Multicomponent biodegradable hydrogels based on natural biopolymers as environmentally coating membrane for slow-release fertilizers: Effect of crosslinker type

Jungsinyatam, Patchareepon; Suwanakood, Pitchayaporn; Saengsuwan, Sayant

doi:10.1016/j.scitotenv.2022.157050

Cited by 36 publications

(46 citation statements)

References 56 publications

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“…The feature spectral band of the -CH 2 asymmetric stretching vibration was found at 2934 cm −1 . In particular, a sharp and strong band near 1700 cm −1 corresponded with the characteristic band of carbonyl (C=O); 1557 cm −1 was the characteristic spectral band of the seco-amide-conjugate, and 1450 and 1404 cm −1 were those of the -CO bending vibration [ 41 , 42 , 43 , 44 ]. Based on SEM and FTIR results, we determined the successful synthesis of a polyacrylate polymer.…”

Section: Resultsmentioning

confidence: 99%

Highly Efficient Hemostatic Cross-Linked Polyacrylate Polymer Dressings for Immediate Hemostasis

Ye,

Yang,

Hao

et al. 2024

Polymers

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A traumatic hemorrhage is fatal due to the great loss of blood in a short period of time; however, there are a few biomaterials that can stop the bleeding quickly due to the limited water absorption speed. Here, a highly absorbent polymer (HPA), polyacrylate, was prepared as it has the best structure–effectiveness relationship. Within a very short period of time (2 min), HPA continually absorbed water until it swelled up to its 600 times its weight; more importantly, the porous structure comprised the swollen dressing. This instantaneous swelling immediately led to rapid hemostasis in irregular wounds. We optimized the HPA preparation process to obtain a rapidly water-absorbent polymer (i.e., HPA-5). HPA-5 showed favorable adhesion and biocompatibility in vitro. A rat femoral arteriovenous complete shear model and a tail arteriovenous injury model were established. HPA exhibited excellent hemostatic capability with little blood loss and short hemostatic time compared with CeloxTM in both of the models. The hemostatic mechanisms of HPA consist of fast clotting by aggregating blood cells, activating platelets, and accelerating the coagulation pathway via water absorption and electrostatic interaction. HPA is a promising highly water-absorbent hemostatic dressing for rapid and extensive blood clotting after vessel injury.

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Section: Resultsmentioning

confidence: 99%

Highly Efficient Hemostatic Cross-Linked Polyacrylate Polymer Dressings for Immediate Hemostasis

Ye,

Yang,

Hao

et al. 2024

Polymers

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“…The copolymer (CSt‐g‐PAA/NR/PVA, CSB semi‐IPN hydrogel) was semi‐interpenetrated and used as a coating film for slow‐release urea fertilizer. After coating the urea pellets with CSB hydrogel and wax layer (UCSBw formulation), the urea release rates of UCSBw‐M2, UCSBw‐E2 and UCSBw‐G2 formulations were 67.7%, 68.7%, and 78.3%, respectively, within 30 days 49 . Based on these urea release systems, the initial nutrient release rates of PM‐SRF and PML‐SRF were found to be ≤10%, and the cumulative nutrient release rates at day 28 were 75.73% and 59.51%, respectively, with lower release rates compared to the control release systems, and cumulative release rates ≥80%, which were smoother compared to the control release systems, probably due to the outer LPA water retention agent and the different production process.…”

Section: Resultsmentioning

confidence: 99%

Engineering and slow‐release properties of lignin‐based double‐layer coated fertilizer

Wang

Zhang

et al. 2023

Polymers for Advanced Techs

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Chemical fertilizer has become a necessary condition for increasing the production and income of agricultural products in modern agriculture. However, excessive fertilization and fertilizer leakage could cause environmental pollution. To improve the utilization rate of agricultural fertilizers and reduce environmental pollution, the degradability of slow-release fertilizers (SRFs) has become a research hotspot. In this work, a double-layer coating material of slow-release fertilizer was fabricated using low-cost polyvinyl alcohol (PVA) and methylcellulose (MC) as the inner coating mate-

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“…Figure 4B involved the decomposition of the main chain of the graft copolymers, as well as the three-dimensional network structure. 5,21,22 Furthermore, the analysis revealed that the T d,max values within the first primary stage (refer to the inset) of the semi-IPN hydrogels followed a sequence: CSt-g-PAM/ NRG (271 C) < CSt-g-PAA/NRG (283 C). This finding suggests that the CSt-g-PAA/NRG system exhibited superior thermal stability compared to CSt-g-PAM/NRG, aligning well with the results from XRD and water swelling assessments.…”

Section: Xrd Analysis and Thermal Stabilitymentioning

confidence: 97%

“…Generally, hydrophilic polymers play a crucial role in improving water absorption and modifying the physical, morphological, and mechanical properties of polymers. 36 To enhance the swelling capabilities of starch-based hydrogels, the modification of starch with highly hydrophilic monomers like AA 20,21 and AM 22,37 is necessary, given their popularity in enhancing hydrogel water absorption. This study aims to explore the suitability of AA or AM monomers for grafting onto CSt, optimizing Initially, sulfate anion radicals (SO4•-) generated by APS abstract H atoms from the OH groups on the CSt backbones, leading to the creation of CSt macroradicals (CSt-O•).…”

Section: Fabrication Of Cst-g-paa/nrg and Cst-g-pam/nrg Semi-ipn Hydr...mentioning

confidence: 99%

“…In our CSt/NR system, NR was employed to enhance the flexibility of the CSt-based hydrogel. 5,[20][21][22] To improve NR's compatibility with other polar polymers, it is frequently modified by grafting with glycidyl methacrylate (GMA), resulting in NR-g-GMA (NRG), a technique commonly employed in various research. 17,23,24 GMA is a polar monomer with polar characteristics that can participate in several chemical reactions, such as hydrolysis with a strong base like KOH, resulting in the ring opening of its epoxy group, increasing its polarity and hydrophilicity.…”

Section: Introductionmentioning

confidence: 99%

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Preparation and characterization of hydrogels based on glycidyl methacrylate (GMA)‐grafted NR and modified cassava starch as eco‐friendly materials for sustainable agriculture

Panpinit,

Salairam,

Jumpapaeng

et al. 2024

Polymer Engineering & Sci

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Eco‐friendly hydrogel was developed using natural rubber latex (NR) and cassava starch (CSt) through grafting modifications to enhance their swelling and water retention by selecting suitable grafting components and improving compatibility. To improve its hydrophilicity and compatibility with CSt, NR was grafted with glycidyl methacrylate (NR‐g‐GMA, NRG). Subsequently, CSt was grafted with acrylic acid (AA) and acrylamide (AM), crosslinked with N,N′‐methylene‐bis‐acrylamide (MBA), and ultimately interpenetrated by NRG to produce CSt‐g‐PAA/NRG and CSt‐g‐PAM/NRG hydrogels, respectively. The obtained hydrogels were characterized by various techniques. Results revealed that CSt‐g‐PAM/NRG exhibited exceptional equilibrium water swelling (Seq) at 2413%, surpassing CSt‐g‐PAA/NRG (416%), and CSt/NR (146%). This was attributed to the synergistic effects of the improved NR polarity and compatibility, the looser structures, the higher rate constant of water swelling (20.06%/s), and the greater compatibility between compositions compared to the CSt‐g‐PAA/NRG system. Therefore, AM was the suitable grafting monomer for the CSt/NRG hydrogel system. Also, the CSt‐g‐PAM/NRG hydrogel exhibited remarkable water retention for up to 30 days with excellent biodegradation (55%) and good biosafety. This study demonstrates a promising strategy for improving swelling capacity (~1600%) and water retention (58%) of biodegradable CSt/NR hydrogels as a low‐cost coating membrane for sustainable agriculture.Highlights Boost of NR hydrophilicity and compatibility via GMA grafting to generate NRG. Fabrication of CSt‐g‐PAA/NRG and CSt‐g‐PAM/NRG hydrogels by semi‐IPN technique. CSt‐g‐PAM/NRG swelling showed a significant improvement over CSt‐g‐PAA/NRG. AM was the suitable grafting monomer for the CSt/NRG hydrogel system. CSt‐g‐PAM/NRG showed good biodegradability and water retention for agriculture.

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Multicomponent biodegradable hydrogels based on natural biopolymers as environmentally coating membrane for slow-release fertilizers: Effect of crosslinker type

Cited by 36 publications

References 56 publications

Highly Efficient Hemostatic Cross-Linked Polyacrylate Polymer Dressings for Immediate Hemostasis

Highly Efficient Hemostatic Cross-Linked Polyacrylate Polymer Dressings for Immediate Hemostasis

Engineering and slow‐release properties of lignin‐based double‐layer coated fertilizer

Preparation and characterization of hydrogels based on glycidyl methacrylate (GMA)‐grafted NR and modified cassava starch as eco‐friendly materials for sustainable agriculture

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