Macroporous cellulose-based cryogels with tunable porous structure and surface functional groups

Su, Xiuping; Zhang, Qin; Zhong, Qiwei; Liu, Lin; Gao, Huiying; Meng, Ranju; Yao, Juming

doi:10.1007/s12221-016-5563-3

Cited by 14 publications

(9 citation statements)

References 43 publications

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“…The CP bio-adsorbent was prepared by grafting AA and AM monomers on cellulose macromolecular chain through free-radical copolymerization, as previously described (Su et al 2016). Briefly, 2 g of cotton linter was dissolved in 66 g of a mixed aqueous solution of 12 wt% urea/7 wt% NaOH to obtain a cellulose solution.…”

Section: Synthesis Of Cp Bio-adsorbentmentioning

confidence: 99%

Efficient Removal of Cationic and Anionic Dyes from Aqueous Solution Using Cellulose-g-p(AA-co-AM) Bio-Adsorbent

Liu

Zhang

et al. 2017

BioResources

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The removal of cationic methylene blue (MB) and anionic acid red 1 (AR1) dyes from aqueous solution was studied using cellulose-g-p(AA-co-AM) bio-adsorbent (CP bio-adsorbent). The CP bio-adsorbent with surface multiple functional groups and macroporous network structure was synthesized via grafting the acrylic acid (AA) and acrylamide (AM) onto cellulose molecules. The adsorption behavior of the bio-adsorbent to dyes in the aqueous solution was studied. The effects of solution pH, temperature, initial dye concentration, and contact time on the adsorption capacity of the bio-adsorbent were investigated. Due to the abundant functional groups and macroporous network structure, the CP bioadsorbent exhibited remarkable adsorption performance for the removal of type dyes with an equilibrium adsorption capacity of 998 mg·g -1 for MB and 523 mg·g -1 for AR1. The kinetic studies revealed that the adsorption of dyes was exactly described by a pseudo-second-order kinetic model. Comparison with other bio-adsorbents confirmed that the eco-friendly CP bio-adsorbent possessed excellent potential for water purification.

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Section: Synthesis Of Cp Bio-adsorbentmentioning

confidence: 99%

Efficient Removal of Cationic and Anionic Dyes from Aqueous Solution Using Cellulose-g-p(AA-co-AM) Bio-Adsorbent

Liu

Zhang

et al. 2017

BioResources

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“…In fact, the suitability of hydrogels as biomaterial and their performance in particular applications depends, to a large extent, on the network structure, porosity, and pore size of the hydrogel. Presently, super-macroporous cellulose-based cryogels attract more interest for biomedical applications because of their interconnected super-macropores, with sizes ranging from several to hundreds of microns, which allow the unhindered diffusion of solutes or even colloidal particles [8]. Cryogels are super-macroporous hydrogels synthesized by applying cryogenic treatment of gel-forming systems [9].…”

Section: Introductionmentioning

confidence: 99%

“…The addition of high concentrations of nanoparticles was needed to afford the HEC/BC cryogel with improved mechanical properties compared to the pure HEC/BC cryogel. Macroporous cellulose-based cryogels were fabricated by grafting acrylic acid and acrylamide to cellulose using a cryopolymerization technique [8]. The interconnected macroporous structures of the cellulose-based cryogels were strongly influenced by the amount of crosslinker and extra water added in the process of cryopolymerization.…”

Section: Introductionmentioning

confidence: 99%

Highly Elastic Super-Macroporous Cryogels Fabricated by Thermally Induced Crosslinking of 2-Hydroxyethylcellulose with Citric Acid in Solid State

Bozova

Petrov

2021

Molecules

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Biopolymer materials have been considered a “green” alternative to petroleum-based polymeric materials. Biopolymers cannot completely replace synthetic polymers, but their application should be extended as much as possible, exploiting the benefits of their low toxicity and biodegradability. This contribution describes a novel strategy for the synthesis of super-macroporous 2-hydroxyethylcellulose (HEC) cryogels. The method involves cryogenic treatment of an aqueous solution of HEC and citric acid (CA), freeze drying, and thermally induced crosslinking of HEC macrochains by CA in a solid state. The effect of reaction temperature (70–180 °C) and CA concentration (5–20 mass % to HEC) on the reaction efficacy and physico-mechanical properties of materials was investigated. Highly elastic cryogels were fabricated, with crosslinking carried out at ≥ 100 °C. The storage modulus of the newly obtained HEC cryogels was ca. 20 times higher than the modulus of pure HEC cryogels prepared by photochemical crosslinking. HEC cryogels possess an open porous structure, as confirmed by scanning electron microscopy (SEM), and uptake a relatively large amount of water. The swelling degree varied between 17 and 40, depending on the experimental conditions. The degradability of HEC cryogels was demonstrated by acid hydrolysis experiments.

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“…The majority of the uptake of water by the p(HEMA) and the p(HEMA-I) cryogel columns occurred within the first 1 min and then reached equilibrium after 15 min. The fast-swelling behavior in the first 1 min might result from the relatively large pore structure of these two cryogel columns, which accelerated the water molecules to diffuse into the pores of cryogels [35,39,40]. Table 1 shows the swelling degree (gH 2 O/g cryogel) and macroporosity (volume %) of the p(HEMA) and the p(HEMA-I) cryogel columns.…”

Section: Characterizationmentioning

confidence: 99%

Poly(Hydroxyethyl Methacrylate) Immunoaffinity Cryogel Column for the Purification of Human Immunoglobulin M

Bakhshpour

Topçu

Bereli

et al. 2020

Gels

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Human immunoglobulin M (hIgM) antibodies are considered as hopeful tools for diseases therapy. Therefore, chromatography approaches are used to purify hIgM with a single step. In this study, we prepared a poly(hydroxyethyl methacrylate) based immunoaffinity p(HEMA-I) cryogel column by using cyanamide to immobilize antihuman immunoglobulin on the p(HEMA) cryogel for purification of hIgM in aqueous solution and artificial human plasma. The characterization of the p(HEMA) cryogel column was performed by using a scanning electron microscope (SEM), micro-computerized tomography (µ-CT), Fourier transform infrared spectroscopy (FTIR), swelling degree and macro-porosity. Further, the optimizations of various parameters were performed such as, pH, ionic strength, temperature and concentration of hIgM in aqueous solutions. In addition, the Langmuir adsorption model was supported by experimental results. Maximum adsorbed amount of hIgM corresponded to 11.1 mg/g at pH 5.75 [morpholino ethanesulfonic acid (MES buffer)]. Our results indicated that the p(HEMA-I) cryogel column can be reused at least 10 times without significant loss in adsorption capacity. As a natural source, artificial human plasma was selected for hIgM adsorption and the purity of hIgM was evaluated using sodium dodecyl sulfate polyacrylamide gel electrophoresis (SDS-PAGE).

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Macroporous cellulose-based cryogels with tunable porous structure and surface functional groups

Cited by 14 publications

References 43 publications

Efficient Removal of Cationic and Anionic Dyes from Aqueous Solution Using Cellulose-g-p(AA-co-AM) Bio-Adsorbent

Efficient Removal of Cationic and Anionic Dyes from Aqueous Solution Using Cellulose-g-p(AA-co-AM) Bio-Adsorbent

Highly Elastic Super-Macroporous Cryogels Fabricated by Thermally Induced Crosslinking of 2-Hydroxyethylcellulose with Citric Acid in Solid State

Poly(Hydroxyethyl Methacrylate) Immunoaffinity Cryogel Column for the Purification of Human Immunoglobulin M

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