Cellulosic biomass-based sustainable hydrogels for wastewater remediation: Chemistry and prospective

Thakur, Sourbh; Verma, Ankit; Kumar, Vinod; Yang, Xiao; Krishnamurthy, S.; Coulon, Frédéric; Thakur, Vijay Kumar

doi:10.1016/j.fuel.2021.122114

Cited by 92 publications

(17 citation statements)

References 178 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…However, these fast ionic cross-linking limits control over the properties of alginate hydrogels, such as porosity and mechanical elasticity due to fast reaction between ionic groups. Generally, the obtained hydrogels possess fast-crosslinked and weak-crosslinked zones that undergo degradation under physiological conditions [ 15 , 16 , 17 ]. To eliminate these problems in alginate hydrogels, a covalent cross-linking strategy can be applied.…”

Section: Introductionmentioning

confidence: 99%

Highly Effective Covalently Crosslinked Composite Alginate Cryogels for Cationic Dye Removal

Sezen

Thakur

Ozmen

2021

Gels

Self Cite

View full text Add to dashboard Cite

Currently, macroporous hydrogels have been receiving attention in wastewater treatment due to their unique structures. As a natural polymer, alginate is used to remove cationic dyes due to its sustainable features such as abundance, low cost, processability, and being environmentally friendly. Herein, alginate/montmorillonite composite macroporous hydrogels (cryogels) with high porosity, mechanical elasticity, and high adsorption yield for methylene blue (MB) were generated by the one-step cryogelation technique. These cryogels were synthesized by adding montmorillonite into gel precursor, followed by chemical cross-linking employing carbodiimide chemistry in a frozen state. The as-prepared adsorbents were analyzed by FT-IR, SEM, gel fraction, swelling, uniaxial compression, and MB adsorption tests. The results indicated that alginate/montmorillonite cryogels exhibited high gelation yield (up to 80%), colossal water uptake capacity, elasticity, and effective dye adsorption capacity (93.7%). Maximum adsorption capacity against MB was 559.94 mg g−1 by linear regression of Langmuir model onto experimental data. The Pseudo-Second-Order model was fitted better onto kinetic data compared to the Pseudo-First-Order model. Improved porosity and mechanical elasticity yielding enhanced dye removal capacity make them highly potential alternative adsorbents compared to available alginate/montmorillonite materials for MB removal.

show abstract

Section: Introductionmentioning

confidence: 99%

Highly Effective Covalently Crosslinked Composite Alginate Cryogels for Cationic Dye Removal

Sezen

Thakur

Ozmen

2021

Gels

Self Cite

View full text Add to dashboard Cite

show abstract

“…Carbon based materials, such as graphite and graphene, including their polymer composites, have been reported to play a significant role in a number of applications, from water treatment to structural composites [23][24][25][26][27][28]. In this work, the tert-Butyl Acrylate with diethylene glycol diacrylate, a shape memory polymer, was produced by 4D printing and the parameters were optimized using a multi-objective optimization technique.…”

Section: Discussionmentioning

confidence: 99%

4D Printing of Smart Polymer Nanocomposites: Integrating Graphene and Acrylate Based Shape Memory Polymers

et al. 2021

Self Cite

View full text Add to dashboard Cite

The ever-increasing demand for materials to have superior properties and satisfy functions in the field of soft robotics and beyond has resulted in the advent of the new field of four-dimensional (4D) printing. The ability of these materials to respond to various stimuli inspires novel applications and opens several research possibilities. In this work, we report on the 4D printing of one such Shape Memory Polymer (SMP) tBA-co-DEGDA (tert-Butyl Acrylate with diethylene glycol diacrylate). The novelty lies in establishing the relationship between the various characteristic properties (tensile stress, surface roughness, recovery time, strain fixity, and glass transition temperature) concerning the fact that the print parameters of the laser pulse frequency and print speed are governed in the micro-stereolithography (Micro SLA) method. It is found that the sample printed with a speed of 90 mm/s and 110 pulses/s possessed the best batch of properties, with shape fixity percentages of about 86.3% and recovery times as low as 6.95 s. The samples built using the optimal parameters are further subjected to the addition of graphene nanoparticles, which further enhances all the mechanical and surface properties. It has been observed that the addition of 0.3 wt.% of graphene nanoparticles provides the best results.

show abstract

“…Basically, hydrogels are defined as a unique class of three-dimensional cross-linked polymeric networks which possess the ability to retain a large amount of either aqueous solvent or biological fluids within their structures [ 2 ]. Their swelling ability, pH sensitivity, and temperature and/or other stimuli responsiveness represent some special properties of this class of materials which can be exploited in a wide range of technological applications [ 3 , 4 ]. For instance, the literature reports many studies where hydrogels can be applied in agriculture, pharmaceuticals, drug delivery systems, tissue engineering, food additives, diagnostics, biosensors, wound dressings, etc., [ 5 , 6 , 7 , 8 , 9 , 10 ].…”

Section: Introductionmentioning

confidence: 99%

Printable Hydrogels Based on Alginate and Halloysite Nanotubes

Cavallaro

Lisuzzo

Lazzara

et al. 2022

IJMS

View full text Add to dashboard Cite

The design of hydrogels for the controlled release of active species is an attractive challenge. In this work, we prepared hybrid hydrogels composed of halloysite nanotubes as the inorganic component, and alginate as the organic counterpart. The reported procedure allowed us to provide the resulting materials with a peculiar wire-like shape. Both optical and scanning electron microscopy were used to characterize the morphological properties of the hydrogel wires, whose diameters were ca. 0.19 and 0.47 mm, respectively. The possibility to be exploited as drug delivery systems was carried out by loading the nanoclay with salicylic acid and by studying the release profiles. Thermogravimetric experiments showed that the amount of encapsulated drug was 4.35 wt%, and the salicylic acid was thermally stabilized after the loading into the nanotubes, as observed by the shift of the degradation peak in the differential thermograms from 193 to 267 °C. The kinetics investigation was conducted using UV–Vis spectrophotometry, and it exhibited the profound effects of both the morphology and dimensions on the release of the drugs. In particular, the release of 50% of the payload occurred in 6 and 10 h for the filiform hydrogels, and it was slower compared to the bare drug-loaded halloysite, which occurred in 2 h. Finally, an induction period of 2 h was observed in the release profile from the thicker sample.

show abstract

Cellulosic biomass-based sustainable hydrogels for wastewater remediation: Chemistry and prospective

Cited by 92 publications

References 178 publications

Highly Effective Covalently Crosslinked Composite Alginate Cryogels for Cationic Dye Removal

Highly Effective Covalently Crosslinked Composite Alginate Cryogels for Cationic Dye Removal

4D Printing of Smart Polymer Nanocomposites: Integrating Graphene and Acrylate Based Shape Memory Polymers

Printable Hydrogels Based on Alginate and Halloysite Nanotubes

Contact Info

Product

Resources

About