Ionic crosslinking strategies for poly(acrylamide) /alginate hybrid hydrogels

Houben, Sofie; Pitet, Louis M.

doi:10.1016/j.reactfunctpolym.2023.105676

Cited by 10 publications

(2 citation statements)

References 36 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Cross-linking by ionic interaction refers to the process of forming cross-links between ionically bonded side groups on linear or branched organic polymer chains through ion-bonded interactions . For instance, alginate which contains β- d -mannuronic acid and α- l -guluronic acid residues, can undergo cross-linking with various divalent cations such as calcium (Ca 2+ ), magnesium (Mg 2+ ), barium (Ba 2+ ), strontium (Sr 2+ ), manganese (Mn 2+ ), and aluminum (Al 3+ ). − Houben et al prepared dual-network hydrogels by introducing divalent cations into a polyacrylamide/alginate polymer system. The findings demonstrate that the degree of cross-linking in the prepared gel increases proportionally to the ionic radius (Ba 2+ > Sr 2+ > Ca 2+ ) due to its stronger affinity toward guluronic acid residues in alginate.…”

Section: Synthesis Mechanism and Preparation Methods Of Hydrogelsmentioning

confidence: 99%

Rational Design of a Multifunctional Hydrogel Trap for Water and Fertilizer Capture: A Review

Wu,

Sheng,

et al. 2024

J. Agric. Food Chem.

View full text Add to dashboard Cite

Water scarcity and land infertility pose significant challenges to agricultural development, particularly in arid and semiarid regions. Improving soil-water-retention capacity and fertilizer utilization efficiency through the application of soil additives has become a pivotal approach in agricultural practices. Hydrogels exhibit exceptional water absorption and fertilizer retention capabilities, making them extensively utilized in the fields of agriculture, forestry, and desert control. Currently, most reviews primarily focus on the raw materials, classification, synthesis methods, and application prospects of hydrogels, with limited attention given to strategies for enhancing water-retention performance, mechanisms underlying fertilizer absorption, and environmental risks. This review covers the commonly used cross-linking methods in hydrogel synthesis and the structure−activity relationship between hydrogels and water as well as fertilizer. Additionally, a thorough analysis of the ecological benefits and risks associated with hydrogels is presented. Finally, future prospects and challenges are delineated from the perspectives of material design and engineering applications.

show abstract

Section: Synthesis Mechanism and Preparation Methods Of Hydrogelsmentioning

confidence: 99%

Rational Design of a Multifunctional Hydrogel Trap for Water and Fertilizer Capture: A Review

Wu,

Sheng,

et al. 2024

J. Agric. Food Chem.

View full text Add to dashboard Cite

show abstract

“…After filling the mold, the combined solution was sealed, and DC-PNIPAm hydrogel was obtained. After polymerization, DC-PNIPAm gel was submerged in SA solution and CaCl 2 to create DCS-PNIPAm gel 30. 3.2.…”

mentioning

confidence: 99%

Robust and Elastic Thermoresponsive Hydrogels with High Swelling Properties for Efficient Solar Water Purification

Cui,

Wu,

Wang

et al. 2024

ACS Appl. Polym. Mater.

View full text Add to dashboard Cite

A viable and long-term method for producing clean water at hydrogel interfaces is solar-driven evaporation. This research utilizes the microgel polymerization technique to fabricate DCS-PNIPAm gels that exhibit exceptional swelling capacity and mechanical qualities. Electrostatic forces and hydrogen bonds between molecules occur between the sulfonic acid anions and ammonium cations inside the P(NIPAm-co-DMAPS) chains. Alginate is characterized by a high content of carboxyl and hydroxyl groups, which facilitate the establishment of hydrogen bonding and electrostatic interactions within the P(NIPAm-co-DMAPS) system. Semi-interpenetrating networks are formed in the hydrogel as a result of physical and chemical cross-linking brought on by these interactions. Consequently, the hydrogel's mechanical characteristics and swelling capacity were significantly enhanced, and the water-collecting rate of DCS-PNIPAm reached up to 9.32 kg m −2 h −1 under one sun irradiation. Notably, the sodium alginate (SA) and carbon nanotubes (CNTs) layer of the DCS-PNIPAm gel has excellent filtration properties, which can make it possible to use sunlight to purify water from various contaminated water sources containing dyes, oils, and metals.

show abstract

A Versatile and High‐Resolution Hydrogel Platform for Volumetric Additive Manufacturing Based on Poly(ethylene glycol) Diacrylate and Alginate Blends

Hall,

Chasko,

Wheeler

et al. 2024

Adv Materials Technologies

View full text Add to dashboard Cite

Volumetric additive manufacturing (VAM) has emerged as a potent method for fabricating complex structures out of soft materials such as hydrogels. In this study, a low‐cost photopolymer platform is developed based on low molecular weight poly (ethylene glycol) diacrylate (PEGDA) and alginate (Alg) blends which reduces material costs ≈1000x. By adding non‐crosslinked 0.5 wt.% of Alg to these 5, 10, or 15 wt.% PEGDA precursor solutions, the viscosity is raised from <1 mPa*s to 50 mPa*s, which enables VAM of low molecular weight PEGDA. The fabricated hydrogels have customizable mechanical properties, ranging from 14 ± 4 kPa to 90 ± 24 kPa, and 289 ±121 kPa and correspond to equilibrium water contents of 96.8 ± 0.3%, 91.2% ± 0.8% and 84.1% ± 0.9%. The printed structures have minimum feature sizes ranging between 56 ± 9 µm for 5 wt.% PEGDA + 0.5 wt.% Alg, 47 ± 12 µm for 10 wt.% PEGDA + 0.5 wt.% Alg, and 39 ± 7 µm for 15 wt.% PEGDA + 0.5 wt.% Alg. Additionally, these materials are printable into designs with internal voids, unsupported struts, and interlocked features. This work establishes a low cost, mechanically tunable hydrogel platform for VAM which can improve accessibility and adoption.

show abstract

Ionic crosslinking strategies for poly(acrylamide) /alginate hybrid hydrogels

Cited by 10 publications

References 36 publications

Rational Design of a Multifunctional Hydrogel Trap for Water and Fertilizer Capture: A Review

Rational Design of a Multifunctional Hydrogel Trap for Water and Fertilizer Capture: A Review

Robust and Elastic Thermoresponsive Hydrogels with High Swelling Properties for Efficient Solar Water Purification

A Versatile and High‐Resolution Hydrogel Platform for Volumetric Additive Manufacturing Based on Poly(ethylene glycol) Diacrylate and Alginate Blends

Contact Info

Product

Resources

About