DIAMOND AND RELATED MATERIALS
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2025
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IF 5.1
Jianhua Zhou,Shuang Ao,Kai Lu,Anguo Xiao
The multifunctional electromagnetic interference (EMI) shielding materials have become more and more indispensable due to serious electromagnetic radiation pollution and harsh wild environments. Herein, hydrophobic MXene/CNTs/oxidized sodium alginate/collagen (MCAC) composite aerogel with excellent EMI shielding, Joule heating and thermal insulation performance was prepared via unidirectional freeze-drying and dip-coating with PDMS. The 1D 2D conductive network between MXene and CNTs endowed hydrophobic MCAC composite aerogel with high electrical conductivity (178.45 S/m), excellent EMI shielding effectiveness (61.47 dB at a thickness of 2 mm) and low-voltage-driven Joule heating (up to 90 °C at 6 V). Furthermore, hydrophobic MCAC composite aerogel also exhibited superhydrophobicity (contact angle of 157.2°) and extraordinary thermal insulation performance. This work provides a forward-looking idea for building multifunctional EMI shielding materials with superior EMI SE, which have potential applications in aerospace, portable electronic devices, and defense industries.
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INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
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2025
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IF 8.5
Yajie Yue,Yawen Zhang,Yulin Wang,Xiaoning Wei,Yong Fang,Kasim Sakran Abass,Shu Qin,Xu Jing
A method of sodium alginate-fortified emulsive liquid-liquid microextraction (FELLME) combined with ultra-high performance liquid chromatography was developed to detect succinate dehydrogenase inhibitor (SDHI) fungicides in water, juice, and wine. The oleic acid as extractant and sodium alginate solution as emulsifier were mixed to form an emulsion to extract SDHIs. Subsequently, it was demulsified by adding magnesium sulfate solution as a demulsifier. All extractants, emulsifiers, and demulsifiers were natural products derived from seaweed. As a long-chain fatty acid, oleic acid exhibits strong hydrophobic properties that can enhance pesticide extraction; however, its application as an extractant in ELLME is limited. Sodium alginate has hydrophilic and hydrophobic groups and a three-dimensional network structure, which can enhance the emulsification process, improve the compatibility of green solvents with ELLME. The pretreatment process does not require complex equipment, including vortex, ultrasound, and centrifuge for extraction and separation. The possible extraction mechanism was analyzed through theoretical calculations. The limit of detection and quantification were 0.1–0.3 and 0.4–1.0 ng mL −1 , respectively. The recoveries were 80.1 %–95.3 %, and the relative standard deviations were 1.5 %–7.2 %. This fortified method is anticipated to expand the applications of ELLME in pesticide analysis of food samples.
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高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2025
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IF 2.8
Yingxin Ji,Keyi Wang,Ruixue Zhang,Gang Zhao
Biomimetic artificial muscles (BMAMs), owing to their flexibility, deformability, and high controllability, hold great promise for applications in underwater robotics, wearable devices, and intelligent bionic systems. However, conventional fabrication processes rely on synthetic polymers, which pose challenges such as environmental pollution and limited biocompatibility. To simultaneously promote the sustainable exploitation of marine resources and ensure environmental sustainability, this study employs natural sodium alginate as the primary raw material for the fabrication of BMAMs. By incorporating materials with enhanced electrical properties through doping techniques, the performance of the actuators is improved. Furthermore, a gel-linked cold-pressing assembly method based on a preformed actuating membrane solution is proposed to optimize the interfacial bonding quality between the electrode membrane and the electroactive membrane. The composite electrode membranes were systematically characterized using FIB-SEM and CV, and their mechanical performance was evaluated through force output tests. Experimental results demonstrate that the gel-linked cold-pressing technique significantly improves the output force, force density, and response rate of the BMAM, with maximum enhancements of 189.56%, 175.07%, and 160.11%, respectively. Additionally, a multidimensional evaluation system based on maximum output force, force density, and response rate was established to comprehensively assess the mechanical performance of the BMAM under various working conditions.
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COLLOID AND POLYMER SCIENCE
·
2025
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IF 2.3
Han Yuxuan,Yuan Yizhong,Sun Jinyu,Tian Xiaohui,Yu Huimei
The treatment of dye wastewater necessitates efficient and sustainable adsorbents. In this study, a novel sodium alginate/carrageenan/montmorillonite@carboxymethyl cellulose nanofiber (SA/CRG/MMt@CMCNF) core-shell hydrogel, containing abundant adsorption sites, was synthesized via a facile ion-crosslinking method for effective methylene blue (MB) removal. The surface characteristics including morphology, functional groups, and pore distribution of the SA/CRG/MMt@CMCNF hydrogel were analyzed. FTIR, BET, and XPS analyses revealed that the addition of MMt provided more adsorption sites. The composite hydrogel exhibited a maximum adsorption capacity of 228.83 mg·g − 1 under optimal conditions and was well-described by both the pseudo-second-order kinetic model and Langmuir isotherm model. Furthermore, it maintained 75% MB removal efficiency after five adsorption cycles. To our knowledge, this study introduces the first incorporation of CMCNF and MMt into the SA/CRG composite system to form a core-shell hydrogel for MB adsorption. Overall, the SA/CRG/MMt@CMCNF hydrogel offers several advantages, including a simple production process, low cost, high adsorption capacity, and good recyclability. This research presents a design strategy for multifunctional hydrogel composites incorporating nanomaterials, providing novel insights into the development of dye treatment technologies. Graphical abstract
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INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2025
·
IF 8.5
Shaochen Sun,Tianyu Li,Yutong Zhou,Zhihui Wang,Farong Tao,Liping Wang,Guang Li
Ultralong colorful organic room temperature phosphorescence (RTP) materials combining heat-resistance, flexibility and large-area preparation are of great significance for their fabrication, processing and application. However, developing polymer-based RTP materials with above properties still faces daunting challenges. Herein, a sodium alginate (SA)-based binary doping system SA-H 2 NDC is developed by doping 2,6-naphthalic acid (H 2 NDC) into SA matrix, which demonstrates ultralong RTP with a lifetime of up to 877 ms and a bright green afterglow persisting for 8 s under ambient condition. A ternary doping system SA-H 2 NDC-R6G further achieves persistent delayed fluorescence with emission peak centered at a longer wavelength of 600 nm via triplet-to-singlet Förster resonance energy transfer (TS-FRET). Inspiritingly, SA-H 2 NDC-R6G shows time-dependent tunability of afterglow color. Significantly, the phosphorescence of SA-H 2 NDC and SA-H 2 NDC-R6G presents excellent heat-resistant properties in a temperature range from 298 to 353 K. Furthermore, large-area flexible SA-based RTP films are conveniently prepared by a simple doping-coating-drying process. The excellent optical and mechanical properties of SA-based RTP materials enable their successful applications in flexible display and advanced information encryption. This work expands the scope of ultralong polymer-based phosphorescence materials with heat-resistant luminescence, and provides a new avenue for developing large-area flexible colorful RTP materials.
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高影响因子
LWT-FOOD SCIENCE AND TECHNOLOGY
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2025
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IF 6.6
Xingxiang Yang,Yuqin Liu,Qian Yu,Ruoyao Zhang,Mengyao Wang,Jing Ding,Suisui Jiang,Feng Zhong,Aiguo Ma,Tianlin Gao
Aging leads to decline in chewing and digestive capabilities, increasing the risk of nutritional deficiencies. Elderly generally have insufficient intake of dietary fiber and protein. Soybean curd is an ideal protein source, while lack of dietary fiber might limit its nutritional effect. Therefore, this study aims to develop a sodium alginate (SA) soybean curd product with low (L-SA), medium (M-SA), and high (H-SA) viscosities which is easy to chew and digest. The impact of SA on soybean curd yield, water holding capacity (WHC), gel strength, texture, microstructure, bolus properties and simulated in vitro digestion were investigated. The results indicate the addition of SA shows more hydrogen bonds and enhance the WHC of protein-SA network structure, thereby improving the yield, hardness, chewiness, and gel strength. L-SA exhibited a more homogeneous and continuous microstructure. Sensory evaluation and bolus properties indicated the addition of SA influenced volunteers’ preference. L-SA was easier to chew and more acceptable. Furthermore, SA decreased the digestibility of soybean curd proteins, particularly at H-SA due to forming stronger gels in gastric conditions. These findings provide valuable insights into the development of novel high-fiber soybean curd and clarify the impact of different viscosities on physicochemical properties and protein digestibility.
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International Journal of Nanomedicine
·
2024
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IF 6.6
Chen Lin,Xinyi Bai,Linkun Zhang
Purpose MicroRNA-34c-5p (miR-34c-5p) plays a pivotal role in bone remodeling, yet its therapeutic potential is hindered by challenges such as instability, limited cellular internalization, and immune responses. This study was aimed at developing innovative scaffolds capable of efficiently delivering microRNAs (miRNAs), specifically miR-34c-5p.Methods Chitosan (CS)/sodium tripolyphosphate (STPP)/sodium alginate (SA) scaffolds, referred to as CTS scaffolds, were synthesized at a specific ratio and characterized using dynamic light scattering and scanning electron microscopy (SEM). Cytotoxicity assessments were conducted through cell activity staining. The loading capacity and releasing performance of miRNAs were quantified using spectrophotometry. Subsequently, the in vivo efficacy of miR-34c-5p Agomir/Antagomir in regulating bone repair was evaluated in the rabbit cranial bone defect model, with micro-CT scanning and histological analysis conducted at 4, 8, and 12 weeks.Results CTS scaffolds with a composition ratio of 1:0.2:0.1 were successfully synthesized, exhibiting a mean particle size of 360.1 nm. SEM revealed scaffolds had the porous spongy structure. Cell activity staining confirmed the excellent biocompatibility of the CTS scaffolds. Spectrophotometry demonstrated miR-34c-5p Antagomir were continually released, reaching 91.41% within 30 days. Differential new bone formation was observed between the miR-34c-5p Agomir and Antagomir groups. Micro-CT imaging and histological staining revealed varying degrees of bone regeneration, with notable improvements in the miR-34c-5p Antagomir group.Conclusion CTS scaffolds with a composition ratio of 1:0.2:0.1 demonstrate favorable biocompatibility and enable efficient loading and sustained release of miR-34c-5p Antagomir. The study suggests potential applications of miR-34c-5p Antagomir in promoting bone repair and highlights the promise of innovative scaffolds for therapeutic miRNAs administration in bone regeneration.
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高影响因子
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
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2025
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IF 8.5
Yao Liu,Dongshu Chen,Panpan Gu,Yue Liu,Bai Wang,Xiaoxu Xu,Jianshe Hu
With the rapid development of wearable electronic devices and smart sensors, flexible sensors have received much attention due to their excellent mechanical properties and good adaptability. However, developing a simple method to produce conductive hydrogels with excellent electrical conductivity , mechanical properties, environmental stability, and durability is still a major challenge. In this study, a novel dual-network composite flexible sensor was developed, which was mainly composed of xanthan gum (XG), sodium alginate (SA), polyacrylamide (PAAm), and gallium‑indium alloy (Ga-In). The sensor combined the good biocompatibility and thickening properties of natural polysaccharides , the flexibility of polymers, and the excellent electrical conductivity of conductive metal alloys. The sensors exhibited good mechanical properties (stress ≈ 400 KPa, strain ≈ 540 %), high fatigue resistance , recoverability and excellent environmental adaptability. In addition, the addition of liquid metal could increase the conductivity (1.83 S m −1 ) of the hydrogel while maintaining high transparency, and the flexible sensor device constructed from it had high sensitivity to strain (GF = 2.75). Therefore, the hydrogel as a flexible sensor showed promising applications in detecting human movement, which could monitor the movement of human joints, micro-expressions, and handwriting. This will provide new ideas for scientific management of sports and health monitoring.
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INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2025
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IF 8.5
Fengli Huang,Tong Zhang,Zhiheng Yu,Taiyao Pan,Tianyu Zhang,Hao Xue
Conductive hydrogel strain sensors with high stretchability, wide sensing range and high sensitivity have been extensively studied for their potential applications in wearable sensing devices. However, achieving high sensitivity in the low-strain range remains a challenge. In this study, the hydrogel was prepared by blending acrylamide, sodium alginate, and cellulose nanocrystals. The hydrogel substrate was fabricated using the electrohydrodynamic printing method, and hierarchical ultraviolet photopolymerization was employed to achieve effective bonding between the hydrogel substrate and MXene film. Further, the hydrogel composite substrate was pre-stretched to overcome the interfacial stress differences between the MXene film and hydrogel substrate, thereby completing the fabrication of a PAAM-SA 2% -CNCs 3% & MXene (PSC&M) sensor with the designed crack structure. The fabricated strain sensor significantly broadened the detection sensitivity of hydrogel sensors in the low-strain range (Strain: 0–5 %, GF = 23.4) and achieved fast response/recovery times (106 ms / 82 ms), obtaining excellent mechanical properties (0.33 MPa stress, 710 % elongation at break) and electrical conductivity (1.931 mS/cm). Application demonstrations based on the fabricated PSC&M sensors in various human motions, subtle vibration signal monitoring and hand-knuckle rehabilitation training, to show their potential applications in smart devices, e-skin and wearable medical rehabilitation devices.
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高影响因子
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2025
·
IF 8.5
Yun Feng,Jinrong He,Jinzhen Cao,Wei Qu,Limin Peng
Melamine formaldehyde (MF) resin is a widely used decorated material, but its inherent brittleness limits broader applications. In this study, a novel bio-based nanomaterial (AQ@HNTs) was fabricated via a layer-by-layer self-assembly of quaternized chitosan and sodium alginate onto halloysite nanotubes (HNTs), providing a green and efficient strategy for natural nanotube surface modification. The resulting AQ@HNTs were incorporated into MF resin to synergistically enhance its toughness and antibacterial properties without affecting its curing behavior at 120 °C. Comprehensive characterization of AQ@HNTs was performed using Fourier transform infrared spectroscopy (FTIR), Zeta potential analysis, thermogravimetric analysis (TGA), differential scanning calorimetry (DSC), and transmission electron microscopy (TEM). The mechanical and antibacterial performance of the resulting MF-AQH resin-impregnated paper was evaluated for mechanical properties, antibacterial performance, and crack resistance through dynamic mechanical analysis (DMA), mechanical testing, antibacterial assays, and crack resistance tests. The paper impregnated with 5 wt% AQ@HNTs exhibited significantly improved mechanical properties, with tensile strength, elongation at break, and elastic modulus increasing by 78.11 %, 39.66 %, and 27.61 %, respectively. Additionally, it demonstrated strong antibacterial activity against Escherichia coli and Staphylococcus aureus , with inhibition zones of 21.97 ± 0.57 mm and 32.19 ± 0.37 mm, and bacterial survival rates reduced to 17.99 % and 11.52 %, respectively. This work highlights a dual-functional approach combining structural reinforcement and antimicrobial activity through an innovative bio-based modification strategy, offering a promising solution for high-performance MF resin in interior decoration applications.
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高影响因子
Journal of Chemistry
·
2020
·Vol. 2020
·期 1
·8758432
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IF 1.79
Wu Yi-cheng,Yang Ai-li,Gao Wei,Fu Hai-yan,Wang Ze-jie
The roles of Al 2 O 3 nanoparticles on the removal of carbamazepine (CBZ) by Chlorella vulgaris immobilized in sodium alginate gel beads were for the first time investigated. The optimum conditions to prepare immobilized C. vulgaris beads with addition of Al 2 O 3 nanoparticles were determined as follows: C. vulgaris density was 3.0 × 10 6 cells for 1 mL sodium alginate solution, Al 2 O 3 nanoparticle concentration was 0.5 g/L, and concentrations of sodium alginate and CaCl 2 were 1.6% and 1%, respectively. The results showed that the proposed algae beads achieved the highest CBZ removal rate of 89.6% after 4 days of treatment, relative to 68.84%, 48.56%, and 17.76% in sodium alginate-immobilized C. vulgaris , free microalgae, and Al 2 O 3 nanoparticle alginate beads, respectively. The results also showed that the CBZ removal rate increased with more proposed algae beads, while decreased with increased bead diameter. The algae beads exhibited excellent CBZ removal ability even after three recycles. This work provided an economical and effective approach to remove CBZ from water.
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高影响因子
ULTRASONICS SONOCHEMISTRY
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2016
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IF 4.556
Liping Feng,Yanping Cao,Duoxia Xu,Sasa You,Fu Han
The aim of the study was to investigate the impact of sodium alginate (ALG) pretreated by ultrasound on the enzyme activity, structure, conformation and molecular weight and distribution of papain. ALG solutions were pretreated with ultrasound at varying power (0.05, 0.15, 0.25, 0.35, 0.45 W/cm 2 ), 135 kHz, 50 °C for 20 min. The maximum relative activity of papain increased by 10.53% when mixed with ALG pretreated by ultrasound at 0.25 W/cm 2 , compared with the untreated ALG. The influence of ultrasound pretreated ALG on the conformation and secondary structure of papain were assessed by fluorescence spectroscopy and circular dichroism spectroscopy. The fluorescence spectra revealed that ultrasound pretreated ALG increased the number of tryptophan on papain surface, especially at 0.25 W/cm 2 . It indicated that ultrasound pretreatment induced molecular unfolding, causing the exposure of more hydrophobic groups and regions from inside to the outside of the papain molecules. Furthermore, ultrasound pretreated ALG resulted in minor changes in the secondary structure of the papain. The content of α-helix was slightly increased after ultrasound pretreatment and no significant change was observed at different ultrasound powers. ALG pretreated by ultrasound enhanced the stability of the secondary structure of papain, especially at 0.25 W/cm 2 . The free sulfhydryl (SH) content of papain was slightly increased and then decreased with the increase of ultrasonic power. The maximum content of free SH was observed at 0.25 W/cm 2 , under which the content of the free SH increased by 6.36% compared with the untreated ALG. Dynamic light scattering showed that the effect of ultrasound treatment was mainly the homogenization of the ALG particles in the mixed dispersion. The gel permeation chromatography coupled with the multi-angle laser light scattering photometer analysis showed that the molecular weight ( M w ) of papain/ALG was decreased and then increased with the ultrasonic pretreatment. Results demonstrated that the activity of immobilized papain improved by ultrasonic pretreatment was mainly caused by the variation of the conformation of papain and the effect of interactions between papain and ALG. This study is important to explain the intermolecular interactions of biopolymers and the mechanism of enzyme immobilization treated by ultrasound in improving the enzymatic activity. As expected, ALG pretreated by appropriate ultrasound is promising as a bioactive compound carrier in the field of immobilized enzyme.
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