JOURNAL OF RADIOANALYTICAL AND NUCLEAR CHEMISTRY
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2015
·Vol. 308
·期 1
·155-163
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IF 1.034
Ma Fuyin,Shi Wanlong,Meng Hu,Li Zheng,Zhou Wei,Zhang Lan
An organic–inorganic composite ion exchanger of polyantimonic acid-polyacrylonitrile (PAA–PAN) was synthesized to remove strontium(II) from radioactive waste water. Ion exchange behavior of the composite toward strontium(II) were investigated and the results indicated that the composite presents excellent performance in 0.1 mol L −1 nitric acid. The maximum uptake capacity of strontium(II) can reach up to 49 mg g −1 on composite. Adsorption thermodynamic parameters showed that the ion exchange was endothermic and spontaneous reaction and equilibrium adsorption data fit well with the Langmuir adsorption isotherms. In addition, PAA–PAN beads were found to have chemical and adsorption stability under irradiation and acidic media.
研究领域:
化学工程
·
环境科学
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DOI
高影响因子
Journal of Materials Chemistry B
·
2014
·Vol. 2
·期 19
·2938-2946
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IF 0
Yanqi Zhong,Fengying Dai,Heng Deng,Meihong Du,Xiaoning Zhang,Qingjun Liu,Xin Zhang
Superparamagnetic iron oxide nanoparticles (SPIONs) offer unique properties for magnetic resonance imaging (MRI). Targeting imaging of rheumatoid arthritis in vivo requires a specific, magnetic sensitive and ultra-stable MRI contrast agent. In this study, SPIONs with a preferable colloid stability and optimized size were obtained by using an in situ polyol method with the diblock copolymer PEG-b-PAA acting as a surface ligand. Increasing the degree of polymerization (DP) of PAA from 18 to 36 to 57 led to the decreasing size of the iron oxide nanoparticles from 52 nm to 17 nm to 9 nm, respectively. Folic acid was conjugated onto PEG-PAAx@SPION as a specific targeting molecule for activated macrophages in a rheumatoid arthritis joint. To evaluate the stability and magnetic properties of the particle, a series of tests were conducted to evaluate and optimize the nanoparticles. In vitro endocytosis experiments confirmed the better performance of the folic acid conjugated SPIONs than the non-folic acid modified SPIONs. In vivo MRI clearly demonstrated the significant signal diminishment of the arthritis joint in antigen induced arthritis (AIA) rats by intravenous injection of the optimized nanoparticles FA–PEG-b-PAA36@SPION. These results indicated that FA–PEG-b-PAA36@SPION could serve as a promising candidate for the MRI of rheumatoid arthritis.
研究领域:
医学影像学
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纳米医学
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产品关联
DOI
PubMed
ADVANCES IN POLYMER TECHNOLOGY
·
2017
·Vol. 37
·期 6
·2325-2335
·
IF 1.291
Peng Zhou,Song Wang,ChuanLan Tao,Xingkui Guo,Luhan Hao,Qian Shao,Lei Liu,Ya-Ping Wang,Wei Chu,Bin Wang,Shi-Zhong Luo,Zhanhu Guo
Mesoporous alumina, as a porous, high specific surface area, high activity, and heat stable material, has been widely used as an industrial adsorbent, catalyst, and catalyst support. The modification of alumina with organic polymers has been widely investigated in recent years. In this study, we compared the dependence of the adsorption of a polyelectrolyte, poly(acrylic acid) (PAA) on γ-alumina particles on polymer size via Fourier transform infrared spectroscopy, thermogravimetry, nitrogen adsorption–desorption isotherm analysis, and atomic absorption spectrophotometry. We found that PAA with a hydrodynamic diameter greater than the alumina pore size would only adsorb on the outer surface of the oxides. For polymers with hydrodynamic diameters smaller than the alumina pore size, PAA infiltration resulted in a monolayer coverage of both the outer and inner surfaces of the oxide. Among the three PAA that could infiltrate the alumina pores, the one with the smallest molecular weight showed the highest adsorbed amount on alumina. The temperature, pH, concentration, and ionic strength of the PAA solutions were varied to illustrate the physicochemical differences of the prepared polymer/oxide composite materials. The high PAA-loaded composites were treated with a nickel ion solution, converted to Ni/alumina catalysts, and used in the methanation of carbon dioxide. The Ni/alumina catalysts were analyzed with X-ray diffraction and temperature-programmed reduction to illustrate the structural characteristics. The catalytic CO 2 methanation of the catalyst samples revealed that a solution pH value higher than p K a of PAA favored the formation of catalysts with high catalytic activity.
研究领域:
材料科学
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催化化学
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环境科学
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产品关联
DOI
高影响因子
ACS Applied Polymer Materials
·
2021
·
IF 4.089
Danyang Wang,Lu Qin,Weihu Yang,Ye He,Songyue Zhang,Yulu Yang,Kun Xu,Pengfei Gao,Jinxiu Yu,Kaiyong Cai
The conductive material used in traditional conductive hydrogels is inherently rigid, which makes the material’s mechanical properties poor. In addition, the use of chemical covalent bonds to form gels makes the hydrogel lack self-healing properties, which limits the conductivity and the application of gel. Based on the above reasons, we use the characteristics of the strong trivalent iron ion chelating ability to prepare a PVA/PAA/Fe3+ system three-dimensional network structure hydrogel and design a sandwich structure to encapsulate liquid metal gallium indium tin (GaIn) in the hydrogel. Inside, the strong conductivity of the liquid metal is used while protecting the liquid metal from being oxidized. In addition, we explore its mechanical properties, electrical conductivity, self-healing properties, adhesion properties, antibacterial properties, etc. and prove them by tensile stress–strain mechanic experiments, electrical impedance experiments, strain sensor signal detection, and biological signal detection experiments. The results show that the as-prepared hydrogel exhibited excellent self-healing performance and antibacterial ability and has mechanical properties that fit the elastic modulus of the skin. Compared with traditional Ag/AgCl electrodes, it can detect electrocardiogram and other biological signals very well as well as having long-lasting and repeated use.
研究领域:
材料科学
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生物医学工程
·
传感器技术
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产品关联
DOI
高影响因子
Journal of Materials Chemistry B
·
2014
·Vol. 3
·期 4
·629-634
·
IF 0
Xinhong Xiong,Zhaoqiang Wu,Jingjing Pan,Lulu Xue,Yajun Xu,Hong Chen
Tailoring the surface properties of poly(dimethylsiloxane) (PDMS) is essential for the advancement of its applications. However, the modification process is usually complicated and limited due to the chemical inertness of the surfaces of PDMS. Here, we report for the first time, a facile and versatile method for the functional surface modification of PDMS via visible light-induced grafting polymerization at room temperature. This modification is readily achieved in two steps: (1) covalently integrating alkyl bromine into the PDMS networks using a simple mixing procedure and (2) visible light-induced surface grafting polymerization using Mn2(CO)10. We have demonstrated that the PDMS surface can be functionalized with a wide variety of polymers via covalent grafting, such as poly(trifluoroethyl methacrylate) (PTFEMA), poly(N-isopropylacrylamide) (PNIPAAm), poly(acrylic acid) (PAA) and poly(vinyl acetate) (PVAc). As an example, after the grafted PVAc was transformed into its hydrophilic analogue poly(vinyl alcohol) (PVA), anti-biofouling functionalization of PDMS was obtained. The anti-biofouling properties of the functionalized PDMS were demonstrated using cell adhesion and bacterial adhesion tests. Moreover, the grafting kinetics of PVAc showed that this process was fast and efficient.
研究领域:
材料科学
·
聚合物化学
·
表面工程
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DOI
PubMed
POLYMER
·
2025
·
IF 4.5
Yuxuan Zhang,Pengyu Yang,Mengyun Shen,Yuanyuan Lu,Zaosheng Lv,Yanfen Huang
Fog, a ubiquitous natural phenomenon, wreaks havoc on medical and transportation sectors, spurring an intense quest for cutting-edge anti-fog coatings. This study introduced an interpenetrating polymer network (IPN) structure into polyacrylic acid (PAA), addressing the issue of high swelling ratio in PAA. This enhanced the mechanical properties of the hydrogel, thereby improving light transmittance and endowing the PAA-based superhydrophilic coating with anti-fog functionality. By incorporating nano-SiO 2 particles into this polymer solution, we developed an organic-inorganic composite anti-fog coating. This coating inherently exhibits high light transmittance (95 %). At a nano-SiO 2 content of 10 %, the coating demonstrates resistance to temperatures as low as −70 °C (transmittance 91.7 %) and acid resistance (transmittance 90.7 %). It maintains excellent anti-fog performance after rice abrasion testing and cyclic anti-fog testing. Additionally, the prepared anti-fog superhydrophilic coating possesses antibacterial properties (99 % inhibition rate).
研究领域:
材料科学
·
高分子化学
·
表面涂层技术
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纳米材料
·
功能材料
✓ 已验证
产品关联
DOI
高影响因子
FirePhysChem
·
2026
·
IF 3.6
Handong Shi,Shijiao Li,Chuanhao Xu,Kai Han,Fan Liao,Yanpeng Lv,Guoqiang He,Wenxuan Liang,Chongwei An
This work presents a molecular-to-structural strategy for fabricating high-performance CL-20-based composite energetic materials using direct ink writing (DIW). A poly(vinyl alcohol)/poly(acrylic acid)/modified potassium titanate whisker (PVA/PAA/ M-PTW) interpenetrating polymer network (IPN) was designed to simultaneously enhance mechanical strength and reduce mechanical sensitivity. The hydrogen bonding–covalent crosslinking–filler reinforcement mechanism ensured uniform dispersion of CL-20 crystals and strong interfacial adhesion within the polymer matrix. Surface modification of PTW with 5 wt% KH-550 improved compatibility with the IPN, yielding printed structures with excellent form accuracy and adhesion to aluminum substrates (0.961 MPa). The optimized composite exhibited high compressive strength (16.77 MPa) and reduced impact and friction sensitivities compared with ε-CL-20 and submicron CL-20 samples. It achieved stable detonation wave transmission within a 90°-160° corner range in a 1.2 × 1.2mm charge slot, with the critical detonation size reaching 0.3m × 0.3mm. The measured detonation velocity of 7267.9m/s (83.2% of theoretical). These results demonstrate that the DIW-based PVA/PAA/M-PTW system enables the precise construction of high-strength, low-sensitivity energetic composites with reliable detonation performance, providing a promising pathway for advanced micro-scale energetic devices.
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产品关联
DOI
高影响因子
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2025
·
IF 8.5
Shu He,Zhiyue Cui,Hongli Fang,Xinyu Wei,Wei Shao
Recent advancements in conductive hydrogels have demonstrated significant progress in flexible sensing applications. However, integrating multifunctionality—including mechanical properties, environmental stability, high sensitivity, and great self-healing capability—into hydrogel sensors via a simple and eco-friendly synthesis approach remains a challenge. Herein, we reported multifunctional polyvinyl alcohol (PVA)/polyacrylic acid (PAA)/agarose (AG) hydrogels fabricated through a facile one-pot strategy. The dual-crosslinked network, enabled by AlCl₃ (physical crosslinker) and sodium tetraborate decahydrate (chemical crosslinker), synergistically enhanced structural integrity. Incorporation of carboxyl graphene oxide (GO-COOH) optimized mechanical strength (the fracture stress of 122.3 kPa) and electrical conductivity (10.56 ± 0.63 S/m). The hydrogel strain sensor exhibited exceptional sensitivity (gauge factor = 11.31 within 400–550 % strain), enabling precise monitoring of both large-scale motions (e.g., joint flexion) and subtle movements (e.g., facial expression). Notably, GO-COOH endowed the hydrogel with a rapid photothermal response, expanding its utility to photothermal sensing. Moreover, the dynamic borate ester bonds, metal coordination bonds and hydrogen bond interactions conferred 100 % self-healing efficiency, significantly prolonging the operational lifespan of the hydrogel sensor. This work presents a scalable, green synthesis route for multifunctional hydrogels, demonstrating broad potential in wearable health monitoring, environmental sensing, and human-machine interfaces.
研究领域:
材料科学
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生物医学工程
·
传感技术
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CEMENT AND CONCRETE RESEARCH
·
2025
·
IF 13.1
Gang Qiao,Yuyang Zhao,Pan Wang,Dongshuai Hou,Binmeng Chen
Interface between calcium silicate hydrate (CSH) and polymers is crucial for the mechanical properties and durability. However, direct experimental determination of interfacial mechanics at nanoscale has not been reported. Herein, atomic force microscopy (AFM) with grafted Poly (1-vinylpyrrolidone- co -acrylic acid) (PVP-co-PAA) on AFM tips were utilized to measure interfacial properties between CSH and PVP-co-PAA under four C/S at nanoscale. The interfacial force curves were clearly presented for the first time. Results showed that compared to as-received tip, representing SiO 2 , the adhesive force and energy dissipation increased by 72.42 % and 417 %. Interface separation speed was delayed by 300 % ∼ 400 %. Molecular simulations of interfacial separation aligned with AFM experimental results, where interfacial ion-pair, dynamics stability and polymer conformational changes provided insights for AFM experiment on adhesion force and delay of interface separation speed. Determination of interfacial mechanics by AFM experiment and insights by molecular simulation decoded CSH/PVP-co-PAA interfaces thoroughly.
研究领域:
材料科学
·
纳米技术
·
表面化学
✓ 已验证
产品关联
DOI
高影响因子
COMPOSITES COMMUNICATIONS
·
2021
·
IF 6.617
Lu Wu,Yunping Hu,Ping Tang,Hai Wang,Yuezhen Bin
Graphene and its derivatives are considered as one of the most promising functional materials due to their excellent mechanical and electrical properties. Here, we successfully prepared uniform and long-term stable reduced graphene oxide (rGO) dispersion using sodium carboxymethylcellulose (CMCNa) as a stabilizer creatively, and fabricated rGO/CMCNa/polyacrylic acid (PAA) conductive composite hydrogel. The optimal elongation at break of the cylindrical composite hydrogel (1 cm in diameter and 4 cm in length) could reach 1200% at a tensile rate of 50 mm/min. The swelling rate of the composite hydrogel in alkaline environment was much higher than that in acidic environment, indicating excellent pH sensitivity. More importantly, the conductivity of the composite hydrogel could be increased by about 2500% and reached 0.56 S/m due to the construction of the rGO conductive network. The strain sensor based on the rGO/CMCNa/PAA hydrogel showed a wide region of linear response to deformation, up to a strain of 300%. It also exhibited good performance in other aspects, including low hysteresis, a GF value of 1.0, a short response time of 187 ms, and satisfactory stability and repeatability of 2000 cycles at 50% strain. In particularly, the strain sensor could be well adhered to skin without any other adhesives as soft human-motion sensor for real-time and accurate detection of both large-scale and subtle human activities, indicating a great application potential in electronic skin and human health detection.
研究领域:
材料科学
·
生物医学工程
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF BIOMATERIALS SCIENCE-POLYMER EDITION
·
2020
·
IF 2.69
Yizhu Cheng,Yinchun Hu,Mengjie Xu,Miao Qin,Weiwei Lan,Di Huang,Yan Wei,Weiyi Chen
Poly (vinyl alcohol) (PVA) hydrogel has been considered as promising cartilage replacement materials due to its excellent characteristics such as high water content, low frictional behavior and excellent biocompatibility. However, lack of sufficient mechanical properties and cytocompatibility are two key obstacles for PVA hydrogel to be applied as cartilage substitutes. Herein, Polyacrylic acid (PAA) has been introduced into PVA hydrogel to balance these problems. Compared with pure PVA hydrogel, PVA/PAA hydrogel has the equal excellent biocompatibility, and its cell adhesion is significantly improved. In order to further improve the mechanical properties of hydrogels, Cold-Drawn treatment of hydrogels is performed in this paper. Compared to pure 12% PVA hydrogel, 40.8‐fold, 50.8‐fold, and 46.8‐fold increase in tensile strength, tensile modulus, and toughness, respectively, which can be obtained from 12% PVA/PAA Cold-Drawn hydrogel. These biocompatible composite hydrogels have a great application potential as cartilage tissue substitutes.
研究领域:
生物材料学
·
组织工程学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
SOLAR ENERGY MATERIALS AND SOLAR CELLS
·
2020
·
IF 6.984
Zilu Liu,Bingtao Tang,Shufen Zhang
Polyethylene glycol (PEG)/poly Acrylic acid (PAA)/silica (SiO 2 ) composite phase change materials (PCMs) with strong shape stability were successfully synthesized by a simultaneous sol-gel reaction, and in situ free radical polymerization . The network structure, shape stability, phase change enthalpy , and thermostability of the prepared materials were characterized through FT-IR, DSC , TGA , and XRD . The synthesized PEG/PAA/SiO 2 composite PCMs with a semi-interpenetrating network (semi-IPN) exhibited a high phase change enthalpy of 172.9 J/g and strong shape stability under 355 °C. The interaction between PEG and PAA/SiO 2 network was also discussed in this paper, as well as the relationship between the interaction, energy density , and shape stability. The prepared PEG/PAA/SiO 2 composite PCMs provided a novel method in preparing shape stable phase change materials.
研究领域:
材料科学
·
能源存储
·
化学工程
✓ 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）