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Engineered Heterostructure Photocatalyst: Chitosan-Coated Chromium Ferrite/Graphite Oxide Synthesized Hydrothermally for Environmental Remediation
IF 4.7 3区 工程技术 Q2 ENGINEERING, ENVIRONMENTAL Pub Date : 2024-11-02 DOI: 10.1007/s10924-024-03433-z
Shabnam Sheshmani, Nazila Mohammad Hosseini

This study reports the hydrothermal synthesis and characterization of a chitosan-coated chromium ferrite/graphite oxide (CrFe2O4/GO/CS) nanocomposite with enhanced photocatalytic performance. The unique combination of the semiconductor properties of chromium ferrite, the light-harvesting capabilities of graphite oxide, and the stabilizing and adsorptive properties of chitosan resulted in a synergistic enhancement of the photocatalytic activity. The nanocomposite was characterized using FT-IR, Raman, XRD, zeta potential, DRS, BET, SEM, and EDS techniques. BET analysis revealed a specific surface area of 418.56 m²/g and a pore diameter of 2 nm for the CrFe2O4/GO/CS nanocomposite. The band gap of the nanocomposite was determined to be 3.5 eV, compared to 2.9 eV for CrFe2O4 and 2.95 eV for CrFe2O4/GO. The photocatalytic performance was evaluated through the degradation of Reactive Red 198 (R198) and Brilliant Blue FCF 133 (B133) dyes under UV and sunlight irradiation. The CrFe2O4/GO/CS nanocomposite demonstrated superior dye removal efficiency compared to CrFe2O4 and CrFe2O4/GO, achieving up to 98.2% removal for R198 at pH 8 and 98.5% for B133. The nanocomposite also showed excellent reusability, maintaining 81% removal efficiency for R198 and 77.6% for B133 after three cycles. Kinetic studies revealed that the dye removal process followed a pseudo-second-order model with R² values of 0.99 for both dyes. The nanocomposite demonstrated effective performance in real textile wastewater treatment, achieving 91.5% dye removal efficiency. The enhanced photocatalytic performance, coupled with the nanocomposite’s reusability, highlights its potential for practical applications in water purification and environmental remediation.

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引用次数: 0
Thermo-Activated Shape Memory Films Based on Chitosan Reinforced With Silk Fibroin, Obtained by an Environmentally Friendly Process Using a Deep Eutectic Solvent
IF 4.7 3区 工程技术 Q2 ENGINEERING, ENVIRONMENTAL Pub Date : 2024-11-02 DOI: 10.1007/s10924-024-03445-9
Maaya Oliver-Cadena, Gonzalo Santos-Lopez, Edgar Otocani Figueroa-Pérez, Frank Manuel León- Martínez, Muzaffer A. Karaaslan, Scott Renneckar, Miguel C. Gutiérrez

The high environmental impact of petroleum-based polymer has led to the study and application of biopolymers. Silk fibroin and chitosan are biopolymers with high potential for this, but current processes for obtaining films cast with silk fibroin pose significant environmental impacts including the need for use of toxic solvents and additional costs incurred through the required dialysis process. In this work it was proposed to obtain films based on chitosan and reinforced with silk fibroin, using a deep eutectic solvent formed by mixing choline chloride and citric acid. Glycerol was also added to some samples to study its effects as a plasticizer. Shape memory programming was established with tension tests to determine its fixation ratio and application of hot air at 75 °C. Two different activation temperatures were used to observe the recovery ratio, 75 and 50 °C. Silk fibroin helped improve the thermal and mechanical behavior of the films. Shape memory in these films is mainly explained by hydrogen bonding between chitosan and eutectic solvents. Films presented a recovery ratio between 86 and 54%. While shape memory was not significantly influenced by the presence of silk fibroin on its own, the shape memory activation temperature, the plasticization of chitosan by glycerol, and the mechanical reinforcement of silk fibroin enables control of the shape memory parameters of chitosan films. This behavior will allow for its potential application in areas such as biomedicine in actuators for prostheses or as smart packaging in the food industry.

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引用次数: 0
Chitosan Modified Diatomite Cross-Linked with Sodium Alginate and Polyethyleneimine Composite Gel Particles for Efficient Removal of Copper and Lead Ions
IF 4.7 3区 工程技术 Q2 ENGINEERING, ENVIRONMENTAL Pub Date : 2024-10-29 DOI: 10.1007/s10924-024-03436-w
Jianjun Sun, Zongrui Zhang, Mengyun Yu, Weiwei Xu, Guona Bai, Yixin Xiang, Mengqun Li

The utilization of advanced adsorbents for the removal of heavy metal ion pollution from organic dyes and industrial wastewater has garnered significant research interest. In this study, a novel composite gel consisting of chitosan modified diatomite (DE/CS), sodium alginate (SA), and polyethyleneimine (PEI) (DE/CS-PEI@SA) was synthesized using the ion crosslinking method. The composite gels were analyzed by scanning electron microscopy (SEM), X-ray diffraction (XRD), differential scanning calorimetry/thermal gravimetric analysis (DSC/TGA), and Brunauer–Emmett–Teller systems (BET). Their adsorption properties and mechanisms towards copper Cu(II) and lead Pb(II) ions were investigated using infrared, X-ray photoelectron spectroscopy (XPS), energy dispersive spectroscopy, (EDS) and Zeta potential analyses. The DE/CS-PEI@SA composite gels exhibited numerous uniform folds on its surface, boasting a specific surface area (18.96 m2/g) and a pore size ranging from 1.5 to 80.0 nm, demonstrating robust thermal stability pre- and post- adsorption. Notably, the composite gels demonstrated impressive adsorption capacities for Cu(II) (174.39 mg/g) and Pb(II) (295.04 mg/g), respectively. The incorporation of DE/CS and PEI into the composite gel contributed to a complex pore structure with numerous accessible sites. The adsorption behavior of the composite gel was effectively described by the pseudo-second-order kinetic model and the Langmuir isotherm model. The primary adsorption mechanism was characterized by single-molecule chemisorption, which encompassed coordination adsorption, ion exchange, and electrostatic attraction. Furthermore, the composite gel demonstrated significant efficiency in adsorption, cost-effectiveness, and ease of separation, making it a promising candidate for wastewater treatment applications.

Graphical abstract

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引用次数: 0
Production and Characterization of Eco-composite Polylactic Acid Films Doped with Carob Pod Powder/Silver Nanoparticles and Their Potential Utilization in Packaging Applications
IF 4.7 3区 工程技术 Q2 ENGINEERING, ENVIRONMENTAL Pub Date : 2024-10-29 DOI: 10.1007/s10924-024-03443-x
Ozlem Erdem, Aysenur Mutlu, Ali Can Yilmaz

This study aims to determine the influence of carob pod powder (CP) on antimicrobial performance, thermal behavior, mechanical strength of poly-lactic acid (PLA) matrix to observe the utilization potential as an environmentally-friendly eco-composite packaging material. Subsequent to pretreatment of CP and PLA, silver nanoparticles (AgNPs) were introduced into PLA matrix. Single-stage extruder was used to enable continuous sheet extrusion and material compounding to procure three different samples of 100 wt% PLA, 80 wt% PLA-20 wt% CP, and 75 wt% PLA-20 wt% CP-5 wt% AgNPs in pellet form. Extruded pellets underwent injection molding for tensile strength tests. The samples were characterized via Scanning Electron Microscopy (SEM), X-ray Diffraction (XRD), and Fourier-Transform Infrared Spectroscopy (FT-IR) analyses. Dynamic Mechanical Analysis (DMA) was carried out on the specimens to achieve glass transition behavior of the samples and compare them to those of Differential Scanning Calorimetry (DSC). Thermo-gravimetric (TG) analysis was conducted to observe thermal stability. Thickness and surface roughness were analyzed using profilometer. Antibacterial performance of eco-composites against Staphylococcus (S. aureus) and Escherichia coli (E. coli) was investigated. Combined effects of pretreated CP and AgNPs incorporation in PLA matrix resulted in 20% increase in tensile strength, 2.2% increase in glass transition temperature. The death rates of E. coli and S. aureus were found to be 87.3%, and 81.3%, respectively. Promising outcomes in the fabrication of packing materials with high sterilization and resilience against heat and mechanical stress were obtained through the combined influence of sample features with accuracy and appropriate parameters in extrusion process.

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引用次数: 0
Liposome-fluidic method for aroma masking of cinnamon essential oil in beverage
IF 4.7 3区 工程技术 Q2 ENGINEERING, ENVIRONMENTAL Pub Date : 2024-10-28 DOI: 10.1007/s10924-024-03444-w
Atefeh Farahmand, Seyedeh Fatemeh Mousavi, Bahareh Emadzadeh , Behrouz Ghorani

In this study, we applied a hybrid protection system for encapsulating cinnamon essential oil (CEO) to achieve higher protection, stability, and masking of its intense odor and taste in a beverage system. The CEO was protected in a liposome system with an optimized formulation that maximized encapsulation efficiency while minimizing particle size, polydispersity index and zeta potential. The optimized liposomal formula (lecithin/cholesterol: 5 and wall/CEO: 7.5) was injected as the dispersed phase of the millifluidic system to produce the CEO-loaded liposome in alginate millicapsules. Size and PDI values of optimized liposome were 0.18 and 252.33 nm, respectively. Zeta potential of liposome (-33.03 mV) also confirmed its stability, and CEO was encapsulated in the liposome with high efficiency (81.40%). The feasibility of this novel liposomal-hybrid system for masking the odor and taste of CEO was evaluated in an acidic beverage. The results revealed that samples fortified with hybrid liposomal CEO yielded less cinnamaldehyde (about 20%) in the headspace than those with liposomal CEO. Accordingly, the encapsulation of CEO-loaded liposomes using the liposome-fluidic method considerably affected the release of aromatic compounds from the liposome. It successfully controlled the intense odor of essential oil. The organoleptic results confirmed the HS- GC/MS results.

{"title":"Liposome-fluidic method for aroma masking of cinnamon essential oil in beverage","authors":"Atefeh Farahmand,&nbsp;Seyedeh Fatemeh Mousavi,&nbsp;Bahareh Emadzadeh ,&nbsp;Behrouz Ghorani","doi":"10.1007/s10924-024-03444-w","DOIUrl":"10.1007/s10924-024-03444-w","url":null,"abstract":"<div><p>In this study, we applied a hybrid protection system for encapsulating cinnamon essential oil (CEO) to achieve higher protection, stability, and masking of its intense odor and taste in a beverage system. The CEO was protected in a liposome system with an optimized formulation that maximized encapsulation efficiency while minimizing particle size, polydispersity index and zeta potential. The optimized liposomal formula (lecithin/cholesterol: 5 and wall/CEO: 7.5) was injected as the dispersed phase of the millifluidic system to produce the CEO-loaded liposome in alginate millicapsules. Size and PDI values of optimized liposome were 0.18 and 252.33 nm, respectively. Zeta potential of liposome (-33.03 mV) also confirmed its stability, and CEO was encapsulated in the liposome with high efficiency (81.40%). The feasibility of this novel liposomal-hybrid system for masking the odor and taste of CEO was evaluated in an acidic beverage. The results revealed that samples fortified with hybrid liposomal CEO yielded less cinnamaldehyde (about 20%) in the headspace than those with liposomal CEO. Accordingly, the encapsulation of CEO-loaded liposomes using the liposome-fluidic method considerably affected the release of aromatic compounds from the liposome. It successfully controlled the intense odor of essential oil. The organoleptic results confirmed the HS- GC/MS results.</p></div>","PeriodicalId":659,"journal":{"name":"Journal of Polymers and the Environment","volume":"33 2","pages":"717 - 729"},"PeriodicalIF":4.7,"publicationDate":"2024-10-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143110087","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Preparation and Characterization of IPNs for Controlled Release of 5-Fluorouracil: Evaluation of Possible Use in Wound Dressing
IF 4.7 3区 工程技术 Q2 ENGINEERING, ENVIRONMENTAL Pub Date : 2024-10-24 DOI: 10.1007/s10924-024-03439-7
Gulay Bayramoglu, Alican Yuksel, M. Yakup Arica

A series of interpenetrating polymer networks (IPNs) were prepared in the film form using 2-hydroxypropyl methacrylate (HPMA) polyethylene glycol methacrylate (PEG-MA) and hydroxypropyl-chitosan (HPCH) for controlled release of 5-fluorouracil (5-FU). The prepared IPNs formulations have been characterized using Fourier transform infrared (FTIR) spectroscopy, scanning electron microscopy (SEM), swelling, and contact angle studies. In addition, the platelet adhesion, red blood cell hemolysis, and permeability to 5-FU were also studied with prepared IPNs films. The prepared p(HPMA-co-PEG–MA/HPCH)-1-6 IPNs films were loaded with different amounts of 5-FU and the drug release was studied in a continuous release system. The drug 5-FU has four amine and oxygen groups, and these functional groups interact via hydrogen bonding interaction with PEG-MA and HPCH units of the IPNs, thus, the drug was slowly released. The amount of 5-FU release from the p(HPMA-co-PEG–MA/HPCH) networks increased when the ratio of HPMA decreased or HPCH increased. The antitumor activity of 5-FU released from the prepared IPNs and remaining biological activity was measured using a human hepatocellular carcinoma cell line (SNU398). In vitro studies showed that the tested IPNs formulations were effective for the growth of the SNU398 human hepatocellular carcinoma cells. These experimental results showed that the prepared IPN films exhibited suitable physio-chemical, biocompatibility, and desired drug release profiles, thus, they could be used in various biomedical applications such as wound dressing for skin treatment.

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引用次数: 0
Exploring the Zein/58S Bioactive Glass Nanocomposite for Enhanced Bone Tissue Engineering: A Comprehensive Investigation of Structural, Chemical, Biological, and Osteogenic Properties through in Vitro and in Vivo Studies 探索用于增强骨组织工程的玉米蛋白/58S生物活性玻璃纳米复合材料:通过体外和体内研究对结构、化学、生物和成骨特性的综合研究
IF 4.7 3区 工程技术 Q2 ENGINEERING, ENVIRONMENTAL Pub Date : 2024-10-24 DOI: 10.1007/s10924-024-03432-0
Faezeh Esmaeili Ranjbar, Sanam Mohandesnezhad, Mohamad Javad Mirzaei-Parsa, Fatemeh Asadi, Samalireza Divanpour, Mojgan Noroozi Karimabad, Mahboubeh Vatanparast, Mohammad Reza Mirzaei, Gholamhossein Hassanshahi, Lobat Tayebi, Afsaneh Esmaeili Ranjbar

Bone tissue engineering has emerged as an innovative approach for repairing and regenerating bone defects. This study focuses on the development of new scaffolds with key attributes, including biocompatibility, bioactivity, biodegradability, cost effectiveness, and safety. In this investigation, we designed and synthesized a novel nanofibrous scaffold using the electrospinning method, incorporating zein/58S bioactive glass. The manufactured scaffolds underwent comprehensive characterization for morphology, sustainability, and chemical structure. Moreover, to demonstrate their efficacy in bone healing, we quantified essential factors such as biodegradation rate, contact angle, mechanical strength, bioactivity, cytotoxicity, and cell adherence. Following that, the osteogenesis effect of scaffolds was evaluated in vitro as well as in vivo through implanting them in the calvarium of the rats. Specifically, we conducted detailed investigations using alizarin red staining, real-time PCR, and histopathology, along with immunohistochemistry assessments. Based on our results, the fiber diameters were about 160.2 ± 7 nm, 163.5 ± 38.3 nm, and 164 ± 39.3 nm, respectively for zein, 2%BG, and 4%BG mats. Incorporation of 58 S increased contact angle from 96.03 ± 0.7° to 51.7 ± 2.02°, and consequently improved cell adhesion. The degradation rate of all scaffolds was about 20%, and chemical analysis (FTIR) confirmed the presence of 58 S in zein nanoscale mats. Tensile analysis presented that applying bioactive glass rescued Young’s modulus from 0.34 ± 0.07 to 0.08 ± 0.009 MPa. Meanwhile, other results revealed that 4%BG scaffolds exhibit desirable properties, being porous, safe, bioactive, and osteogenic. These findings robustly affirm the competence and potential of the manufactured nanofibrous scaffold containing 4%BG for applications in bone tissue engineering.

Graphical Abstract

The schematic diagram illustrating different stages of the study, including; zein/BG scaffold synthesis, characterizations and osteogenesis evaluation in vitro and in vivo

骨组织工程已成为修复和再生骨缺损的一种创新方法。本研究的重点是开发具有关键属性的新型支架,包括生物相容性、生物活性、生物降解性、成本效益和安全性。在这项研究中,我们设计并合成了一种新型的纳米纤维支架,采用静电纺丝法,加入玉米蛋白/58S生物活性玻璃。制备的支架进行了形态学、可持续性和化学结构的综合表征。此外,为了证明它们在骨愈合中的功效,我们量化了生物降解率、接触角、机械强度、生物活性、细胞毒性和细胞粘附性等基本因素。随后,通过植入大鼠颅骨,在体外和体内评价支架的成骨效果。具体来说,我们使用茜素红染色、实时PCR、组织病理学以及免疫组织化学评估进行了详细的研究。结果表明,玉米蛋白、2%BG和4%BG的纤维直径分别为160.2±7 nm、163.5±38.3 nm和164±39.3 nm。58 S的加入使接触角从96.03±0.7°增加到51.7±2.02°,从而提高了细胞的粘附性。所有支架的降解率约为20%,化学分析(FTIR)证实玉米蛋白纳米垫中存在58 S。拉伸分析表明,应用生物活性玻璃可使杨氏模量从0.34±0.07 MPa降至0.08±0.009 MPa。同时,其他结果显示4%BG支架具有良好的多孔性、安全性、生物活性和成骨性。这些发现有力地肯定了所制备的含有4%BG的纳米纤维支架在骨组织工程中的应用能力和潜力。图形摘要本研究不同阶段的示意图,包括;玉米蛋白/BG支架的合成、表征及体外和体内成骨评价
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引用次数: 0
Contemporary Breakthroughs and Diverse Chemistry Innovations in Waterborne Polyurethane
IF 4.7 3区 工程技术 Q2 ENGINEERING, ENVIRONMENTAL Pub Date : 2024-10-24 DOI: 10.1007/s10924-024-03437-9
K. L. Chai, Min Min Aung, Davin Yap Kin Yew, Mohd Sukor Su’ait, Azizan Ahmad, Narges Ataollahi, Lee Tian Khoon

Polyurethane, a hydrophobic polymer with limited water solubility, is widely employed in applications including foam insulation, adhesives, coatings, and both flexible and rigid plastics. Waterborne polyurethane (WBPU) has emerged as a focal point due to its water-dispersible nature Its beneficial qualities, such as low emissions of volatile organic compounds (VOCs), simplicity of use, and environmental friendliness, are the reason for its appeal. WBPU is recognized for being non-toxic, non-flammable, and low VOC properties so it can help prevent the pollution of air water rather than increase. Moreover, it exhibits remarkable adhesion properties to a wide range of surfaces, such as glass and polymeric fibres. These exceptional qualities of WBPU have piqued the interest of researchers worldwide. This review focuses on the fundamental principles of WBPU chemistry and explores its physical attributes. It proceeds to provide an extensive examination of various studies, shedding light on the reaction procedures and mechanisms involved. Additionally, the article delves into the modifications introduced in the production process, the selection of source materials, and associated limitations.

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引用次数: 0
Laser-induced Breakdown Spectroscopy and Multivariate Data Analysis Applied to in-line Sorting of Brominated Plastics from Waste Electric and Electronic Equipment 激光诱导击穿光谱和多元数据分析在废旧电器电子设备中溴化塑料在线分选中的应用
IF 4.7 3区 工程技术 Q2 ENGINEERING, ENVIRONMENTAL Pub Date : 2024-10-22 DOI: 10.1007/s10924-024-03438-8
Íñigo Cacho, Iratxe Uria, Paule España, Sixto Arnaiz, Alexander Lopez-Urionabarrenechea

The presence of Persistent Organic Pollutants (POP) in consumer products such as electrical and electronic equipment represents a major obstacle for the recycling of the materials they contain at their end-of-life. Current technologies applied to recover plastics from waste electric and electronic equipment (WEEE) struggle to meet the requirements from recyclers regarding restrictions on some of these POPs, mainly brominated flame retardant (BFR) content. In this study, laser-induced breakdown spectroscopy (LIBS) technique combined with partial least squares regression (PLSR) was investigated for the real-time classification of WEEE plastics based on their total bromine (Br) content, in order to foster their reintroduction into the market as secondary raw materials. With this aim, a classification method was trained and tested in a sorting prototype using mixed plastic samples from TV set and computer monitor housings containing an average of 1.34% of Br. Regardless of polymer colour and type, up to 56% of the tested material could be segregated into a single fraction with a final Br concentration of 1,280 mg/kg. The achieved values met the requirements established in the CENELEC EN 50625 series of standards for the depollution of BFRs (< 2,000 mg/kg of Br) and the concentration of polybrominated diphenyl ethers (PBDEs) was estimated to be 213 mg/kg. These findings demonstrate the potential of the LIBS technique together with multivariate data analysis to ensure WEEE plastic sorting and depollution compliance with current regulations, reducing disposal rates and ultimately contributing to its circularity.

电器和电子设备等消费品中持久性有机污染物(POP)的存在是其使用寿命结束时所含材料回收的主要障碍。目前用于从废旧电子电气设备(WEEE)中回收塑料的技术难以满足回收商对某些持久性有机污染物(主要是溴化阻燃剂(BFR)含量)的限制要求。本研究采用激光诱导击穿光谱(LIBS)技术结合偏最小二乘回归(PLSR)技术,根据总溴(Br)含量对WEEE塑料进行实时分类,以促进其作为二次原料重新进入市场。为此,我们训练了一种分类方法,并在分类原型中测试了一种分类方法,该分类方法使用了平均含Br 1.34%的电视机和计算机显示器外壳混合塑料样品。无论聚合物的颜色和类型如何,高达56%的测试材料可以被分离成最终Br浓度为1,280 mg/kg的单个馏分。所达到的值符合CENELEC EN 50625系列标准中关于溴化阻燃剂(Br)去污染的要求(2000 mg/kg),多溴联苯醚(PBDEs)的浓度估计为213 mg/kg。这些发现证明了LIBS技术与多元数据分析相结合的潜力,可以确保报废电子电气设备的塑料分类和去污染符合现行法规,降低处理率,并最终促进其循环。
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引用次数: 0
Imine-containing Self-healing Waterborne Polyurethane Elastomeric Coating Derived from Bio-based Polyester Polyol 由生物基聚酯多元醇衍生的含亚胺自修复水性聚氨酯弹性体涂料
IF 4.7 3区 工程技术 Q2 ENGINEERING, ENVIRONMENTAL Pub Date : 2024-10-21 DOI: 10.1007/s10924-024-03435-x
Ismail Omrani, Morteza Safarzadeh Zarjani, Reza Mohammadi Berenjegani, Mohammad Reza Nabid

The development of sustainable polyurethane (PU) materials is crucial for minimizing the environmental impact of conventional solvent-based PUs. This study presents a novel approach to synthesizing and characterizing an imine-containing self-healing waterborne polyurethane (WPU) coating derived from bio-based polyester polyol. The process involves the synthesis of an imine-containing diol (IM-diol) from terephthalaldehyde and ethanolamine, followed by the creation of a series of bio-based dynamic bond-containing WPU using bio-based polyester polyol, IM-diol, isophorone diisocyanate (IPDI), and other additives. The imine dynamic bonds within the WPU exhibit excellent self-healing, reprocessability, and degradability. The mechanical and thermal properties of the synthesized bio-based WPU materials were characterized. Dynamic light scattering (DLS) results showed excellent stability in the prepared imine-containing WPU particles. Scratched WPUs exhibited practical self-healing ability at 80 °C after 30 min. The reprocessed imine-containing WPU grains fully recovered their mechanical properties (healing efficiency of 95%) for the first time. Thermogravimetric analysis (TGA) revealed that the thermal decomposition temperature of the synthesized imine-containing WPU exceeds 230 °C, indicating high thermal stability and potential for high-temperature applications. This study provides a promising method to produce a bio-based WPU elastomer with robust self-healing subjected to a dynamic exchange reaction under mild conditions. The findings suggest promising applications for bio-based WPUs in various fields, including coatings and adhesives, highlighting their potential for sustainable solutions in industries that require robust performance. The outstanding properties of the synthesized materials inspire confidence in their potential for various applications and the exploration of new uses that meet both performance and sustainability criteria.

Graphical Abstract

可持续聚氨酯(PU)材料的发展对于最大限度地减少传统溶剂型PU对环境的影响至关重要。本研究提出了一种以生物基聚酯多元醇为原料合成并表征含亚胺自愈水性聚氨酯涂料的新方法。该工艺包括由对苯二甲酸乙二醛和乙醇胺合成含亚胺二醇(IM-diol),然后使用生物基聚酯多元醇、IM-diol、异佛尔酮二异氰酸酯(IPDI)和其他添加剂制备一系列生物基动态含键WPU。WPU内的亚胺动态键表现出优异的自愈性、可再加工性和可降解性。对合成的生物基WPU材料的力学性能和热性能进行了表征。动态光散射(DLS)结果表明,制备的含亚胺WPU颗粒具有良好的稳定性。经刮痕处理的WPU在80℃下处理30 min后表现出实际的自愈能力。经再加工的含亚胺的WPU颗粒首次完全恢复了其力学性能(自愈率为95%)。热重分析(TGA)表明,合成的含亚胺WPU热分解温度超过230℃,具有较高的热稳定性和高温应用潜力。该研究为在温和条件下进行动态交换反应,制备具有强大自愈能力的生物基WPU弹性体提供了一种有前途的方法。研究结果表明,生物基wpu在包括涂料和粘合剂在内的各个领域都有很好的应用前景,突出了它们在需要强大性能的行业中作为可持续解决方案的潜力。合成材料的卓越性能激发了人们对其各种应用潜力的信心,并探索了满足性能和可持续性标准的新用途。图形抽象
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引用次数: 0
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Journal of Polymers and the Environment
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