Effects of processing parameters on morphology of electrospun polystyrene nanofibers

Nitanan, Todsapon; Opanasopit, Praneet; Akkaramongkolporn, Prasert; Rojanarata, Theerasak; Ngawhirunpat, Tanasait; Supaphol, Pitt

doi:10.1007/s11814-011-0167-5

Cited by 54 publications

(50 citation statements)

References 29 publications

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“…One possible reason is that sulfonic acid groups may have attached to the surface of the PS nanofibers, causing increase in the ionization and dissolution of the PS nanofibers. This result was consistent with a previous work [13] which reported that the noncrosslinked PS nanofibers were soluble at high degrees of sulfonation. Therefore, crosslinking the PS nanofibers are necessary for the preparation of insoluble PSNIE with an acceptable IEC.…”

Section: Discussionsupporting

confidence: 93%

“…This might be due to shrinkage, closer proximity, and additional breaks of the PSNIE at this ratio as compared with the other ratios (Figure 1), which resulted in the lowest IEC. These observations were consistent with a previous study, which revealed that a decrease in IEC is due to the shrinkage and dissolution of the fibers during sulfonation reaction [13]. PS nanofibers were insufficiently crosslinked at a ratio of 50/50, to completely dissolve during the sulfonation reaction.…”

Section: Discussionsupporting

confidence: 93%

“…PS nanofibers with the smallest diameter (376 ± 36 nm) were prepared using our previously described method [13] and were used to prepare the PSNIE. In a preliminary study, PS nanofibers were sulfonated without a prior crosslinking process.…”

Section: Resultsmentioning

confidence: 99%

“…These peaks indicate that sulfonic acid groups reacted with the aromatic hydrocarbons of the PS nanofibers at the para-position [13,16]. In addition, a peak caused by C-H vibration at 1412 cm -1 was found, which was probably due to a methylene bridge in the para-position [17].…”

Section: Effect Of Sulfuric Acid/formaldehyde Ratio On Crosslinlingmentioning

confidence: 94%

“…Therefore, reproducible electrospinning of uniform PS nanofibers is essential. Recently, we successfully prepared PS nanofibers by optimizing the parameters in the electrospinning process, which included the PS concentration, ratio of the solvent mixture, inner diameter of the capillary tip and the addition of tetrabutylammonium bromide (TBAB) in the solvent mixture [13]. Sulfonation is required to produce cation exchange PS nanofibers [9].…”

Section: Introductionmentioning

confidence: 99%

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Fabrication of Cationic Exchange Polystyrene Nanofibers for Drug Delivery

Akkaramongkolporn¹,

Opanasopit

2014

Trop. J. Pharm Res

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Purpose: To prepare polystyrene nanofiber ion exchangers (PSNIE) with surface cation exchange functionality using a new method based on electrospinning and also to optimize crosslinking and sulfonation reactions to obtain PSNIE with maximum ion exchange capacity (IEC). Method: The nanofibers were prepared from 15% w/v polystyrene solution in dimethylacetamide (DMAc) containing 0.025 %w/v tetrabutylammonium bromide (TBAB) using electrospinning technique, followed by crosslinking with sulfuric acid/formaldehyde in a ratio ranging from 100/0 to 50/50 v/v and sulfonation in sulfuric acid. Degree of crosslinking was determined as the amount of fibers that remained in dichloromethane. The morphology and diameter of the fibers were evaluated by scanning electron microscopy (SEM) while IEC of PSNIE was performed by salt splitting titration. Results: PSNIE crosslinked with a sulfuric acid/formaldehyde ratio of 90/10 with 0.1 %w/v silver sulfate for 10 min at 70  C and sulfonated in 98 % sulfuric acid with 0.2 %w/v silver sulfate as the catalyst at 100  C for 30 min showed a maximum IEC of 3.21 meq/g-dry-PSNIE. Increase in sulfonation temperature caused the IEC of PSNIE to increase due to faster sulfonation. It was observed that the higher the temperature the faster the rate of sulfonation reaction. The diameter of the fibers after sulfonation was 404 ± 42 nm. Conclusion: These results indicate that PSNIE can be successfully prepared by electrospinning. Furthermore, cationic drug can be loaded onto the novel PSNIE for controlled release delivery.

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Section: Discussionsupporting

confidence: 93%

Section: Discussionsupporting

confidence: 93%

Section: Resultsmentioning

confidence: 99%

Section: Effect Of Sulfuric Acid/formaldehyde Ratio On Crosslinlingmentioning

confidence: 94%

Section: Introductionmentioning

confidence: 99%

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Fabrication of Cationic Exchange Polystyrene Nanofibers for Drug Delivery

Akkaramongkolporn¹,

Opanasopit

2014

Trop. J. Pharm Res

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Multifactorial modeling and optimization of solution and electrospinning parameters to generate superfine polystyrene nanofibers

et al. 2018

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This study was conducted to provide a quantitative understanding of the influence of the different solution and electrospinning variables on the morphology and the mean diameter of electrospun polystyrene nanofibers. In this regard, the effect of different solvents and ionic additives on the electrical conductivity, viscosity, and surface tension of the electrospinning solutions and thereby the morphology of nanofibers were examined. The results indicated that the morphology of the fibers is extremely dependent on the solvent's properties, especially volatility and electrical conductivity, and the ionic characteristics of additives. Finally, to estimate the optimal electrospinning conditions for production of nanofibers with minimum possible diameter, modeling of the process was undertaken using the response surface methodology.Experimentally, nanofibers with the finest diameter of 169 ± 21 nm were obtained under the optimized conditions, and these could be considered promising candidates for a wide practical range of applications ranging from biosensors to filtration.

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Influence of additive on structure of PVDF nanofibers electrospun via new spinneret design

Kotaki

2013

J of Applied Polymer Sci

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Surface morphology and internal structure of polyvinylidene fluoride (PVDF) nanofibers were investigated in this study. PVDF nanofibers were electrospun by two types of spinnerets, nozzle and channel spinneret, with different contents of tetrabutylammonium chloride (TBAC) and at various take‐up velocities. The new spinneret design, channel spinneret, resulted in thicker fibers while high β‐phase content and small d‐spacing were obtained, especially in the case of low TBAC content. And high TBAC content led to finer PVDF nanofibers with high β‐phase content and small d‐spacing compared to low TBAC content regardless of spinneret types, while an increase in take‐up velocity did not have significant effect on both morphology and internal structure of PVDF nanofibers regardless of TBAC content. It suggests that electrostatic drawing acted dominantly rather than mechanically drawing in the system cooperating TBAC. However, the decreasing difference between two types of spinnerets was observed in terms of β‐phase content with an increase in TBAC content. © 2013 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 130: 1752–1758, 2013

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Effects of processing parameters on morphology of electrospun polystyrene nanofibers

Cited by 54 publications

References 29 publications

Fabrication of Cationic Exchange Polystyrene Nanofibers for Drug Delivery

Fabrication of Cationic Exchange Polystyrene Nanofibers for Drug Delivery

Multifactorial modeling and optimization of solution and electrospinning parameters to generate superfine polystyrene nanofibers

Influence of additive on structure of PVDF nanofibers electrospun via new spinneret design

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