Ultrasonic Synthesis and Properties of Sodium Lignosulfonate-grafted Poly(Acrylic Acid-co-Vinyl Alcohol) Composite Superabsorbent Polymer

2016 ◽  
Vol 69 (10) ◽  
pp. 1155 ◽  
Author(s):  
Chen Hao ◽  
Jun Li ◽  
Qiang He ◽  
Zilong Zhou ◽  
Xiaowei Guo ◽  
...  
Keyword(s):  
Acrylic Acid ◽  
Vinyl Alcohol ◽  
High Efficiency ◽  
Orthogonal Experiment ◽  
Physiological Saline ◽  
Water Absorbency ◽  
Superabsorbent Polymer ◽  
Sodium Lignosulfonate ◽  
Scanning Calorimetry ◽  
Poly Acrylic Acid

In this paper, a green and high-efficiency method (ultrasound synthesis) has been applied in the preparation of a sodium lignosulfonate-grafted poly(acrylic acid-co-vinyl alcohol) superabsorbent polymer (SL-P(AA-co-VA)). By Fourier-transform infrared spectroscopy, scanning electron microscopy, and thermogravimetry–differential scanning calorimetry, the successful preparation was confirmed. An L16(4)5 orthogonal experiment was carried out to optimize synthetic conditions for SL-P(AA-co-VA). Under the optimized synthetic conditions, maximum water absorbency (949 g g–1) and physiological saline absorbency (62 g g–1) were achieved. Adjusting pH reduces the water absorbency of SL-P(AA-co-VA), as does the presence of metal ions. However, a rise in temperature does not have a significant influence on it. In general, both the water absorbency and physiological saline absorbency of SL-P(AA-co-VA) were significantly improved versus P(AA-co-VA) superabsorbent.

scholarly journals Bioactivated poly (vinyl alcohol) /poly(acrylic acid) based nanofiber for high-performance membrane techniques

2020 ◽  
Vol 9 (1) ◽  
pp. 819-823
Keyword(s):  
Breast Milk ◽  
Acrylic Acid ◽  
Vinyl Alcohol ◽  
High Performance ◽  
High Efficiency ◽  
Cow’S Milk ◽  
Poly Vinyl Alcohol ◽  
Buffer Solution ◽  
Cow's Milk ◽  
Poly Acrylic Acid

Membrane techniques involve a membrane that is either a polymeric material or a liquid for the separation of a substance. Electrospun nanofibers can serve as a separation membrane as they are capable of sensing the unwanted chemical substances when bioactivated with the immobilized antibodies. This study relates to a method and a bioactive poly(vinyl alcohol)/poly(acrylic acid) based nanofiber for the separation of substances from the milk and buffer solution. Nanofiber was prepared by the electrospinning method and was bioactivated by immobilizing the related antibody. In this study, cotinine was used as a model substance to be removed. The cotinine specific bioactive nanofiber was immersed in cow's milk, breast milk, and buffer solution for 30 minutes and then removed. The cotinine removal efficiency of the bioactive nanofiber was found to be 91% in cow’s milk, 94 % in breast milk and 79 % in buffer solution. High efficiency of nanofiber in milk samples can be attributed to the blocking feature of milk that facilitates antigen-antibody binding on the nanofiber. Bioactive nanofiber captured cotinine like a magnet. The use of nanofibers for the removal of unwanted substances will provide an inexpensive method for the removal of unwanted substances from the liquid medium.

Preparation of Novel Superabsorbent Polymer of Xanthan-G-Poly (Acrylic Acid)/Montmorillonite

2012 ◽  
Vol 174-177 ◽  
pp. 1376-1379 ◽  
Author(s):  
Zong Cheng Miao ◽  
Fang Wang ◽  
Deng Deng ◽  
Xiao Ping Huo ◽  
Yong Ming Zhang ◽  
...  
Keyword(s):  
Free Radical ◽  
Acrylic Acid ◽  
Graft Polymerization ◽  
Water Absorbency ◽  
Superabsorbent Polymer ◽  
Nacl Solution ◽  
Organic Montmorillonite ◽  
Swelling Capacity ◽  
Free Radical Initiator ◽  
Poly Acrylic Acid

A novel xanthan-g-poly (acrylic acid)/ organic montmorillonite (XG-g-PAA/OMMT) superabsorbent polymer were synthesized by free-radical graft polymerization in aqueous solution using potassium persulfate as a free radical initiator and methylenebisacrylamide as a crosslinker, and then organic montmorillonite (OMMT) was introduced as filler into superabsorbent. The effects of reaction variables were systematically optimized to achieve a superabsorbent with swelling capacity as high as possible. Under the optimal synthesis condition, the polymer attained the best water absorbency of 882 g/g in distilled water and 107 g/g in 0.9 wt% NaCl solution. And such excellent character could be important to use in many fields, for example, in agricultural and horticultural applications.

Synthesis, characterization, and their some chemical and biological properties of PVA/PAA/nPS hydrogel nanocomposites: Hydrogel and wound dressing

2020 ◽  
Vol 35 (3) ◽  
pp. 203-215
Author(s):  
Mehmet Emin Diken ◽  
Berna Koçer Kizilduman ◽  
Begümhan Yilmaz Kardaş ◽  
Enes Emre Doğan ◽  
Mehmet Doğan ◽  
...  
Keyword(s):  
Fourier Transform ◽  
Acrylic Acid ◽  
Infrared Spectra ◽  
Vinyl Alcohol ◽  
Fourier Transform Infrared ◽  
Poly Vinyl Alcohol ◽  
Seed Particles ◽  
Fourier Transform Infrared Spectra ◽  
Hydrogel Nanocomposites ◽  
Poly Acrylic Acid

The nanocomposite hydrogels were prepared by dispersing of the nanopomegranate seed particles into poly(vinyl alcohol)/poly(acrylic acid) blend matrix in an aqueous medium by the solvent casting method. These hydrogels were characterized using scanning electron microscopy, Fourier transform infrared spectra, differential scanning calorimetry, and optical contact angle instruments. The nanopomegranate seed, blend, and hydrogel nanocomposites were tested for microbial activity. In addition, cytocompatibilities of these blend and hydrogel nanocomposites/composites were tested on human lymphocyte with in vitro MTS cell viability assays. Fourier transform infrared spectra revealed that esterification reaction took place among functional groups in the structure of poly(vinyl alcohol) and poly(acrylic acid). The hydrophilic properties of all hydrogels decreased with increasing nanopomegranate seed content. The mean diameters of the nanopomegranate seed particles were about 88 nm. Nanopomegranate seed particles demonstrated antibacterial properties against gram-positive bacteria, Staphylococcus aureus, and gram-negative bacteria, Escherichia coli. The lymphocyte viabilities increased after addition of nanopomegranate seeds into the polymer blend. The swelling behavior of blend and hydrogels was dependent on the cross-linking density created by the reaction between poly(vinyl alcohol)/poly(acrylic acid) blend and nanopomegranate seed. Scanning electron microscopy images were highly consistent with Fourier transform infrared spectra, differential scanning calorimetry, and antibacterial activity results.

Dually cross-linked single network poly(acrylic acid) hydrogels with superior mechanical properties and water absorbency

Soft Matter ◽  
2016 ◽  
Vol 12 (24) ◽  
pp. 5420-5428 ◽  
Author(s):  
Ming Zhong ◽  
Yi-Tao Liu ◽  
Xiao-Ying Liu ◽  
Fu-Kuan Shi ◽  
Li-Qin Zhang ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Acrylic Acid ◽  
Water Absorbency ◽  
Superior Mechanical Properties ◽  
Poly Acrylic Acid
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