Asia-Pacific Journal of Chemical Engineering
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2012
·Vol. 7
·期 6
·940-947
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IF 0.758
Jianxian Zeng,Qincheng He,Hu Zhou,Xiahui Sun,Jiaojiao Zhang
Complexation–ultrafiltration process was investigated for cerium(III) recovery from aqueous solutions by using poly (acrylic acid) sodium salt (PAASS) as a complexing agent. The adsorption of cerium(III) on PAASS was preliminarily studied at different pH values. Next, effects of pH, polymer metal ratio (PMR), calcium(II) and competitive complexing agents on permeate flux ( J ) and cerium rejection coefficient ( R ) were investigated in the total recirculation mode. Finally, the integrations of four experiments including concentration, decomplexation, regeneration of PAASS and reuse of regenerated PAASS were carried out. Obtained results show that the adsorption can be described well using the Langmuir equation. If pH is reduced below 4, J decreases rapidly. PMR has negligible effect on J . R increases with increasing pH or PMR. Calcium(II) and ethylenediaminetetraacetic acid disodium salt have the effects on R , but these effects can decrease by increasing pH. Tartrate sodium does not influence R . In the process of concentration, J declines slowly, and R is about 1. It takes 40 min to reach the decomplexation equilibrium at pH 3. The decomplexation percentage of cerium(III)–PAASS complex is about 70%. In the regeneration of PAASS, cerium(III) can be removed effectively, and the purification of regenerated PAASS is acceptably satisfactory. The binding capacity of regenerated PAASS is close to that of fresh PAASS, and the recovery percentage of binding capacity is higher than 90%. © 2012 Curtin University of Technology and John Wiley & Sons, Ltd.
研究领域:
化学工程
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环境科学
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DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
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2022
·
IF 9.136
Jinpeng Cai,Xiaodong Jia,Yinyu Ma,Ayman M. Ibrahim,Chao Su,Xingcai Yu,Peilun Shen,Dianwen Liu
In this work, adsorption and flotation tests were performed to investigate the suitability of sodium polyacrylate (PAAS) as a galena depressant in a Cu-Pb separation system and the effect of pre-oxidation on it. Adsorption studies show that PAAS effectively adsorbed on galena in the pH range 8–9, during the interaction between (R-COO - ) n and Pb(OH) + . However, the adsorption of PAAS on chalcopyrite was approximately 6.8-fold less than on galena. Insoluble lead oxides formed on the galena surface after pre-treated with hydrogen peroxide (H 2 O 2 ), which promoted the adsorption of Pb(OH) + on galena, thereby providing additional adsorption sites and enhancing the adsorption of PAAS on galena. For Cu-Pb bulk concentrate containing 3.03 % Cu and 62.32 % Pb, the use of PAAS combined with H 2 O 2 as a galena depressant for flotation separation yielded a Cu concentrate with 28.02 % Cu and a recovery of 82.56 %, containing 5.54 % Pb. The separation efficiency reached 65.44 %, comparable to that of potassium dichromate (K₂Cr₂O₇, 68.84 %). Compared with traditional chromium-containing depressants, this work avoids the pollution of metal chromium to humans and the environment, and provides a better reference for similar research.
研究领域:
矿物加工工程
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环境科学
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DOI
高影响因子
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
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2014
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IF 2.235
Zhen-Qiang Shi,Xue-Lian Huang,Chen Wang,Yi-Fan Li,Chao He,Chang-Sheng Zhao
In this study, poly(ether sulfone) (PES)/poly(sodium acrylate) (PSA) hybrid particles for the removal of environmental toxins were prepared via in situ cross-linked polymerization coupled with a liquid–liquid phase separation technique. The particles were characterized by Fourier transform infrared spectroscopy (FTIR), thermogravimetric analysis (TGA) and scanning electron microscopy (SEM). Batch experiments were performed to verify the adsorption capability of the particles, and the initial concentrations and pH values of the solutions significantly affected the adsorption process. In addition, both adsorption kinetic and adsorption isotherm models were used to analyze the adsorption process of Cu2+. The modified PES particles showed high adsorption capability for Cu2+ and methylene blue (MB), and a particle column was used to further study the removal ability of environmental toxins. The results indicated that the hybrid particles had great potential to remove heavy metal ions and cationic dyes for wastewater treatment on an industrial scale.
研究领域:
材料科学
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环境科学
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DOI
高影响因子
Applied Sciences-Basel
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2019
·Vol. 9
·期 18
·3847
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IF 2.217
Mingtang Tan,Peiyun Li,Wenhui Yu,Jinfeng Wang,Jing Xie
This study aimed to investigate the effects of glazing with sodium polyacrylate (SP) and D-sodium erythorbate (DSE) on the quality changes of squid during frozen storage. Frozen squid samples were randomly divided into seven groups: (1) CK (unglazed); (2) WG (distilled water-glazed); (3) SG (0.1% SP -glazed); (4) SG-1DSE (0.1% SP with 0.1% DSE -glazed); (5) SG-3DSE (0.1% SP with 0.3% DSE-glazed); (6) SG-5DSE (0.1% SP with 0.5% DSE-glazed); (7) WG-1DSE (0.1% DSE-glazed). The efficacy of the different coatings was evaluated using various indicators, such as water holding capacity (WHC), pH value, low field nuclear magnetic resonance (LF-NMR), color, malondialdehyde (MDA) content value, free amino acids (FAAs) content, intrinsic fluorescence intensity (IFI) and the total sulfhydryl content (SH) content. Intrinsic fluorescence intensity (IFI) and low field nuclear magnetic resonance (LF-NMR) were used as fast monitoring techniques to monitor changes in quality of squid samples. The results showed that compared with the CK and WG groups, coating with either SG or DSE alone resulted in reduced rate of moisture loss (p< 0.05), lipid oxidation (p< 0.05) protein degradation (p< 0.05) and prolonged its shelf-life. The combination of glazing treatment with SG and DSE (groups SG-1DSE, SG-3DSE and SG-5DSE) further improved the protective effects of coating, particularly in the SG-3DSE group. Therefore, the glazing of SG-3DSE is recommended to be used to control the quality of frozen squid and to prolong its shelf-life during frozen storage.Keywords:squid;glazing;frozen storage;sodium polyacrylate;D-sodium erythorbate;quality
研究领域:
食品科学
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海洋生物学
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保鲜技术
✓ 已验证
DOI
高影响因子
JOURNAL OF POLYMER SCIENCE
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2025
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IF 3.6
Xiao-Ming Zhang,Qiao Zhang,Jiangang Gao,Xiang-Yun Du
Wastewater treatment contributes to the sustainable utilization of water resources for alleviating water scarcity. The application of polymeric materials as adsorbents for eliminating hazardous substances in water has garnered extensive attention owing to their remarkable adsorption efficiency, stability, and selectivity. Herein, a facile strategy is provided to rapidly synthesize poly(acrylic acid- co -sodium 2-acrylamide-2-methylpropanesulfonate) (poly(AA- co -NaAMPS)) hydrogels with exceptional adsorptive capacity via frontal polymerization (FP). The FP processes are meticulously examined in terms of initiator dosage and monomer ratio. The as-prepared hydrogels demonstrate pH-responsive swelling ability and pH-dependent adsorption capacity for various dyes and heavy metal ions. Compared with traditional batch polymerization (BP), the hydrogels prepared by FP exhibit superior swelling and adsorption abilities. Additionally, research on the adsorption mechanism for both dyes and heavy metal ions is conducted by fitting the adsorption kinetic data both with Langmuir and Freundlich equations. The maximum adsorption capacity ( q m ) of hydrogels derived from Langmuir model for dyes of methylene blue (MB) and rhodamine B (RB) is, respectively, 595.3 and 3078.5 mg g −1 , while for heavy metal ions of Cr 3+ and Cd 2+ is, respectively, 1010.8 and 1191.3 mg g −1 . This research exploits an alternative approach for the rapid preparation of high-efficiency hydrogel adsorbents toward wastewater treatment. Graphical Poly(AA- co -NaAMPS) hydrogels are facile synthesized through frontal polymerization within 10 min. The as-prepared hydrogels display excellent adsorption ability for both dyes and heavy metal ions. The maximum adsorption capacity for dyes of methylene blue and rhodamine B is, respectively, 595.3 and 3078.5 mg g −1 , while for heavy metal ions of Cr 3+ and Cd 2+ is, respectively, 1010.8 and 1191.3 mg g −1 .
研究领域:
环境科学
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材料科学
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产品关联
DOI
高影响因子
ADVANCES IN POLYMER TECHNOLOGY
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2018
·Vol. 37
·期 8
·3650-3658
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IF 2.073
Zhengping Fang,Xingning Zhang,Meng Xia,Wei Luo,Huiling Hu,Zhiguo Wang,Peixin He,Yuhong Zhang
By multicomponent mechanical blending technology, water-swelling rubber (WSR) was prepared through choosing chlorinated polyethylene (CPE), a superabsorbent polymer (cross-linking poly(sodium acrylate), CPNaAA), and compatibilizer (poly(methyl methacrylate-co-maleic anhydride), P (MMA-co-MAH)) along with other minor additives. P (MMA-co-MAH) was synthesized by grafting maleic anhydride (MAH) onto methyl methacrylate (MMA). Microstructure, water-absorbent properties, and mechanical properties of WSR were investigated. The results showed that P (MMA-co-MAH) boosted the dispersibility between CPNaAA and CPE and led to the increase in Shore A hardness, tensile strength, tensile stress at 100%, and water-swelling behavior, whereas the elongation at break and weight loss were decreased with P (MMA-co-MAH) content. When the content of P (MMA-co-MAH) reached 8 phr, the tensile strength, hardness, and water-swelling ability of dry-state WSR exhibited a maximum value and the percentage loss ratio of CPNaAA reached a relatively low value.
研究领域:
材料科学
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高分子化学
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产品关联
DOI
高影响因子
JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY
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2021
·Vol. 147
·期 15
·8177-8188
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IF 4.626
Fang Manting,Zhang Xuelai,Ji Jun,Hua Weisan,Zhao Yi,Liang Jiyuan
In order to solve the phase separation problem of Na 2 S 2 O 3 ·5H2O–CH3COONa·3H 2 O PCM (phase change material), sodium carboxymethyl cellulose (CMC), hydroxyethyl cellulose (HEC), xanthan gum (XG), sodium polyacrylate (PAAS) and polyacrylamide (PAM) were selected as additives. The effects of different proportions of the above thickeners on the supercooling degree, phase separation, phase change temperature and latent heat of Na 2 S 2 O 3 ·5H2O–CH3COONa·3H 2 O system were studied by using the cooling curve and DSC, so as to screen the best thickener for eutectic PCM. The experimental results show that CMC, XG and PAAS can eliminate the phase separation of Na 2 S 2 O 3 ·5H2O–CH3COONa·3H 2 O. Among them, the optimal ratio of CMC, XG and PAAS is 3 mass%, 3 mass% and 1 mass%, respectively. From the perspective of heat storage performance, PAAS is the optimal thickener for Na 2 S 2 O 3 ·5H2O–CH3COONa·3H 2 O. The phase change temperature is 40.5 °C. The subcooling degree is about 14.7 °C, and the latent heat is about 221 J g −1 . The melting time is 15 min. Only PAAS can make Na 2 S 2 O 3 ·5H2O–CH3COONa·3H 2 O eutectic PCM completely exothermic at room temperature, which can not only play the role of thickener to eliminate phase separation, but also is a nucleating agent. After 100 melting-solidification cycles, the change rate of latent heat value was only 5%, and the change rate of phase transition temperature was less than 1%. Considering heat storage performance and cyclic stability, PAAS is the optimal thickener for Na 2 S 2 O 3 ·5H2O–CH3COONa·3H 2 O PCM.
研究领域:
材料科学
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热能存储
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产品关联
DOI
高影响因子
Materials Today Communications
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2024
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IF 3.7
Haifeng Wang,Jiayu Peng,Yiqing Yao,Zhijie Liang
A novel pre-synthesized polymer is fabricated with sodium polyacrylate and acrylic acid through free radical polymerization . Interestingly, the pre-synthesized polymer is further polymerized on the polyester-cotton fabric in the presence of glycerol as a cross-linking agent forming superabsorbent fabric. The composite functional fabrics is prepared by two steps, namely synthesis and finishing process. Owing to the vital role of the viscosity of pre-polymer for the superabsorbent property, the effect of monomer concentration , temperature, time, dosage of initiator and degree of neutralization on the viscosity of pre-polymer is thoroughly investigated. Besides, the effects of the degree of neutralization and dosage of polymerization solution as well as cross-linking agent on the water absorption of the composite and unfinished polyester-cotton blended fabrics is compared, respectively. After treatment, the water absorption capacity increases from 1 to 323.52 g/g in 1 h, reaching a maximum value of 417.53 g/g after 3.5 h. Besides, the water transportation obeys a Fickian diffusion mechanism. Furthermore, the composite fabric exhibits an optimum water retention capacity of up to 4 h. This speedy and super-water-absorbing material exhibits great potential in practical applications, such as in sanitary articles, wound dressings, and soil moisture.
研究领域:
材料科学
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纺织工程
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高分子化学
✓ 已验证
产品关联
DOI
高影响因子
TEXTILE RESEARCH JOURNAL
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2019
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IF 1.613
Yajie Ding,Chong Zhang,Guoqiang Cai,Ke Xu,Jindan Wu,Jinhuan Zheng,Jiping Wang
Water scarcity and pollution has become one of the most serious problems in the world. Generally, both oils and microorganisms exist in polluted water, hence multi-functional materials for the removal of diverse substances from water are desired. We reported a facile method for preparing cotton fabric possessing hybrid poly(sodium methacrylate) (pNaMAA)/silver nanoparticles (AgNPs) for oil/water separation and water disinfection. A crosslinked pNaMAA layer was generated on the cotton surface by ultraviolet-initiated polymerization. By replacing Na+ in pNaMAA molecules, Ag+ was incorporated into the fabric and then was reduced to AgNPs in situ by photo-thermal reduction. Due to the high underwater oleophobicity and bactericidal effect of the pNaMAA/AgNP hybrid layer, the gravity-driven oil/water separation efficiency of the prepared fabric was higher than 99% and the bacteria killing ratio achieved nearly 100%. Furthermore, AgNPs exhibited relatively good fastness during application. Combining their excellent oil removal and water disinfection effectiveness, these textile-based materials provide a promising future in the field of point-of-use water purification.
研究领域:
材料科学
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环境科学
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产品关联
DOI
高影响因子
RSC Advances
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2022
·Vol. 12
·期 14
·8792-8803
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IF 4.036
Shi-Jie Li,Xiang-Yu Yang,Li-Sheng Deng,Yong-Chun Fu,Ming-Jun Pang,Ti Dong,Yi-Song Yu,Ling-Na Su,Shang Jiang
In this research, the core objective is to explore the effect of super-absorbent polymer material (poly(sodium acrylate)) on the heat storage performance of magnesium sulfate and to investigate the heat transfer behavior of 13X-zeolite, nano-aluminum oxide (nano-Al2O3) and poly(sodium acrylate) modified magnesium sulfate in a reactor. Finally it provides support for future material and reactor design. All characterizations and performance tests were done in the laboratory and a numerical simulation method was used to investigate the heat transfer behavior of the reactor. Through hydrothermal treatment, bulk MgSO4·6H2O was changed into nanoparticles (200–500 nm) when composited with poly(sodium acrylate), 13X-zeolite and nano-Al2O3. Among these materials, MgSO4·6H2O shows the highest activation energy (36.8 kJ mol−1) and the lowest energy density (325 kJ kg−1). The activation energy and heat storage energy density of nano-Al2O3 modified composite material MA-1 are 28.5 kJ mol−1 and 1305 kJ kg−1, respectively. Poly(sodium acrylate) modified composite material, MPSA-3, shows good heat storage energy density (1100 kJ kg−1) and the lowest activation energy (22.3 kJ mol−1) due its high water-absorbing rate and dispersing effect. 13X-zeolite modified composite material MZ-2 shows lower activation energy (32.4 kJ mol−1) and the highest heat storage density (1411 kJ kg−1), which is 4.3 times higher than that of pure magnesium sulfate hexahydrate. According to the heat transfer numerical simulation, hygroscopic additives could prominently change the temperature distribution in the reactor and efficiently release heat to the thermal load side. The experimental and numerical simulation temperatures are similar. This indicates that the result of the numerical simulation is very close to the actual heat transfer behavior. This reactor could output heat at around 50 °C and absorb heat in the range of 100–200 °C. All these results further prove the strategy that thermochemical nanomaterial synthesis technology combined with material-reactor heat transfer numerical simulation is feasible for future material and reactor design.
研究领域:
材料科学
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能源工程
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化学工程
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产品关联
DOI
PubMed
高影响因子
CEMENT AND CONCRETE RESEARCH
·
2023
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IF 11.4
Zhaoyang Sun,Yunjian Li,Xing Ming,Qing Liu,Zongjin Li,Binmeng Chen
Achieving desired yield stress is crucial for various construction processes , especially in the emerging 3D concrete printing . In this paper, we present the possibility of enhancing yield stress of cement paste through in-situ polymerization and uncover the mechanisms of in-situ polymerized polymers. We investigate the effects of two types of in-situ polymerized polymer, sodium polyacrylate (PAAS) and polyacrylamide (PAM), on the yield stress, interstitial solution viscosity, and flocculated structure, as well as their adsorption behaviors on the surface of cement particles. The results show that the yield stresses of both in-situ polymerization modified cement pastes are raised considerably at high polymer concentration , which can be attributed to the dual roles of generated polymers. On the one hand, the absorbing polymers can bridge cement particles together, resulting in an augmentation in the interparticle forces . On the other hand, the non-adsorbing polymers remaining in the interstitial solution interact with each other and create a robust polymer network that can effectively withstand the external stresses. The former mechanism emerges as the dominant contributor to the enhanced yield stress of cement paste modified with in-situ polymerized PAAS, attributed to the Freundlich multilayer adsorption behavior of PAAS amplifying the bridging effect of polymers. While in-situ polymerized PAM predominantly assume the latter role, largely due to the remarkable length of their chain structure and the abundant residual polymers in the interstitial solution, which greatly intensities the interaction between polymers.
研究领域:
土木工程
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材料科学
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DOI
高影响因子
RSC Advances
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2016
·Vol. 6
·期 91
·88633-88639
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IF 3.289
Qiming Zhao,Shuchao Wu,Peimin Zhang,Yan Zhu
Polyacrylic acid sodium (PAAS), which is an anionic water-soluble polymer, is widely utilized as a thickener in the food industry and flocculant in water treatment owing to its high anion density, low cost and nontoxicity. Herein, we report for the first time the synthesis of monodisperse micron-grade carbon microspheres (CMSs) through the hydrothermal carbonization of sucrose with the assistance of trace PAAS, and their potential application as a green stationary phase for ion chromatography. An appropriate amount of PAAS efficiently inhibits the crosslinking of the formed CMSs, which results in monodispersity. The hydrothermal method was proven effective at a high sucrose concentration and for scalable experiments. The average size of the CMSs could be facilely regulated from 1.2 μm to 5.0 μm via hydrothermal time, temperature and sucrose concentration. The hydrothermal CMSs were further modified with quaternary ammonium groups based on the polycondensation of methylamine and 1,4-butanediol diglycidyl ether. Utilizing the quaternized CMSs as an ion chromatography stationary phase and potassium hydroxide solutions as the mobile phase, common inorganic anions were well separated with good symmetrical peak shapes and high stability.
研究领域:
材料科学
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分析化学
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）