Sustainable Chemistry and Pharmacy
·
2025
·
IF 5.8
Mengjie Jia,Yani Wang,Yiyang Qi,Xiaoge Ji,Zhongyuan Zhao,Shijing Sun
In the plywood industry, formaldehyde-based adhesives are commonly used, but the health risks associated with them are a significant concern. As a result, there has been a growing emphasis on developing formaldehyde-free alternatives. This study presents an eco-friendly adhesive formulated from vinyl acetate-ethylene (VAE) copolymer emulsion and polyvinyl alcohol (PVA). The synthesis conditions, curing behavior, synthesis mechanisms and curing mechanisms were further investigated. The optimal preparation conditions were as follows: VAE emulsion and 4 % PVA1788 were synthesized at 90 °C for 2 h, and the solid content was adjusted to 50 % by adding distilled water. Subsequently, 5 % pMDI was incorporated. The wet shear strength of the resulting adhesive, which is 0.93 MPa, met the requirements of the Chinese national standard GB/T 9846-2015 (≥0.7 MPa) for Class II plywood. The curing behavior of the VAE-PVA adhesive was investigated by measuring the insoluble mass proportion and thermal analysis. The results showed that when the adhesive was heated at 130 °C for 10 min, the insoluble mass proportion reached 81.16 %, and an endothermic reaction occurred at approximately 100 °C. To investigate the synthesis mechanism of VAE-PVA adhesive, FT-IR analysis revealed that esterification occurred between the VAE emulsion and the hydroxyl groups in PVA. Additionally, FT-IR analysis, XPS analysis, and Py-GC/MS analysis were used to explore the curing mechanism of the VAE-PVA adhesive. The results indicated that during the curing process, pMDI polymerized with the vinyl groups in the VAE emulsion and the hydroxyl groups in PVA, forming a three-dimensional network of cured polymer.
研究领域:
材料科学
·
化学工程
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产品关联
DOI
高影响因子
Surfaces and Interfaces
·
2025
·
IF 6.3
Jianyang Liu,Wei Wang,Zhipeng Mao,Lin Cao,Meiyan Yu,Shougang Chen
Metal corrosion and rusting have caused significant losses to humans, and environmentally friendly and efficient rust removal methods are receiving increasing attention. Here, we propose a method for rust removal by synthesizing acrylic gel on Q235 steel sheet using a photopolymerization reaction. The weak acidity of acrylic acid decomposes rust, and the gel formed by the reaction of acrylic acid with acrylamide has strong adsorption capacity, which effectively adsorbs rust molecules and metal ions. The introduced Cu 2 O enhances the rust removal system. Cu 2 O reacts with the acrylic acid monomer to form a monovalent copper complex, which can improve the rust removal efficiency during the process through redox reactions. The UV-induced copolymerization of acrylic monomers to form gel enables effective rust removal, with a rust removal rate as high as 85.94 g ·h –1 ·m –2 . This method avoids the use of strong acids commonly found in traditional rust removal methods, offering advantages such as environmental friendliness and low cost. The gel formed during the rust removal process can be easily and conveniently removed from the substrate surface, thus avoiding secondary pollution issues such as waste liquid disposal.
研究领域:
材料科学
·
腐蚀与防护
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环境工程
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产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2024
·
IF 13.3
Lu He,Gege Bao,Xi Yu,Xiaofeng Zhang,Xiaobei Jin,Zixuan Yu,Ying He,Rong Zhang,Daochun Qin
Developing environmentally friendly methods for modifying bamboo is important. This study proposed a method to enhance the flame retardancy of bamboo through calcium alginate (CaAlg) forming and hydroxyapatite (HAP) mineralization. Scanning electron microscopy and elemental analysis demonstrated that HAP was uniformly deposited within and on the surface of bamboo cells with the assistance of CaAlg. The residue yield of the treated bamboo increased by 49.8% and 40.7% under air and nitrogen atmospheres, respectively. The limiting oxygen index increased from 23.4% to 26.6%. Furthermore, compared to the untreated bamboo, the treated bamboo exhibited reductions of 45.2%, 25.8%, 25.6%, and 30.7% in peak heat release rate, total heat release, peak smoke production, and total smoke release, respectively. The layer of CaAlg and HAP particles cross-link within the bamboo cells, forming a dense protective barrier that prevented the entry of heat, flammable gases, and the release of toxic smoke. The mechanical properties of the bamboo were not reduced by this gentle treatment. The mineralized bamboo fabricated using this method showed potential as a sustainable building material due to its improved flame retardancy and mechanical properties.
研究领域:
材料科学
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生物质工程
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产品关联
DOI
高影响因子
NEW JOURNAL OF CHEMISTRY
·
2021
·Vol. 45
·期 25
·11371-11379
·
IF 3.591
Zheming Zhang,PingPing Jiang,Dekai Liu,Shan Feng,Yan Leng,Pingbo Zhang,Agus Haryono,Zhenhua Li,Yuchao Li
With increasing attention to the environment and health, the demand for environmentally friendly plasticizers, which were applied to produce phthalate-free flexible poly(vinyl chloride) (PVC), is becoming more and more urgent. In this work, a novel high efficiency plasticizer, an ester-capped oligomeric lactic acid mixture (EOL), was successfully synthesized by a two-step esterification reaction, with L-lactic acid as the main raw material. The structure of EOL was characterized by using FT-IR, 1H NMR and time of flight mass spectrometry (TOF-MS). The plasticizing performance of EOLs in PVC was tested and compared with those of commercial environmental plasticizers acetyl tributyl citrate (ATBC) and di-2-ethylhexyl terephthalate (DOTP). According to the results of tensile tests, the elongation at break of PVC plasticized by 50 phr EOLs reached 725.5%, indicating its superior mechanical properties. The result of TGA showed that the thermal stability of PVC plasticized by EOLs was as comparable as that of PVC plasticized by DOTP or ATBC. Furthermore, compared with ATBC and DOTP, EOLs showed better migration resistance in the leaching test. All test results showed that the comprehensive performance of EOLs was better than those of commercial green plasticizers ATBC and DOTP, which provided a new method for the development of novel green plasticizers.
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
ACS Sustainable Chemistry & Engineering
·
2020
·
IF 7.632
Peng Liu,Cong Ma,Ying Li,Liming Wang,Linjie Wei,Yinlei Yan,Fengwei Xie
This work demonstrates a facile and “green” method to prepare eco-friendly, flexible, transparent, and ionically conductive starch-based materials, which have great potential for personal health-monitoring applications such as disposable electrodes. This method relies on the use of the CaCl2 solution and enables both the efficient disorganization and amorphization of high-amylose starch granules with low energy consumption and the reinforcement of the starch chain network by starch–metal cation complexation. Specifically, the method involves a simple mixing of a high-amylose starch with the CaCl2 solution followed by heating the mixture at 80 °C for 5 min. The whole process is completely environmentally benign, without any waste liquid or bioproducts generated. These resulting materials displayed tunable mechanical strength (500–1300 kPa), elongation at break (15–32%), Young’s modulus (4–9 MPa), toughness (0.05–0.26 MJ/m3), and suitable electrical resistivity (3.7–9.2 Ω·m). Moreover, the developed materials were responsive to external stimuli such as strain and liquids, satisfying the requirements for wearable sensor applications. Besides, composed of only starch, CaCl2, and water, the materials are much cheaper and eco-friendly (can be consumed by fish) compared with other polymer-based conductive hydrogels.
研究领域:
材料科学
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生物医学工程
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产品关联
DOI
高影响因子
ACS Sustainable Chemistry & Engineering
·
2017
·
IF 5.951
Jiabin Feng,Yiqi Sun,Pingan Song,Weiwei Lei,Qiang Wu,Lina Liu,Youming Yu,Hao Wang
Despite extraordinary mechanical properties and excellent biodegradability, poly(lactic acid) (PLA) still suffers from a highly inherent flammability, restricting its wide applications in the electric and automobile fields. Although a wide range of flame retardants have been developed to reduce the flammability, so far, they normally compromise the mechanical strength of PLA. Herein, we have demonstrated the fabrication of a novel core–shell nanofibrous flame-retardant system, PN-FR@CNF, through in situ chemically grafting the phosphorus–nitrogen-based polymer onto the cellulose nanofiber (CNF) surface. The results show that adding 10 wt % PN-FR@CNF enables PLA to achieve a V-0 flame resistance rating during vertical burning tests and to exhibit a dramatically reduced peak heat release rate in cone calorimetry measurements, indicating a significantly reduced flammability. In addition, the tensile strength of PLA also increases by around 24% (about 72 MPa). This work offers an innovative methodology for the design of the unique integration of extraordinary flame retardancy and mechanical reinforcement into one hierarchical nanostructured additive system for creating advanced green polymeric materials.
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
AICHE JOURNAL
·
2023
·Vol. 69
·期 12
·e18240
·
IF 3.7
Yaqun Han,Jingyuan Hu,Xingzuo Li,Yue Wu,Jie Ren,Shufen Zhang,Suli Wu
The problems of difficult dyeing, poor dyeing fastness, and dyeing pollution of aramid are always great obstacles in the practical application. In theory, constructing particular nanostructures instead of dyes on aramids to achieve bright structural colors will be an effective strategy. However, it is still challenging to construct particular nanostructures on aramid fabric surfaces because of their roughness. Here, beautiful and noniridescent structural colored aramids with excellent light fastness were achieved by spraying a thin layer of randomly distributed nanospheres on the surface of adhesive-modified aramids. Moreover, different bright structural colors and colorful patterns were obtained by simply controlling the size or refractive index of the spheres. Importantly, the light fastness of the structural colored aramid can reach levels 6–7 or higher. The simple and eco-friendly coloring technology can be compatible with industrial equipment to obtain stable multicolored aramid products, exhibiting great real potential applications.
研究领域:
材料科学
·
纺织工程
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF HAZARDOUS MATERIALS
·
2024
·
IF 12.2
Yunhui Li,Yixiong Chen,Jialin Qing,Zuoying Cao,Shengxi Wu,Qinggang Li,Mingyu Wang,Wenjuan Guan,Guiqing Zhang
The efficient recovery of nickel from chloride systems has long presented a challenge in the field. While solvent extraction is a viable approach, conventional extractants have been associated with drawbacks such as a high requirement for chloride ions and substantial consumption of acids and alkalis. In response to these challenges, this investigation developed and synthesized a novel thiazole-based extractant, N, N-Bis(4-thiazolylmethyl)octylamine (NNBT), tailored for the selective extraction of nickel from chloride systems. Findings from the study indicate that the nitrogen atom situated on the benzylamine framework within NNBT can interact synergistically with the chelating thiazole ring, facilitating effective nickel extraction and notably reducing the need for chloride ions. Furthermore, the extractant can be regenerated using deionized water , thereby obviating the necessity for additional consumption of acids and alkalis. Following the validation of NNBT as an environmentally sustainable and efficient nickel extractant within the chloride ion system, it was successfully employed to selectively and effectively extract nickel from the nickel-aluminum slag of spent HDP catalyst. The extracted nickel and aluminum were subsequently processed into electroplated nickel chloride and polyaluminum chloride, respectively, meeting the national standards of China. These outcomes underscore the eco-friendliness and promise of NNBT for nickel extraction from chloride systems.
研究领域:
冶金工程
·
环境科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2024
·
IF 13.3
Jianming Liao,Yansu Hou,Xi Zhang,Jun Li,Min Zhang,Yunyuan Dong,Qifu Zheng,Xiaobin Chen
Traditional plastic foam, typically derived from fossil fuel-based polymers that are resistant to natural degradation, faces environmental challenges. As an alternative, cellulose, a biodegradable polymer, shows promise in the production of eco-friendly foam. Nonetheless, its reliance on hydrogen bonding between fibers poses limitations for practical applications. Here, drawing inspiration from bird nest structures, a straightforward and scalable method (co-assembly and thermal welding) has been developed for creating cellulose-PLA biofoam. The resulting biofoam displays advantageous properties such as low density (12.9 ∼ 27.1 kg/m 3 ), high compression strength (modulus of 12.1 MPa·cm 3 ·g −1 ), good thermal stability, and water stability (maintaining structural integrity in water). Moreover, it exhibits exceptional degradation rates (significant degradation within 40 days) and recyclability. Thus, this biofoam holds promise as a sustainable alternative to standard plastic foams, mitigating “white pollution.”
研究领域:
材料科学
·
环境科学
·
生物工程
✓ 已验证
产品关联
DOI
高影响因子
Polymers
·
2024
·Vol. 16
·期 2
·182
·
IF 4.7
Yuhan Zhu,Fei Guo,Jing Li,Zhen Wang,Zihui Liang,Changhai Yi
Warp sizing is a key process in textile production. However, before the yarn/fabric finishing, such as dyeing, the paste adhering to the warp must be eliminated to ensure optimal dyeing properties and the flexibility of the fabric. Therefore, the sizing will often consume a lot of energy and produce a lot of industrial wastewater, which will cause serious harm to the environment. In this study, we have developed an energy saving and environmentally friendly starch-based slurry by modifying natural starch with acrylamide. The paste has excellent viscosity stability and fiber adhesion, and exhibits excellent performance during warp sizing. In addition, the slurry has good water solubility at 60–70 °C, so it is easy to desize at low temperatures. Because of this, the sizing of the warp can be deslimed directly from the yarn during subsequent washing processes. This work can not only reduce some costs for the textile industry, but also achieve the purpose of energy conservation and emission reduction.
研究领域:
纺织科学
·
材料科学
·
环境科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
INDUSTRIAL CROPS AND PRODUCTS
·
2024
·
IF 5.6
Xinde Bao,Xiaofan Li,Yepan Zhong,Sifan Fan,Zurong Huang,Xin Guan,Xiaoyun Chen,Jinguo Lin
To enhance the flame-retardant and smoke-suppression of fast-growing wood, Chinese fir ( Cunninghamia lanceolata (Lamb.) Hook .) was impregnated with environmentally friendly, non-toxic, and green flame retardants and subsequently characterized. The results indicated that compared with unmodified wood, the thermal stability and fire resistance of modified wood were improved, the total heat release of delignification (DWM) and non-delignification (NWM) modified decreased by 47.08 % and 27.87 %, respectively, the total smoke production decreased by 18.24 % and 98.14 %, respectively, and the weight gains of modified wood was significantly increased by 67.12 % and 24.26 %, respectively. The impregnation and filling of composite flame retardants interfered with the crystalline regions of wood and reducing then by 26.86 % and 27.22 %, respectively, but did not change the crystal structure of wood. The appearance of Si-O-C, Si-O-Si, Si-O, Al-O, and P-O characteristic peaks confirmed that the composite flame retardants were not only physically filled but also chemically bound in the wood and formed a gel cross-linked network structure. According to the microscopic morphology observations, the composite flame retardants were uniformly distributed in the wood, and delignification reduced the color difference on the wood surface. Therefore, the composite flame retardant modified wood can be widely used as a decorative material. Simultaneously, this material reduces the possibility of fire, reduces the emission of harmful gases, and enhances environmental protection and human safety.
研究领域:
材料科学
·
林业科学
✓ 已验证
产品关联
DOI
高影响因子
ENERGY
·
2023
·
IF 9
Bingyou Jiang,Zhuang Liu,Yang Zhao,Xiaoyi Zhang,Xiao-Han Wang,Ben Ji,Yi Zhang,Jinshan Huang
This study aims to develop eco-friendly composite dust suppressants to mitigate the adverse impact of coal mine dust on worker health and the environment. An environmentally friendly dust suppressant with bonding and wetting effects was prepared by combining modified pectin as a binder and a non-toxic surfactant as a wetting agent. Optimal ratios of sodium carboxylate ethoxylate sulfate (LMES), isomeric alcohol ethoxylate (XL-70), and modified pectin were determined through experiments. The modified pectin exhibited stronger wetting properties on coal powder due to its increased hydrophilicity . Wetting performance tests confirmed its excellent performance. Film-forming and scanning electron microscope tests demonstrated the dust suppressant's ability to bond with coal dust, resulting in a smooth surface and closely connected particles. Environmental tests showed its non-toxicity and degradability. Spraying dust reduction tests revealed a significant average increase of 40.51 % in dust reduction rate compared to water spraying, effectively lowering dust concentration. These findings have practical implications for the development of eco-friendly composite dust suppressants and controlling underground dust in coal mines, benefiting worker health and environmental sustainability.
研究领域:
材料科学
·
环境科学
·
矿业工程
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）