PROGRESS IN ORGANIC COATINGS
·
2015
·
IF 2.358
M.R. Islam,M.D.H. Beg,S.S. Jamari
Montmorillonite nanoclays (MNCs) were dispersed into palm oil based polyalkyds for improved thermomechanical and structural properties. Different percentages of MNCs such as 0.5, 1.0 and 1.5 wt.% were loaded into the liquid resin and cured thermally at 120 °C. Ultrasound technique was adopted for better dispersion into the polyalkyds. Dispersion was also carried out during esterification process under situ condition. The properties of nanoclays-loaded composites were characterized by various testing like tensile, pencil hardness, Fourier transform of infrared spectroscopy (FTIR), X-ray diffraction and field-emission scanning electron microscopy (FE-SEM). The hydrophobicity of the samples was analysed by the contact angle measurement. Additionally, the drying property was closely monitored by the FE-SEM observation during different stages of the curing process and discussed with the observed FTIR data. Results analysis revealed that 1.0 wt.% is sufficient to improve the mechanical and thermal properties of the nanocomposites. Additionally, the in situ condition of dispersion was found to be motivational to build better interfacial adhesion between the nanoclays and polymer chains.
研究领域:
材料科学
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
CARBOHYDRATE POLYMERS
·
2021
·
IF 9.381
Kui Hu,Peng He,Zhipeng Zhao,Liulian Huang,Kai Liu,Shan Lin,Min Zhang,Hui Wu,Lihui Chen,Yonghao Ni
It is still a challenge to integrate high sensitivity, mechanical adaptability, and self-powered properties for hydrogels. Herein, we report a conductive polyvinyl alcohol (PVA) hydrogel based on natural nanoclay and cellulose nanofibrils (CNFs). The CNFs and PVA chains could construct a double network structure, resulting in a high mechanical composite hydrogel. Meanwhile, the nanoclay could be well dispersed and immobilized in the network of the hydrogel, thus improving mechanical adaptability of the hydrogel for curved and dynamic surfaces. Moreover, the conductive ions (Al 3+ ) imparted the hydrogel with high conductivity (6.67 S m −1 ) and gauge factor (1.17). Therefore, the composite hydrogel exhibited high sensitivity to tiny pressure changes, enabling recognition of the complicated sounding and handwriting. More importantly, the composite hydrogel possessed self-powered property, which could generate an output voltage of up to 78 mV. In summary, the multi-functional composite hydrogel may have giant applications in artificial electronic skins or wearable devices.
研究领域:
材料科学
·
生物医学工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
MACROMOLECULAR RAPID COMMUNICATIONS
·
2025
·
IF 4.3
Yonggen Zhang,Andeng Liu,Wenzhe Hao,Wenxi Guo,Jun Xu
Flexible wearable electronic devices, capable of real-time physiological monitoring for personalized health management, are increasingly recognized for their convenience, comfort, and customization potential. Despite advancements, challenges persist for soft electrodes due to the skin's complex surface, biocompatibility demands, and modulus mismatch. In response, a mussel-inspired polydopamine-nanoclay-silk fibroin hydrogel (DA-C-SFH) is introduced, synthesized via a two-step process. The initial polydopamine oxidation introduces free catechol groups through polydopamine-incorporated nanoclay, followed by integration with silk fibroin, refining the fibroin network at the mesoscopic scale. This DA-C-SFH exhibits low modulus, high elasticity, adhesive properties, and biocompatibility, enabling conformal skin adhesion. It effectively detects subtle signals, such as pulse waves, and serves as a soft epidermal electrode, capable of recording various electrophysiological signals, including electrocardiograms and electromyograms, thus underscoring its potential in medical electronics and health monitoring applications.
研究领域:
生物材料学
·
医学电子学
·
健康监测技术
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Gels
·
2025
·Vol. 11
·期 4
·287
·
IF 5.3
Hang Zhao,Mengmeng Xie,Siyu He,Saishi Lin,Shige Wang,Xiuying Liu
Rapid industrialization has led to significant environmental challenges, particularly in wastewater treatment, where the removal of heavy metal ions and organic dyes is critical. This study presents the synthesis and characterization of a high-performance hydrogel adsorbent, (nanoclay)x@poly-γ-glutamic acid (γ-PGA)/polyethyleneimine (PEI) hydrogel adsorbent (denoted as NxPP, x = 0, 20, 40, 60, and 80), for the efficient removal of heavy metal ions (Cu2+, Fe3+, and Zn2+) and organic dyes (Methylene blue, as a typical example) from wastewater. The hydrogel was prepared using a one-pot method, combining γ-PGA and PEI with varying amounts of nanoclay. The N80PP hydrogel demonstrated exceptional adsorption capacities, achieving 224.37 mg/g for Cu2+, 236.60 mg/g for Fe3+, and 151.95 mg/g for Zn2+within 30 min, along with 88.18 mg/g for Methylene blue within 5 h. The incorporation of nanoclay significantly enhanced the mechanical properties, with compressive strength reaching 560.49 kPa. The hydrogel exhibited excellent reusability, maintaining high adsorption capacity after five cycles. The adsorption kinetics followed a pseudo-second-order model, and the isotherms fit the Freundlich model, indicating a multilayer adsorption mechanism. This study highlights the potential of NxPP hydrogels as a versatile and sustainable solution for wastewater treatment.
研究领域:
环境科学
·
材料科学
·
化学工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2017
·Vol. 135
·期 12
·46015
·
IF 1.86
Wen Yang,Xiaomin Wang,Shengnan Wang,Wentao Hao
The flexible, strong, and tough white-light-emitting (WLE) hybrid films are highly demanded in large-scale displays, including TV sets, monitors, and electronic interactive devices. In this work, a kind of WLE hybrid film was fabricated from hyperbranched poly(amido amine) (HPAMAM) and nanoclay with the incorporation of riboflavin (VB 2 ) and rhodamine B (RhB). The fluorescence emission of HPAMAM was partially absorbed and effectively transferred into green and red color, which combined into a bright white light with the residue blue fluorescence. Due to the alignment of nanoclay inside the HPAMAM matrix, in addition to the strong interaction among the HPAMAM molecules and that between HPAMAM and nanoclay, this hybrid film shows to be strong and tough. The mechanical strength is about 20 MPa and the elongation is about 30%. It is convinced that this hybrid film is promising in flexible large-scale displays. © 2017 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2018 , 135 , 46015.
研究领域:
材料科学
·
光学
·
高分子化学
✓ 已验证
产品关联
DOI
高影响因子
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
·
2016
·
IF 2.567
Lingyuan Liao,Xiaoya Li,Yin Wang,Heqing Fu,Yongjin Li
Three kinds of nanoclays with different structure and morphology were modified by γ-aminopropyltriethoxysilane (APTES) and then incorporated into Jatropha oil-based waterborne polyurethane (WPU) matrix via in situ polymerization. The effects of surface structure and morphology of nanoclay on the degree of silylation were characterized by Fourier transform infrared spectroscopy (FTIR) and thermogravimetry analysis (TGA). The results showed that the montmorillonite (MT) with abundant hydroxyl group structure and platelet-like morphology had the highest degree of silylation, while the modified halloysite nanotubes (HT) had the lowest grafting ratio. The effects of different silylated clays on the properties of WPU/clay nanocomposites were characterized by scanning electron microscopy (SEM), X-ray diffraction (XRD), TGA, dynamic thermomechanical analysis (DMA) and tensile testing machine. SEM images showed that all silylated clays had good compatibility with WPU and were uniformly dispersed into the polymer matrix. WPU/SMT exhibited the best thermal properties owing to its intercalated structure. Dynamic thermomechanical analysis (DMA), atomic force microscope (AFM), and water contact angle results demonstrated that the silylated nanoclays enhanced the degree of microphase separation, surface roughness, and hydrophobicity of WPU/clay nanocomposites.
研究领域:
高分子材料
·
纳米复合材料
·
表面改性
·
热力学性能
·
功能涂层
✓ 已验证
DOI
高影响因子
CARBOHYDRATE POLYMERS
·
2019
·
IF 6.044
Hui Li,Yunqing He,Jin Yang,Xin Wang,Tianqing Lan,Lincai Peng
We presented a facile method for preparing a food-safe superhydrophobic packaging paper with improved moisture and air barrier properties in this study, which is combining construction of polymer-nanoclay hybrid multilayers with subsequent carnauba wax treatment. The polymer-nanoclay hybrid multilayers consisting of quadlayers of carrageenan (CR)/chitosan (CS)/montmorillonite (MMT)/CS were created using layer-by-layer (LbL) assembly. The surface chemical compositions, potentials and morphologies of the CR/CS/MMT/CS multilayer-modified paper samples were investigated. The paper sample modified with a wax-treated (CR/CS/MMT/CS) 2 multilayer gave a water contact angle of 151.4°. Compared with original paper, this superhydrophobic paper sample showed comparable tensile strength and excellent barrier properties against water vapor and air. Moreover, the obtained paper was used for strawberries packaging at ambient temperature, and it was very effective at reducing the weight loss and maintaining titratable acidity compared with the unpackaged strawberries, which might has a great potential as food packaging materials.
研究领域:
材料科学
·
食品科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
EUROPEAN POLYMER JOURNAL
·
2023
·
IF 6
Changxin Xiang,Qing Zhang,Zijian Guo,Zehua Wang,Weiyi Chen,Xiaona Li,Xiaochun Wei,Pengcui Li
Among various biomaterials, hydrogels are considered as the most attractive tissue engineering material due to their resemblances to extracellular matrix. However, due to the poor mechanical properties, poly(vinyl alcohol) hydrogels are restricted to be applied in load-bearing tissue repair and regeneration. In this work, we designed a series of porous biocompatible composite hydrogels with tough mechanical properties for bone tissue engineering, consisting of poly(vinyl alcohol), trehalose and nano-clay. These novelty hydrogels were prepared by a facile one-pot method. Compositions, microscopic structures, and mechanical properties of hydrogels were investigated in detail. The maximum compressive strength, compressive modulus, tensile strength, elastic modulus, and toughness of hydrogels attained about 2.71 MPa, 0.163 MPa, 0.741 MPa, 0.084 MPa, and 0.94 MJ/m 3 , respectively. These as-prepared hydrogels exhibited the excellent mechanical properties, which were ascribed to the hydrogen bond interactions between molecules and nano-enhancement effect of the nano-clay. Meanwhile, as-prepared hydrogels also exhibited a three-dimensional and interconnected porous microstructure, which facilitated the transport of nutrients to promote cells growth. In addition, the mechanical properties and microscopic structures of hydrogels could be controlled by adjusting the concentrations of trehalose and nano-clay. In vitro cell experiments demonstrated that the hydrogels had good biocompatibility. And hydrogels possessed the excellent ability to induce MC3T3-E1 cells osteogenesis to accelerate bone defects repair. Above illustrated results demonstrated that the potential applications of the hydrogels used as bone tissue engineering materials. Therefore, we anticipated this kind of poly(vinyl alcohol)-based composite hydrogel could develop a new strategy for bone tissue repair
研究领域:
生物材料
·
组织工程
·
材料科学
·
生物医学工程
✓ 已验证
产品关联
DOI
高影响因子
INORGANIC CHEMISTRY
·
2022
·
IF 5.436
Hao Wang,Muhammad Tariq Sarwar,Luyuan Tian,Wenxin Bao,Huaming Yang
Controllable preparation is the current frontier in the field of inorganic nanomaterial-based artificial enzymes (nanozymes). For ferrites, the factors affecting cation occupancy are very complex, making the modulation of cation occupancy extremely challenging. Herein, we report a new strategy to modulate the cation occupancy of manganese ferrite (MFO) based on the structural properties of nanoclay (i.e., montmorillonite K10). It demonstrates that montmorillonite K10 mainly changes the valence state and occupancy of manganese ions in manganese ferrite and not iron ions. K10 increases the proportion of Mn (II) in manganese ferrite and causes more manganese ions to migrate to the tetrahedral sites. As expected, the prepared new inorganic compound possesses excellent enzyme-like catalytic activities and antibacterial functional properties, which are attributed to Mn (II) accelerating Fe (III) reduction and hydroxyl radical formation. Furthermore, steady-state kinetic assays are used to study the reaction mechanism in detail. In vitro and in vivo antibacterial experiments show that the synthesized inorganic compounds exhibit satisfactory disinfection and wound skin recovery efficiencies. This work emphasizes the controllable preparation of new inorganic compounds with biomimetic activity and provides novel insight into the biological effects of inorganic nanomaterials.
研究领域:
材料科学
·
生物化学
·
纳米技术
·
生物医学工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
INORGANIC CHEMISTRY
·
2024
·
IF 4.3
Wenxin Bao,Luyuan Tian,Hao Wang,Aidong Tang,Huaming Yang
Overcoming the intrinsic low activity of most peroxidase mimics under neutral pH is crucial but still extremely challenging for the detection of disease markers in biological samples. Here, we chose nanoclay (i.e., montmorillonite K10, MK10) as a carrier to modulate the structure of Fe1–xS nanozyme components through an interfacial modulation strategy, aiming at breaking the neutral pH limitation of Fe1–xS. MK10 with abundant hydroxyl groups on its surface acts as a carrier to increase the ratio of Fe(II) and S(II−) content in surface Fe1–xS. We verify that Fe(II)-promoted surface hydroxyl radical generation and S(II−)-promoted regeneration of Fe(II) play key roles in endowing peroxidase-like activity to Fe1–xS at neutral pH. As expected, Fe1–xS/MK10 exhibited 11-fold higher Vmax and 52-fold higher catalytic efficiency than bare Fe1–xS. As a proof of concept, the sensor constructed based on Fe1–xS/MK10 achieved colorimetric detection of xanthine under neutral conditions with a linear range of 5–300 μM and a limit of detection of 2.49 μM. Finally, we achieved highly sensitive detection of xanthine in serum using the constructed biosensor. Our contribution is the novel use of a nanoclay-mediated interfacial modulation strategy for boosting the peroxidase-mimicking activity and breaking the pH limitation, which contributes to the in situ detection of disease markers by nanozymes under physiological conditions.
研究领域:
纳米技术
·
生物传感器
·
分析化学
·
材料科学
·
生物医学工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ADVANCED FUNCTIONAL MATERIALS
·
2025
·
IF 19
Cheng-Ye Zhu,Zhao-Yu Ma,Yu-Ren Xue,Chao Zhang,Hao-Cheng Yang,Hong-Qing Liang,Zhi-Kang Xu
Exploiting polyamide membranes with various architectures is highly attractive for improving their nanofiltration performance. However, conventional liquid-based reaction platforms suffer from limited structural tunability and stability owing to their inherent fluidity, making precise control over the reaction process and the membrane architecture challenging. Herein, a facile strategy employing thixotropic nanoclay hydrogel as an interfacial polymerization platform is proposed to fabricate ultrathin, vesicle-like polyamide membranes with enhanced nanofiltration performance. The key to this design lies in not only leveraging the shear-triggered vesicle-patterned hydrogel as a morphological template for polyamide membranes, but also harnessing nanoclay-monomer interactions to retard polymerization kinetics for reducing membrane thickness. The prepared membranes exhibit a 41% enhancement in water permeance while maintaining excellent Na 2 SO 4 rejection above 99%, outperforming most commercial membranes and many reported counterparts. Furthermore, the shear-induced rapid, reversible sol–gel transition allows for the swift construction of uniform, stable, large-area reaction platforms on various substrates, as well as efficient recovery of reaction media and residual monomers, through a simple blade-coating process, suggesting its potential for scale-up. This work establishes a controllable interfacial polymerization platform for modulating polymerization kinetics and morphology of polyamide membranes.
研究领域:
材料科学
·
膜技术
·
高分子化学
·
环境工程
·
纳滤
✓ 已验证
产品关联
DOI
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2023
·
IF 5.2
Xia Du,Lisheng Zhu,Youjie Rong,Xiaomin Zhang,Huijie Li,Jianhua Fei,Xiaobo Huang
In recent years, ion conductive hydrogels based on photocurable 3D printing technology have attracted wide attention in the application of wearable sensors , which greatly simplifies the manufacturing process of devices, while making devices with high sensitivity and high fidelity. However, the current ionic hydrogel network via photocuring 3D printing is mainly crosslinked by covalent bonds . Due to the lack of sufficient energy dissipation and high-functionality cross-links within the network, the gel will inevitably crack after continuous dynamic loading. Here, we designed an organic gel with excellent tear resistance, which is mainly attributed to the high-functionality cross-links constructed by nano-clay containing a large number of hydroxyl groups . Specifically, the precursor of the organic gel is mainly composed of N-methylol acrylamide (NAM), nano-clays, photoinitiator , and water-glycerol binary solvent system. After photocurable printing, lots of hydrogen bonds are formed between nano-clays and poly-NAM network, which not only provides an energy dissipation mechanism for the gel network, but also acts as a nanoscale cross-linking site to resist crack propagation during the stretching of the gel. Under the action of nano-clay, the tear resistance of the gel has been greatly improved. In addition, the sodium ions released by the nano-clay ensure the good ionic conductivity of the gel, verifying its potential as a strain sensor with high sensitivity. What's more, combining skin-like organic gels and 3D printing technology enables the manufacture of highly sensitive sensors much easier and more designable. This study not only provides a method for the preparation of high-precision ionic conductors with excellent tear resistance, but also clears the way for developing a new class of wearable devices and intelligent electronics.
研究领域:
材料科学
·
可穿戴技术
·
3D打印
·
传感器
·
纳米技术
✓ 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）