COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
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2025
·
IF 5.4
Pingping Zhang,Hengyang Mao,Shouyong Zhou,Mingmin Jia,Lei Zhou,Juan Zhai,Ailian Xue,Meisheng Li,Jing Zhong,Qi Zhang,Yijiang Zhao
The intercalation of inorganic nanofillers into graphene oxide (GO) layers regulates the pore structure of composite membranes , enhancing their application in oil-in-water (O/W) separation. However, the weak bonding between the nanofillers and GO may compromise membrane stability, affecting separation performance. Herein, we present a method for constructing a highly stable one-dimensional (1D) nanorod-intercalated GO composite membrane. The surface carboxyl density of GO was enhanced through modification, and Fe 3 O 4 nanoparticles were grown on the surface of 1D attapulgite (FATP) to adjust the hydroxyl density and roughness. The results indicate that strong interactions are formed between FATP and carboxylated graphene oxide (CGO), enhancing the binding force to −1.38 × 10 4 kcal·mol −1 . Benefiting from the intercalation effect and hydrophilic characteristics of FATP, the composite membrane exhibits a relatively high pure water flux (1630.5 L·m −2 ·h −1 ), hydrophilicity (water contact angle of 63°), and underwater superoleophobicity (underwater oil contact angle of 159°). In the O/W separation process, the composite membrane can effectively repel oil droplets with stable flux and oil rejection of 175.6 L·m −2 ·h −1 and > 98 %, respectively. Furthermore, the membrane exhibits excellent stability with steady permeability remaining approximately 80.2 % of the original value after multiple cycles of operation in diverse acidic and alkaline environments.
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JOURNAL OF WUHAN UNIVERSITY OF TECHNOLOGY-MATERIALS SCIENCE EDITION
·
2025
·Vol. 40
·期 5
·1504-1513
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IF 1.1
Wang Yu,Yan Lisi,Cheng Bo,Yang Jing,Li Binbin,Wang Xinyu
To improve the controlled release ability, we prepared attapulgite into microspheres by spray drying. This research began with a thorough thermogravimetric analysis to optimize attapulgite’s heat treatment for drug loading. By advanced spray drying, attapulgite was transformed into microspheres, refining its drug release characteristics. Various parameters were examined, achieving optimal particle size and morphology at 25% solid content, 2.5% dispersant, and 3% binder. Attapulgite microspheres demonstrated exceptional encapsulation efficiency, exceeding 95% for doxorubicin hydrochloride, highlighting their versatility in drug delivery. FTIR and XRD were used to predict changes in material properties after spray drying. Notably, cytotoxicity tests confirmed the high biocompatibility of attapulgite microspheres, devoid of cell death induction. Attapulgite microsphere loaded with doxorubicin enable sustained drug release and maintain killing ability against tumor cells. This study confirms the viability of spray dried attapulgite microspheres for efficient drug loading and delivery and provides insights for innovative drug delivery systems that utilize the unique properties of attapulgite to advance therapeutics.
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JOURNAL OF POLYMER RESEARCH
·
2026
·Vol. 33
·期 1
·18
·
IF 2.8
Hu Minglei,Zhang Wei,Hu Bin,Chu Fuqiang,Yang Haicun,Cao Zheng
To enhance both the adhesive strength and cohesion of the adhesive resin, attapulgite (ATP) was chemically modified by peroxy groups to parepared ATP with initiation function (ATP-CPO). Subsequently, a series of high density polyethylene/ATP composites (HDPE/ATP) functionalized with maleic anhydride and vinyl trimethoxysilane were prepared via surface-initiated graft copolymerization. The effects of ATP-CPO dosage on the mechanical, thermal, rheological, and morphological characteristics of the composites were evaluated in detail. It was found that the surface functionalization and reactive extrusion process contributed to the nano-scale dispersion of ATP in the HDPE matrix, forming well-compatibilized nanocomposites consisting of HDPE-g-(MAH-co-VTMS), ATP-g-(MAH-co-VTMS), and more complex MAH/VTMS synergistically functionalized ATP-g-HDPE. When the ATP-CPO content was 4%, the composite exhibited significantly enhanced tensile strength, 180° peel strength, and shear strength, which were 1.4, 26.3, and 21.7 times higher than those of pure HDPE, respectively. Concurrently, the composites displayed higher melting and crystallization temperatures. However, the crystallinity decreased slightly, while the thermal stability was significantly improved. The melt exhibited more pronounced non-Newtonian behavior. Compared to the loss modulus, the storage modulus increased more significantly in the low-frequency region, and a non-terminal effect was observed, which enhanced the structural stability of the system under low-frequency shear stress.
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JOURNAL OF POLYMER SCIENCE
·
2026
·
IF 3.9
Jiangtao Guo,Hongxiang Ou,Wenqian Zhou,Honglai Xue,Fang Zhu,Weikang Liu
In this work, a core–shell flame retardant (MF@β-CD) was prepared by coating β-cyclodextrin (β-CD) with melamine-formaldehyde (MF) resin through in situ polymerization. Amino-functionalized attapulgite (ATP-NH 2 ) was also prepared via silane modification. MF@β-CD and ATP-NH 2 were incorporated with piperazine pyrophosphate (PAPP) to fabricate flame-retardant PP composites through melt blending. The incorporation of MF@β-CD and ATP-NH 2 improved the fire performance and thermal stability of PP composites. The PP composite containing the MF@β-CD/ATP-NH 2 system exhibited a limiting oxygen index (LOI) of 33.8% and achieved a UL-94 V-0 rating. Compared with neat PP, the peak heat release rate and total smoke production decreased by 91.9% and 87.7%, respectively. Thermal analysis and char characterization suggested that the MF@β-CD/ATP-NH 2 system promoted the formation of a more continuous and stable char layer during combustion. The MF shell contributed to improved interfacial compatibility between β-CD and the PP matrix, while ATP-NH 2 helped maintain the integrity of the char structure. This work provides a feasible approach for improving the fire safety and condensed-phase stability of PP using bio-based flame-retardant components. Graphical Core–shell structured MF@β-CD was prepared via in situ polymerization and combined with amino-modified attapulgite (ATP-NH 2 ) and piperazine pyrophosphate (PAPP) to synergistically modify polypropylene (PP). The optimized composite achieved a limiting oxygen index (LOI) of 33.8% and a UL-94 V-0 rating. The incorporation of ATP-NH 2 resulted in a distinct lamellar stacking structure on the char residue surface, with the layered silicate sheets of ATP-NH 2 uniformly embedded in the organic char matrix. This enhanced the structural stability and thermal shock resistance of the char layer, preventing its cracking and peeling during high-temperature combustion.
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Science China-Technological Sciences
·
2022
·Vol. 65
·期 12
·2979-2989
·
IF 3.903
Jin JiaSheng,Xia Wei,Hu Pan,Yang Hu
Algae and suspended colloidal particles produced high turbidity in water, weakened water purification, and threatened the safety of the water supply. In this study, a series of composite coagulants (atp-st-CTA) composed of a cationic starch (st-CTA) and attapulgite (ATP) with different fed mass ratios were fabricated by a simple method to coagulate kaolin suspension with initial turbidity of 80.0 NTU and Chlorella suspension with 0.25 mg/L of chlorophyll a ( chla ), respectively. Fourier transform infrared spectroscopy and scanning electron microscopy investigated the structural characteristics of atp-st-CTA. The maximum turbidity and chla removal rates of atp-st-CTA were 92.2% and 100.0%, respectively, at natural pH conditions. The effects of the fed mass ratio of st-CTA to ATP in the composites, dose, pH, and coexisting humic acid on the coagulation performance of atp-st-CTA were comprehensively investigated. Based on the apparent coagulation behaviors, the zeta potentials of the supernatants after coagulation, and the flocs properties, the coagulation mechanisms of atp-st-CTA were discussed in detail. The complete charge neutralization due to st-CTA and the enhanced sedimentation by ATP synergistically removed turbidity and algae from the water efficiently. In short, atp-st-CTA as a talented material has a notable prospect in applications of water treatment owing to its advantages of environmental friendliness, low cost, and high efficiency.
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ANALYTICAL AND BIOANALYTICAL CHEMISTRY
·
2021
·Vol. 413
·期 13
·3529-3540
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IF 4.157
Li Xiangdong,Chen Yihui,Chen Shubing,Hou Chunyan,Xuan Rongrong,Gao Yajie,Ren Shuaijun,Yao Lihui,Wang Tingting,Zhang Lihua,Zhang Yukui
Fluoroquinolone (FQ) residues in foods of animal origin may threaten public health but are challenging to determine because of their low contents and complex matrices. In this study, novel polyethyleneimine-functionalized Fe 3 O 4 /attapulgite magnetic particles were prepared by a simple co-mixing method and applied as hydrophilic sorbents for the magnetic dispersive solid-phase extraction (MSPE) of three FQs, i.e., ciprofloxacin, norfloxacin, and enrofloxacin, from chicken muscle samples. The preparation of the magnetic particles was of high reproducibility and the products could be reused many times with high adsorption capacity. The key experimental factors possibly influencing the extraction efficiencies, including sample solution, extraction time, sample loading volume, desorption solution, desorption time, and elution volume were investigated. Under optimum MSPE conditions, the analytes in chicken muscle samples were extracted and then determined by RPLC-MS/MS in MRM mode. Good linearity was obtained for the analytes with correlation coefficients ranged from 0.9975 to 0.9995. The limits of detection were in the range of 0.02–0.08 μg kg −1 , and the recoveries of the spiked FQs in chicken muscle samples ranged from 83.9 to 98.7% with relative standard deviations of 1.3–6.8% ( n = 3). Compared with the traditional MSPE methods based on hydrophobic mechanism, this hydrophilic interaction-based method significantly simplifies the sample pretreatment procedure and improves repeatability. This method is promising for accurate monitoring of FQs in foods of animal origin. Graphical abstract
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高影响因子
Journal of Environmental Chemical Engineering
·
2021
·
IF 5.909
Siraj Ahmad,Shaohan Lian,Yaxin Tan,Run Li,Quan Zhao,Chunfeng Song,Qingling Liu,Shijian Lu
Mixed matrix membranes (MMMs) have gained significant attention in CO 2 separation. However, the symmetrical dispersion of inorganic filler nanoparticles during MMMs fabrication is still a crucial challenge. The present work investigates the outcome of N-Methyl-2-pyrrolidone (NMP) and N-N-Dimethyl-formamide (DMF) solvents on MMMs texture, perm-selectivity and nanoparticles dispersion. Scanning electron microscopy (SEM), Fourier-transform-infrared (FTIR) and X-Ray Diffraction (XRD) analyses were also performed for membrane characterization. The MMMs fabricated with NMP solvent showed competitive CO 2 permeability (120.20 barrer) and CO 2 /N 2 selectivity (69.31) compared to the membranes prepared with DMF solvent. It has been indicated that the molar volume, boiling point and solubility parameters were significant factors in the solvent selection. Moreover, the effect of operating temperature on gas transport properties showed substantial impact in perm-selectivity, at 3 bar feed-pressure, with the temperature dropping from 40 °C to 0 °C, the CO 2 /N 2 gases selectivity increased from 69.31 to 105.50, equating to a 64.8% decrease in CO 2 permeability.
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FOOD CHEMISTRY
·
2020
·
IF 6.306
Mingxin Niu,Zuopeng Li,Wenjuan He,Wenfeng Zhou,Runhua Lu,Jing Li,Haixiang Gao,Sanbing Zhang,Canping Pan
Herein, we developed a novel magnetic solid phase extraction method based on attapulgite-modified magnetic metal-organic frameworks (ATP@Fe 3 O 4 @ZIF-8), and this method could be used for the determination of benzoylureas when it was coupled with high-performance liquid chromatography. The established method was validated in terms of linearity (2.5–500 μg L −1 , with correlation coefficient (R 2 ) > 0.9994), accuracy (with satisfactory recovery of 88.29–95.99%) and precision (with relative standard deviation (RSD) of less than 8%). In addition, the enrichment factors (EF) ranged from 63.6 to 72.2. Limit of detection (LOD) and limit of quantitation (LOQ) were 0.7–3.2 μg L −1 and 2.3–10.7 μg L −1 , respectively. Moreover, there was hardly any noticeable loss of the extraction efficiency when this extraction method undergoes five cycles. Finally, this method was successfully used for the determination of six benzoylureas in different tea infusions and the determined relative recoveries ranged from 78.8 to 114.3%.
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JOURNAL OF SEPARATION SCIENCE
·
2020
·Vol. 43
·期 12
·2419-2428
·
IF 2.878
Xiaoling Yang,Yiduo Mi,Fang Liu,Jing Li,Haixiang Gao,Sanbing Zhang,Wenfeng Zhou,Runhua Lu
In this work, a novel extraction technique based on the effervescence-assisted dispersion and magnetic recovery of attapulgite/polypyrrole sorbents was developed for determining the concentrations of five pyrethroids in honey samples. The magnetic nanoparticles were synthesized by a one-pot method. Several experimental parameters that affected the extraction efficiency, including the dispersion conditions, pH, ionic strength, and desorption conditions, were investigated. Under optimal conditions, the calibration curves for the five pyrethroids in honey samples exhibited good linearity, with r 2 values ranging from 0.9979 to 0.9990. The limits of detection varied between 0.21 and 0.34 µg/L. Satisfactory recoveries of 81.42–106.73% with intra- and interday relative standard deviations of less than 6.94 and 10.89%, respectively, were obtained. Moreover, the sorbents exhibited acceptable batch-to-batch repeatability in the range of 5.06–15.01%, and each sorbent could be reused for up to four extraction cycles without a significant loss in the extraction recovery.
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Materials Research Express
·
2020
·Vol. 7
·期 6
·065303
·
IF 1.929
Xinqiu Hong,Liming Zou,Yongjing Xu,Yan Vivian Li,Junwei He
Polyvinyl alcohol (PVA)/Attapulgite (ATT) nanocomposite fibers with high strength and high Young's modulus were prepared via gel spinning. The structures and properties of PVA/ATT nanocomposite fibers were investigated with Fourier transform infrared spectroscopy (FT-IR), differential scanning calorimeter (DSC), thermo gravimetric analysis (TGA), x-ray diffraction (XRD), Environmental scanning electron microscope (ESEM), and mechanical testing. The results showed that ATT had a great influence on the structures and properties of PVA/ATT nanocomposite fibers. The melting temperatures, crystallinities, initial decomposition temperatures and maximum decomposition temperatures of PVA/ATT nanocomposite fibers increased firstly when ATT content was increased from zero to 3 wt%, however, they were then dropped when ATT contents were 5 wt% and 7 wt%. The highest melting temperature, crystallinity, initial decomposition temperature and maximum decomposition temperature of PVA/ATT-3 were 240.4 °C, 67.6%, 266.7 °C and 358.6 °C, respectively. Furthermore, ESEM observation indicated that ATT had good adhesion to PVA matrix. Mechanical tests showed that PVA/ATT-3 had the highest breaking tensile and Young's modulus of 12.6 cN/dtex and 301.9 cN/dtex, respectively.
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AIP Advances
·
2019
·Vol. 9
·期 10
·
IF 1.579
Wang Yi,Qin Ziyi,Guo Pengran,Li Yong,Zhang Ting
In this research, attapulgite was used as the carrier base materials for adsorbing phase change materials. By introducing isocyanate (-NCO) and different amino (-NH 2 ) functional groups, ATP was chemically grafted. A series of porous ATP carriers with different pore structures were constructed based on the reactions between functional groups. The composite phase change materials of different ATP porous carriers were prepared by using stearic acid as phase change material. The TEM, FTIR, XPS, XRD, BET, TG and DSC were used to characterize the morphology, chemical structure and thermophysical properties of the prepared samples. The TEM results showed that the ATP carriers demonstrated favourable porous structure. The results of FTIR, XPS and XRD revealed that the characteristic functional groups isocyanate and amino formed joint molecules successfully, and a dealcoholization condensation reaction took place between the ethoxy groups and silicon hydroxyl on the surface of the ATP. Particularly, according to the characterization results, the enthalpy value of the CPCM reduced with the decrease of the pore size of the ATP carriers, it can also be found that the phase transition temperature of the CPCM declined as long as the pore size of the ATP carriers decreased.
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JOURNAL OF APPLIED POLYMER SCIENCE
·
2023
·Vol. 140
·期 44
·e54624
·
IF 3
Shiping Wang,Lushen Shen,Honglin Yang,Guohui Cai,Ganchang Lei,Lijuan Shen,Yingying Zhan,Lilong Jiang
Developing economic controlled-release fertilizers (CRFs) with superior performance is an ongoing and important research area. This work investigated the co-modification of acid-activated attapulgite (ac-AT) to optimize its surface properties for polyurethane (PU) composite applications, specifically in the coatings of CRFs. The modified ac-AT (MAT) rods were obtained through treatment with 2.0 wt.% KH-560 coupling agent and in-situ grafting with stearic acid (SA). Varying the addition amount of SA resulted in the synthesis of different MAT fillers. Along with the adjustment of the filling amount, the properties of the MAT/PU composites were controlled. Notably, applying 1.5 wt.% SA onto the KH-560 treated ac-AT produced MAT with a contact angle of 100.8°, enhancing hydrophobicity and dispersion within the PU matrix. Furthermore, at a filling amount of 9.0 wt.%, the MAT/PU composite exhibited the most favorable properties with a tensile strength of 2.37 MPa, making it the optimal coating for CRFs with 75% nutrient release within 46 days while the coating efficiency was 3.0 wt.%. This co-modification approach shows great potential in enhancing filler properties and promoting their application in organic coatings.
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