Cellulose Graft Poly(acrylic acid) and Polyacrylamide: Grafting Efficiency and Heavy Metal Adsorption Performance

Wichaita, Waraporn; Samart, Chanatip; Yoosuk, Boonyawan; Kongparakul, Suwadee

doi:10.1002/masy.201400119

Cited by 16 publications

(4 citation statements)

References 24 publications

(36 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…4A(a), the peaks located at 2956, 1721, 1470, 1403 cm −1 originate from the pure PAA that can be assigned to the stretching and bending vibrations of CH 2 , stretching vibrations of C=O and C-O of COOH groups, respectively, and the peaks at 1545 cm −1 , 1160 cm −1 come from the C-O moieties of the PAA [23]. In addition, a broad shoulder band in the 3150 cm −1 region is attributed to the -OH of COOH [24]. Upon the CDI activation, the peaks appeared at 1767 cm −1 , 1448 cm −1 , and 1366 cm −1 were attributed to the imidazole moiety [25] of the activated membrane as shown in Fig.…”

Section: Covalent Immobilization Of Achementioning

confidence: 99%

Covalent immobilization of acetylcholinesterase on a novel polyacrylic acid‐based nanofiber membrane

Çakıroğlu

Çi̇ği̇l

Ogan

et al. 2018

Engineering in Life Sciences

View full text Add to dashboard Cite

In this study, polyacrylic acid‐based nanofiber (NF) membrane was prepared via electrospinning method. Acetylcholinesterase (AChE) from Electrophorus electricus was covalently immobilized onto polyacrylic acid‐based NF membrane by demonstrating efficient enzyme immobilization, and immobilization capacity of polymer membranes was found to be 0.4 mg/g. The novel NF membrane was synthesized via thermally activated surface reconstruction, and activation with carbonyldiimidazole upon electrospinning. The morphology of the polyacrylic acid‐based membrane was investigated by scanning electron microscopy, Fourier Transform Infrared Spectroscopy, and thermogravimetric analysis. The effect of temperature and pH on enzyme activity was investigated and maxima activities for free and immobilized enzyme were observed at 30 and 35°C, and pH 7.4 and 8.0, respectively. The effect of 1 mM Mn2+, Ni2+, Cu2+, Zn2+, Mg2+, Ca2+ ions on the stability of the immobilized AChE was also investigated. According to the Michaelis–Menten plot, AChE possessed a lower affinity to acetylthiocholine iodide after immobilization, and the Michaelis–Menten constant of immobilized and free AChE were found to be 0.5008 and 0.4733 mM, respectively. The immobilized AChE demonstrated satisfactory reusability, and even after 10 consecutive activity assay runs, AChE maintained ca. 87% of its initial activity. Free enzyme lost its activity completely within 60 days, while the immobilized enzyme retained approximately 70% of the initial activity under the same storage time. The favorable reusability of immobilized AChE enables the support to be employable to develop the AChE‐based biosensors.

show abstract

Section: Covalent Immobilization Of Achementioning

confidence: 99%

Covalent immobilization of acetylcholinesterase on a novel polyacrylic acid‐based nanofiber membrane

Çakıroğlu

Çi̇ği̇l

Ogan

et al. 2018

Engineering in Life Sciences

View full text Add to dashboard Cite

show abstract

“…It can be seen from the figure that the mass loss rate of CMSM-MIPs at room temperature ∼318 °C is 13.1%. This is caused by the evaporation of water molecules and small molecules . At the stage of 318 ∼478 °C, it is the main pyrolysis stage of CMSM-MIPs, and the mass loss rate is 82.7%.…”

Section: Resultsmentioning

confidence: 84%

“…This is caused by the evaporation of water molecules and small molecules. 25 At the stage of 318 ∼478 °C, it is the main pyrolysis stage of CMSM- 4a, the strength of O and C in CMSM-MIPs is slightly higher than that in CMSM-NIPs. 26 Furthermore, as shown in Figure 4b,d noncovalent bond between different concentrations of functional monomer and template molecule by UV spectrophotometry.…”

Section: ■ Introductionmentioning

confidence: 93%

Preparation and Selective Adsorption Performance of the Carboxymethyl Salix psammophila Wood Powder-Imprinted Membrane for Tetracycline

Liu,

He,

Zhao

et al. 2024

Langmuir

View full text Add to dashboard Cite

Carboxymethyl Salix psammophila wood powderimprinted membranes (CMSM-MIPs) were prepared by using wet spinning technology and molecular-imprinting technology for the selective removal of tetracycline from wastewater. Scanning electron microscopy, X-ray diffraction, thermogravimetry, and X-ray photoelectron spectroscopy characterizations demonstrate that CMSM-MIPs retain the membranous structure of Carboxymethyl Salix psammophila wood powder membranes, successfully encapsulate thin layers of imprinted polymers on the membrane surface, and exhibit excellent thermal stability. The adsorption results showed that CMSM-MIPs had the highest selective adsorption capacity for tetracycline, which was 253.8 mg/g. In addition, the adsorption capacities for oxytetracycline and chlortetracycline were 208.8 and 188 mg/g, respectively. It can be observed that CMSM-MIPs not only exhibit a high adsorption capacity for tetracycline but also demonstrate good adsorption capacities for oxytetracycline and chlortetracycline. The experimental results showed that CMSM-MIPs were best fitted with pseudo-second-order kinetics and most consistent with Freundlich fitting. The regeneration experiment showed that CMSM-MIPs still had good regeneration performance after 5 regeneration cycles. In conclusion, the CMSM-MIPs can not only have the natural adsorption performance of Salix psammophila wood powder but also give it higher selectivity through molecular imprinting, so as to achieve efficient removal of target organic pollutants in water.

show abstract

“…An increase in weight loss during minor decomposition was observed when the grafting percentage increased. At temperatures from 336–420 °C, major decomposition was observed, which corresponded to the polymer backbone of PAA- co -PAM [ 59 ] and the DPNR. This confirms the presence of DPNR and PAA- co -PAM in the modified samples.…”

Section: Resultsmentioning

confidence: 99%

Preparation of Poly(acrylic acid-co-acrylamide)-Grafted Deproteinized Natural Rubber and Its Effect on the Properties of Natural Rubber/Silica Composites

et al. 2022

View full text Add to dashboard Cite

This work aims to enhance the polarity of natural rubber by grafting copolymers onto deproteinized natural rubber (DPNR) to improve its compatibility with silica. Poly(acrylic acid-co-acrylamide)-grafted DPNR ((PAA-co-PAM)-DPNR) was successfully prepared by graft copolymerization with acrylic acid and acrylamide in the latex stage, as confirmed by FTIR. The optimum conditions to obtain the highest conversion, grafting efficiency, and grafting percentage were a reaction time of 360 min, a reaction temperature of 50 °C, and an initiator concentration of 1.0 phr. The monomer conversion, grafting efficiency, and grafting percentage were 91.9–94.1, 20.8–38.9, and 2.1–9.9%, respectively, depending on the monomer content. It was shown that the polarity of the natural rubber increased after grafting. The (PAA-co-PAM)-DPNR was then mixed with silica to prepare DPNR/silica composites. The presence of the (PAA-co-PAM)-DPNR and silica in the composites was found to improve the mechanical properties of the DPNR. The incorporation of 10 phr of silica into the (PAA-co-PAM)-DPNR with 10 phr monomer increased its tensile strength by 1.55 times when compared to 10 phr of silica loaded into the DPNR. The silica-filled (PAA-co-PAM)-DPNR provided s higher storage modulus, higher Tg, and a lower tan δ peak, indicating stronger modified DPNR/silica interactions and greater thermal stability when compared to silica-filled DPNR.

show abstract

Cellulose Graft Poly(acrylic acid) and Polyacrylamide: Grafting Efficiency and Heavy Metal Adsorption Performance

Cited by 16 publications

References 24 publications

Covalent immobilization of acetylcholinesterase on a novel polyacrylic acid‐based nanofiber membrane

Covalent immobilization of acetylcholinesterase on a novel polyacrylic acid‐based nanofiber membrane

Preparation and Selective Adsorption Performance of the Carboxymethyl Salix psammophila Wood Powder-Imprinted Membrane for Tetracycline

Preparation of Poly(acrylic acid-co-acrylamide)-Grafted Deproteinized Natural Rubber and Its Effect on the Properties of Natural Rubber/Silica Composites

Contact Info

Product

Resources

About