Materials Today Communications
·
2025
·
IF 4.5
Zhe Tu,Hongxiang Ou,Yining Ran,Honglai Xue,Fang Zhu
The synthesis of a multifunctional flame retardant that combines flame retardancy, smoke suppression, and toughening effects is essential for expanding the range of applications for polyolefins. Inspired by the superhydrophobicity and low surface energy due to the lotus leaf micro/nano hierarchical structure, in this paper, we constructed 2D-3D heterogeneous ZIF-67@MMT by growing ZIF-67 in situ on the surface of montmorillonite (MMT) layers using wet chemistry. Mismatch engineering and micro/nano-graded heterogeneous structure confer high dispersibility and a high specific surface area on MMT, thus optimizing the pore structure and catalytic activity. Polypropylene (PP) composites with 25 wt% intumescent flame retardant (IFR) and 3 wt% ZIF-67@MMT achieved a 32.1 % limiting oxygen index and a UL-94 V-0 rating. 3ZIF-67@MMT/IFR/PP showed a 93 %, 86 %, and 66 % reduction in peak heat release rate, total smoke production, and CO production, respectively. In addition, ZIF-67@MMT has good interfacial compatibility and mechanical interlocking with PP. The tensile strength and elongation at break of 3ZIF-67@MMT/IFR/PP were increased by 58 % and 64 %, respectively, compared to 2MMT/IFR/PP. This work provides an effective strategy for the design of multifunctional heterogeneous nanomaterials for fire safety and other potential applications.
研究领域:
材料科学
·
火灾安全工程
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Electronic Materials
·
2022
·
IF 4.494
Yunlong Li,Xiubin Xu,Lijian Zhao,Danfeng Yu,Yanting Chen,Liangliang Du,Xu Wu
Hydrogels are considered as an ideal material for bioelectronic devices to fulfill the requirements of various applications. However, integrating self-adhesion properties, high stretchability, good sensing performance, and direction-aware functionality into a single hydrogel strain sensor remains a significant challenge and has been seldom reported. In this study, through the characteristics of montmorillonite (MMT) adsorption, we designed a gradient intersecting strategy based on bifunctional MMT nanoparticles. These nanoparticles act as both cross-linking agents and conductive components to strongly intersect the hydrogel and the conductive networks, preventing them from sliding against each other. Thus, the hydrogel sensor had a wide range of adjustable mechanical properties and good adhesion on various substrates. Moreover, the hydrogel sensor can detect both large- and small-scale human activities and achieves direction awareness. Importantly, the hydrogel sensor can be used to construct a wireless sensor system to monitor human movement in real time. This work provides a strategy for the design of the next-generation flexible strain sensors and a method for the development of multifunctional MMT materials, expanding the application of both MMT materials and hydrogel sensors.
研究领域:
材料科学
·
生物医学工程
·
纳米技术
·
传感器技术
·
柔性电子
✓ 已验证
DOI
高影响因子
Biomaterials Advances
·
2022
·
IF 0
Xiaofang Wu,Kai Chen,Qi Chai,Siyu Liu,Cunao Feng,Linmin Xu,Dekun Zhang
There is an urgent need for vascular scaffolds as a treatment option for cardiovascular diseases in the clinic. Here, we developed a simple and effective method to fabricate vascular scaffolds by direct 3D printing in air with gelatine (Gt) - alginate (Alg) - montmorillonite (MMT) nanocomposite bioinks. This work includes the optimization of key 3D printing parameters and the characterization of microscopic morphology, physicochemical properties, mechanical properties and preliminary biological properties. Successful 3D printing of linear and branched vascular scaffolds showed that the addition of nano-MMT improved the printability and shape accuracy. Scanning electron microscopy revealed that the inner and outer surfaces of the vascular scaffolds exhibited interconnected microporous structures favourable for nutrient delivery and cell infiltration. Axial and radial tensile tests indicated that the tensile strength and elastic modulus were similar to those of the native artery. The burst pressure of Gt-4%Alg-MMT was also in good accordance with the physiological pressure of natural blood vessels. In addition, a haemolysis test demonstrated that the haemolysis rate of Gt-4%Alg-MMT matched the gold standard of blood vessel substitution. A Live & Dead stain and a CCK-8 test confirmed the safe applicability of Gt-Alg-MMT as a biomaterial. Overall, the 3D-printed vascular scaffolds are promising candidates for in situ vascular tissue regeneration.
研究领域:
生物医学工程
·
材料科学
·
组织工程
✓ 已验证
DOI
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
·
2018
·Vol. 26
·期 1
·215-226
·
IF 2.8
Zhang Juan,Khan Muhammad Asim,Xia Mingzhu,Abdo Abdelnasir Mahmoud,Lei Wu,Liao Chuan,Wang Fengyun
A highly resourceful, eco-friendly, and recyclable magnetic adsorbent based on montmorillonite (CoFe 2 O 4 /MMT) was fabricated via a facile hydrothermal method to harvest tetracycline (TC) and ciprofloxacin (CIP) from pollutant water. The prepared adsorbent was characterized by XRD, FT-IR, SEM, and VSM methods to comprehend its structure, morphology, and magnetism. Effects of experimental parameters including solution pH, adsorption time, initial concentration, and ion strength were studied in details. The experimental adsorption data of TC and CIP fitted into pseudo-second-order kinetic model and Langmuir isotherm, respectively. The maximum adsorptions of TC and CIP could reach up to 240.91 and 224.00 mg/g. The thermodynamic study indicates that the adsorption process is spontaneous. In addition, the antibiotics can be further degraded under visible light environment and the magnetic sorbent can also be thermally regenerated.
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研究领域:
环境科学
·
材料科学
·
化学工程
·
分析化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
POLYMER DEGRADATION AND STABILITY
·
2025
·
IF 7.4
Xin Li,Zhendong Huang,Ruiyang Dou,Qiang Liu,Wei Huang,Chunxia Zhao,Jianguo Deng,Hongbing Chen
Aerogels hold great promise for various applications. However, conventional aerogels exhibit low hydrophobicity, making them prone to moisture absorption in humid environments, which adversely affects their thermal insulation and mechanical performance. In this study, we introduce an innovative approach to solve this problem by utilizing polycarbonate waste as raw materials to fabricate waterproof aerogels towards external thermal insulation. The incorporation of DOPO-MMT not only accelerates gelation and enhances mechanical strength but also imparts self-extinguishing behavior during combustion. The obtained aerogel possesses a super high static contact angle exceeding 160°, which enables the aerogel to maintain a stable thermal conductivity of 0.039 W m⁻¹ K⁻¹ even after a 7-day immersion in water. Notably, the aerogel retains its hydrophobicity under harsh conditions, including exposure to strong acids and bases. This approach of using waste materials to manufacture aerogels demonstrates the potential of recycled materials in the development of high-performance materials, offering a new technological pathway to address plastic pollution and enhance industrial energy efficiency. This method provides promising application prospects for future insulation materials, particularly suitable for fields such as construction, aerospace, and automotive industries, where high demands are placed on waterproofing, flame retardancy, and mechanical performance.
研究领域:
材料科学
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环境科学
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
Catalysis Science & Technology
·
2022
·Vol. 12
·期 21
·6495-6506
·
IF 6.177
Chao Peng Fu,Qi Ming She,Riccardo Tesser,Chun Hui Zhou
Efficient conversion of glycerol, an inevitable by-product in the transesterification process producing biodiesel, to acrylic acid (AA) and 1,2-propanediol (1,2-PDO) via a cleaner process is attractive and challenging. In this work, the simultaneous production of AA and 1,2-PDO from glycerol over Cu2O/acid-activated montmorillonite (Cu2O/MMT-H) catalysts without external oxygen and hydrogen was first reported. A 100% conversion of glycerol, 72% selectivity to AA, and 10% selectivity to 1,2-PDO were obtained under optimal conditions. The nanostructure and chemical state of Cu2O and MMT-H played important roles in the conversion of glycerol. The corresponding mechanism for the oxydehydration and hydrogenolysis of glycerol to AA and 1,2-PDO over the Cu2O/MMT-H catalysts was proposed. Dehydration of glycerol occurred at the primary carbon to form acetol which was subsequently hydrogenated to form 1,2-PDO. Acrolein was obtained by a dehydration reaction of glycerol at secondary carbon, followed by the oxidation of acrolein to AA. The Cu2O/MMT-H-150 catalysts were reused three times without significant deactivation and structural changes. This work provides a new route for producing AA and 1,2-PDO simultaneously from glycerol in a one-pot way.
研究领域:
化学工程
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催化反应
·
绿色化学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE
·
2021
·Vol. 56
·期 34
·19253-19266
·
IF 4.22
Wang Xiong,Kang Wenqian,Li Guangquan,Zhang Pingsheng,Jia Huiqing,Gao Dujuan
The preparation of organic/inorganic hybrid materials has been proven to be an effective method to overcome the drawbacks of organic or inorganic materials. In this paper, porous organic polymer/montmorillonite (POP/MMT) hybrid materials by in situ intercalative radical polymerization were synthesized for metallocene catalyst support, and the prepared POP/MMT hybrid supports obtained excellent particle flowability with tunnable bulk density (0.20–0.40 cm 3 /g) and specific surface area (SSA) (100–350 m 2 /g) suitable for polyolefin catalysts. N 2 sorption porosity, TGA, IR, XRD, SEM characterization were conducted to evaluate the POP/MMT hybrid supports, and the results showed that the MMT sheets could be well-dispersed in the POP matrix through in situ intercalative polymerization when 80% DVB was used, and when DVB/HEMA with 3:1 molar ratio was added, the prepared POP/MMT hybrid support POP-7 (331 m 2 /g) gained excellent particle flowability and single peak of particle size distribution. Ethylene polymerization results exhibited that the POP/MMT supported metallocene catalysts could obtain better polymerization performance than MMT and silica gel-supported catalysts. The hybrid support POP-4 based metallocene catalyst achieved the highest polymerization activity of 8019 kg PE/mol Zr.bar.h and productivity of 1136 g PE/g cat.h with the produced PE bulk density of 0.27 g/ml. POP-4 supported metallocene catalyst obtained increased productivity of 2300 g PE/g cat.h and bulk density of 0.32 g/ml in higher ethylene partial pressure of 6 bar, and gained stable polymerization kinetics in 80 °C with no obvious decay. Furthermore, the pore structure played a significant effect on the molecular weight and molecular weight distribution by nanoconfined polymerization, and larger molecular chains could be produced on the POP/MMT supported catalysts with smaller nanopore size. Graphical abstract
研究领域:
材料科学
·
催化化学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF DISPERSION SCIENCE AND TECHNOLOGY
·
2023
·
IF 2.2
Yuanping Zhang,Boyu Ma,Xinlei Jia
Melamine polyphosphate (MP), a halogen-free flame retardant was utilized to prepare flame retardant enhanced montmorillonite (MP-MMT), which was introduced into polymethyl methacrylate (PMMA) by emulsion polymerization to improve its heat resistance and flame retardancy. The decorated PMMA were characterized by SEM, FTIR, XRD, and XPS, indicating that MP-MMT/PMMA composites were successfully prepared. The resulting composites exhibited excellent heat resistance, the temperature at maximum weight loss rate was increased from 360 °C to 377 °C, and the char residue at 500 °C was increased to 1.93%. In addition, the LOI value of PMMA composite system was increased from 17.2% to 22.4%, and MP-MMT/PMMA-3 achieved UL-94 V-1 rating. Compared with pure PMMA, the total heat release and peak heat release rate of MP-MMT/PMMA were reduced by 23.0% and 32.4%, respectively. The total smoke release of the optimal flame-retardant PMMA resin decreased by 22.1%, the CO production increased slightly, and the CO2 production decreased significantly. This indicates that the incorporation of MP-MMT has a good effect on flame retardancy. Finally, the flame retardant mechanism of MP-MMT to inhibit PMMA combustion was analyzed. The intercalation modification of MMT is potentially valuable for flame retardant studies of PMMA.
研究领域:
材料科学
·
高分子化学
✓ 已验证
产品关联
DOI
高影响因子
ChemNanoMat
·
2024
·Vol. 10
·期 8
·e202400240
·
IF 2.6
Xuetong Xu,Xu Jia,Cong Liu,Jiaolong Qiao,Fuying Wang,Liuxue Zhang,Dan Yang,Yuan Zhang,Xiulian Wang
The photocatalytic hydroxylation of benzene to phenol is an important reaction for the synthesis of fine chemicals and pharmaceuticals. However, the development of efficient and selective photocatalysts for this reaction remains a challenge. Here, a highly active and selective Fe-MOF/2D-montmorillonite (Fe-MOF/MMT) photocatalyst was prepared via an in-situ method for the hydroxylation of benzene to phenol under the visible light irradiation. The Fe-MOF/MMT composite exhibited excellent photocatalytic performance, with phenol yield of 30.3 % and benzene selectivity of 96.5 % within 4 hours. The high activity and selectivity of the Fe-MOF/MMT photocatalyst were attributed to the synergistic effect between the Fe-MOF and MMT, as well as the unique 2D structure of MMT, which facilitated charge separation and transfer. The Fe-MOF/MMT composite also showed good stability and re-used without significant decrease of activity. This study demonstrated that the potential of Fe-MOF/MMT as a highly efficient and selective photocatalyst for the hydroxylation of benzene to phenol and provided an insight into the design of advanced photocatalysts for sustainable chemical synthesis.
研究领域:
材料科学
·
环境化学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2022
·Vol. 139
·期 26
·e52464
·
IF 3.057
Yingjie Song,Guangyi Lin,Lin Zhang,Chuanbao Geng,Qiao Li,Hong Wang,Fumin Liu,Zhenning Liang,Yuan Jing,Yong Li
The wear resistance of rubber composite materials has always been the focus of research. The wear resistance will not only affect the service life of products and the safety of equipment, but also have an important impact on the environment. In this work, the preparation and properties of wear-resistant rubber nanocomposites based on natural rubber (NR) were studied. It is dedicated to improving the wear resistance of NR composites. On this basis, the dispersibility of montmorillonite (MMT) hybrid materials in NR-based rubber composites was explored. SiO 2 @MMT, SiO 2 @MMT@KH560, PDA@GO, and MMT@GO hybrid materials were prepared, and the hybrid materials were applied to the NR/butadiene rubber (NR/BR) system, and NR/BR/hybrid material composite materials were successfully prepared. The results show that the interlayer spacing of MMT in hybrid materials increases, which effectively improves the dispersibility of MMT in rubber matrix. The tensile strength of NR/BR/MMT@GO composite material increased by 12%, the elongation at break increased by 25%, the DIN abrasion decreased by 16.5% compared with the optimum wear rubber formula, and the wear resistance was greatly improved. This work provides a feasible way for the design of functional polymer composites.
研究领域:
材料科学
·
高分子化学
✓ 已验证
产品关联
DOI
高影响因子
ENERGY
·
2018
·
IF 4.968
Lin Li,Dawei Tang,Yongchen Song,Bo Jiang,Qian Zhang
In this work, a ceria promoted Ni-based catalyst supported in mesoporous montmorillonite (MMT) was developed and evaluated in ethanol steam reforming . This Ni-Ce/MMT catalyst was synthesized by an ultrasound assisted cation exchange impregnation method and characterized by X-ray diffraction, N 2 adsorption–desorption, H 2 temperature-programmed reduction and transmission electron microscopy. TEM images of Ni-Ce/MMT presented that narrow Ni nanoparticles (av. 6.0 nm) were uniformly deposited within the mesoporous MMT support. This was attributed to the strong interaction between Ni and ceria and the confinement effect from the framework of MMT support. The catalytic activity and stability of Ni-Ce/MMT were studied in steam ethanol reforming and compared with Ni/MMT. The higher ethanol conversion and H 2 selectivity of Ni-Ce/MMT demonstrated the addition of ceria facilities the reaction of ethanol steam reforming. Additionally, the ethanol conversion was much more stable on Ni-Ce/MMT than on Ni/MMT during a long-term ethanol steam reforming reaction, illustrating that the catalyst deactivation was preferably suppressed with the help of ceria. In short, the Ni-Ce/MMT is a promising catalyst for ethanol steam reforming owing to the remarkable effect of ceria as well as the confinement effect of MMT support which can effectively suppress the Ni sintering and carbon deposition .
研究领域:
化学工程
·
催化材料科学
✓ 已验证
产品关联
DOI
高影响因子
NANO
·
2018
·
IF 1.1
Rong Shen,Yichang Yu,Yue Wang,Zhining Xia
The cetyltrimethyl ammonium bromide (CTAB)-modified montmorillonite (MMT) was synthesized via a novel “dissolution and reassembly” method. To determine the optimal formula, the adsorption of C.I. Reactive Red 2 (X3B) with CTAB/MMT was investigated. The optimal CTAB/MMT nanocomposite was used to remove 2,6-dichlorophenol and p-nitrophenol from aqueous solutions. The adsorption results can be described by Langmuir isotherm, and the adsorption capacities were 200 mg/g and 125 mg/g for 2,6-dichlorophenol and p-nitrophenol, respectively. To realize the quick separation and recycle, the magnetic CTAB/MMT was further strategized and synthesized. The adsorption equilibrium time was 15 min for both contaminants; the ions’ strength showed a little bit of influence on the adsorption performance. In addition, compared with acidic condition, neutral condition was more beneficial to the adsorption reaction. Due to the addition of Fe 3 O 4 , the adsorption capacities of this magnetic nanocomposite for 2,6-dichlorophenol and p-nitrophenol were a little bit decreased, which were 170 mg/g and 91 mg/g, respectively. However, the magnetic nanocomposite can be separated within 30 s under an external magnetic field, which would be useful in the practical application.
研究领域:
环境科学
·
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）