Materials Today Communications
·
2025
·
IF 4.5
Shangyu Hu,Bao Ren,Fanfei Min,Mingkang Xu,Xiaowei Huang,Jiaqiang Zhu
The intractable mineral processing wastewater poses severe challenges to ecological environments and resource utilization. Developing novel flocculants for efficient treatment of complex mineral processing wastewater is an urgent problem that demands immediate resolution. In this study, a novel cationic polyacrylamide flocculant with hydrophobic modification, designated P(AM-MAPTAC-TEMAC 6 ), was synthesized via low-pressure ultraviolet (UV) -initiated polymerization using methacrylamido propyl trimethyl ammonium chloride (MAPTAC), acrylamide (AM), and perfluorohexyl ethyl methacrylate (TEMAC 6 ) as comonomers, with irgacure 2959 as the photo-initiator. The synthesis conditions were systematically optimized through single-factor experiments, culminating in optimal parameters: total monomer concentration of 35%, TEMAC 6 content of 10 wt%, photo-initiator dosage of 0.3 wt%, surfactant dosage of 0.8 wt%, UV irradiation time of 4 h, and urea dosage of 0.3 wt%. The successful synthesis of the copolymer was confirmed by ¹H nuclear magnetic resonance (¹H NMR) and Fourier transform infrared spectroscopy (FTIR). Scanning electron microscopy (SEM) revealed a well-developed porous structure, while thermogravimetric analysis (TG/DTG) demonstrated enhanced thermal stability. Flocculation and dewatering tests showed that P(AM-MAPTAC-TEMAC 6 ) exhibited superior turbidity removal and moisture reduction compared to three commercial flocculants in kaolinite, quartz, and montmorillonite suspensions. At a dosage of 50 g/t, residual turbidity values reached 99.63 NTU, 110.5 NTU, and 63.35 NTU, respectively, while the increments in moisture content of filter cakes consistently lower than that achieved by three commercial flocculants.
研究领域:
环境工程
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高分子化学
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矿物加工
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水处理技术
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胶体与界面化学
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DOI
高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2019
·Vol. 136
·期 30
·47813
·
IF 2.188
Yuming Huang,Dingyu Zhang,Wenlong Zheng
In the petroleum industry, high temperature and high pressure (HTHP) would dramatically worsen rheological properties and increase fluid loss volumes of drilling fluids. Synthetic polymer as an indispensable additive has attracted more and more attention recently. In this article, a new copolymer (named AADS) of 2-acrylamide-2-methylpropanesulfonic acid, acrylamide, dimethyl diallyl ammonium chloride, and sodium styrene sulfonate was synthesized through aqueous solution polymerization. The chemical structure of the copolymer was characterized by Fourier transform infrared spectroscopy and nuclear magnetic resonance. Moreover, its thermal stability was simultaneously analyzed using a differential scanning calorimetry. The results showed that the synthetic polymer contained all the designed functional groups, and its structure was consistent to the desired one. Under contamination of sodium chloride, AADS solution maintained relatively high viscosity in high concentration brine, showing a good antisalt capacity. Furthermore, the effect of AADS content and temperature on rheological behavior and fluid loss volume of the water-based drilling fluid (WBDF) containing the synthesized product were investigated according to the American Petroleum Institute standard. Results showed that the rheological and filtration properties of the prepared WBDF were improved with the increase in the AADS concentration before and after the thermal aging test. In addition, in the temperature range of 80–240 °C, a reversible rheological behavior was observed during the heating–cooling process, and the HTHP fluid loss was controlled within 22.5 mL, suggesting that the copolymer AADS was suitable for making WBDF s with high temperature resistance. © 2019 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2019 , 136 , 47813.
研究领域:
石油工程
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高分子科学
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材料科学
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DOI
高影响因子
POLYMER INTERNATIONAL
·
2023
·Vol. 72
·期 7
·664-670
·
IF 3.2
Bin Li,Mengjing Zhou,Xiaojia Xu,Jizhen Liu,Wenrui Hao,Aolin Wu
Choline chloride, acrylamide (AM) and acrylic acid (AA) were used as raw materials to prepare deep eutectic solvent, and β-cyclodextrin (β-CD) was used as filler to prepare β-CD/P(AM- co -AA) composite hydrogel by frontal polymerization. The composite hydrogel was characterized by Fourier transform infrared spectroscopy and scanning electron microscopy. The pH response, mechanical properties and self-healing of the hydrogel were studied. The results show that AA contains easily ionized –COOH, which makes the composite hydrogel have excellent pH response and super-high swelling ratio under alkaline conditions. With the addition of β-CD, due to the increase of hydrogen bonds and the combination of β-CD and polymer chains the mechanical properties of the hydrogel are obviously improved and the tensile strength and compressive strength are increased by 4.12 and 2.26 times respectively. The introduction of β-CD can improve the self-healing performance of the composite hydrogel. With the increase of β-CD content, the healing rate and healing speed of the composite hydrogel show an upward trend. In this study, a simpler and faster method is proposed to prepare self-healing composite hydrogel with excellent mechanical properties and pH responsiveness. The self-healing property and the existence of a hydrophobic cavity of β-CD make β-CD/P(AM- co -AA) composite hydrogel have potential application in wound healing. © 2023 Society of Industrial Chemistry.
研究领域:
材料科学
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生物医学工程
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DOI
高影响因子
RSC Advances
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2022
·Vol. 12
·期 30
·19022-19028
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IF 4.036
Bin Li,Xiaojia Xu,Zhigang Hu,Yongjing Li,Mengjing Zhou,Jizhen Liu,Yajun Jiang,Peng Wang
Deep eutectic solvent (DES) was prepared by using acrylic acid (AA) and acrylamide (AM) as hydrogen bonding donors (HBD) and choline chloride (ChCl) as hydrogen bonding receptors (HBA). Nitrogen-doped carbon nanotubes (N-CNTs) were dispersed in DES as fillers, and N-CNTs/P(AA-co-AM) composite hydrogels were prepared by FP. The interaction mode between the hydrogel and N-CNTs was characterized by Fourier infrared spectroscopy (FTIR) and scanning electron microscopy (SEM). The mechanical properties, pH response and electrical conductivity of the composite hydrogels were studied. The results showed that the mechanical properties of the hydrogel were significantly enhanced with the increase of N-CNT content. The tensile strength and compressive strength of the FP4 composite hydrogel reached 5.42 MPa and 4.29 MPa, respectively. Due to the dissociation of carboxyl groups in AA in an alkaline environment the composite hydrogel showed excellent pH response performance. The conductivity of the hydrogel was also found to be improved with the content of N-CNTs. When the content of N-CNTs is 1.0 wt%, the conductivity of the hydrogel was 4.2 times higher than that of the hydrogel without N-CNTs, and connecting it to a circuit can make an LED lamp emit bright light. In this study, a simple and green method was proposed to prepare composite hydrogels with excellent mechanical properties and electrical conductivity by FP of DES in less than 5 min.
研究领域:
材料科学
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化学工程
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产品关联
DOI
PubMed
高影响因子
PROCESS SAFETY AND ENVIRONMENTAL PROTECTION
·
2022
·
IF 7.926
Hailin Yu,Huili Zhang,Xin Wei,Yong Chen,Bo Yu,Yingjun Wang,Hongsheng Liu
Efficient purification of oily sewage, recycling, and standard discharge have become key issues for the sustainable development of oil fields. In this study, the surface of PPFS was organically modified by a silane coupling agent . Then, covalently bonded cationic block inorganic-organic composite coagulant was prepared by chosen sodium polyacrylate as the template. This unique structure significantly enhances the positive charge and molecular chain length of the coagulant, thus improving its ability to perform charge neutralisation, adsorption bridging, and sweep coagulation. The characteristic functional groups and thermophysical properties of the composite coagulant were analysed by FTIR and thermogravimetric analysis . The transformation of random copolymers to block copolymers was determined by 1 H NMR, thus confirming the successful synthesis of the cationic block structures. The turbidity removal and oil removal properties of oily sewage were investigated by coagulation experiment. The Zeta potential , dynamic and static light scattering, and field emission scanning electron microscopy (SEM) were used to study the effect of composite coagulants on the microscopic morphology and coagulation of flocs. Finally, the coagulation mechanism of the compound coagulant was analyzed with the dynamic change of the particle size of the flocs. The cationic block structure in TP(AM-DAC-PPFS) can effectively neutralise the negative charges on the surface of impurity particles and emulsified oil. The optimal dosage of TP(AM-DAC-PPFS) was 30 mg·L −1 , at which the turbidity and oil removal rates can reach 98.3% and 93.8%, respectively.
研究领域:
环境工程
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水处理
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高分子科学
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材料科学
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DOI
高影响因子
Metallomics
·
2019
·Vol. 12
·期 2
·173-182
·
IF 3.571
Lv Xiaoguang,Zheng Qiaoqiao,Li Ming,Huang Zhiwei,Peng Min,Sun Jing,Shi Ping
Clioquinol is recently considered to be the most promising drug for treating cancer and neurodegenerative diseases. However, its mode of action varies from different disease models. In this study, we found that clioquinol inhibited cell growth in human neurotypic SHSY-5Y cells, which was attributed to both S-phase cell-cycle arrest and autophagic cell death. Clioquinol increased the intracellular contents of iron and zinc as well as calcium as measured by ICP-AES. Staining of Fluo-3 confirmed an increase in the level of calcium. Analysis of the metal-binding ability of clioquinol showed that it was not a chelating agent of calcium ions and the elevation of intracellular calcium content is not achieved by clioquinol as an ionophore. CaCl2 could simulate or even aggravate the cytotoxicity of clioquinol and it increased S-phase cell cycle arrest induced by clioquinol in a concentration dependent manner. Staining of acridine orange demonstrated that autophagy induced by clioquinol was not affected by addition of calcium ions. In contrast, the intracellular calcium ion chelator BAPTA-am abolished the clioquinol-induced S phase arrest and reduced the cell death caused by clioquinol. The WB assay of cell cycle-related proteins (CDK2, p21 and p27) further confirmed that S phase arrest is positively correlated with intracellular calcium elevation, which was due to the alterations of the mRNA and protein levels of calcium pumps (SERCA and SPCA). Taken together, these data indicate that clioquinol regulates the level of intracellular calcium ions to induce S-phase cell cycle arrest in human SH-SY5Y cells. Our results demonstrate for the first time that an increase of intracellular calcium content is one of the mechanisms of clioquinol in the inhibition of human neurotypic SHSY-5Y cells.
研究领域:
肿瘤学
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神经科学
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细胞生物学
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产品关联
DOI
PubMed
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2026
·
IF 5.4
Zhiguo Sun,Honglong Wang,Xiaoguang Wang,Jiali Li,Qinghua Lin
Water superabsorbent resin has widely use potential in industrial field. Nevertheless, certain drawbacks restrain design and commercial profit achieving. A core lies in an efficient balance between water absorption, degradation and “green production”. Exploring a method to prepare a material that sustaining proper water absorption, degradation and “green production” or ensuring a fine cognization on reaction mechanism is in demand. In this work, pure corn starch was irradiated by an electron beam (EB) in air then treated by AA, AM grafting. Later, microstructure and macroscopic properties were explored by FT-IR, XPS, 13 C NMR, XRD, TGA, water and NaCl solution absorption, water retention, solid residue (SR) and monomer use efficiency rate (ER) analysis. Main results reveal that a reaction temperature, period, AA neutralization level, AM-AA, (NH 4 ) 2 S 2 O 8 and N, N-methylenebisacrylamide (MBA) amounts as 60 ℃, 2 h, 80 %, M AM :M AA :M St = (05 _ 0.8):10:1, M (NH4)2S2O8 :M St and M MBA :M St as 1 and 0.1 _ 0.5 wt% is an optimized condition for starch grafting AA, AM. Grafting reaction mainly occurred at C-6 site C-OH bond, initialing severe amorphization and a thermal-decomposition temperature elevation near 120 °C. Pure water and NaCl solution absorption capabilities-( Q H2O and Q NaCl solution ) were linearly promoted vs absorbed dose. A sample- St(500 kGy)- g -AA-AM-sustaining Q H2O and Q NaCl solution as 1098 and 82.1 g/g was achieved, which is in lined with commercial use standard (GB/T 22875–2018, Q H2O ≥ 20 g/g, Q NaCl solution ≥ 40 g/g). In addition, this sample displayed rapid water absorption response, excellent water retention and monomer use rates. A period as 3 min absorption achieved more than 80 wt% water absorption capability. A 60 °C, 24 h period heating leaved off more than 40 wt% absorbed water. AA, AM use rate is close to 95 %, according to “green production” category. It seems a possessing fine comprehensive property and being cleanly produced water absorbent resin was prepared via EB irradiation and starch grafting AA, AM and reaction mechanism was presented. This prepared material possibly sustains potential commercial profit and given reaction mechanism might promote starch AA, AM grafting product design.
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DOI
高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2026
·Vol. 143
·期 43
·e71460
·
IF 3.1
Haoyu Lv,Bin Li,Zhigang Hu,Mengjing Zhou,Jiawei Li,Longfei He,Yuzuo Liu,Ming Ma
In this study, a ternary deep eutectic solvent (DES) was prepared using glycerol (Gly), acrylamide (AM), and choline chloride (ChCl) as raw materials, and polyethylene glycol (PEG) with different mass fractions was introduced as a filler into the DES to fabricate PEG/P(G-AM-ChCl) composite hydrogels via photopolymerization. The composite hydrogels were characterized by scanning electron microscopy (SEM) and Fourier transform infrared spectroscopy (FTIR). The effects of PEG content on the swelling behavior, water holding capacity, mechanical properties, and fatigue resistance of the composite hydrogels were systematically investigated. The results showed that the addition of PEG promoted the formation of a denser hydrogen bonding network within the hydrogel, effectively reducing the water loss rate, and the equilibrium swelling degree of the composite hydrogels increased to 9.61 with increasing PEG content. The composite hydrogels exhibited excellent mechanical properties and fatigue resistance, with a compressive strength reaching 0.157 MPa after PEG addition, which was 1.25 times higher than that of the PEG-free group. This study provides a simple method for preparing composite hydrogels with high water holding efficiency.
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DOI
高影响因子
Journal of Building Engineering
·
2026
·
IF 7.4
Bing Yin,Zekun Wang,Zhihao Lin,Xueling Yin,Jiahui Lin,Dongshuai Hou,Haoyu Wang,Chaohong Liu
Polymer modification has demonstrated effectiveness in improving fracture resistance and mitigating brittleness in cement-based materials. However, conventional modification methods result in compromised strength or an imbalance in mechanical properties. This study develops an innovative dual-network modification strategy through the synergistic combination of in-situ acrylamide (AM) polymerization and oxidized starch (OS) gelatinization in cement-based materials. The gelatinized OS forms a homogeneous framework that regulates moisture, while the in-situ formed polyacrylamide (PAM) interacts with it to create an interpenetrating network. This unique structure refines the polymer morphology and enhances the interface with cement hydrates. The resulting composite demonstrates a 103% increase in 28-day flexural strength compared to plain cement. Furthermore, the composite maintains superior performance over both in-situ polymerization-modified specimens and conventional polymer-modified systems, retaining 12% higher 28-day flexural strength and 19% greater compressive strength than AM in-situ polymerization modified samples. Microstructural analysis indicates that the approach optimizes hydration and promotes stress redistribution. This work suggests that controlled dual-network interpenetration offers a promising pathway to mitigate the traditional strength-toughness trade-off in cement-polymer composites.
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DOI
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2019
·
IF 3.131
Hao Yang,Hanlin Ding,Xiaonuo Zhang,Xuegang Luo,Yu Zhang
In this study, a new surface-modified biobased composite was obtained by modifying the surface of fungal mycelium microspheres (FHMs) with polydopamine (PDA). A. niger mycelium/PDA microspheres (AM/PDA microspheres) were used as a highly efficient adsorbent for the removal of U(VI) ions. This study examined the effects of the initial pH, ionic strength, and electrolyte ions on the U(VI) adsorption capacity of the AM/PDA microspheres. The results confirmed that U(VI) was successfully adsorbed on the AM/PDA microspheres. We compared their adsorption capacity with that of other adsorbents, and the adsorption rate and adsorption capacity of the AM/PDA microspheres were found to be higher than those of the other adsorbents. Equilibrium was achieved after 300 min, and the AM/PDA microspheres had a maximum adsorption capacity of 250.70 mg/g. We aimed not only to investigate the factors that affect the adsorption process but also to provide a new mycelial-based composite adsorbent for U(VI)-contaminated water.
研究领域:
环境科学
·
生物材料学
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产品关联
DOI
高影响因子
MINERALS ENGINEERING
·
2019
·
IF 3.315
Wenjie Zou,Lu Gong,Jun Huang,Mingfei Pan,Zhenzhen Lu,Chunbao Sun,Hongbo Zeng
Selective flocculation is an efficient separation method for processing fine coal. In this work, one type of hydrophobically modified polyacrylamide, poly(AM-NaAA-C 16 DMAAC) (HMPAM), was synthesized and used as flocculants of coal. The adsorption and interaction of HMPAM on model coal surface under the influence of KCl concentration were compared with a commercial polyacrylamide (PAM) using quartz crystal microbalance with dissipation monitoring (QCM-D), multi-angle laser light scattering (MALLS) and atomic force microscope (AFM). The QCM-D results showed that the adsorption amounts of both PAM and HMPAM on model coal surface increased with increasing KCl concentration, and the amount of HMPAM was much higher than that of PAM in 100 mM KCl solution. This result could be due to the fact that the high salinity (e.g., 100 mM KCl) led to the compressed conformation of the polymers and significantly compressed electric double layer repulsion. The conformational changes were determined using MALLS. The AFM force measurement results showed that the adhesion between the polymers and model coal surface increased with increasing the KCl concentrations due to the compressed electric double layer, and the average adhesion of PAM was about one order of magnitude smaller than that of HMPAM. Such difference was mainly ascribed to the hydrophobic attraction between the hydrophobic chain of HMPAM and model coal surface. Meanwhile, the attractive hydrophobic interaction between the hydrophobic chains induced the formation of multiple layers of HMPAM, which was in consistence with the QCM-D results. The fundamental insights into the interaction mechanisms of HMPAM/PAM on model coal surface will benefit the rational development of effective polymer additives for fine coal preparation.
研究领域:
矿物加工工程
·
界面化学
·
高分子化学
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产品关联
DOI
高影响因子
CARBOHYDRATE POLYMERS
·
2017
·
IF 4.811
Yongjun Sun,Chengyu Zhu,Wenquan Sun,Yanhua Xu,Xuefeng Xiao,Huaili Zheng,Huifang Wu,Cuiyun Liu
In this work, a highly efficient and environmentally friendly chitosan-based graft flocculant, namely, acrylamide- and dimethyl diallyl ammonium chloride-grafted chitosan [CS-g-P(AM-DMDAAC)], was prepared successfully through plasma initiation. FTIR results confirmed the successful polymerization of CS-g-P(AM-DMDAAC) and P(AM-DMDAAC). P(AM-DMDAAC) was the copolymer of acrylamide- and dimethyl diallyl ammonium chloride. SEM results revealed that a densely cross-linked network structure formed on the surface. XRD results verified that the ordered crystal structure of chitosan in CS-g-P(AM-DMDAAC) was changed into an amorphous structure after plasma-induced polymerization. The flocculation results of low-algal-turbidity water further showed the optimal flocculation efficiency of turbidity removal rate, COD removal rate, and Chl-a removal rate were 99.02%, 96.11%, and 92.20%, respectively. The flocculation efficiency of CS-g-P(AM-DMDAAC) were significantly higher than those obtained by cationic polyacrylamide (CPAM) and Polymeric aluminum and iron (PAFC). This work provided a valuable basis for the design of eco-friendly naturally modified polymeric flocculants to enhance the flocculation of low-algal-turbidity water.
研究领域:
环境科学
·
材料科学
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产品关联
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）