CONSTRUCTION AND BUILDING MATERIALS
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2023
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IF 7.4
Dongbin Liu,Bahityar Qasem,Junfeng Hou,Zhiming Wang,Junjie Cen,Shermamat Arkin,Xingying Zhang,Yuge Zhang,Youming Yu
Construction wastes (CWs) were utilized in this work as the feedstock for manufacturing wasted-based particle boards (WPBs). Results revealed that phytic acid (PA), as a natural and sustainable fire retardant, imparts the WPBs excellent flame retardancy and smoke suppression. The hydrogen bonds network formed among PA, waste particles, and adhesive improves the stress transferring of WPBs when subjected to load, thus elevating the modulus of elasticity and inner bonding strength of PA-treated WPBs. We believe that the as-proposed recycling methods promote the value-added utilization of CWs, and it is also beneficial for realizing the recycling of timber architectures.
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INDUSTRIAL CROPS AND PRODUCTS
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2023
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IF 5.9
Mohammad Ziaur Rahman,Xin Wang,Lei Song,Yuan Hu
The demand for "green" materials increases due to concerns about the effects of flame-retardant textiles. Using natural plant-base compounds such as phytic acid (PA) and the most abundant green amino polysaccharide chitosan (CS) as effective and durable flame retardants for textiles is essential for creating sustainable and ecological textile products . This study aims to develop a novel, eco-friendly, phosphorus- and nitrogen-containing flame retardant known as ammonium phytate (AP), intending to improve the flame retardant properties of polyamide 6.6 (PA6.6) textiles. UV-induced grafting with 2-acrylamide-2-methylpropane sulfonic acid (AMPS) increases the surface functional groups of PA6.6 fabrics. Later, the surface-modified fabrics were coated with phosphorus-containing heteroatom-based components, namely, sulfur, nitrogen, silicon, and boron, onto a single flame retardant system via layer-by-layer (LBL) deposition of positively charged chitosan/boron drop (3-aminopropyl) triethoxysilane/silicon dioxide (CS/BAPTES/SiO 2 ) sole solution and negatively charged AP solution to enhance superior hydrophilic and durable flame retardant performance. According to the data, a weight pick-up of 56.5% is attributable to only 4 BLs. However, all the flame-retardant-coated fabrics can completely stop the melting-dripping tendency and achieve B-3 to B-2 ratings after the UL-94 vertical burning test. In addition, the LOI values of treated fabrics increase from 18.5% to 23.5% compared to a pure sample. The AMPS grafted with a 4BL-deposited fabric sample exhibits a maximum decrease in peak heat release rate (PHRR) of more than 54%. Moreover, the thermogravimetric analysis (TGA) test reveals a significant increase in thermal stability and char yield. Additionally, the as-prepared phosphorus-containing heteroatom-based coatings impart a water contact angle value of approximately 0⁰ within 2 s, demonstrating that the treated fabrics exhibit superior hydrophilic performance. Moreover, using AMPS-grafted and only 2-BL-deposited treatments improves coating stability in washing and imparts durable flame retardancy that can resist up to 20 washing cycles. It is proposed that the sustainable phosphorus-containing heteroatom-based coating may be a potentially effective replacement for existing durable flame retardants routinely used in textile finishing operations.
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JOURNAL OF POLYMER SCIENCE
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2023
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IF 3.4
Jun He,Nan Lan,Huaibo Yu,Dayue Du,Hanna He,Chuhong Zhang
Lignin, a biomass derived polymer, has gained considerable recognition as a highly promising precursor of hard carbon primarily due to its ample reserve, eco-friendliness, and cost-effectiveness. However, lignin-derived hard carbon via direct carbonization generally yields suboptimal performance for sodium storage due to the unsuitable microstructure. Herein, a simple phytic acid activation combined high-temperature annealing strategy is proposed to regulate the microstructure of lignin-derived hard carbon for high-performance sodium-ion batteries (SIBs) anode. Phytic acid activation not only reduces the ordering and creates abundant closed pores through improving the crosslinking degree and thermal stability of lignin but also introduces P heteroatoms to effectively expand the interlayer spacing of the derived hard carbon. High-temperature carbonization further increases the size of closed pores, leading to a more favorable sodium storage in the plateau region. Consequently, the optimal phytic acid activating lignin derived hard carbon (PLHC 1300) delivers a high capacity of 380.3 mAh g −1 with an enhanced plateau capacity ratio of near 68.1% at 30 mA g −1 , and achieves a capacity retention of near 100% after 150 cycles at 1 A g −1 . This work significant advances the application of lignin in energy storage and contributes to the progression of commercial SIBs. Graphical
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JOURNAL OF COLLOID AND INTERFACE SCIENCE
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2023
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IF 9.9
Qian Ren,Xiaojing Zhang,Yangyi Sheng,Nuo Yu,Maoquan Li,Zhigang Chen
Mild-temperature photothermal therapy (mPTT) has shown some advantages over traditional photothermal therapy, such as reducing the damage to surrounding healthy tissues and minimizing side effects. Nevertheless, cancer cells can easily repair damage caused by mild hyperthermia due to heat shock proteins (HSPs). Thus, it is imperative to maximize the mPTT efficiency by down-regulating HSPs overexpression and combining other cancer treatments. Herein, we report the synthesis of phytic acid (PA)-Cu 2+ framework/copper sulfide (Cu 2-x S) nanocomposites (abbreviated as PA-Cu/Cu 2-x S NPs) as the novel therapeutic platform that can down-regulate HSPs overexpression for enhanced multimodal mPTT/chemodynamic therapy (CDT)/chemotherapy. PA-Cu/Cu 2-x S NPs were prepared through self-assembly and in-situ vulcanization strategy, resulting in irregular-shaped particles with an approximate size of 100 nm. PA-Cu/Cu 2-x S NPs display a plasmon effect from Cu 2-x S, which enhances near-infrared (NIR) absorption and possesses excellent photothermal conversion efficiency (41.7%). Moreover, PA-Cu/Cu 2-x S NPs exhibit Fenton-like reaction activity resulting from the Cu ions for CDT, and the reaction activity can be further improved 1.3 times due to mild hyperthermia during mPTT. Furthermore, the generated hydroxyl radical (•OH) can effectively decrease HSPs level to enhance mPTT. PA-Cu/Cu 2-x S NPs can also serve as a drug delivery system, and they are capable of loading doxorubicin (DOX) with a loading ability (20.7%). Combining mPTT/CDT/chemotherapy exhibits significant inhibition of tumor growth. This approach can serve as a basis for designing more exquisite platforms that combine mPTT with other therapies to achieve more effective cancer treatment.
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高影响因子
Journal of Materials Chemistry C
·
2023
·Vol. 11
·期 40
·13752-13762
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IF 6.4
Yuanze Meng,Jialun Li,Xijia Yang,Yang Gao,Xuesong Li,Liying Wang,Wei Lü
Poly (3,4-ethylenedioxythiophene): poly (4-styrenesulfonic acid) (PEDOT:PSS) is a kind of widely used polymer with excellent electrical conductivity. In this study, PEDOT:PSS was modified to achieve self-healing ability while maintaining excellent energy storage properties. The modified PEDOT:PSS hybrid film demonstrated instantaneous self-healing ability due to physical cross-linking after being subjected to different external cuts (the average self-healing time was 1.44 s). When pressed at different rates, the film had a self-healing time of less than 0.12 s, and a retention rate of 74% after pressing 1750 times consecutively at a rate of 8.6 cm s−1. The mechanism of self-healing was investigated using theoretical calculations. Tungsten trioxide (WO3) was further introduced into the PEDOT:PSS hybrid film to fabricate electrochromic energy storage devices (EESDs), achieving a specific capacitance of 105.35 mF cm−2 and a capacitance retention of 98.2% after 1000 cycles. In the organic/inorganic hybrid system, the modified PEDOT:PSS film acted as both a protective coating for WO3 and exhibited a synergistic color change with WO3, ultimately improving the overall performance of the device. The present self-healing strategy can help design restorers for EESDs and can be extended to other new rechargeable electrochromic battery systems with good application prospects.
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JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
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2023
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IF 10.9
Xiang Zhang,Kai Yao,Xiao Wang,Jinli Wang,Hongtao Guo,Xiaona Ma,Yang Yang,Hongjing Wu,Wei Lu
Hybrid engineering is gradually deemed as a powerful approach to solving the bottleneck problem of metal-organic framework (MOF) derived absorbers for practical application. Herein, a new type of semiconductor/carbon-based hybrid material was successfully prepared by phytic acid (PA) modification and carbonization of MOF/bacterial cellulose (BC) precursors, which remedied the drawbacks of structural instability, lethal byproducts and complicated steps reported previously. Specifically, the obtained Fe(PO 3 ) 2 @C/phosphorus-doped carbon foam (Fe(PO 3 ) 2 @C/PCF) had a 3D hybrid micro-nanostructure that integrated spatial microcurrent network, multi-level pores, heterogeneous interfaces and lattice defects, showing its unique advantages of low filler content (15 wt.%), moderate surface reflectivity, multi-band microwave absorption and radar stealth. The experimental analysis and CST simulation further revealed that PA dosage can precisely adjust the hybrid phase content, pore texture and electromagnetic parameters of the final product to achieve synergistic enhancement of multiple dielectric response, impedance matching and attenuation capacity. As a result, an effective bandwidth (EAB) of 6 GHz and a minimum reflection loss (RL min ) of −57.0 dB were obtained in the Ku- and C-bands, respectively. These encouraging results may advance the development of novel MOF-derived absorbents based on the hybridization principle.
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ACS Applied Nano Materials
·
2021
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IF 5.097
Xiuju Wu,Rongfei Wang,Wei Li,Bomin Feng,Weihua Hu
Precious metal phosphides have attracted considerable research interest for electrocatalysis in recent years, but it remains an open question how to design such electrocatalysts to facilitate the gas-evolving water electrolysis with high activity and durability at low metal loading. In this work, rhodium phosphide nanoparticles are attached on a nitrogen/phosphorus-doped carbon cloth matrix (Rh2P-N/P-CC) with an ultralow Rh loading of 39.2 μg cm–2 to be used as an excellent bifunctional electrocatalyst for the hydrogen evolution reaction (HER) and the oxygen evolution reaction (OER). By rationally integrating the merits of its two components, as-reported Rh2P-N/P-CC exhibits impressive HER catalytic performance, outperforming benchmark Pt/C catalysts at only 7.85% equivalent of Pt; meanwhile, Rh2P-N/P-CC largely surpasses the RuO2 catalyst during OER catalysis in alkaline media. As a bifunctional electrocatalyst, Rh2P-N/P-CC catalyzes stable electrochemical water splitting of 200 mA cm–1 under 1.7 V. This work reports a feasible strategy to integrate three-dimensional electrodes for high performance water electrolysis.
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INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
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2021
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IF 6.953
Yinchun Fang,Weihao Sun,Junwei Li,Hailong Liu,Xinhua Liu
Polyester/cotton blend fabrics are widely used in clothing and household textiles which combine the comfort of cotton and excellent mechanical strength of polyester. However, their high flammability due to the special “wick effect” resulting from the different thermal decomposition process of cotton and polyester causes greatly potential fire hazards. In this study, fully bio-based intumescent flame retardant (IFR) coating of chitosan/phytic acid (CS/PA) was layer-by-layer (LBL) assembly constructed on polyester/cotton blend fabrics. The LOI value of polyester/cotton blend fabric which was LBL assembly coated by 20 bilayers CS/PA reached 29.2%. And the dripping of coated fabric was eliminated. The results of cone calorimetry test confirmed CS/PA coating greatly improved the flame retardancy of polyester/cotton blend fabrics. Thermogravimetric analysis (TGA) results showed CS/PA coating changed the thermal decomposition process to promote the char formation of polyester/cotton blend fabrics. CS/PA coating on fabric could form the IFR system which acts through both condensed phase action by the catalysis dehydration reaction to forming stable char and gas phase action by the blowing effect. This research provides a new strategy to eco-friendly flame retardant and dripping-resistant for polyester/cotton blend fabrics by bio-based IFR system through facile LBL assembly method.
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COMPOSITES PART B-ENGINEERING
·
2021
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IF 9.078
Chengwei Liu,Tao Zhang,Yuxin Luo,Yixuan Wang,Jiacheng Li,Ting Ye,Ruifeng Guo,Pingan Song,Jiu Zhou,Hao Wang
Polyurethane (PU) sponge has a wide range of applications in our daily life. Unfortunately, the PU sponge is highly flammable and becomes a breeding ground for bacteria, thereby threatening human health and life. To date, it remains a challenge to improve the flame retardant and antibacterial properties of PU sponge simultaneously without destroying its inherent elasticity and flexibility. Here we report a novel composite coating on the PU sponge using bioderived phytic acid and sodium lignosulfonate via a facile soaking method. Compared to the pristine sponge, the coated PU sponge can reach a 32% reduction in peak heat release rate during cone calorimeter test, and prevent melt dripping after being ignited by a butane torch and the flame can be self-extinguished after the torch is removed. The resultant composite coating also demonstrates a killing rate of 99% against Staphylococcus aureus . Meanwhile, the coated PU sponge can retain the inherent elasticity and flexibility even after 500 cycles of compression. Furthermore, the coating materials are easily recyclable, which provide a useful reference for multifunctional treatment of sponge and cyclic utilization of resources.
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EUROPEAN POLYMER JOURNAL
·
2021
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IF 4.598
Mohammad Ziaur Rahman,Chanchal Kumar Kundu,Xin Wang,Lei Song,Yuan Hu
A dual interaction-based (i.e., ionic/covalent) deposition of carbohydrate polymers, namely chitosan (CS) and oxidized sodium alginate (OSA) along with a plant-derived phosphorus-rich compound like phytic acid (PA) and a nitrogen rich compound like melamine (ME) was considered onto the phosphorylated chitosan (PCS) modified polyamide 6.6 (PA6.6) fabric surfaces in order to impart durable flame retardancy along with super-hydrophilicity of the same. Firstly, the pure PA6.6 textile surfaces were modified by PCS via UV-induced grafting and subsequently, the above-mentioned polyelectrolytes were assembled onto the fabric surfaces in a quadralayer fashion [i.e., (CS/ME-OSA-CS/ME-PA) n ; “n” represents the number of quadralayers (QLs)]. Here, the amino groups of CS/ME and the aldehyde groups of the OSA were stabilized via covalent interaction and the deposition of positively charged CS/ME and negatively charged phytic acid (PA) formed ionic interaction. In the vertical burning (UL-94) test, both the only PCS grafted and the simultaneously PCS-grafted along with LbL assembled fabrics could completely stop the melt dripping tendency and attained a V-1 rating. In the meantime, the limiting oxygen index (LOI) value received a moderate increase from 18.5 % of pure PA6.6 to 23.5 % for the PCS grafted and 8-QLs deposited fabric sample (i.e., PA6.6-g-PCS-8QL). Moreover, the PA6.6-g-PCS-8QL fabric sample exhibited a dramatic decrease in the peak heat release rate (pHRR) and total heat release (THR) by about 45 % and 24.7 % respectively alongside enhanced thermal stability. Apart from the appreciable flame retardancy, this fabric sample (i.e., PA6.6-g-PCS-8QL) could boost up the hydrophilicity to attain a water contact angle of 0°. Finally, this dual interaction-based deposition of bio-inspired polyelectrolytes posed a positive impact in enhancing the coating stability in laundering and imparting durable flame retardancy to sustain even up to 20 laundering cycles.
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PROGRESS IN ORGANIC COATINGS
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2021
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IF 5.161
Wei Liu,Rui Shi,Xinguo Ge,Hao Huang,Xiaosui Chen,Meng Mu
Phytic acid (IP 6 ) is the principal storage form of phosphorus in many plant tissues, especially the bran portion of grains and other seeds. This paper describes an attempt to develop a bio-based finishing using IP 6 biomolecules in order to reduce the flammability of polyamide 66 (PA 66) fabric and solve its melt dripping problem. ATIR-FTIR and SEM characterizations indicate the formation of a bio-based coating containing P O P groups (O-IP 6 bio-oligomer) by hydration reaction between IP 6 biomolecules during finishing. The limiting oxygen index test and the vertical burning test show that the treated PA fabric has the highest LOI value of 32.3 and self-extinguishing behavior without melt dripping, confirming the ability of O-IP 6 coating to improve the fire performance of thermoplastic polyamide fabric. And enhancement in char formation of the treated fabric and reduction in its total heat release have also been verified by thermogravimetry analysis and microcalorimetry. Durability test reveals O-IP 6 oligomeric structure could promote the water resistance of the treated sample, which could keep 82.7 % of the original LOI for 25IP 6 -PA fabric after 20 times washing with water alone. Moreover, the interesting intumescent-like flame retardant mechanism of IP 6 -PA fabric has also been proposed here.
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JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2021
·
IF 8.128
Yue Jiao,Ya Lu,Kaiyue Lu,Yiying Yue,Xinwu Xu,Huining Xiao,Jian Li,Jingquan Han
Hypothesis Hydrogel-based sensors have attracted considerable attention due to potential opportunities in human health monitoring when both mechanical flexibility and sensing ability are required. Therefore, the integration of excellent mechanical properties , electrical conductivity and self-healing properties into hydrogels may improve the application range and durability of hydrogel-based sensors. Experiments A novel composite hydrogel composed of polyaniline (PANI), polyacrylic acid (PAA) and 2,2,6,6-tetramethylpiperidin-1-yl)oxyl (TEMPO)-oxidized cellulose nanofibrils (TOCNFs) was designed. The viscoelastic, mechanical, conductive, self-healing and sensing properties of hydrogels were studied. Findings The TOCNF/PANI/PAA hydrogel exhibits a fracture strain of 982%, tensile strength of 74.98 kPa and electrical conductivity of 3.95 S m −1 , as well as good mechanical and electrical self-healing properties within 6 h at ambient temperature without applying any stimuli. Furthermore, owing to the high sensitivity of the TOCNF/PANI/PAA-0.6 hydrogel-based strain sensor (gauge factor, GF = 8.0), the sensor can accurately and rapidly detect large-scale motion and subtle localized activity. The proposed composite hydrogel is as a promising material for use as soft wearable sensors for health monitoring and smart robotics applications.
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