JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2023
·
IF 9.9
Kunling Liu,Yao Cheng,Jinhao Li,Dan Ding,Yunlan Liu,Guangxian Zhang,Fengxiu Zhang
Cotton fabrics are extremely flammable. Therefore, ammonium salt of dipentaerythritol hexaphosphoric acid (ADPHPA), a novel reactive phosphorus flame retardant without halogen and formaldehyde, was synthesized by solvent-free synthesis method. Surface chemical graft modification was chosen to introduce flame retardant, imparting its flame retardancy and washability. SEM indicated that ADPHPA entered the interior of cotton fiber, which was grafted with OH of control cotton fabrics (CCF) by forming P O C covalent bonds to obtain treated cotton fabrics (TCF). There were no apparent differences in the fiber morphology and crystal structure after treatment according to SEM and XRD analysis. TG analysis demonstrated that the decomposition process of TCF was changed compared with CCF, while lower heat release rate and total heat release of TCF indicated its combustion efficiency was also reduced based on cone calorimetry test. Meanwhile, in the durability test, TCF had undergone 50 laundering cycles (LCs) in accordance with AATCC-61-2013 3A standard and had a short vertical combustion charcoal length, which were able to be regard as durable flame-retardant fabrics. The mechanical properties of TCF decreased to a degree, but did not affect the actual use of cotton fabrics. Taken as a whole, ADPHPA has research significance and development potential as a durable phosphorus-based flame retardant.
研究领域:
材料科学
·
纺织工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
FLUID PHASE EQUILIBRIA
·
2014
·
IF 2.241
Fufeng Cai,Guomin Xiao
This work demonstrates the capabilities of three phosphoric-based ionic liquids (ILs) as solvents for the extraction of ethanol from its mixture with heptane. The knowledge of liquid–liquid equilibria (LLE) of this mixture is essential for the design of the extraction separation process. For this reason, the experimental LLE data were measured for the ternary systems, {ethanol + heptane + 1,3-dimethylimidazolium dimethylphosphate ([MMIM][DMP]), or 1-ethyl-3-methylimidazolium diethylphosphate ([EMIM][DEP]), or 1-butyl-3-methylimidazolium dibutylphosphate ([BMIM][DBP])}, at T = 298.2 K and atmospheric pressure. The thermodynamic nonrandom two-liquid (NRTL) model was used to correlate the experimental results for the studied ternary systems. The extraction capabilities for the studied ILs were evaluated by solute distribution ratios of ethanol and ethanol/heptane selectivities. Moreover, this extraction capability was also compared with other ILs obtained from the literature. The experimental results show that the studied ILs can be suitable to act as solvents for the separation of the ethanol and heptane in the extraction process. The extraction capabilities for the studied ILs decrease in the following order [MMIM][DMP] > [EMIM][DEP] > [BMIM][DBP].
研究领域:
化学工程
·
物理化学
✓ 已验证
产品关联
DOI
高影响因子
SOFT MATERIALS
·
2017
·
IF 1.101
Kaiqi Fan,Xiaobo Wang,Guanglu Han,Libo Niu,Xuzhao Yang,Zhigang Yin,Jian Song
Phosphorous-based organic acids (P) and diamine (M) were used to produce a supramolecular PM complex at a 2:1 molar ratio, which then formed a stable gel in dimethyl sulfoxide (DMSO) and N, N-dimethylformamide (DMF). According to SEM, the morphologies of the aggregates depended on the steric substitute of phosphorous-based organic acids and the structure of the complementary diamine. 31P NMR and FTIR spectroscopies revealed that hydrogen bonding within the PM complex was the main driving force for the self-aggregation. XRD studies revealed that the two-component gelators mainly assemble into a stricter lamellar structure when increasing the rigidity of the complementary component. In contrast, the gelators with the aliphatic unit mainly assembled into a random lamellar structure and showed more possibility of deforming. As such, the results in this paper demonstrate how structure effects in two-component gel system of phosphorous-based organic acids and diamine can control self-assembly process.
研究领域:
材料科学
·
化学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF THE ENERGY INSTITUTE
·
2021
·
IF 6.186
Youjian Zhu,Yun Liu,Liang Wang,Wei Yang,Haiping Yang,Long Jiang,Zhenyi Du,Jingai Shao,Hanping Chen
Combustion of agricultural residues for heat and electricity production is an efficient way to reduce amount of such waste source and emissions due to inappropriate treatment of them. However, unlike other biomass materials, agricultural residues often have high content of ash and certain ash forming elements with low meting temperatures, resulting in sintering and slagging during combustion processes . It complicates combustion of agricultural residues and restricts further utilization of this renewable energy source . In this work, sintering of a typical agricultural biomass cornstalk and effect of two phosphate additives, Ca(H 2 PO 4 ) 2 ·H 2 O and NH 4 H 2 PO 4 , were investigated by a combination of various techniques. Results indicated that the addition of Ca(H 2 PO 4 ) 2 ·H 2 O increased the initial melting temperature of cornstalk ash by 64–209 °C. The ash sintering behavior was greatly improved as a result of formation of high melting temperature K–Ca phosphates, Ca 9 MgK(PO 4 ) 7 and Ca 2 KP 3 O 10 upon addition of the Ca(H 2 PO 4 ) 2 ·H 2 O. It is accompanied with reduced generation of low melting temperature K-rich silicates and the formation of large ash aggregates. Addition of NH 4 H 2 PO 4 increased the initial ash melting temperature by 28–116 °C, but it had slight influence on the cornstalk ash sintering characteristics. The analysis revealed that, although the addition of NH 4 H 2 PO 4 resulted in the formation of high melting temperature K 2 CaP 2 O 7 , certain amount of K phosphates and silicates eutectics were still formed, initiating and promoting sintering of ash from mixture of cornstalk and NH 4 H 2 PO 4 . Reactions between Ca(H 2 PO 4 ) 2 ·H 2 O and potassium salts under different conditions were also studied. It was found that reactions between Ca(H 2 PO 4 ) 2 ·H 2 O and potassium salts might already start as the temperature higher than 300 °C. K 2 CaP 2 O 7 , Ca 2 P 2 O 7 , Ca(PO 3 ) 2 and KCa(PO 3 ) 3 were identified as main products from these reactions and amounts of them considerably depends on the heat treatment temperatures and mixing ratios between Ca(H 2 PO 4 ) 2 ·H 2 O and potassium salts. Compared to KCl, K 2 CO 3 had a higher reactivity toward the Ca(H 2 PO 4 ) 2 ·H 2 O under same study conditions. The current work shows the addition of Ca(H 2 PO 4 ) 2 ·H 2 O is a promising approach to alleviate the ash sintering issues and assure efficient and smooth combustion of cornstalk.
研究领域:
能源与环境科学
·
生物质能研究
✓ 已验证
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2024
·
IF 13.3
Yabin Zhang,Wenguang Zhang,Houxiang Yin,Yanlin Wang,Bingbing Wang,Lishuai Zong,Jinyan Wang,Xigao Jian
The robust human–machine interaction systems of the aerospace industry necessitate the development of thermal resistant wave-transparent composites, with a pivotal focus on organic resin matrix. However, enhancing the heat resistance of such materials while preserving other critical attributes has been a formidable challenge. In this study, a novel designed strategy of a dual-curing functional phosphorus-based phthalonitrile monomer (P-ALK-PN) has been proposed. The optimized curing temperatures for intra- or intermolecular Diels-Alder reactions of alkynyl groups and polyaddition reaction of cyano groups resulted in a homogeneous and highly crosslinked N-enriched phthalonitrile system. After curing at 450 °C, the resin, namely P-ALK-PN-450 °C, demonstrated exceptional thermal stability ( T 5% = 644 °C), thermo-oxidative stability ( T 5% = 554 °C), and char yield at 800 °C (90.7 % in N 2 and 67.5 % in air). Their quartz fiber reinforced composites (P-ALK-PN/QFs) were subsequently fabricated by the hot-pressing process. Upon post-curing at 420 °C, P-ALK-PN-420 °C/QF displayed elevated glass transition temperature (550 °C), flexural strength (319 MPa), and relatively low dielectric properties with a dielectric constant (D k ) of approximately 4.2 and a dissipation factor (D f ) less than 0.02 across a wide temperature ranging from 25 °C to 600 °C. Especially, it exhibited excellent flame retardancy (only a 6.7 % weight loss at ambient temperatures exceeding 1300 °C for 200 s) as well, stemming from release of eco-friendly inert gases (NH 3 ) and formation of a graphitized protective layer during pyrolysis. These promising results highlight the potential applications of P-ALK-PN resins in aerospace and high-performance engineering fields.
研究领域:
材料科学
·
航空航天工程
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2022
·
IF 16.744
Min Jiang,Bo-Wen Liu,Feng-Ming He,Qin Zhang,Ao Wang,De-Ming Guo,Hai-Bo Zhao,Li Chen,Yu-Zhong Wang
Although conventional chemical copolymerization method has shown favorable results in improving certain performance of polymers, simultaneous improvement of overall properties is hardly achieved. Here, we reported a feasible method to fabricate high-performance polymers with great overall properties by simultaneously tailoring their chemical constitution and topological conformation. We designed and synthesized a novel functional monomer with a sidechain caged structure based on phosphorus chemistry, and prepared the corresponding aliphatic polyamide as a typical representative of thermoplastic synthetic polymers. The incorporation of a sidechain caged structure enhanced the chain entanglement of the resultant polyamide, thus improved the mechanical strength by 39% and largely enhanced the heat resistance. The great processability was basically uninfluenced due to the easy dissociation of the entanglement during processing, enabling the potentially wide application fields as both fibers and engineering plastics. Furthermore, based on the free radical scavenging effect of the phosphorus-based monomer, the flame retardancy of the resultant polyamide was significantly improved. In sight of these findings, this work provides a novel method for fabricating high-performance polymers for various applications.
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
Inorganic Chemistry Frontiers
·
2023
·Vol. 11
·期 4
·1153-1166
·
IF 7
Jiajing Xia,Lujia Zhang,Yizhou Wang,Weiju Hao
Constructing economical and corrosion-resistant catalytic electrodes for efficient and high-current seawater splitting is a significant challenge. Herein, we employed a gentle, one-step immersion method to obtain an efficient and stable self-supporting integrated catalytic electrode via nickel foam (NF) etched in situ by sodium hypophosphite and trace ruthenium (Ru@P–NF). The successful growth of spherical Ru on the P–NF resulted in high intrinsic activity and rapid electron transfer capabilities. The Ru@P–NF electrode achieved a current density of 100 mA cm−2 in the hydrogen evolution reaction (HER) with an overpotential of only 32 mV in an alkaline simulated seawater system (1 M KOH + 0.5 M NaCl). An overpotential of only 153 mV resulted in a current density of 10 mA cm−2 in the oxygen evolution reaction (OER). Moreover, this electrode necessitated a mere 1.42 V at 20 mA cm−2 to facilitate overall water splitting. Impressively, the operation of Ru@P–NF was stable at 100 mA cm−2 for over 1500 hours without significant degradation, and thus demonstrated stable catalysis for an impressive 300 h at an industrial-level high current density in a weakly alkaline seawater and urine system. This work provides robust theoretical support for the construction of efficient industrial-scale catalytic electrodes for water electrolysis.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
Metals
·
2023
·Vol. 13
·期 4
·658
·
IF 2.9
Zhen Feng,Ruoxuan Chen,Rui Huang,Fangli Zhang,Weizhen Liu,Sailin Liu
Phosphorus-based materials are considered to be reliable anode materials for potassium ion batteries (PIBs) due to their high theoretical capacity but suffer from inferior cycling stability and an unstable Solid Electrolyte Interface (SEI) layer. Herein, optimized ball-milled parameters and concentrated electrolytes are introduced to enhance the electrochemical performance of Sn4P3/C anodes. Consequently, the electrodes synthesized under optimized ball milling parameters could deliver a reversible capacity of 307.8 mA h g−1in diluted Potassium hexafluorophosphate (KPF6) electrolyte. Moreover, compared with diluted bis(fluorosulfonyl)imide (KFSI) electrolyte, a robust inorganic KF-rich SEI layer can be formed on the electrode’s surface by employing concentrated KFSI electrolyte and provides more rapid K ion conduction rates. Meanwhile, a large proportion of the FSI−anions participated in the K+solvation shell when the KFSI concentration increased. As a result, high specific capacities (225.1 mA h g−1at 50 mA g−1after 200 cycles) and excellent Coulombic efficiency (97.24% at 500 mA g−1after 200 cycles) can be achieved. This work may deepen our understanding of synthetic optimization in electrode material design and the role of concentrated electrolyte in tunning the solvation structure, and also offer an insightful clue to the design of high-capacity phosphorus-based anodes.Keywords:phosphorus-based anode;ball-milling;concentrated electrolyte;solvation structure;SEI layer
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
POLYMER DEGRADATION AND STABILITY
·
2024
·
IF 6.3
Jingsheng Wang,Jun Wang,Fengyi Wang,Shuang Yang,Chaoqun Wu,Xi Chen,Kaiwen Chen,Pingan Song,Hao Wang,Siqi Huo
The escalating need for advanced, fire-resistant, single-component epoxy resin (EP) is fueled by its practicality and economic benefits, highlighting the necessity for the development of multifunctional flame-retardant latent curing agents. Herein, two liquid phosphorus-containing bis-imidazole compounds, PPDM and DPCMI, were synthesized as latent curing agents for EP, demonstrating multiple effects in improving latency, thermal stability, mechanical properties, and fire safety. EP/PPDM and EP/DPCMI showcased superior storage stability and rapid curing at moderate temperatures, with EP/PPDM standing out for its long shelf life of 7 d and being gelled within 18 min at 100 °C. The resulting thermosets presented increased glass transition temperatures (189.5 and 178.9 °C), due to the enhanced crosslinking densities. The presence of bis-imidazole groups in PPDM and DPCMI enabled EPs to form denser crosslinked networks, leading to improved mechanical strength and toughness. The limiting oxygen index (LOI) values of EP/PPDM and EP/DPCMI reached 29.5% and 29.0%, respectively. Compared to the control EP, EP/PPDM and EP/DPCMI showed 23.1% and 18.8% reductions in total heat release and 22.0% and 23.11% decreases in total smoke production. These results confirm the enhanced flame retardancy and smoke suppression of EP/PPDM and EP/DPCMI because of introducing phosphorus-containing groups. Even though the curing time was halved to 2.5 hours, EP/PPDM systems maintained satisfactory overall performances. Therefore, this work offers a scalable strategy for the fabrication of single-component EP systems combining rapid curing, satisfactory flame retardancy, and enhanced thermal stability and mechanical properties, aligning with the needs of industrial applications.
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
Nano Energy
·
2023
·
IF 17.6
Yinan Zhao,Qingtao Zeng,Changcheng Jiang,Xuejun Lai,Hongqiang Li,Zhengzhong Wu,Xingrong Zeng
It is of great importance but full of challenge to construct intelligent materials with self-powered, durable and high fire-safety to meet the requirements of the intelligent fire protection towards Internet of Things (IoT). In this work, phosphorous-containing ionic liquid (PIL)-based ionogels (PILGs) were fabricated with acrylamide, low melting point polyanionic polystyrene sulfonate sodium and polycationic polydiallyl dimethyl ammonium chloride via ultraviolet initiated polymerization. PILGs showed good ionic conductivity (1.33 S·m −1 ) and high ionic thermoelectric effect (1.31 mV·K −1 ), which endowed flammable materials with accurate temperature-sensing, sensitive fire-warning performance and outstanding flame retardancy . When being burned, PILGs triggered the fire-warning system at about 1 s and rapidly self-extinguished. Besides, due to the good thermostability and low volatility of PIL, PILGs displayed high durability in extreme environments. More importantly, PILGs were designed as thermoelectric capacitors and high output power galvanic cells , which could power fire-warning circuits and electronics. Our work provides new insights for the development and application of self-powered intelligent fire protection materials.
研究领域:
材料科学
·
物联网技术
·
能源材料
✓ 已验证
产品关联
DOI
高影响因子
Energy Storage Materials
·
2022
·
IF 20.831
Tonghui Cai,Tongge Li,Bingyu Li,Yuxiang Hu,Xuejin Li,Tongen Lin,Haoyu Hu,Bin Luo,Yu Zhang,Xiaobo Zhu,Yongpeng Cui,Lianming Zhao,Wei Xing,Zifeng Yan,Lianzhou Wang
The use of multi-electron redox materials has been proved as an effective strategy to increase the energy density of batteries . Herein, we report a new reversible phosphorus-based five-electron transfer reaction (P(0) ⇆ P(+5)) in chloroaluminate ionic liquids (CAM-ILs), which represents a new reaction mechanism offering one of the theoretically highest specific capacities of 4325 mAh g −1 among all secondary batteries. Theoretical calculations further confirm the phosphorus electrochemical oxidation pathway with a potential oxidation voltage of ∼2.0 V. Detailed characterisation reveals fresh insight of the role of CAM-ILs, which can catalyze the electrochemical oxidation process of phosphorus by forming electron-enriched state of phosphorus. As a result, a conceptual aluminium-phosphorus battery was assembled, which deliver a high performance of 1512 mAh g −1 and 1176 Wh kg −1 , outperforming many similar metal ion battery chemistry. This study sheds light on phosphorus oxidation process in CAM-ILs and presents a new pathway using non-metallic element based multi-electron oxidation to achieve high performance batteries.
研究领域:
材料科学
·
电化学
✓ 已验证
DOI
高影响因子
COMPOSITES PART B-ENGINEERING
·
2024
·
IF 12.7
Jiahui Li,Qi Cao,Yi Zhao,Chengwen Gu,Beitao Liu,Qianqian Fan,Cijian Zhang,Yu Huang,Shuzi Jiang,Xigao Jian,Zhihuan Weng
Bio-based flame retardants have attracted growing attention for sustainability and comparable efficiency to petroleum-based counterparts but suffer from compatibility issues with epoxy resins and the trade-off between strength and toughness. Here, a Schiff base-derived phosphorus-based flame retardant (TV-DOPO) was developed from biobased vanillin and tyramine. In the presence of the binary curing agents, nanoscale in-situ constructive phase separation induced by hierarchical thermal curing process and strong hydrogen bonding provide the composite resin with enhanced both stiffness and toughness. The flexural and impact strengths reached 159 MPa and 55.4 kJ m −2 , which were increased by 36.5% and 129.6%, respectively, compared with the pristine epoxy, meanwhile excellent flame retardance was well maintained (UL-94 V-0 rating). Remarkably, these conjugated phosphaphenanthrene-containing composite resins demonstrate excellent UV-shielding capacity and optical transmittance. In this work, in-situ construction of a crosslinked network with tunable size of phase separation domains can be simply achieved by modulating the ratio of binary curing agents, to fabricate epoxy resins with all-around enhanced performance.
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
危险品化学品经营许可证（带存储）