Preparation and characterization of poly(vinyl alcohol) nanofiber mats crosslinked with blocked isocyanate prepolymer

2010 ◽  
Vol 59 (12) ◽  
pp. 1683-1689 ◽  
Author(s):  
Ji-Hui Lee ◽  
Un-Soo Lee ◽  
Kwang-Un Jeong ◽  
Yun-A Seo ◽  
Soo-Jin Park ◽  
...  
Keyword(s):  
Vinyl Alcohol ◽  
Poly Vinyl Alcohol ◽  
Blocked Isocyanate ◽  
Nanofiber Mats ◽  
Isocyanate Prepolymer

Electrospinning fabrication and characterization of poly(vinyl alcohol)/montmorillonite nanofiber mats

2009 ◽  
Vol 113 (3) ◽  
pp. 1860-1867 ◽  
Author(s):  
Hyun Woo Lee ◽  
Mohammad Rezaul Karim ◽  
Hyun Mi Ji ◽  
Jin Hyun Choi ◽  
Han Do Ghim ◽  
...  
Keyword(s):  
Vinyl Alcohol ◽  
Poly Vinyl Alcohol ◽  
Fabrication And Characterization ◽  
Nanofiber Mats

Preparation and Characterization of Electrospun Poly(vinyl Alcohol)/Silk Fibroin Nanofibers as a Potential Drug Delivery System

2013 ◽  
Vol 709 ◽  
pp. 215-220 ◽  
Author(s):  
Dou Dou Zhang ◽  
Li Xing Dai
Keyword(s):  
Silk Fibroin ◽  
Release Rate ◽  
Vinyl Alcohol ◽  
In Vitro Release ◽  
Poly Vinyl Alcohol ◽  
Silk Fibroin Nanofibers ◽  
Nanofiber Mats ◽  
Drug Free

A series of poly(vinyl alcohol)/silk fibroin nanofibers loaded with 10 wt.% vanillin were successfully prepared from aqueous solutions via electrospinning. The morphology, weight loss and swelling ability of the nanofibers were characterized. The controlled release characteristics of vanillin in the nanofiber mats were evaluated by in vitro release test. Vanillin-loaded nanofibers had smooth surfaces like drug-free nanofibers, and showed thinner diameter than the latter. The release rate of vanillin in the nanofiber mats decreased with the increment of silk fibroin content, so by regulating the content the drug release could be controlled. Moreover, after treated with ethanol the nanofiber mats showed better stability against disintegration in water and sustained release rate of vanillin than untreated mats.

Characterization of poly (vinyl alcohol) nanofiber mats cross-linked with glutaraldehyde

2012 ◽  
Vol 43 (1) ◽  
pp. 34-44 ◽  
Author(s):  
Xiaohong Qin ◽  
Guanxian Dou ◽  
Guojun Jiang ◽  
Sai Zhang
Keyword(s):  
Vinyl Alcohol ◽  
Poly Vinyl Alcohol ◽  
Nanofiber Mats

Preparation and characterization of poly(vinyl alcohol)/gum tragacanth/cellulose nanocomposite film

2021 ◽  
pp. 50672
Author(s):  
Majid Alizadeh Moghadam ◽  
Reza Mohammadi ◽  
Ehsan Sadeghi ◽  
Mohammad Amin Mohammadifar ◽  
Mohammad Nejatian ◽  
...  
Keyword(s):  
Vinyl Alcohol ◽  
Nanocomposite Film ◽  
Poly Vinyl Alcohol ◽  
Gum Tragacanth

scholarly journals Equilibrium, Thermodynamic, Reuse, and Selectivity Studies for the Bioadsorption of Lanthanum onto Sericin/Alginate/Poly(vinyl alcohol) Particles

Polymers ◽  
2021 ◽  
Vol 13 (4) ◽  
pp. 623
Author(s):  
Talles Barcelos da Costa ◽  
Meuris Gurgel Carlos da Silva ◽  
Melissa Gurgel Adeodato Vieira
Keyword(s):  
Vinyl Alcohol ◽  
Economic Value ◽  
Poly Vinyl Alcohol ◽  
Thermodynamic Quantities ◽  
High Demand ◽  
Batch System ◽  
Equilibrium Data ◽  
Selectivity Studies ◽  
Amorphous Character

In a scenario of high demand, low availability, and high economic value, the recovery of rare-earth metals from wastewater is economically and environmentally attractive. Bioadsorption is a promising method as it offers simple design and operation. The aim of this study was to investigate lanthanum bioadsorption using a polymeric bioadsorbent of sericin/alginate/poly(vinyl alcohol)-based biocomposite. Batch system assays were performed to evaluate the equilibrium, thermodynamics, regeneration, and selectivity of bioadsorption. The maximum capture amount of lanthanum at equilibrium was 0.644 mmol/g at 328 K. The experimental equilibrium data were better fitted by Langmuir and Dubinin–Radushkevich isotherms. Ion exchange mechanism between calcium and lanthanum (2:3 ratio) was confirmed by bioadsorption isotherms. Thermodynamic quantities showed that the process of lanthanum bioadsorption was spontaneous (−17.586, −19.244, and −20.902 kJ/mol), endothermic (+15.372 kJ/mol), and governed by entropic changes (+110.543 J/mol·K). The reusability of particles was achieved using 0.1 mol/L HNO3/Ca(NO3)2 solution for up to five regeneration cycles. The bioadsorbent selectivity followed the order of lanthanum > cadmium > zinc > nickel. Additionally, characterization of the biocomposite prior to and post lanthanum bioadsorption showed low porosity (9.95 and 12.35%), low specific surface area (0.054 and 0.019 m2/g), amorphous character, and thermal stability at temperatures up to 473 K. This study shows that sericin/ alginate/poly(vinyl alcohol)-based biocomposites are effective in the removal and recovery of lanthanum from water.

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