ACS Sustainable Chemistry & Engineering
·
2021
·
IF 8.198
Shibo Wang,Siheng Wang,Minggui Shen,Xu Xu,He Liu,Dan Wang,Hongxiao Wang,Shibin Shang
Rigid polyurethane foam (RPUF) is one of the most widely used construction materials, but it is flammable and releases toxic smoke during combustion. In this study, a novel, synergistic-effect flame retardant (FPASO-DOPO) was synthesized by the Atherton–Todd reaction of 9,10-dihydro-9-oxa-10-phosphaphenanthrene-10-oxide (DOPO) with fumaropimaric acid-based siloxane (FPASO). The obtained FPASO-DOPO was then introduced into the cross-linking network of an RPUF by chemical bonding. The flame retardancy was enhanced by the synergistic effect of phosphorus and silicon in the FPASO-DOPO, which captured the free radical in the gaseous phase and formed a compact silica-rich char layer in the condensed phase. More importantly, the incorporation of FPASO-DOPO not only increased the limiting oxygen index from 17.0% to 26.1% but also reduced the total smoke release by 17.5%. A cone-calorimeter test indicated that the peak heat-release rate of the modified foam was reduced by 33.7% compared with that of neat RPUF. Calculations determined that the flame retardancy index (FRI) value was 7.88 for a modified foam, which shows a “good” flame retardancy. Moreover, the modified foams exhibited improvements in both compressive and flexural strength owing to the introduction of the rosin. This study has important implications for the development of modified polymers with good flame and smoke suppression from renewable resources.
研究领域:
材料科学
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化学工程
✓ 已验证
产品关联
DOI
高影响因子
NEW JOURNAL OF CHEMISTRY
·
2021
·Vol. 45
·期 31
·13902-13908
·
IF 3.591
Leiyi Fan,Rui Wang,Qian Zhang,Shuaizhuo Liu,Ruijie He,Ruiyang Zhang,Min Shen,Xin Xiang,Ying Zhou
Discharge of oily sewage causes serious environmental pollution and waste of resources, which can be solved by the process of oil/water separation. Polyurethane foam is a kind of promising candidate material for oil/water separation. In this work, a series of hydrophobic/lipophilic polyurethane foams were prepared by the in situ self-foaming method. The as-prepared polyurethane foams exhibited abundant open pore structures, excellent stability and superior hydrophobicity/lipophilicity. Thus, the as-prepared polyurethane foams can selectively absorb various oils/organic solvents from static and dynamic oil/water mixtures. The maximum absorption capacity for pump oil was up to 75.0 g g−1, and the separation fluxes were 1.5 × 106 L m−3 h−1 and 3.0 × 105 L m−3 h−1 for layered and turbulent oil/water mixtures, respectively. Moreover, the as-prepared polyurethane foams can separate the oil-in-water emulsions with a separation efficiency of >99% and a separation flux of 2.7 × 105 L m−3 h−1. The large-scale preparation of hydrophobic polyurethane foams by this method confirmed their potential in practical applications.
研究领域:
材料科学
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环境科学
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化学工程
✓ 已验证
产品关联
DOI
高影响因子
POLYMERS FOR ADVANCED TECHNOLOGIES
·
2021
·Vol. 32
·期 11
·4531-4546
·
IF 3.665
Sujie Yang,Bing Zhang,Mengru Liu,Yadong Yang,Xinliang Liu,Depeng Chen,Bibo Wang,Gang Tang,Xiuyu Liu
Using phytic acid (PA) and piperazine (Pi) as raw materials, piperazine phytate (PA-Pi) was fabricated by simple ionic reaction. Furthermore, A series of rigid polyurethane foam/piperazine phytate (RPUF/PA-Pi) composites were prepared by one-step water-blown technology. Thermogravimetric (TG) results showed that the addition of PA-Pi improved the thermal stability of RPUF/PA-Pi composites at high temperature. At 700°C, RPUF/PA-Pi20 exhibited the highest carbon residue of 25.8 wt%. Cone calorimetry and smoke density tests suggested that PA-Pi could reduce the heat and smoke release during combustion process of the composites, thus reducing their fire hazard. Thermogravimetric-Fourier transform infrared spectroscopy (TG-FTIR) indicated that PA-Pi significantly inhibited the release of toxic gases (isocyanate compounds, aromatic compounds, CO and HCN) and flammable gases (hydrocarbons and esters) during the decomposition process of RPUF/PA-Pi composites, effectively improving fire performance of the composites. Scanning electron microscope (SEM), Raman and Fourier transform infrared spectroscopy (FTIR) were used to characterize the carbon residue of RPUF/PA-Pi composites. The results showed that PA-Pi could promote the formation of dense carbon layer of composites and effectively prevented heat and mass transfer in the combustion process.
研究领域:
材料科学
·
燃烧学
✓ 已验证
产品关联
DOI
高影响因子
DESALINATION
·
2023
·
IF 9.9
Jing Jiang,Ruiru Yang,Zerong Tao,Sheng Tu
Renewable solar energy meeting photothermal materials provides a promising approach for freshwater production via interfacial steam generation. The design and manufacture of high-performance evaporators are still highly anticipated for practical applications. Herein, the robust and durable solar evaporator is proposed and fabricated by integration of photothermal Cu-CuO x /NC (CNC) and three-dimensional porous structure heat-insulated polyurethane (PU) foam with polyvinyl alcohol (PVA)/sodium alginate (SA) modifications. The designed PVA-SA-CNC/PU simultaneously possesses fast water transmission, broadband light trapping, satisfactory mechanical robustness and effective heat confinement. When applied as a solar evaporator, the PVA-SA-CNC/PU exhibits a high evaporation rate of 1.99 kg m −2 h −1 and operates stably within ten consecutive cycles under one-sun illumination, which can also handle salt tolerant desalination of seawater and saline water to sustainably produce freshwater. In addition, the functional versatility of the fabricated evaporator is explored to purify various wastewater. This study establishes a highly efficient integrated evaporator with multitasking water purification towards the solution of water shortage.
研究领域:
能源科学
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材料科学
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环境科学
✓ 已验证
产品关联
DOI
高影响因子
PROGRESS IN ORGANIC COATINGS
·
2023
·
IF 6.6
Ju Huang,Leting Yang,Wei Wang,Bin Yu,Chengfei Cao,Zhuyun Bi,Jue Wang,Jian Shen,Lei Song
Constructing fire-protective coatings has been to be an effective strategy for reducing fire hazards of polymeric materials. However, it remains a huge challenge to fabricate high-performance flame retardant coatings with biodegradability, excellent mechanical and thermal properties, as well as strong adhesion. Herein, inspired by snails exhibiting strong adhesion to a variety of surfaces by interfacial hydrogen-bonding, a biomimetic , highly adhesive, supramolecular nano-coating consisting of a tannic acid (TA)-functionalized hexagonal boron nitride nanosheets (TA-BNNS), TA and polyvinyl alcohol (PVA) was prepared by using a hydrogen-bond self-assembly strategy of solvent volatilization regulation. TA-BNNS was prepared via an efficient and green ball milling exfoliation method under mild conditions. Dynamically regulating the hydrogen bonds between PVA and TA molecules through the volatilization of ethanol was to achieve physical cross-linking. Then such a nanocoating was applied for surface treatment of rigid polyurethane foam (RPUF), which exhibiting excellent flame retardant properties. Compared to pure RPUF, the peak heat release rate (PHRR) and peak smoke production rate (PSPR) of the TA/PVA@BNNS coated RPUF were reduced by ~52.4 % and ~53.4 %, respectively. Therefore, this work provides new approach to the design and manufacture of green, efficient and non-toxic flame retardant materials.
研究领域:
材料科学
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化学工程
·
纳米技术
✓ 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
Lumiao Hou,Xiaofan Zhang,Haowei Liu,He Zheng,Bolin Niu,Jianwei Zheng,Shaohua Liu,Jianwei Fu
We proposed a feasible strategy to prepare a rigid-flexible coupled polyphosphazene supported polyurethane foam (PUF-PCP) adsorbent by in situ polycondensation between hexachlorocyclotriphosphazene and polyethyleneimine on the surface of polyurethane foam (PUF) at room temperature . Owing to combination of the open cell porous structure of PUF support and the superior adsorption capacity of PCP coatings, the PUF-PCP composite adsorbent exhibited good adsorption behavior towards anionic dyes. Especially, the experimental adsorption capacity of PUF-PCP for methyl orange (MO) dye was up to 978.56 mg g −1 at 25 ºC. The relative separation factors of MO for methylene blue , crystal violet and rhodamine B were 224.1, 78.1 and 161.8 respectively, exhibiting an excellent adsorption selectivity of PUF-PCP towards MO. Moreover, the used PUF-PCP adsorbent can be easily collected and regenerated. The adsorption test data were best explained by Langmuir model and pseudo-second-order model. The adsorption process of MO onto PUF-PCP was spontaneous and endothermic. XPS and FT-IR analysis confirmed that electrostatic adsorption and hydrogen bonding were the plausible uptake mechanism of PUF-PCP for MO molecules. The present work demonstrated that PUF-PCP has promising potential in removing environmental anionic pollutants from waterbody.
研究领域:
环境科学
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材料科学
✓ 已验证
产品关联
DOI
高影响因子
ENERGY
·
2023
·
IF 9
Richeng Lian,Mingyu Ou,Haocun Guan,Jiahui Cui,Junxiu Piao,Tingting Feng,Jinyong Ren,Yaxuan Wang,Yaofei Wang,Lei Liu,Xilei Chen,Chuanmei Jiao
Rigid polyurethane foam (RPUF) has received extensive attention as an energy-saving building material . However, it is still a great challenge to easily fabricate multifunctional RPUFs that combine excellent mechanical properties, flame retardancy, and thermal insulation . Herein, ammonium polyphosphate was chemically modified with 2-aminobenzimidazole (APP@Abz) through an ion exchange reaction. It has been found that APP@Abz is well-dispersed in RPUF matrix. FR-RPUF3 containing 10.0 wt% of APP@Abz shows excellent thermal insulation performance with a 5% increase in thermal conductivity compared to virgin RPUF. In addition, FR-RPUF3 exhibits ultrahigh flame retardancy and smoke suppression (total heat release, total smoke production, and smoke factor decreased by 50.61%, 61.90%, and 64.70%, respectively) in comparison to virgin RPUF. More importantly, FR-RPUF3 exhibits improved mechanical properties and hydrophobicity compared to virgin RPUF. This study is of great importance for the development and application of building insulation materials.
研究领域:
建筑材料
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化学工程
·
能源材料
✓ 已验证
产品关联
DOI
高影响因子
CELLULAR POLYMERS
·
2014
·
IF 0.6
Wenming Zhang,Ling Li,Qing Li,Xiaowei Li,Yucang Zhang
In this study, Faba bean stalk was liquefied for the production of biopolyols and polyurethane (PU) foams. The influences of various reaction conditions on biopolyols and PU foams were examined. Furthermore, the property relationships between biopolyols and PU foams were investigated. Biopolyols produced under the liquefaction conditions of 160°C, 90 min, 3% sulfuric acid loading, and 20% Faba bean stalk loading showed promising material properties (i.e. hydroxyl number, 496.1 mg KOH/g, acid number, 17.9 mg KOH/g, and viscosity, 1.1 Pa.s). PU foams produced from promising biopolyols showed compressive strength of 205 kPa and density of 0.035 g/cm3. The results suggested that in addition to density, the compressive strength of PU foams might also be affected by factors such as biomass residues or the chemical structures of biopolyols. The biopolyols and PU foams produced showed material properties comparable to those of conventional PU foams.
研究领域:
材料科学
·
生物化学
✓ 已验证
DOI
高影响因子
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
·
2019
·
IF 2.931
Yan Su,Dan Zhang,Peng Jia,Weichen Gao,Youbing Li,Zhuyu Bai,Xin Liu,Qunying Deng,Jing Xu,Chaolong Yang
Developing novel rare-earth complexes to rapidly and reliably sensing anions in pure water is highly challenging. Here, a series of long fluorescence lifetime polyurethane foam bonded Tb(BAA) 3 chromophore porous material (Tb-PUFs) have been designed and synthesized via a simple one-step co -polycondensation reaction as an efficient fluorescent sensor for H 2 PO 4 − in pure water. All Tb-PUFs exhibited strong green emission and long fluorescence lifetime in water, which was ascribed to Tb-complex can be dispersed very well in polyurethane foam, effectively avoiding the emission quenching of Tb 3+ ions caused by water molecules vibration. The titration experimental results showed that precursor Tb(BAA) 3 can effective recognize F − , CH 3 COO − , and H 2 PO 4 − in DMSO solution. Interestingly, Tb-PUFs can only selectively recognize H 2 PO 4 − in pure water, this phenomenon can be explained that H 2 PO 4 − is acidic, and can occur deprotonation with -NH group of ligand BAA , thus making the fluorescence quenching effect was more sensitive for H 2 PO 4 − in pure water. In addition, the sensing ability of Tb-PUFs for H 2 PO 4 − is highly reversible by washing them with deionized water for three times. In a word, all results implied that Tb-PUFs was an excellent candidate for H 2 PO 4 − ions detection selectively in pure water.
研究领域:
分析化学
·
材料科学
✓ 已验证
DOI
PubMed
高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2015
·Vol. 132
·期 46
·
IF 1.768
Fubin Luo,Kun Wu,Yinwen Li,Jian Zheng,Huilong Guo,Mangeng Lu
With a shell of poly (methyl methacrylate-co-hydroxyl ethyl acrylate) (PMMA-HA), microencapsulated ammonium polyphosphate (MHAPP) is prepared by in situ polymerization. The core-shell structure of the reactive flame retardant (FR) is characterized by Fourier transform infrared (FTIR) and scanning electron microscopy/energy dispersive spectroscopy (SEM/EDS). The results of water leaching rate and water contact angle measurements show that ammonium polyphosphate (APP) is well coated by a hydrophobic shell. Due to the presence of active groups (–OH) and hydrophobic groups (–CH 3 ) in shell, MHAPP exhibits better compatibility, flame retardancy, and water resistance compared with neat ammonium polyphosphate (APP) in rigid polyurethane foam (PU). Compression strength of PU/MHAPP with suitable loading is higher than that of PU/APP and PU, the reason is that the active groups in shell can improve the compatibility of MHAPP in PU composite. From thermal stability and residue analysis, it can be seen that the presence of reactive flame retardant shows positive effect on thermal stability of PU composite at high temperature, results also indicate that MHAPP can promote the carbonization formation efficiency of PU composite during combustion process compared with APP. © 2015 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2015 , 132 , 42800.
研究领域:
材料科学
·
高分子化学
✓ 已验证
DOI
高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2025
·
IF 2.8
Longyu Hao,Qiang Wang,Kuan Liang,Wanli Li,Hao Wei
Crude oil spills pose a significant pollution threat to the marine environment. Effective cleanup methods tailored for high-viscosity oil spills are essential. This study initially investigated the influence of pore size on the water and oil absorption capacities of reticulated polyurethane foam (PUF). Comparative experiments conducted with five distinct pore sizes ranging from 0.9 to 2.27 mm revealed that PUF with a pore size of 1.17 mm exhibited optimal adsorption performance for high-viscosity heavy oil (with an adsorption capacity of 38.0 g/g), albeit accompanied by a notable defect in water absorption (water absorption rate of 22.1 g/g). To address the poor hydrophobicity of the 1.17 mm PUF, modifications were introduced using polydopamine (PDA) and polyhedral oligomeric silsesquioxane (POSS) to develop a hydrophobic–oleophilic PUF@PDA-POSS composite material. The results indicated a 69.6% reduction in water absorption capacity for PUF@PDA-POSS compared to pure PUF (decreasing to 6.71 g/g), while the heavy oil adsorption capacity remained unchanged (at 39.1 g/g). After undergoing 10 adsorption–cleaning–regeneration cycles, PUF@PDA-POSS maintained over 90% of its initial adsorption performance, demonstrating excellent cyclic stability. This material combines high hydrophobicity, strong oil absorption capacity, environmental friendliness, and durability, thereby possessing significant application value in oil–water separation and marine oil spill remediation.
研究领域:
材料科学
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
COMPOSITES PART B-ENGINEERING
·
2025
·
IF 14.2
Baozheng Zhao,Fei Song,Zheng Pan,Yijiao Xue,Linfeng Tian,Tiancheng Zhang,Li Tan,Rui Yang,Yonghong Zhou,Meng Zhang
At present, thermoset polyurethane foams were mainly derived from petroleum-based resources and faced inherent challenges such as difficulty in recycling and fire hazard. In this study, tung oil and catechol were used to prepare tung oil-derived polyphenols via Friedel-Crafts alkylation reaction. These polyphenols were combined with isocyanate to synthesize tung oil-derived polyurethane (TPU) foam. With the presence of dual dynamically cross-linked phenol-carbamate bonds, the TPU foam could be hot-pressed several times into a smooth and homogeneous TPU film. To improve the fire resistance and compressive strength of TPU foam, phytic acid functionalized metal-organic frameworks (UiO-66-NH 2 @PA) flame retardants were successfully synthesized by one-pot solvothermal method. By adding 20 wt% of flame retardants, the TPU composite foams achieved a UL-94 V-0 flammability rating with a limiting oxygen index of 28.1 vol%. The total heat release, total smoke release, CO production and CO 2 production of the TPU composite foams were reduced by 43.1 %, 57.8 %, 63.6 % and 62.1 %, respectively, compared to the pure TPU foam. Furthermore, the compressive strength of the TPU composite foam continued to increase with increasing flame retardants content, reaching a maximum of 0.55 MPa. Importantly, the introduction of the flame retardants didn't affect the hot-press recycling performance of the TPU foam, but instead improved the tensile strength and flame retardancy of the recycled TPU film. This work paved the way to produce bio-based PU foam with excellent flame retardancy and recyclability.
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）