ACS Sustainable Chemistry & Engineering
·
2024
·
IF 7.1
Jiajun Liu,Yuan Liu,Zhiyi Hou,Tian Ju,Yuhan Lou,Zhihan Tong,Shi Liu,Jinsong Sun,Qinqin Xia,Haipeng Yu
Lignin, being the most abundant renewable aromatic polymer, exhibits immense potential in sustainable biobased epoxy adhesives. However, the tedious preparation process and uncontrolled homopolymerization of epoxidized lignin hinder their large-scale production. Herein, we propose a facile one-step strategy to synthesize a high-performance waterborne lignin-based epoxy adhesive based on the high selectivity of the phenol-epoxy reaction. Owing to the acidity difference between phenol and aliphatic hydroxyl, the phenolic hydroxyl groups in lignin can be preferentially initiated with epoxy groups, which inhibit the reaction on polyglycidol chain propagation. The resulting epoxidized lignin nanoparticles (ELNPs) feature nanoscale (150–250 nm), low molecular weight, and high epoxy value (∼3.84 mmol g–1). The ELNP colloidal dispersions possess high zeta potentials (−34.20 mV) and impressive long-term storage stability (temperature = 4–60 °C, pH = 2–12). The use of cost-effective ELNPs as a wood adhesive has shown a competitive shear strength of ∼14.89 MPa, comparable to those of commercial bisphenol A epoxy resin and phenol-formaldehyde resin. The thermo-curing ELNPs demonstrate excellent chemical solvent resistance and thermal stability (∼395 °C). Additionally, the one-step fabrication of ELNPs demonstrates good scalability (≥15 kg) and commercial viability (472 €/ton) in wood adhesives. This one-step synthetic strategy provides a promising pathway for producing high-performance and cost-efficient lignin-based epoxy resins that can be used as sustainable adhesives.
研究领域:
材料科学
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化学工程
·
可持续发展
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF HAZARDOUS MATERIALS
·
2025
·
IF 11.3
Xincheng Zhang,Changqing He,Muhmmad Youssef Muhmmad Mostafa,Waseem Akram,Lin He,Hong Sui,Xingang Li
Separation of oil-water emulsions co-stabilized by solid particles and natural interfacially-active components has always been a challenge in petroleum and coal industry. Herein, we constructed and synthesized an interfacially-active nonionic material by esterification and polymerization, which contains multiple oxygen-containing groups (-COOH, -C-O, -COOR) and aromatic rings. The lab bottle tests show that this polymer (1000 mg/L) could completely break the silica-asphaltene co-stabilized water-in-heavy oil emulsions at 60 °C within 45 min, much faster and higher than those of commercial and reported demulsifers (>75 °C, >90 min). Mechanistic study by interfacial characterization and molecular dynamics simulation shows that this newly synthesized polymer possesses multiple hydrogen bonding sites and delocalized π bonds. These functional groups and active sites play the vital role in reconstructing and breaking the interfacial film by non-covalent interactions reconstruction, repelling the coated heavy fractions (e.g., asphaltenes) from the fine solids surface. The introduction of aromatic rings with delocalized π bonds into the polymer provides it with a solubilizing effect on asphaltene and promotes the dispersion of asphaltene aggregation, enhancing the demulsification efficiency. In addition, these hydrogen bonding sites can also build connecting bridges between emulsified droplets, facilitating the coalescence of them. This work would provide insights for developing efficient functional materials for low-carbon separation of complex emulsions in industry, including oily sludges, water-in-oil emulsions.
研究领域:
化学工程
·
材料科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2024
·
IF 13.3
Yueqian Liu,Yu Rong,Yuanjin Zeng,Jiangkai Bao,Zhuqun Shi,Chuanxi Xiong,Quanling Yang
The TEMPO-oxidized cellulose nanofibril (TOCN) is a green, renewable, recycled material with high performance developing natural, environmentally friendly triboelectric materials. However, the performance of natural polymer triboelectric materials needs to be further improved. In this work, a novel high-performance TOCN-based triboelectric material was prepared and enhanced by increasing oxygen-rich groups and porous structure by regulated TEMPO-mediated oxidation and direct freeze-drying process. Oxygen-rich groups and porous structures synergistically boosted the surface charge density of the material during contact separation to enhance the triboelectric output performance. The open-circuit voltage of the triboelectric nanogenerator (TENG) was realized to be enhanced by 36 % and 84.5 %, respectively, with the power density up to 1.003 W/m 2 . Meanwhile, finite element analysis calculations further verified that the oxygen-rich groups help to increase the surface charge density of the material and make electron transfer easier. This study provides a new strategy for preparing high-performance, environmentally friendly, biocompatible biomass triboelectric materials.
研究领域:
材料科学
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能源与环境科学
✓ 已验证
产品关联
DOI
高影响因子
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
·
2019
·
IF 3.375
Chuan Yu,Hongxu Liu,Jiafei Lyu,Zixing Xiao,Peng Bai,Xianghai Guo
A series of alkoxy groups are introduced to the UiO-66 structure to enhance its adsorption performance toward acetic acid in water. The adsorption kinetics, isotherm, thermodynamics, and regeneration of these adsorbents have been investigated, and the excellent adsorption capacity of n-propyloxy-substituted adsorbent (UiO-66-3) is illustrated. The adsorption of acetic acid on UiO-66-3 was a complex multistep process, and the close contact between O of the ether bond of the adsorbent and H of the carboxyl group of acetic acid played an important role in adsorption. The kinetic results could be fitted well to the pseudo-second-order model. The adsorption isotherm followed the Langmuir isotherm, which indicated that the adsorption process involved a strong interaction between adsorbate and adsorbent. The thermodynamic parameters (ΔG, ΔH, and ΔS) had also been calculated, which verified that acetic acid adsorption on UiO-66-3 was a spontaneously endothermic process. The adsorbent exhibited good stability under specified experimental conditions, which consolidated its potential as a solution to wastewater containing dilute acetic acid.
研究领域:
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
E-POLYMERS
·
2022
·Vol. 22
·期 1
·411-429
·
IF 3.074
Wenhao Yu,Weijun Yang,Pengwu Xu,Chunfa Dai,Qingsheng Liu,Piming Ma
The application of poly(lactic acid) (PLA) has been limited in flame-retardant field, and flame-retardant modification usually deteriorates its mechanical properties. In this study, a reactive flame-retardant hexa(ethylene oxide)-cyclotriphosphazene (HCCP-EP) was synthesized and used to improve the fire retardancy of PLA. As a result, the limiting oxygen index of PLA increased from 19.5% to 27.3% with an addition of 3 wt% HCCP-EP, and the PLA/HCCP-EP blend reached to underwriters laboratories (UL)-94 V-0 rating. The cone calorimeter test results showed that the peak heat release rate and total heat release of PLA decreased by 12.6% and 18.5%, respectively. Interestingly, the tensile strength of PLA increased slightly after the incorporation of HCCP-EP. The improved mechanical properties are ascribed to the fine dispersion of HCCP-EP and the coupling reaction between the epoxy groups of the HCCP-EP and the terminal groups of PLA during the melt processing.
研究领域:
材料科学
·
火灾安全工程
✓ 已验证
DOI
高影响因子
POLYMER BULLETIN
·
2023
·
IF 3.2
Xiong Ao,Li Junqian
Fabrication of waterproof decorative paintings has attracted a great deal of interest. In this work, in situ reaction using poly(glycidyl methacrylate) (PGMA) and polyhedral oligomeric silsesquioxane with amino group at end (amino-POSS) was utilized to fabricate coatings at surfaces of papery/cloth decorative paintings via spray, which endowed the decorative paintings with excellent hydrophobicity, transparency, and weather ability. Firstly, ring opening of epoxy groups in PGMA, cross-linking structure in coatings, and strong coating/painting interface adhesion were achieved. Then, surface morphology of coatings was observed, and high surface roughness was confirmed. Next, high transparency and thermal stability of coatings were confirmed. Finally, surface water-contact-angles (WCAs) of coatings with various substrates were tested as a function of POSS content. Weathering resistances of coating surface on cloth substrate were studied. Coatings exhibit excellent properties such as high light transmittance (over 80%), high glass-transition temperature (upper limit ~ 113 ℃), high hydrophobicity (maximum WCA ~ 149°), and strong weathering resistances (the aged WCAs over 140°). Work innovation lies in simultaneously gained high hydrophobicity, good transparency, and strong weather ability. This work might pave a road for fabricating excellent coatings for protecting decorative paintings.
研究领域:
材料科学
·
文物保护
✓ 已验证
产品关联
DOI
高影响因子
ACS Omega
·
2021
·
IF 3.512
Xinhua Liu,Peng Yan,Yinchun Fang
Structural color as a revolutionary coloration strategy has been proposed to replace the traditional dyeing and printing process. However, the poor colorfastness and easy crack formation of structural colors on textile fabrics restrict their practical application at present. In this study, poly (tert-butyl acrylate-co-glycidyl methacrylate) (P(t-BA-co-GMA)) copolymers containing reactive epoxy groups with different mass ratios of tert-butyl acrylate (t-BA) and glycidyl methacrylate (GMA) were successfully synthesized, which were used to create structural colors on black polyester fabrics. The results showed that P(t-BA-co-GMA) nanospheres could form crack-free structural colors on polyester fabrics, and the colors vary with the mass ratio of t-BA and GMA to obtain five different colors. The different particle sizes of the different P(t-BA-co-GMA) nanospheres with different refractive indexes and the arrangement of short-range ordered and long-range disordered in microstructures may be the reason of different angle-independent structural colors on polyester fabrics. The P(t-BA-co-GMA) nanosphere structural colors on polyester fabrics possess good abrasion and washing colorfastness. This research provides the experimental basis for the development of crack-free amorphous photonic crystal structural color on fabrics with high colorfastness to promote the practical application of structural color in textile coloration.
研究领域:
材料科学
·
纺织工程
·
高分子化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
NEW JOURNAL OF CHEMISTRY
·
2020
·Vol. 44
·期 11
·4538-4546
·
IF 3.288
Mei Wang,Shouhai Li,Haiyang Ding,Jianling Xia,Mei Li
In the present work, tung-oil-derived imide epoxidized esters (GEABTMI) were prepared and used as poly(vinyl chloride) (PVC) co-stabilizers. Characterization results confirmed the successful preparation of the targeted material. The thermal stabilizing effects of CaSt2/ZnSt2/GEABTMI (St: stearic acid) were compared with those of CaSt2/ZnSt2/ABTMI {ABTMI: N-(3-amino-benzoic acid) tung-maleimides} and CaSt2/ZnSt2. The experimental results showed that of the materials tested, CaSt2/ZnSt2/GEABTMI could provide the best long-term thermal stability for PVC. According to the thermal stability results and characterization, the simultaneous introduction of imide and epoxy groups into the GEABTMI structures was responsible for the excellent performance of the stabilized PVC. Furthermore, a mechanism for the stabilization of the PVC/CaSt2/ZnSt2/GEABTMI system was proposed. According to this proposal, the imide groups trapped the labile chlorine atoms removed from the PVC chain and reacted with the unstable macromolecular radical of PVC, disrupting in this way the radical chain degradation of PVC; and the epoxy group acted as an HCl absorber at the subsequent stages of degradation, avoiding in this way the harmful effects caused by the presence of HCl. Apart from the better stabilization performance, CaSt2/ZnSt2/GEABTMI yielded a PVC plasticization performance similar to those resulting from the use of the other stabilizers.
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
CHEMICAL ENGINEERING JOURNAL
·
2023
·
IF 15.1
Wenqing Wang,Hao Li,Yongquan Zhou,Jianming Pan
The emulsion method is a typical way for the preparation of nanomaterials, however, it usually requires a lot of energy and surfactants to form and stabilize of emulsions. A critical factor limiting its application is to control the morphology of the material by modulating the size of the emulsion droplets. In this work, a novel solid-water–oil (S-W-O) system based on the integration of metastable emulsion and salt template method was proposed, and the functionalized silica nanosheets were prepared by the one-pot method. The size of the prepared nanosheets is relatively uniform, with a length of 800 to 1200 nm and a width of about 200 nm. Subsequently, a large number of epoxy group sites were introduced into the nanosheets relying on distillation precipitation polymerization, and the polyol groups were successfully loaded. Finally, the polyol-functionalized nanosheet adsorbent (NS@GMA-NMDG) was obtained and applied for the rapid removal of boron. NS@GMA-NMDG shows favorable adsorption performance for boric acid in solution, with a maximum adsorption capacity of about 35.49 mg g −1 based on the Langmuir model fitting and a fast adsorption rate of about 30 min to reach 96.3% of the adsorption equilibrium concentration. Remarkably, the investigation of the formation mechanism of nanosheets reveals that salt plays an important role in the S-W-O system. This study not only puts forward a novel method of designing and synthesizing nanosheet adsorbents, but also the application of surfactant-free and low-energy emulsification reflects the concepts of energy saving and clean production, which provides fresh inspirations for the development of new environmentally friendly adsorbents.
研究领域:
材料科学
·
环境科学
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
LANGMUIR
·
2024
·
IF 3.7
Cuicui Guo,Yiling Wang,Yijing You,Mingjun Chen,Ka Zhang,Shengmiao Zhang
Many advanced materials are designed for the removal of heavy metal ions from water. However, materials for eliminating trace heavy metal ions from wastewater to meet drinking water standards remain a major challenge. Herein, epoxy group-functionalized open-cellular beads are synthesized by UV polymerization of a water-in-oil-in-water system. The epoxy groups are further transformed into diethylenetriaminepentaacetic acid (DTPA) with hexamethylene diamine as a bridging agent. The resulting material (DTPA@polyHIPE beads) can eliminate trace Cu(II), Cr(III), Pb(II), Fe(III), or Cd(II) from water. When 0.15 g of DTPA@polyHIPE beads are used to adsorb metal ions of 20 mg in 100 mL of water, the residue concentrations of Cu(II), Cr(III), Pb(II), Fe(III), and Cd(II) are reduced to 0.08, 0.06, 0.02, 0.09, and 0.07 mg/L, respectively. The adsorption efficiencies of the beads for these ions are all higher than 99.55%. The adsorbent is durable and exhibits good recyclability by retaining an adsorption capacity of ≥91% after 5 cycles. The negative values of ΔG in the adsorption process indicate that the adsorption is feasible and spontaneous. The chemical adsorption follows the Freundlich adsorption model, indicating a multilayer heterogeneous adsorption. The DTPA@polyHIPE beads have a great potential application in dealing with trace heavy metal ion polluted water.
研究领域:
环境科学
·
材料科学
✓ 已验证
DOI
高影响因子
CHINESE JOURNAL OF CATALYSIS
·
2025
·
IF 17.7
Lin Dong,Zhiqiang Fang,Qianbo Yuan,Yong Fan,Yong Yang,Ping Wang,Shixiong Sheng,Yanqin Wang,Zupeng Chen
Many strategies have been proposed to produce arenes from lignin as liquid fuel additives. However, the development of these methods is limited by the low yield of products, low atom utilization, and inefficient lignin depolymerization. Herein, we develop an energy-efficient synthetic method for the production of high-carbon-number arenes from sustainable lignin with a total yield of 23.1 wt%. Particularly, high carbon number arenes are obtained by fully utilizing the formaldehyde stabilizing additive and the methoxy group in lignin. The process begins with the reductive depolymerization of formaldehyde-stabilized lignin, followed by transmethylation between lignin monomers over Au/Nb 2 O 5 catalyst, and the Ru/Nb 2 O 5 -catalyzed hydrodeoxygenation. This work demonstrates the potential of value-added arenes production directly from lignin.
研究领域:
生物化学
·
可再生能源
✓ 已验证
产品关联
DOI
高影响因子
Polymer Chemistry
·
2016
·Vol. 7
·期 40
·6202-6210
·
IF 5.687
Yaochen Zheng,Shengying Cai,Li Peng,Yu Jin,Han Xu,Zhulin Weng,Zhengguo Gao,Bo Zhao,Chao Gao
We have coined a new term, group interval-controlled polymers (GICPs), to describe the unique structure of macromolecules with a tunable functional group interval. The precise control of a polymer main chain structure itself is still a big challenge, let alone the purposeful control of group interval simultaneously. Here, we successfully synthesized a series of epoxy GICPs via one-step UV-triggered thiol–yne polymerization of commercial glycidyl propargyl ether and dithiols at 0 °C. Subsequently, α,ω-thiols of each epoxy GICP were capped by two allyl glycidyl ethers via a thiol–ene click reaction, affording a stable product. Their unique group interval-controlled chemical structures were confirmed by a combination of nuclear magnetic resonance (NMR), gel permeation chromatography (GPC) and pyrene-fluorescent probe tests. Moreover, the epoxy groups within the GICPs were highly reactive and could be further functionalized and turned into a diverse range of customized groups such as azide, tertiary amino, thioester, and hydroxyl, etc. Therefore, a series of GICPs with designed functional groups are readily achieved on a large scale. Our work presents a reliable synthetic methodology for GICPs, paving a new way for the precise structure control of artificial macromolecules.
研究领域:
高分子化学
·
材料科学
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）