The states of water in tryptophan grafted hydroxypropyl methylcellulose hydrogels and their effect on the adsorption of methylene blue and rhodamine B

Toledo, Paulo V. O.; Bernardinelli, Oigres Daniel; Sabadini, Edvaldo; Petri, Denise Freitas Siqueira

doi:10.1016/j.carbpol.2020.116765

Cited by 21 publications

(8 citation statements)

References 42 publications

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“…Cassava starch and xanthan gum were successfully crosslinked with citric acid by extrusion and thermopressing [153]. In systems containing HPMC and amino acids, citric acid molecules act simultaneously as crosslinker for the HPMC chains and as mediators for the grafting of amino acid molecules along the HPMC chains [154]. The crosslinking of HPMC [155], or xanthan gum, locust bean gum and chitosan [156], and functionalization with β-cyclodextrin was successfully achieved with the aid of citric acid.…”

Section: Polycarboxylic Acidsmentioning

confidence: 99%

Crosslinkers for polysaccharides and proteins: Synthesis conditions, mechanisms, and crosslinking efficiency, a review

Alavarse

Frachini

Silva

et al. 2022

International Journal of Biological Macromolecules

119

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Section: Polycarboxylic Acidsmentioning

confidence: 99%

Crosslinkers for polysaccharides and proteins: Synthesis conditions, mechanisms, and crosslinking efficiency, a review

Alavarse

Frachini

Silva

et al. 2022

International Journal of Biological Macromolecules

119

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“…The concentration of the MB solution in the adsorption experiments was measured by UV–vis spectrophotometry (UV-2700, SHIMADZU, Japan) at 664 nm. The adsorption capacity of CMC/PAA microgels for MB at adsorption time Q t and equilibrium time Q e were calculated using eqs and , respectively. , Removal efficiency (RE) of MB was determined using eq where C 0 (mg/L), C t (mg/L), and C e (mg/L) are the initial concentration of MB, the concentration of MB at time t , and the equilibrium concentration of MB, respectively.…”

Section: Methodsmentioning

confidence: 99%

Synthesis of Sodium Carboxymethyl Cellulose/Poly(acrylic acid) Microgels via Visible-Light-Triggered Polymerization as a Self-Sedimentary Cationic Basic Dye Adsorbent

Feng

Dong

et al. 2022

Langmuir

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In this study, sodium carboxymethyl cellulose/poly(acrylic acid) (CMC/PAA) microgels were successfully synthesized via visible-light-triggered free-radical polymerization to remove methylene blue (MB) from water. The microgels had a loose and porous 3-D network structure, exhibiting excellent adsorption performance. The equilibrium adsorption capacity and the removal efficiency of the microgels reached approximately 1479 mg/g and 97%, respectively, when the initial concentration of MB was 300 mg/L. The adsorption kinetics was well described by the pseudo-second-order model, and the adsorption isotherms followed the Langmuir isothermal model. Notably, CMC/PAA microgels could naturally settle and be separated from the MB solution. Furthermore, the recovery efficiency of the regenerated CMC/PAA microgels reached approximately 94% after five adsorption–desorption cycles. Therefore, the microgels could be used as promising adsorbents due to the advantages of high adsorption capacity, fast removal rate, and reusability.

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“…Paulo et al have prepared hydrogels by grafting tryptophan to HPMC, which had a high compression modulus of 201 kPa. [191] According to the physical modification, the radiation could trigger radicals and thus can be used to form cellulose-based hydrogel (Figure 6C). This was an efficient process without adding chemicals (i. e., monomers and initiators), and the properties of as-prepared hydrogels can be controlled by the radiation dose and time.…”

Section: Free Radical Polymerizationmentioning

confidence: 99%

Cellulose Dissolution, Modification, and the Derived Hydrogel: A Review

Wu,

Li,

Zhang

et al. 2023

ChemSusChem

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The development of cellulose‐based hydrogel has occupied a pivotal position in almost all walks of life. However, the native cellulose can not be directly used for preparing hydrogel due to the complex non‐covalent interactions. Some literature has discussed the dissolution and modification of cellulose but has yet to address the influence of the pretreatment on the as‐prepared hydrogels. Firstly, the "touching" of cellulose by derivative and non‐derivative solvents was introduced, viz., the dissolution of cellulose. Secondly, the "conversion" of functional groups on the cellulose surface by special routes, viz., the modification of cellulose. The above‐mentioned two parts were intended to explain the changes in physicochemical properties of cellulose by these routes and their influences on the subsequent hydrogel preparation. Finally, we summarized the “reinforcement” of cellulose‐based hydrogels by physical and chemical techniques, viz., improving the mechanical properties of cellulose‐based hydrogels and the changes in the multi‐level structure of the interior of cellulose‐based hydrogels.

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The states of water in tryptophan grafted hydroxypropyl methylcellulose hydrogels and their effect on the adsorption of methylene blue and rhodamine B

Cited by 21 publications

References 42 publications

Crosslinkers for polysaccharides and proteins: Synthesis conditions, mechanisms, and crosslinking efficiency, a review

Crosslinkers for polysaccharides and proteins: Synthesis conditions, mechanisms, and crosslinking efficiency, a review

Synthesis of Sodium Carboxymethyl Cellulose/Poly(acrylic acid) Microgels via Visible-Light-Triggered Polymerization as a Self-Sedimentary Cationic Basic Dye Adsorbent

Cellulose Dissolution, Modification, and the Derived Hydrogel: A Review

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