Frontal polymerization of superabsorbent nanocomposites based on montmorillonite and polyacrylic acid with enhanced soil properties

Zhang, Ruobing; Qiu, Zhaoxia; Qiu, H.; Zhang, Xionghui

doi:10.1002/app.39825

Cited by 12 publications

(14 citation statements)

References 33 publications

(46 reference statements)

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“…As a fast and efficient polymerization model, frontal polymerization (FP) has received special attention because it can rapidly produce a variety of functional polymers and polymeric networks toward unique applications, including soft contact lenses, sensors, controlled drug delivery materials, tissue engineering, wound dressing, diagnostics, and soft robots . Particularly, FP has been broadly employed to produce various hydrogels such as starch‐graft‐poly(acrylic acid) hydrogels, porous polyacrylamide hydrogels, poly( N,N ‐dimethylacrylamide) hydrogels, superabsorbent hydrogels, graphene‐containing stimuli‐responsive polymer hydrogels, functional hybrid composite hydrogels, amphiphilic hydrogels, N ‐vinylimidazole‐based hydrogels, and interpenetrating polymer networks hydrogels . However, there are few reports on the investigation of hydrogels derived from FP for the removal of heavy metals.…”

Section: Introductionmentioning

confidence: 99%

Facile synthesis of poly(DMC‐co‐HPA) hydrogels via infrared laser ignited frontal polymerization and their adsorption–desorption switching performance

Yang

Wang

et al. 2015

J. Polym. Sci. Part A: Polym. Chem.

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In this work, we report a versatile infrared laser ignited frontal polymerization technique for the fabrication of a series of poly(DMC-co-HPA) hydrogels (DMC 5 methacryloxyethyltrimethyl ammonium chloride, HPA 5 hydroxypropyl acrylate). Because the method is based on the exothermic reaction, no further energy is required in the reaction once it is initiated. Moreover, we have found the polymerization process is a pure frontal polymerization model without involving any other reaction process. The dependence of frontal velocity and temperature on the reaction time is thoroughly discussed. The asprepared hydrogels are pH-responsive and their maximum equilibrium swelling ratio could reach $3,890%. Also, the asprepared poly(DMC-co-HPA) hydrogels capable of adsorption/ desorption switching performance can be utilized for heavy metal ion removal in wastewater treatments. Interestingly, the hydrogels can float on the water surface after intaking heavy metal ions by the combination of kerosene and polyoxyethylene sorbitan monolaurate (Tween 20) in hydrogel components, greatly enhancing treatment efficiency. We believe the method described herein to rapidly construct functional hydrogels with the ability to remove heavy metal ions may find unique applications in emergency processing of water pollution.

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Section: Introductionmentioning

confidence: 99%

Facile synthesis of poly(DMC‐co‐HPA) hydrogels via infrared laser ignited frontal polymerization and their adsorption–desorption switching performance

Yang

Wang

et al. 2015

J. Polym. Sci. Part A: Polym. Chem.

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“…Superabsorbent hydrogel (SAP) usually are used as soil conditioners and chemical formulations in agriculture to maintain soil moisture and enhance the pesticide efficiency 17 . However, some research showed when pesticides coexisted with SAP, the environmental fate and transformation of pesticides could be changed, especially for bound residue 12,13,18 .…”

Section: Discussionmentioning

confidence: 99%

Phytoavailability of bound residue of Carbendazim to Chinese cabbage (Brassica campestris ssp.chinensis) coexisted with Superabsorbent polymers

Yang

Wang

et al. 2020

Sci Rep

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Understanding the bioavailability and phytotoxicity of carbendazim (MBc) bound residues (BR) in soils incubated with different Superabsorbent polymer (SAP) amendment on succeeding crops is essential to assess their environmental fate and risks. in our research, we studied the morphological characteristics and 14 c-accumulation of chinese cabbage and released BR in three typical cultivated soils. the plant dry weight was in order of superabsorbent-hydrogels formulations (HMBc) > MBc > MBC and SAP (MBC-SAP) at 35 d in basic soil 3 (S3), with 675.40 ± 29.07 mg/plant.d.w, 575.93 ± 25.35 mg/plant.d.w and 427.86 ± 18.79 mg/plant.d.w. The whole plant accumulated 2-fold more BR when grew in neutral soil 2 (S2) treated with SAP than MBC at 7 d. The root accumulated a greater proportion of 14 c-MBc residue than shoot, with order of MBC-SAP > MBc > HMBC at 21d. The results indicate MBC-BR could be released and accumulated in plant. HMBc promoted the chinese cabbage growth with lowest 14 c accumulation, while MBC-SAP inhibited plant growth with the highest 14 c uptake. the released BR rate was 61.43 ± 3.75% of initial BR in MBC-SAP, with 2-fold higher than MBC and HMBC. It is assumed HMBc could be a potential environmentally friendly measure for rational use of pesticides in future. Pesticides are ubiquitous chemicals in the environment, and are usually used to control crop disease and maintain the products. When pesticides are applied to the field and undergo degradation, their metabolites and they could bind to organic or mineral constituents of soil, and form the non-extractable residue (bound residue) in soil 1. Bound residue (BR) is generally regarded as the soil detoxification process, which involves chemicals could permanently bind to soil matrix, and are no longer bioavailable and bio-accessible to organisms. However, some studies reported that BR could be released via microbial activity and physic-chemical mechanism, and accumulated in living tissues and food webs, posing high threat to human health 2. Han et al. found 14 C-labeled residue of ZJ0273 was released from the BR-amended soil upon planting, and rice seedling took up the 14 C from soil contaminated with compound residues and was inhibited to grow 3. Gao et al. detected a clear uptake, accumulation and translocation of phenanthrene and pyrene by ryegrass, and significant phytoavailabilty of bound-PAH residue 4. Liu et al. also demonstrated that the earthworms accumulated 31.5% of the total radioactivity 14 C-BR-RM 5 after exposure to the BRs of 14 C-CYC. Thus, the food safety issue of agricultural products originated from contaminated soils should be given a public concern. The potential release, bioaccumulation and phytotoxicity of the BR to succeeding non-target organism are always important topics for understanding the environment and human food safety impact of pesticides. Soils are the vital resources that provide life-supporting services of food production, water cleaning and habits for human and wildlife. Intensified agricultural production has deter...

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“…Our group has prepared polyacrylic acid (PAA)/MMT/sodium carboxymethyl cellulose (CMC) superabsorbent nanocomposite via FP. Compared with BP, the product showed better salt resistance, thermal stability, and large size and number of soil water stable macro‐aggregates . But when MMT content exceeds 5 wt%, the propagating front could not be sustained and it is not conducive to lower production costs if MMT content is low.…”

Section: Introductionmentioning

confidence: 98%

Frontal polymerization of superabsorbent polymers based on vermiculite with slow release of urea

Yuan

Qiu

et al. 2016

Polymer Engineering & Sci

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Poly(acrylic acid-co-acrylamide)/sodium carboxymethyl cellulose/vermiculite (VMT) superabsorbent polymers (SAPs) were prepared by frontal polymerization (FP), a kind of polymerization model characterized by short reaction times and low-energy consumption. The effects of VMT content and monomer ratios on frontal parameters and water absorbency were investigated. Due to the good heat insulation property of VMT, the propagating front still sustained at high VMT concentrations (over 30%). The preparation of SAPs with high VMT-loading via FP has advantages of low energy consumption and low materials prices, decreasing the cost of SAPs effectively. SAPs with slow-release fertilizer (SSRF) were obtained by embedding urea into their networks during the FP process. The addition of urea not only endows SAPs with slow release function of urea (more than 30 days in soil), but also increases their water absorbency (by 17.4%). The effects of obtained SSRF on tall fescue seeds germination and growth were studied. Compared with the control group, the germination rate and vigor index of tall fescue seeds applied SSRF with 10% urea increased by 17.5 and 80.2%, respectively. POLYM. ENG. SCI., 57:69-77, 2017.

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Frontal polymerization of superabsorbent nanocomposites based on montmorillonite and polyacrylic acid with enhanced soil properties

Cited by 12 publications

References 33 publications

Facile synthesis of poly(DMC‐co‐HPA) hydrogels via infrared laser ignited frontal polymerization and their adsorption–desorption switching performance

Facile synthesis of poly(DMC‐co‐HPA) hydrogels via infrared laser ignited frontal polymerization and their adsorption–desorption switching performance

Phytoavailability of bound residue of Carbendazim to Chinese cabbage (Brassica campestris ssp.chinensis) coexisted with Superabsorbent polymers

Frontal polymerization of superabsorbent polymers based on vermiculite with slow release of urea

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