ACS Applied Materials & Interfaces
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2020
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IF 8.758
Liang Ren,Jianxin Chen,Qing Lu,Jian Han,Hong Wu
Membrane fouling, caused by aggregation of organics and microorganisms from filtrate on the membrane surface, seriously reduces the service life of a nanofiltration (NF) membrane. Developing facile and renewable antifouling modification methods without sacrificing separation properties of the membrane remain an imperative requirement. Herein, a thin-film composite (TFC) NF membrane with a light-responsive and regenerable functional layer (P-TFC) was fabricated via host–guest interactions between the azobenzene (guest) labeled functional polymers and the β-cyclodextrin (host) bonded membrane surface (H-TFC). The P-TFC-3 not only showed outstanding antifouling ability and high flux recovery ratio (FRR > 90% at the fourth antiadhesive test) but also exhibited enhanced water permeability (17.9 L m–2 h–1 bar–1) and high selectivity (αMgSO4NaCl = 33.4 and fast antibiotics enrichment capacity) compared with the pristine membrane. Furthermore, when the functional layer was contaminated, it can be removed by ultraviolet light irradiation and a new functional layer can be rebuilt by adding fresh azobenzene labeled functional polymers. After several regeneration processes, the membranes still showed constant separation properties and high flux recovery ability (FRR > 90%). This work proposes an easy-to-assemble and regenerable surface modification strategy to endow TFC NF membranes with excellent fouling resistance and sustainable utilization ability while maintaining high separation properties.
研究领域:
材料科学
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环境工程
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DOI
高影响因子
Nanomaterials
·
2021
·Vol. 11
·期 10
·2488
·
IF 5.076
Jian Gao,Ziming Li,Ziqi Deng,Meihua Liu,Wei Wei,Chunbai Zheng,Yifan Zhang,Shusen Chen,Pengyang Deng
Mercury is one of the most toxic heavy metals that can cause terrible disease for human beings. Among different absorption materials, MOF (metal–organic framework) materials show potential as very attractive materials for the rapid removal of mercury. However, the instability and difficulty for regeneration of MOF crystals limit their applications. Here, a continuous sulfur-modified MOF (UiO-66-NHC(S)NHMe) layer was synthesized in situ on polymeric membranes (PP non-woven fabrics) by post-synthetic modification and used for rapid mercury removal. The MOF-based membrane (US-N) showed high selectivity for mercury in different aqueous systems, which is better than sulfur-modified MOF powders. A thinner MOF layer on US-N showed a much better mercury ion removal performance. US-N with a 59.3 nm MOF layer could remove more than 85% of mercury in 20 min from an aqueous solution. In addition, the US-N can simply regenerate several times for mercury removal and maintain the initial performance (removal ratio > 98%), exhibiting excellent durability and stability. This work promotes the application of MOF materials in the rapid removal of hazardous heavy metal ions from practical environments.Keywords:metal–organic frameworks;membrane;mercury removal;rapid;regenerable
研究领域:
环境科学
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材料科学
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产品关联
DOI
PubMed
高影响因子
Coatings
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2023
·Vol. 13
·期 10
·1726
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IF 3.4
Lei Chen,Weiyu Luo,Yima He,Lizhen Huang,Jinjie Xu,Kaixin Li,Yonggang Min
The development of renewable polymers as alternatives to the petroleum-based ones has received significant attention due to the increasing depletion of fossil oil and the associated environmental concerns. In this study, a semi-biomass-based polyimide (PI) film was successfully synthesized, using biomass-derived furfural (HMFA) as one of the raw materials. A two-step approach was first developed for this process: (1) conversion of HMFA to 3,3,4,4-biphenyltetracarboxylic acid dianhydride (BPDA) and (2) polymerization of BPDA with p-phenylenediamine (PPD) to form a PI film. The fabricated PI film demonstrated excellent properties, such as a high thermal decomposition temperature up to 600 °C, a satisfactory glass transition temperature (Tg) exceeding 365 °C, a coefficient of thermal expansion (CTE) of ≈30 ppm/K, a tensile strength greater than 120 MPa, a dielectric constant value below 3.4, a dielectric loss value of less than 0.02, and a 24 h water absorption rate below 0.8%. These performances are comparable to the petrochemical-based PI. This work offers a promising strategy for utilizing biomass-derived materials in polyimide synthesis and would drive a new wave of advancements in polymer science.Keywords:furfural;BPDA;polyimide;biomass;renewable polymer
研究领域:
材料科学
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聚合物化学
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可持续材料
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产品关联
DOI
高影响因子
Polymers
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2017
·Vol. 9
·期 12
·640
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IF 3.364
Jie Chen,Ke Li,Yigang Wang,Jinrui Huang,Xiaoan Nie,Jianchun Jiang
A novel renewable plasticizer based on castor oil, epoxidized glycidyl ester of ricinoleic acetic ester (EGERAE), was synthesized and applied into Poly(vinyl chloride) (PVC) for the first time. Its molecular structure was characterized by FT-IR and1H NMR. The effects of replacement of petroleum-based commercial plasticizer dioctyl phthalate (DOP) with EGERAE in poly(vinyl chloride) (PVC) films were researched. Thermal stability, dynamic mechanical property and mechanical properties of PVC films were investigated with thermogravimetric analysis (TGA), dynamic mechanical analysis (DMA) and tensile tests. The results indicated that this castor oil-based plasticizer was able to improve the thermal stability of PVC blends when partially of completely substituting for DOP. Furthermore, EGERAE endowed PVC resin with enhanced flexibility. In addition, the exudation, volatility and extraction resistance characteristics of plasticizers were researched. The degradation mechanism and possible interaction between EGERAE and PVC molecules in the plasticized system were also investigated.Keywords:poly(vinyl chloride);renewable plasticizer;thermal stability;castor oil
研究领域:
材料科学
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化学工程
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DOI
PubMed
高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
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2020
·Vol. 137
·期 39
·49189
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IF 2.52
Silong Zhang,Zhengzai Cheng,Sheng Zeng,Guangyao Li,Jing Xiong,Ling Ding,Mario Gauthier
Vanillic acid, potentially derived from biosourced feedstocks, was used as starting material in the synthesis of novel polyesters. A diester obtained by esterification and etherification of vanillic acid served as first monomer, in combination with resorcinol bis(2-hydroxyethyl) ether, hydroquinone bis(2-hydroxyethyl) ether, or aliphatic diols with different carbon chain lengths as second monomers, and antimony trioxide as catalyst to synthesize a series of polyesters by melt polymerization. The materials obtained had polystyrene-equivalent M n = 10,000–19,500 g/mol and M w = 19,300–39,500 g/mol. Thermal analysis yielded melting temperatures of 76–114°C and onset decomposition temperatures T 5% = 321–360°C. Dynamic mechanical and tensile testing confirmed that polyesters derived from vanillic acid have properties superior to poly(ethylene terephthalate) (PET). Aqueous degradation experiments with bulk polyester samples at different pH over 16 weeks led to intrinsic viscosity decreases of 9–23% under neutral conditions (pH 7), 10–26% under acidic conditions (pH 3), and 7–19% under alkaline conditions (pH 12). The results obtained show that the good thermal stability and degradability of vanillic acid-based polyesters, and the tunability of the properties of these materials through selection of the diol monomer used in their synthesis, make them excellent biosourced replacements for commercial polyesters such as PET.
研究领域:
材料科学
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有机化学
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产品关联
DOI
高影响因子
Scientific Reports
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2021
·Vol. 11
·期 1
·1-11
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IF 4.38
Hu Keling,Sui Huachao,Zhao Dongping
Naturally occurring nipagin and eugenol were used as the collaborative starting materials for poly(ether ester) polymers. In this study, two series of nipagin and eugenol-derived copoly(ether ester)s, PHN1 1−x E1 x and PHN1 1−x E2 x (x = 0%, 5%, 10%, 15%, 20%), were prepared with renewable 1,6-hexanediol as a comonomer. The nipagin-derived component acts as the renewable surrogate of petroleum-based dimethyl terephthalate (DMT), while the eugenol-derived component acts as the cooperative property modifier of parent homopoly(ether ester) PHN1. 1,6-Hexanediol was chosen as the spacer because of its renewability, high boiling point, and short chain to enhance the glass transition temperatures ( T g s) of materials. The molecular weights and chemical structures were confirmed by gel permeation chromatograph (GPC), NMR and FTIR spectroscopies. Thermal and crystalline properties were studied by thermal gravimetric analysis (TGA), differential scanning calorimetric (DSC) and wide-angle X-ray diffraction (WXRD). The tensile assays were conducted to evaluate the mechanical properties. The results suggested that properties of this kind of poly(ether ester)s could be finely tuned by the relative content of two components for the desired applications (elastomer, rubbery) suitable for different scenarios from polyethylene glycol terephthalate (PET) and polybutylene terephthalate (PBT).
研究领域:
材料科学
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有机化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
POLYMER
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2012
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IF 3.438
Aifang Luo,Xuesong Jiang,Jie Yin
Soybean oil containing thioxanthone (TX) moieties and/or coinitiator DBA (ESO-ATX-DBA, ESO-ATX/ESO-DBA) were synthesized by grafting 2-acitic thioxanthone (ATX) and 4-(dimetheylamino) benzoic acid (DBA) to the backbone of epoxidized soybean oil (ESO). The obtained ESO-ATX-DBA, ESO-ATX and ESO-DBA were characterized by FT–IR, 1 H NMR and UV–vis spectra, and investigated as photoinitiators by photo-DSC. Photoinitiator systems ESO-ATX-DBA and ESO-ATX/ESO-DBA were more efficient than their low-molecular weight analogues (chemical mixture of ETX-DBA and physical mixture of ETX/EDB) especially in the photopolymeriztion of acrylate monomers containing pigment. Moreover, ESO-ATX-DBA exhibited much lower migration in comparison with their low-molecular weight analogues. These characteristics gave the obtained TX containing soybean oil potential in the application of ink, and these studies also provide alternative approach to prepare polymeric photoinitiators from the renewable source.
研究领域:
材料科学
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化学工程
✓ 已验证
DOI
高影响因子
JOURNAL OF POLYMERS AND THE ENVIRONMENT
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2024
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IF 4.7
Zhao Yanna,Zhang Yingying,Bai Xiaowei,Wang Yuqi,Hou Wentong,Huang Yuqing
Conventional epoxy anhydride curing systems typically require large amounts of catalyst to ensure a high ester exchange rate, and the resulting cured epoxy vitrimer has renewable and self-repairing properties, but is limited by the amount of catalyst loading. In this study, a diol (VT) containing imine bonds was synthesized from vanillin (VAN) and tyramine (TA) to catalyze the epoxy-anhydride curing process, and glycerol triglycidyl ether (GTE) was co-cured with VT and methylhexahydrophthalic anhydride (MHHPA), which constructed a bio-based regenerative and repairable epoxy vitrimer with dual dynamic covalent bonds (GMV), the free hydroxyl groups in the crosslinked network could rapidly promote the ester exchange rate. The thermal, mechanical, solvent resistance, self-repairing, renewable and shape memory properties of GMV were systematically investigated by adjusting the ratio of anhydride and hydroxyl groups. It exhibits a better thermal stability property T d 5% (281.27℃) and a shorter relaxation time τ (12.15 s) at 140 °C. In addition, the scratches of GMV could be almost completely healed at 120 °C for 60 min, and this test demonstrated that GMV has better self-healing and renewable tests. The present work promotes the epoxy vitrimer species and expands the esterification scheme performed without catalyst.
研究领域:
材料科学
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化学工程
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产品关联
DOI
高影响因子
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
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2020
·
IF 5.162
Zichao Yin,Xiaojun Sun,Mutai Bao,Yang Li
Hydrophobic/oleophilic absorbents have been largely studied and used in recovering spilled oil. However, they still suffer from several drawbacks and two of them are poor biocompatibility and hard to thoroughly rinse. In order to address these problems, here a hydrophobic magnetic chitosan-based aerogel is fabricated via electrostatic interactions between chitosan (CS), itaconic acid (IA) and Fe 3 O 4 nanoparticles and dip-coating in ethanol solution of Candelilla wax (CW). Due to the interconnected porous structure of chitosan-based aerogel, the magnetism of Fe 3 O 4 nanoparticles and the hydrophobicity of CW, the prepared aerogel exhibits high absorption capacities (from 17.7 to 43.8 g/g) towards various types of organic liquids, excellent magnetic controllability with saturation magnetization of 15.93 emu/g and good water repellency with water contact angle (WCA) of 147.9°. In addition, the aerogel can also continuously separate immiscible oil/water mixtures and water-in-oil emulsions as the form of filter. More significantly, the absorbed organic liquids can be completely recovered by simply placing the aerogel in water solution of IA at 75 °C, which can avoid cleaning agent consumption. As a consequence, this renewable, biodegradable and eco-friendly oil scavenger presents a bright prospect in practical applications.
研究领域:
材料科学
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环境科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
INDUSTRIAL CROPS AND PRODUCTS
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2020
·
IF 4.244
Xiuying Zhao,Tao Shou,Riran Liang,Shikai Hu,Peng Yu,Liqun Zhang
The gradual exhaustion of conventional fossil fuels makes it significant to develop renewable materials. Thermoplastic polyurethane (TPU), offering the advantages of processability and recyclability of thermoplastics, is gaining increasing attention for economic and environmental concerns. Despite the broad range of applications, the production of TPU is still highly dependent on fossil-based polyols and isocyanates. The development of sustainable polyols and isocyanates that derived from non-petrochemical sources is highly desirable. Notably, polylactic acid (PLA) is acknowledged as the most promising material in the bio-based polymer sector. In this research, we attempt to use the PLA-derived polyol as a renewable raw material to synthesize PLA-based TPUs. The properties of the PLA-based TPUs are comprehensively characterized by Fourier Transform Infrared Spectroscopy (FTIR), Gel Permeation Chromatography (GPC), Differential Scanning Calorimetry (DSC), Dynamic Mechanical Analysis (DMA), and tensile testing. The results showed that the TPUs based on PLA derivative exhibit a balanced mechanical property. Notably, the TPUs exhibit pronounced damping property around room temperature, enabling it as a promising damping material. And its mechanical performances were well maintained while damping performance was markedly enhanced after multiple reprocessing cycles. The value of this work lies in the fact that well-balanced properties of bio-based TPUs have been achieved by the use of renewable poly (lactic acid) derived component, which might be fruitful for increasing the renewable content of TPUs for a sustainable world.
研究领域:
材料科学
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生物工程
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产品关联
DOI
高影响因子
CHEMOSPHERE
·
2021
·
IF 7.086
Kexin Chen,Danni Ma,Haoyang Yu,Shan Zhang,Barnabas C. Seyler,Zimo Chai,Shuming Peng
Biochar has been widely recognized as an environmentally efficient adsorbent for removing heavy metals. However, considering the weak adsorption performance of the original biochar to the oxygen-containing anion, the adsorption of vanadium by biochar has rarely been investigated. This study proposes that H 3 PO 4 activated biochar made from an invasive plant species growing near mines is a novel material to be investigated for V(V) recovery and reuse. As a noxious, invasive plant, Lantana camara L. (LC) has become widely naturalized around the world. Biochar was prepared from LC by pyrolysis at different conditions (200 °C, 350 °C, 500 °C, and 650 °C). The adsorption effect of biochar with and without P pretreatment on V(V) in aqueous solution was compared. The results show that biochar prepared from LC impregnated with H 3 PO 4 (MLBC) had the highest adsorption capacity at 500 °C, and the maximal adsorption capacity fitted by Langmuir model was 77.38 mg g −1 , which was considerably higher than that of untreated biochar (LBC, 5.89 mg g −1 ). The adsorption procedure was substantially fitted by the Langmuir isotherm and the pseudo-second-order kinetic. Additionally, the interaction of V(V) on MLBC is pH-dependent, and slightly acidic conditions are more favorable for adsorption. The characterization results indicated that electrostatic interaction, complexation reaction, and redox reaction were the primary mechanisms. After three cycles of adsorption, the final maximal adsorption capacity of MLBC remained at 76.03% of that of the virgin sample, demonstrating that MLBC had a recyclable capability to eliminate and restore V(V) from aqueous solutions.
研究领域:
环境科学
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材料科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
FUEL PROCESSING TECHNOLOGY
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2023
·
IF 7.5
Jie Xu,Xiaowei Liu,Rui Li,Boxiong Shen,Zijian Zhou,Lidan Deng,Lei Liu,Xinbo Zhu
Converting CO 2 into renewable fuel via photocatalysis is of significance to solving the energy crisis and climate change. However, the limited electron transfer in single catalysts always limits the reduction reaction. In this work, a p-n heterojunction was constructed between Cr doped MgAl–LDH (abbreviated as LDH) and Co 3 O 4 for visible-light-driven fuel production. Since LDH and Co 3 O 4 both have the sufficient potentials to drive CO 2 photoreduction, the constructed type-II heterojunction is more favorable for electron utilization efficiency. The optimal Co 3 O 4 /LDH heterojunction exhibited the highest CO evolution rate of 7.42 μmol•g −1 •h −1 and a CO selectivity of 90.5% with TEOA as sacrificial agent . The further characterizations highlight that the addition of Co 3 O 4 greatly improves the light absorption and the heterojunction effectively promotes the reverse migration of electrons and holes. This work investigates and verifies the designed type-II heterojunction based on MgAl–LDH, which has the guidance for the design of heterojunction catalysts and promotes the practical application of MgAl–LDH in photocatalytic region.
研究领域:
材料科学
·
环境科学
·
能源科学
✓ 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）