillers for polymeric composites and have also attracted great interests in the field of wastewater treatment, due to their excellent physical and chemical properties. 19,20 Zhang et al 21 In our previous work, 26 we reported polyvinylidene fluoride (PVDF) nanofiltration membrane blended with silane coupling agent modified HNTs, which improved the dispersion of HNTs in membrane and had a good removal ratio of dyes and Cu (II) mixed solution. It was considered that for a mixed wastewater system, the pollutants with large size such as suspended solid, insoluble oils, bacteria, and protein could be removed by membrane because of the effects of pore rejection on the surface of membrane.…”