JACS Au
·
2024
·
IF 8.5
Bin Li,Ludi Wang,Yu Kang,Hong Cao,Yaoyang Liu,Qiange He,Zhongfeng Li,Xiaoyan Tang,Jing Chen,Li Wang,Chao Xu
Hydrophilic actinide masking agents are believed to be efficient alternatives to circumvent the extensive hazardous organic solvents/diluents typically employed in the liquid–liquid extraction for nuclear waste management. However, the practical application of hydrophilic ligands faces significant challenges in both synthetic/purification procedures and, more importantly, the acid resistance of the ligands themselves. Herein, we have demonstrated the combination of phenanthroline diimide framework with a biomotif of histidine flanking parts could achieve efficient separation of trivalent lanthanides/actinides (also actinides/actinides) under high acidity of over 1 M HNO3. This approach leverages the soft–hard coordination properties of N, O-hybrid ligands, as well as the energetically favored imides for metal coordination and the multiple protonation of histidine. These factors collectively contribute to the synthesis of an easily accessible, highly water-soluble, superior selective, and acid-resistant Am(III) masking agent. Thus, we have shown in this paper, by proper combination of synthetic N, O-hybrid ligand with amino acid, trivalent lanthanide and actinide separation could be efficiently fulfilled in a more sustainable manner.
研究领域:
核化学与放射化学
·
环境科学
·
配位化学
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DOI
PubMed
高影响因子
RUSSIAN JOURNAL OF APPLIED CHEMISTRY
·
2017
·Vol. 90
·期 3
·480-491
·
IF 0.375
Lai Nanjun,Li Shitao,Liu Lu,Li Yanxiang,Li Jun,Zhao Maoyue
In this study, various modified nano-SiO 2 functional monomers (nano-SiO 2 -KH540-MAH) were prepared and reacted with acrylamide (AM) and acrylate (AA) to synthesize a water-soluble hyperbranched copolymer (nano-SiO 2 /AM/AA) for medium- and low-permeability reservoirs and heterogeneous reservoirs by using the redox free-radical polymerization strategy. The HCl‒CH 3 CH 2 OH titration expectedly demonstrated that the monomers underwent a controlled modification. The copolymers were characterized by a series of experiments, including IR, 1 H NMR and DLS methods. Furthermore, it was shown that, compared with the rheological properties of various modified copolymers, Polymer-40 has a better viscosity and elasticity due to the better molecular structure. An indoor displacement test demonstrated that the mobility control ability and the EOR ability had a favorite relationship with rheology. The RF, RRF and EOR of Polymer-40 were higher than the same parameters of other modified copolymers.
研究领域:
石油工程
·
材料科学
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DOI
高影响因子
POLYMER
·
2017
·
IF 3.684
Jia-Min Li,Chuan-Shan Hu,Jian-Ming Shao,Hui-Juan Li,Peng-Yun Li,Xi-Chuan Li,Wei-Dong He
Ternary hydrogels composed of poly[acrylamide- co -2-(dimethylamino)ethyl methacrylate] [P(AM- co -DMAEMA)], poly(vinyl alcohol) (PVA) and β -cyclodextrin ( β -CD) were fabricated based on the multiple physical interactions such as inclusion complexation, hydrogen bonding and polymer crystallinity , and exhibited high storage modulus . To illustrate the individual role of each physical interaction, symmetrical investigation has been performed. P(AM- co -DMAEMA)s with two compositions , prepared by radical polymerization at −20 °C below the freezing point of reaction medium of water, were served as the inclusion guest for the inclusion host of β -CD. The inclusion complex between dimethylaminoethyl group of DMAEMA and β -CD was identified through 2D NOESY NMR spectroscopy . Hydrogen bonding between each pairs of hydrogel components was confirmed with FTIR analysis and contributed the second form of crosslinkage. Under freezing polymerization and further freezing-thawing treatment, PVA component tended to crystallize to serve as the third type of physical crosslinkage, which was recognized with X-ray diffraction. Rheological and thermo-gravimetrical analysis was used to inspect the modulus and thermal stability of the hydrogels, respectively. Three hydrogels of P(AM- co -DMAEMA)/PVA-g- β -CD, P(AM- co -DMAEMA)/PVA/ β -CD and P(AM- co -DMAEMA)/PVA were synthesized under the same condition to make the comparison. The whole results disclosed the strong dependence of hydrogel properties on the hydrogel components, reflecting the synergistic effects of different physical crosslinkages for the formation of those physical hydrogels.
研究领域:
材料科学
·
高分子化学
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DOI
高影响因子
CHEMISTRY AND TECHNOLOGY OF FUELS AND OILS
·
2024
·Vol. 60
·期 2
·309-314
·
IF 0.6
Liu Tianyu,Ye Zhongbin,Liu Dong
Utilizing emulsion polymerization, a microcapsule breaker with a polystyrene-polyacrylamide core-shell structure was synthesized. Ammonium persulfate served as the breaker, polystyrene as the shell, and polyacrylamide as the drug-carrying agent. The results demonstrated that the synthesized microencapsulated gel-breaker exhibited a uniform spherical shape, superior water dispersion, and enhanced thermal stability. Conductivity tests indicated that the core-shell structure of the microcapsules effectively regulated the release of ammonium persulfate as a gel-breaking agent, resulting in delayed polymer gel-breaking.
研究领域:
材料科学
·
化学工程
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DOI
高影响因子
POLYMER ENGINEERING AND SCIENCE
·
2026
·
IF 3.6
Hang Shu,Tao Li,Jiating Liu,Yi Chen
In the field of advancing flexible sensor technologies, achieving both high conductivity and mechanical flexibility in hydrogel materials remains a critical challenge. To address this issue, a flexible conductive gel based on a synergistic P(AM-AMPS)-PVP network (PAAP) was developed. Through the formation of a hydrogen-bonding network and continuous ion transport pathways, the gel achieves a balanced improvement in electrical conductivity and mechanical flexibility. The resulting PAAP gel exhibits an exceptional tensile strain capacity of up to 1811%, notable ionic conductivity (59.41 mS/cm), and a very low elastic modulus (< 10 kPa), indicating strong structural resilience and adaptability under strain. These characteristics make the gel particularly suitable for use in flexible strain sensing and Morse code signal recognition. When integrated with a support vector machine (SVM) classification model, the system enables precise identification of “dot-dash” signal patterns, achieving classification accuracy exceeding 95%. This work provides a promising approach and theoretical basis for the development of flexible hydrogels in intelligent sensing, information decoding, and wearable communication technologies. Highlights A stretchable, soft, and conductive P(AM-AMPS)-PVP hydrogel for sensing. Integration of SVM enables intelligent signal recognition and interfacing. The SVM achieves a high accuracy in recognizing dot-dash signal patterns.
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产品关联
DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
·
2025
·Vol. 36
·期 31
·1-22
·
IF 2.8
Guo Yiting,Hao Jingyi,Wang Tian,Su Shen,Yang Shuangshuang,Wang Xingwei,Yu Qiangliang
To investigate the electromagnetic wave absorption performance of electromagnetic-regulated materials and copolymerized composite aerogels with polymer materials, this study loaded nano-Fe 3 O 4 onto modified CNTs through a hydrothermal reaction. The resulting material was then added to a prepolymer solution of acrylic acid and acrylamide monomers for copolymerization, followed by the preparation of composite aerogels using freeze-drying technology (Fe 3 O 4 -CNTs/P(AA-AM)). The influence of the addition amount of nano-Fe 3 O 4 -loaded modified CNTs on the electromagnetic wave absorption performance of the composite aerogels was systematically studied. Notably, the Fe 3 O 4 -CNTs/P(AA-AM)-5 aerogel exhibited the optimal wave-absorbing performance, achieving a minimum reflection loss of −35.5 dB and an effective absorption bandwidth of 5.04 GHz below −10 dB. This is primarily attributed to the excellent dual electromagnetic loss of Fe 3 O 4 -CNTs and the multiple reflection, polarization, and relaxation processes induced by the three-dimensional conductive network constructed within the aerogel skeleton. The performance relationships revealed in this study are of significant importance for the design and preparation of polymer aerogels with effective electromagnetic wave absorption capabilities.
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产品关联
DOI
高影响因子
Polymers
·
2019
·Vol. 11
·期 12
·
IF 3.164
Tingting Chen,Xingqin Fu,Luzi Zhang,Yuejun Zhang
The poly(acryloyloxyethyl trimethyl ammonium chloride–co–acrylamide), P(DAC-AM), is a kind of cationic polyelectrolyte usually applied in a solution form, and its performance is affected by its structure and the environment where it is used. In particular, its viscosity properties in salt solutions are directly related to its efficacy in various applications, and the performance is one of the most important solution properties. Therefore, in this paper, the effects of the salt concentration and valence of seven kinds of inorganic salts, NaCl, LiCl, KCl, MgCl2, AlCl3, Na2SO4, and Na3PO4, on the values of apparent viscosity (ηa) of P(DAC-AM) samples with cationicity of 10%, 50%, and 90%, and intrinsic viscosity ([η]) of 5, 10, and 15 dL/g were investigated. Theηawas determined using a rotational viscometer. The interaction mechanism between the polymers and salt ions was also investigated. The results showed that depending on the salt concentration, theηafirstly decreased sharply to the inflection point which indicated the minimum volume of the molecule shrinking, and then either maintained the value unchanged or increased. The salt concentration corresponding to the inflection point decreased with the increase of the salt ion valence but with the reduction of the cationicity of the polymer. Theηaat the inflection point increased as the [η] of the polymer grew. This indicated that the salt concentration and the salt ion valence had a notable impact on the stretch of the cationic polymer molecule in the salt solutions. It was discovered that the phenomenon of the increase of theηaof P(DAC-AM) samples in the multivalent salt solutions after the inflection point was caused by not only the increase of theηaof the complexes formed from the pure salts, but also the viscosity resistance of the charge and volume between the polymer molecules and salt ions, as well as the complexes themselves. The linear relationship between the increasedηaand the salt concentration, representing the interaction both among the complexes themselves and between the polymer and complexes, was obtained. Furthermore, the interaction model between the salt ions and P(DAC-AM) molecules in a wide range of salt concentrations was illustrated.
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DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2020
·
IF 6.182
Dongdong Zhang,Huanhuan Li,Jingjing Li,Ziang Xu,Haozhe Liu,Yiping Zhao,Xia Feng,Li Chen
Heavy metal are harmful to the mankind and difficult to observe in water, so it is necessary for the detection and removal of metal ions. Carbon dots (CDs) are novel fluorescent materials for detecting metal ions and their modified nanocomposites have great potential for water treatment applications. Our research is developing a dual material of detecting and adsorbing metal ions based on poly acrylamide-co-CD-co-2-acrylamido-2-methylpropanesulfonic acid (poly (Am-CD-AMPS)) by inverse miniemulsion polymerization. Firstly, CDs were functionalized with glycidyl methacrylate (GMA) to obtain double bond which can be stably immobilized into the microgels network during the polymerization. The prepared poly (Am-CD-AMPS) microgels demonstrated the blue fluorescent property and excitation-dependent behavior under UV light and Fluorescence spectrophotometer. The microgels had sensitivity toward Hg 2+ , Fe 3+ and Cu 2+ and detection limit as low as 2.3 nM, 3.2 μM and 1.3 μM. Meanwhile, poly (Am-CD-AMPS) microgels had adsorption capacity of 102.13 mg·g −1 and 85.00 mg·g −1 toward to Fe 3+ and Cu 2+ , and detailing of the possible mechanistic insight into the ion adsorption was also discussed. Reusability measurements showed that the synthesized microgels had the better stability in application of detecting and adsorbing metal ions.
研究领域:
环境科学
·
材料科学
✓ 已验证
DOI
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2019
·
IF 3.131
Jingqi Ji,Jianqing Zhao,Yangchuan Ke
In order to overcome the inherent defects of traditional polymer microspheres as plugging agent used in oilfields, including weak mechanical properties , low dispersity in water and poor adaptability to harsh conditions, an organo-modified montmorillonite (O-MMT) was incorporated to form an exfoliated structure in acrylamide/sodium 4-styrenesulfonate/2-acrylamido-2-methyl propane sulfonic acid (AM-SSS-AMPS) terpolymer matrix via in-situ polymerization. Such exfoliated structure not only exhibited a considerable enhancement in the comprehensive properties of nanocomposites , such as viscoelasticity , heat and shear-resistance, but also improved nanomechanical properties of microspheres. The results of nanomechanical properties showed that the energy dissipation and adhesion of nanocomposite with 3.0 wt% O-MMT were decreased to only 1.9% and 4.7% of those of the original terpolymer, respectively, implying the reduction in the agglomeration and energy consumption of microspheres in aqueous suspension. Rheology test demonstrated that the suspension (5.0 wt%) of nanocomposite microsphere with 2.0–3.0 wt% O-MMT behaved as pseudoplastic fluid, Newtonian fluid and dilatant fluid in turn at the shear rate from 10 s −1 to 1000 s −1 , which indicated a better arrangement of microspheres in suspension under shear stress. G′ and G′′ of the suspension of nanocomposite microspheres with 3.0 wt% O-MMT were 696.6 times and 84.4 times higher than those of the terpolymer suspension, respectively, and the corresponding viscosity was 10.4 times higher at 90 ℃. These superior properties of nanocomposite microspheres will meet the tough requirements of oilfield development.
研究领域:
材料科学
·
石油工程
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产品关联
DOI
高影响因子
JOURNAL OF HAZARDOUS MATERIALS
·
2017
·
IF 6.065
Shunke Ding,Wenhai Chu,Tom Bond,Qi Wang,Naiyun Gao,Bin Xu,Erdeng Du
The occurrence of pharmaceuticals and personal care products (PPCPs) in natural waters, which act as drinking water sources, raises concerns. Moreover, those compounds incompletely removed by treatment have the chance to form toxic disinfection byproducts (DBPs) during subsequent disinfection. In this study, acetaminophen (Apap), commonly used to treat pain and fever, was selected as a model PPCP. The formation of carbonaceous and nitrogenous DBPs, namely trihalomethanes, haloacetonitriles, and haloacetamides, during chlor(am)ination of Apap was investigated. Yields of chloroform (CF), dichloroacetonitrile (DCAN), dicholoacetamide (DCAcAm), and tricholoacetamide (TCAcAm), during chlorination were all higher than from chloramination. The yields of CF continuously increased over 48 h during both chlorination and chloramination. During chlorination, as the chlorine/Apap molar ratios increased from 1 to 20, CF yields increased from 0.33 ± 0.02% to 2.52 ± 0.15%, while the yields of DCAN, DCAcAm and TCAcAm all increased then decreased. In contrast, during chloramination, increased chloramine doses enhanced the formation of all DBPs. Acidic conditions favored nitrogenous DBP formation, regardless of chlorination or chloramination, whereas alkaline conditions enhanced CF formation. Two proposed formation mechanisms are presented. The analysed DBPs formed during chlorination were 2 orders of magnitude more genotoxic and cytotoxicity than those from chloramination.
研究领域:
环境科学
·
毒理学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CARBOHYDRATE POLYMERS
·
2015
·
IF 4.074
Yong-Fu Li,Jing Jin,Qin Guo,Yi-Ming Ha,Qing-Peng Li
The β-cyclodextrin-acrylamide (CDM-AM) copolymer was prepared from acrylamide and β-CD maleate (CDM) using K 2 S 2 O 8 as initiator. The effects of the CDM-AM copolymer on the solubility and fungicidal activity of natamycin (NM) and carbendazim (MBC) were investigated. The stability constant of NM·CDM-AM and MBC·CDM-AM complexes at 303 K were of 10,725.45 M −1 and 3000.89 M −1 , respectively. The complexes were characterized using phase solubility diagrams, NMR spectra and FT-IR spectra. The analysis of the biological activities of these two complexes indicated that they possessed enhancing fungicidal activities compared to NM and MBC alone.
研究领域:
材料科学
·
生物学
·
农业科学
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产品关联
DOI
PubMed
高影响因子
Environmental Science-Water Research & Technology
·
2018
·Vol. 5
·期 2
·397-405
·
IF 3.649
Yan Huang,Yangyang Zhang,Qing Zhou,Aimin Li,Peng Shi,Jingfan Qiu,Yang Pan
Disinfection of wastewater effluents could generate numerous toxic disinfection byproducts (DBPs) during wastewater reclamation owing to the complexity of their dissolved organic matter. Recently, iodinated disinfection byproducts (I-DBPs) have attracted increasing attention as a result of their higher toxicity than their brominated and chlorinated analogues. In this study, various new polar I-DBPs in chlor(am)inated wastewater effluents were detected with ultra-performance liquid chromatography/electrospray ionization-triple quadrupole mass spectrometry (UPLC/ESI-tqMS) by setting a precursor ion scan of m/z 126.9. Three new polar I-DBPs were identified as wastewater I-DBPs, including iodoacetic acid, chloroiodoacetic acid and 3,5-diiodo-4-hydroxybenzaldehyde. The remaining new polar I-DBPs were proposed with structures, nine of which were found to be aromatic halogenated DBPs, and six of which were proposed to be in a group because they share closely related m/z values, retention times, and fragmentation pathways. In addition, formation of these new polar I-DBPs with disinfectants and contact times was also studied. Compared with chlorination, chloramination generated more species and higher concentrations of new polar I-DBPs. Furthermore, control of the newly detected polar I-DBPs during chlorination by coagulation, resin adsorption, and combined processes was compared. Resin adsorption showed a higher precursor removal efficiency than coagulation, and thus achieved a better control of these new polar I-DBPs. Coagulation followed by resin adsorption was the most effective compared with single coagulation and single resin adsorption.
研究领域:
环境科学
·
毒理学
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）