JOURNAL OF COMPOSITE MATERIALS
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2015
·
IF 1.173
Guofu Ma,Feitian Ran,Enke Feng,Zhe Zhang,Ziqiang Lei
A novel, low-cost, and eco-friendly organic–inorganic composite superabsorbent is successfully prepared in aqueous solution by graft copolymerization of partially neutralized acrylic acid (AA), polyvinyl alcohol (PVA), and attapulgite (APT) using ammonium persulfate (APS) as an initiator and N,N-methylenebisacrylamide (MBA) as a crosslinker. The structure and morphology of the composite superabsorbent are characterized by means of Fourier transform infrared, X-ray diffraction, field-emission scanning electron microscopy, and transmission electron microscopy. The effects of APT content which can affect the water absorbency and the pH, ionic surfactants and different saline solution which can affect swelling capabilities of the composite superabsorbent are also investigated. The results show the composite superabsorbent give the best absorption up to 680 g/g and 53 g/g in distilled water and 0.9 wt% NaCl solution, high water absorbency over a wide pH range of 4–10, high swelling capacity in anionic surfactant than that of cationic solution, which makes it promising for potential applications in modern agriculture and horticulture. On the other hand, the composite superabsorbent can be used for removing multivalent metal ions.
研究领域:
材料科学
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环境科学
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农业科学
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DOI
高影响因子
RESEARCH ON CHEMICAL INTERMEDIATES
·
2018
·Vol. 44
·期 11
·6963-6977
·
IF 1.674
Ma Xijun,Zhang Yingying,Zhou Jiuyang,Xue Yuanyuan,Shang Linjie,Xie Xingyong,Wu Zhengyan,Zhang Jing
A trisynergetic system (AFB) of nanoscale zero-valent iron (NI)–biofilm supported on attapulgite (ATP) was used to degrade nitrobenzene (NTB) in aqueous solution. We first synthesized a nanocomposite of ATP, polyvinyl alcohol, and NI as the growth carrier (AP-NI) for the biofilm. The activity of the biofilm was determined after its successful application, and the microorganisms were domesticated using NTB wastewater. The specific surface area of the AP-NI carrier was 158 m 2 /g, much higher than that of the traditional carrier polyvinyl alcohol (30.1 m 2 /g). AP-NI could be evenly distributed in water rather than settling, due to its average density of 0.647 g/m 3 . Additionally, the reductive efficiency of AP-NI towards NTB was about 91%, providing good support for the subsequent construction of the biofilm. Scanning electron microscopy (SEM) results indicated that the microorganisms were dominated by globular bacteria after acclimation, and could completely degrade 8 mg/L NTB in 24 h with high activity. The microbial activity depended more strongly on the choice of carbon source. Finally, polymerase chain reaction denaturing gradient gel electrophoresis (PCR-DGGE) technology was used to analyze the microbial community structure and 16S ribosomal DNA (rDNA) sequence. The NTB degradation mechanism of the trisynergetic system revealed a mainly aerobic pathway with an iron cycle.
研究领域:
环境科学
·
微生物学
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DOI
高影响因子
PEST MANAGEMENT SCIENCE
·
2024
·Vol. 80
·期 8
·3884-3892
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IF 3.8
Sijia Zhang,Zhenggang Xiao
BACKGROUNDS Pesticides have been widely applied to promote plant growth due to their high insecticidal efficiency. However, most pesticides easily slip from the leaf surface due to the low foliar adhesion, leading to significant damage to the environment and human health. Increasing foliar adhesion of pesticides has been a major challenge. Nanomaterial technology, which can deliver pesticide active ingredients, offers a new opportunity to increase pesticides efficacy with higher foliar adhesion. RESULTS In this study, we prepared the pesticide loaded nanohydrogel ALP@Ge-g-P(AA-co-AM)/ATP by grafting attapulgite and gelatin onto P(AA-co-AM), and loading the pesticide alphacypermethrin synchronously via the emulsion solvent evaporation method. The size of the new nanohydrogel was 20.5 nm and the pesticide loading capacity was 21.5%. Compared to P(AA-co-AM), the water absorbency of Ge-g-P(AA-co-AM)/ATP increased by 54.3% in 120 min, while the water retention increased from 4.27% to 38.7% after 48 h. Washout experiments and contact angle results suggested that the nanohydrogel, with a contact angle of 44.8° indicating good wettability, can resist rain flush and increase foliar adhesion naturally. CONCLUSIONS Overall, the preparation of pesticide loaded nanohydrogel is simple. Experiments demonstrated the pesticide loaded nanohydrogel has high efficiency and strong foliar adhesion. This makes it a promising candidate for spraying application and reducing pollution levels. © 2024 Society of Chemical Industry.
研究领域:
农业科学
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材料科学
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环境科学
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产品关联
DOI
PubMed
高影响因子
Biomaterials Advances
·
2024
·
IF 5.5
Xiaomei Wang,Yinfeng Yang,Fangfang Yang,Bin Mu,Aiqin Wang
Clay minerals have attracted wide attention as biomedical materials due to the unique crystal structure, abundant morphology and good biocompatibility. However, the relevant studies on the abundant natural mixed clay deposits were scarcely reported. Herein, the hemostatic performance of natural mixed-dimensional attapulgite clay (MDAPT) composed of one-dimensional attapulgite and multiple two-dimensional clay were systematically investigated based on the structural evolution using oxalic acid for different time. The results of hemostatic evaluation showed that MDAPT leached by oxalic acid with 1 h presented the shortest clotting time (134 ± 12.17 s), a 15.09 % and 41.74 % reduction of relative hemoglobin absorbance at 180 s and 120 s when compared with the control group, respectively, and an increase of 19.45 % of the blood clotting index in vitro , as well as MDAPT obtained the shortest bleeding time (158.5 ± 6.9 s), nearly 66 % and 31 % reduction blood loss as compared to the blank group and the YNBY group in vivo . This improvement was primarily ascribed to the synergistic effect of lamellar non-expandable illite, and nano rod-like attapulgite. Furthermore, the rapid hemostasis of MDAPT was also due to the joint effect of superhydrophobic property toward blood, minimizing blood loss, surface negative charge, metal ions from MDAPT structural skeleton, promoting an average increase of 21 % for platelet activation. The results suggested that MDAPT could be served as a promising efficient inorganic hemostatic materials, which provided a feasible strategy to realize the high-valued utilization of natural mixed clay resources.
研究领域:
生物医学材料
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止血
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粘土矿物
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材料科学
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产品关联
DOI
PubMed
高影响因子
COMPOSITE INTERFACES
·
2025
·
IF 2.4
Hongyan Li,Jianmeng Wu,Fen Wang,Guoqing Niu,Xinyu Liu,Mengsi Wu,Hui Yang
The inefficiency of traditional fertilizers in nutrient utilization has led to various ecological and environmental problems. Green agriculture requires environmentally friendly fertilizers that can respond to environmental changes to regulate nutrient release. In this study, N-isopropylacrylamide (NIPAm) and sodium alginate (SA) were utilized as monomers sensitive to temperature and pH variations, while hydrochloric acid-modified attapulgite (ATP) served as an inorganic filler to prepare composite hydrogels (SPAA) with environmentally responsive properties, and these composite hydrogels were used as carriers for the preparation of hydrogel fertilizers for urea. The results showed that the compositing of modified ATP could enhance the swelling properties of hydrogels. Compared with the blank sample, the maximum water absorption capacity of the ATP-composite hydrogel was enhanced by about 75.4%, and the water preserved by the ATP-composite hydrogel was about 2.75 times of that of the blank sample under drying condition of 30°C for 6 h. Meanwhile, hydrogel fertilizers SPAA-U(S) and SPAA-U(P) were prepared by solubilization adsorption and polymerization embedding in this study, and both fertilizers possessed slow-release characteristics, with nutrient release time in water exceeding 30 h. The nutrient release behavior of the fertilizers responded to the environment, and the slow-release effect was optimal under the conditions of 20°C and pH = 7. Under acidic, alkaline and high temperature conditions, the ability of the hydrogel to immobilize water molecules decreases, which also leads to easier release of urea from the hydrogel matrix along with water molecules. The hydrogel fertilizer developed in this work can improve the utilization of fertilizer and promote the high quality and sustainable development development of agriculture.
研究领域:
农业科学
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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
Catalysts
·
2025
·Vol. 15
·期 3
·252
·
IF 4
Haitao Zhang,Jian Shi,Chaoya Han,Zhizhao Song,Yao Xiao,Xiazhang Li
With the increasing demand for air pollution control, the development of efficient and stable catalysts to degrade hazardous VOCs such as toluene has become particularly important. Herein, various copper-doped attapulgite-supported cobalt oxide spinel composites (CuxCo3−xO4/ATP) were synthesized using an ultrasonic-assisted precipitation method. The results showed that the abundant Si-OH groups on the surface of ATP played a crucial role in anchoring Co, and the instantaneous high-energy input of ultrasonication facilitated the formation of Si-O-Co bonds in Co3O4/ATP. The doping of Cu ions induced the expansion of the Co3O4lattice, resulting in a significant number of oxygen vacancies. The ultrasound-induced synthesized Cu0.1Co2.9O4/ATP catalyst exhibited the best catalytic oxidation performance, achieving a 99% toluene degradation rate at 300 °C under a weight hourly space velocity (WHSV) of 10,000 mL·g−1h−1and initial toluene concentration of 1000 ppm, along with high stability during 12 h of continuous running. This work presents a new strategy for the cost-effective catalytic elimination of VOCs.
研究领域:
环境科学
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催化材料
·
空气污染控制
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产品关联
DOI
高影响因子
SN Applied Sciences
·
2019
·Vol. 1
·期 4
·1-9
·
IF 0
Wang Liang,Chen Qun,Zuo Shixiang,Yao Chao,Li Xiazhang,Liu Wenjie,Zhou Ming
Attapulgite/graphene conductive composite is modified by a silane coupling agent of N -(β-aminoethyl)-γ-aminopropyltrimethoxy-silane (KH-792) to make conductive attapulgite uniformly load on the surface of the graphene. The samples are characterized by X-ray diffraction, transmission electron microscopy and Fourier transform infrared spectroscopy. The results demonstrate that the conductive attapulgite is successfully grafted onto the surface of graphene. The characteristics of raw and modified absorbents are characterized by Fourier transform infrared spectroscopy, thermal analysis, scanning electron microscopy and transmission electron microscopy. The results show that the saturated mass fraction of the surface-adsorbed KH-792 silane coupling agent is about 3.0–5.0%. The electrical conductivity and mechanical properties of the conductive coating prepared from the modified conductive composite are investigated. The results show that the surface resistivity of the modified attapulgite/graphene conductive composite coating is smaller than that of the unmodified attapulgite/graphene conductive composite coating when the same amount of is added, and the mechanical properties are also greater than unmodified. As a comparison, when the composite material is 15% mass of the paint which can achieve a best performance.
研究领域:
材料科学
·
化学工程
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DOI
JOURNAL OF APPLIED POLYMER SCIENCE
·
2014
·Vol. 131
·期 22
·
IF 1.64
Haicun Yang,Hongting Pu,Fanghong Gong
Poly(methyl methacrylate) (PMMA) was bonded on the surface of attapulgite (ATP) by using an ammonium persulfate amine redox initiation system via grafting from approach. ATP was modified with (3-aminopropyl)triethoxysilane to anchor amine groups on the surface, and then the amine-functionalized ATP was further treated with methacryloyl chloride and 4,4′-azobis(4-cyanovaleric acid) to give methacryl- and azo-functionalized ATP, respectively. Subsequently, surface-initiated graft polymerization of MMA in a soap-free emulsion was performed to afford ATP/PMMA hybrids. Meanwhile, graft polymerizations on the surface of methacryl- and azo-functionalized ATP were carried out for comparison. The grafting of PMMA on the surface of ATP was characterized by Fourier transform infrared spectroscopy, X-ray photoelectron spectroscopy, and thermogravimetric analysis (TGA). The crystal structure of hybrids was characterized by X-ray diffraction analysis. The morphology of hybrids was observed by scanning electron microscopy and transmission electron microscopy. The degree of grafting obtained from surface-initiated graft polymerization in a soap-free emulsion was found to be the greatest (29.4%) estimated from TGA. © 2014 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2014 , 131 , 41062.
研究领域:
材料科学
·
高分子化学
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产品关联
DOI
高影响因子
POLYMER ENGINEERING AND SCIENCE
·
2014
·Vol. 55
·期 4
·889-895
·
IF 1.441
Liu Zhang,Haicun Yang,Hui Liu,Qingting Ni,Fanghong Gong
Polystyrene-grafted attapulgite (ATP-g-PS) was prepared using surface-initiated redox initiation via graft from approach. ATP was modified with (3- aminopropyl) triethoxysilane (APTES) to anchor amine on the surface (ATP-NH 2 ), and then ATP-NH 2 was further treated with 4-(diethylamino) salicylaldehyde (DEAS) to give aromatic tertiary amine groups functional ATP (ATP-ATA). Subsequently, the surface-initiated redox polymerization of styrene in the presence of ATP-ATA and benzoyl peroxide (BPO) was performed to afford ATP-g-PS . The chemical grafting of PS on the surface of ATP was confirmed by Fourier transform infrared spectroscopy, X-ray photoelectron spectroscopy, and thermogravimetric analysis . The crystal structure of PS-grafted ATP was characterized by X-ray diffraction (XRD) analysis. The morphology of ATP-g-PS was observed by scanning electron microscopy (SEM) . POLYM. ENG. SCI., 55:889–895, 2015. © 2014 Society of Plastics Engineers
研究领域:
材料科学
·
高分子化学
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产品关联
DOI
高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2014
·Vol. 132
·期 13
·
IF 1.64
Shiquan Lai,Yan Gao,Li Yue
An attapulgite-supported Sn catalyst (Sn-palgorskite) was successfully prepared by ion-exchange co-impregnation method. The catalytic effect of Sn-attapulgite on the melt polycondensation reaction of poly(butylene succinate) (PBS) was examined by comparing with that of anhydrous SnCl 2 and a blank experiment. The structures and properties of the PBS products synthesized with the three catalytic systems were characterized by means of Fourier transform-infrared spectra (FT-IR), viscosity measurements, wide angle X-ray diffraction (WARD), differential scanning calorimetry (DSC), and thermogravimetric analysis (TGA). Meanwhile, the acidolysis degradation behaviors of the PBS samples were also studied. It was found that the intrinsic viscosities and the number-average molecular weights of the PBS were remarkably increased under the catalysis of Sn-attapulgite, further leading to an increase in the decomposition temperature, the crystallization temperature, and the viscous flow activation energy, while a decrease in the melting temperature, the relative degree of crystallinity, and the rate of degradation. Additionally, no significant differences were observed in the crystal structures of all the samples, regardless of the reaction system with or without catalyst. The experiment results confirmed that Sn-attapulgite was an effective heterogeneous catalyst for the synthesis of PBS, and the recycled Sn-attapulgite still exhibited higher activity than anhydrous SnCl 2 under identical reaction conditions. © 2014 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2015 , 132 , 41729.
研究领域:
材料科学
·
催化化学
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产品关联
DOI
高影响因子
ANALYTICAL AND BIOANALYTICAL CHEMISTRY
·
2015
·Vol. 407
·期 12
·3525-3529
·
IF 3.436
Cheng Ting,Li Huihui,Ma Ying,Liu Xiaoyan,Zhang Haixia
2,4-Difluoro-3-formyl-phenylboronic acid (DFFPBA)-modified magnetic attapulgite (ATP-Fe 3 O 4 -NH 2 -DFFPBA) was synthesized and employed to capture and enrich cis -diol-containing biomolecules. The resulting material exhibited a high saturation magnetization value of 20.71 emu/g, allowing the absorbent to be conveniently magnetically separated. Combining the Fe 3 O 4 nanoparticles with the high specific surface area of attapulgite yielded a material with a high capture capacity (13.78 mg/g) for adenosine. Furthermore, ATP-Fe 3 O 4 -NH 2 -DFFPBA was found to possess remarkable selectivity for adenosine at a low molar ratio of adenosine/2-deoxyadenosine (1:500). The potential applications of this material were explored by using it to extract five nucleosides from urine samples, and the results demonstrate that it can decrease matrix interference and selectively enrich analytes.
Boronic-acid-functionalized magnetic attapulgite could selectively enrich the nucleosides in urine samples with the help of an external magnet
研究领域:
分析化学
·
生物医学工程
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产品关联
DOI
PubMed
高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2015
·Vol. 132
·期 45
·
IF 1.768
Hang Xu,Haicun Yang,Sheng Xue,Ji Pan,Qingting Ni,Fanghong Gong
Hybrid nanocomposites consisting of polydimethylaminoethyl methacrylate (PDMAEMA) and attapulgite (ATP) were prepared by using a surface thiol-Ce (IV) redox initiation system via graft from approach. Initially, ATP was chemically modified with γ-mercaptopropyltrimethoxysilane (MTS) to anchor thiol groups on the surface (ATP-MTS). Subsequently, surface-initiated polymerization of dimethylaminoethyl methacrylate was performed by using ATP-MTS and cerium (IV) ammonium nitrate (CAN) in aqueous nitric acid (HNO 3 ) to afford hybrid particles (ATP-g-PDMAEMA). Evidence of grafting of PDMAEMA was confirmed by Fourier transform infrared spectroscopy (FTIR), X-ray photoelectron spectroscopy (XPS), and Thermogravimetric Analysis (TGA). The crystal structure of PDMAEMA grafted ATP was characterized by X-ray diffraction (XRD) analysis. Morphology of ATP-g-PDMAEMA was observed by transmission electron microscopy (TEM). The effects of concentration of Ce (IV), HNO 3 , and reaction temperature were examined by determining the percentage of grafting (PG). With other condition kept constant, the optimum conditions were obtained as follows: the reaction temperature was 50°C, Ce (IV) and HNO 3 concentrations were 12.5 mmol/L and 1 mol/L, respectively, when 0.2 g of ATP-MTS, 1 mL of DMAEMA, and 4 mL of aqueous solution were used. © 2015 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2015 , 132 , 42762.
研究领域:
高分子化学
·
材料科学
✓ 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）