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Study on the Improvement of Foaming Properties of PBAT/PLA Composites by the Collaboration of Nano-Fe_(3)O_(4) Carbon Nanotubes

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Journal of Renewable materials 2025年第4期13卷 669-685页

作者： Jiahao Liu Xinyu Zhang Huiwei Wang Yupeng Li Shan Jin Guanxian Qiu Ce Sun Haiyan Tan Yanhua Zhang Key Laboratory of Bio-Based Material Science&Technology Northeast Forestry UniversityMinistry of EducationHarbin150040China Northeast Forestry University Engineering Consulting and Design Research Institute Co. Ltd.Harbin150040China

In recent years,degradable materials to replace petroleum-based materials in preparing high-performance foams have received much research *** polymer foaming mostly uses supercritical fluids,especially carbon dioxide(Sc-CO_(2)).The main reason is that the foams obtained by Sc-CO_(2) foaming have excellent performance,and the foaming agent is green and *** current research,Poly(butylene adipate-co-terephthalate)(PBAT),poly(lactic acid)(PLA),and other degradable polymers are generally used as the main foaming materials,but the foaming performance of these degradable polyesters is poor and requires *** this work,10%PLA was added to PBAT to enhance the melt strength and improve the foaming *** improve the foaming properties of the PBAT/PLA composites,two kinds of nano-filler(nano-Fe_(3)O_(4) and carbon nanotubes(CNTs))were innovatively introduced for foaming *** was a synergistic effect between the two nano-fillers to enhance the foaming properties *** 6 wt%CNTs and 4 wt%nano-Fe_(3)O_(4) were added,the 4Fe_(3)O_(4)/6CNT foam had the best comprehensive *** foaming rate reached 14.8 times,which was 2.8 and 2.1 times that after adding 10 wt%CNTs or 10 wt%nano-Fe_(3)O_(4) *** combined action could adjust the melt elasticity of different PBAT/PLA composites to the *** nanofillers also served as skeleton structures to support the foam cells,significantly improving the foaming *** density and foaming ratio did not change significantly at 14 days after *** compressive strength of the composite foam reached up to 0.27 MPa and the water contact angle reached 120.1°.The synergistic foaming effect of nano-Fe_(3)O_(4) and CNTs could significantly improve the Sc-CO_(2) foaming performances of the composites,providing a new method for degradable materials to replace petroleum-based materials.

关键词： Poly(lactic acid) poly(butylene adipate-co-terephthalate) supercritical carbon dioxide

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Decorative Wood Fiber/High-Density Polyethylene Composite with Canvas or Polyester Fabric

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Journal of Renewable materials 2020年第8期8卷 879-890页

作者： Jialin Lv Rao Fu Yinan Liu Xuelian Zhou Weihong Wang Pengbo Xie Tingwei Hu Key Lab of Bio-Based Material Science&Technology of EducationMinistry Northeast Forestry UniversityHarbin150040China Taizhou University Taizhou318000China

Wood-plastic composite is an environmentally friendly material,due to its use of recycled thermoplastics and plant ***,its surface lacks attractive aesthetic *** this paper,a method of decorating wood fiber/high-density polyethylene(WF/HDPE)without adding adhesive was *** or polyester fabrics were selected as the surface decoration *** influence of hot-pressing temperature and WF/HDPE ratio on the adhesion was *** surface bonding strength,water resistance,and surface color were evaluated,and observation within the infrared spectrum and under scanning electron microscopy was used to analyze the bonding *** results showed that the fabric and WF/HDPE substrate could be closely laminated together depending on the HDPE layer accumulated on the WF/HDPE *** molten HDPE matrix penetrates canvas more easily than polyester fabric,and the canvasveneered composite shows a greater bonding strength than does the polyester fabric-veneered composite.A higher proportion of the thermoplastic component in the substrate improved the *** the hot-pressing temperature exceeded 160°C,the fabric-veneered WF/HDPE panels had greater water resistance,although the canvas fabric changed more obviously in terms of fiber shape and color,compared with the polyester *** the canvas fabric,140°C–160°C was a suitable hot-pressing temperature,whereas 160°C–180°C was more suitable for polyester *** proportion of the thermoplastic component in the composite should be not less than 30%to achieve adequate bonding strength.

关键词： wood-plastic composites high-density polyethylene polyester fiber canvas surface decoration

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Self-healing Polymeric Hydrogels:Toward Multifunctional Soft Smart materials

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Chinese Journal of Polymer science 2021年第10期39卷 1262-1280,I0006页

作者： Xiao-Ling Zuo Shao-Fan Wang Xiao-Xia Le Wei Lu Tao Chen College of Materials Science and Engineering Guizhou Minzu UniversityGuiyang 550025China Key Laboratory of Bio-Based Polymeric Materials Technology and Application of Zhejiang Province Ningbo Institute of Material Technology and EngineeringChinese Academy of SciencesNingbo 315201China School of Chemical Sciences University of Chinese Academy of SciencesBeijing 100049China

The concept of self-healing that involves a built-in ability to heal in response to damage wherever and whenever it occurs in a material,analogous to the healing process in living organisms,has emerged a couple of decades *** primarily by the demands for life-like materials and soft smart materials,therefore,the development of self-healing polymeric hydrogels has continually attracted the attention of the scientific ***,this review is intended to give an in-depth overview of the state-of-the-art advances in the field of self-healing polymeric ***,recently emerging trends in self-healing polymeric hydrogels are summarized,and notably,recommendations to endow these hydrogels with fascinating multi-functionalities including luminescence,conductivity/magnetism and shape memory etc are *** close,the current challenges and future opportunities in this field are also discussed.

关键词： Polymeric hydrogels Self-healing Multi-functionalities Smart materials

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Ultra-Small Carbon Dots Accelerate Extracellular Electron Transfer to Boost bioelectricity Generation

SSRN

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SSRN 2023年

作者： Guo, Xinqi Yang, Chenhui Wu, Jiaqi Wang, Ruiwen Liu, Shouxin Li, Jian Chen, Zhijun Li, Shujun Engineering Research Center of Advanced Wooden Materials and Key Laboratory of Bio-based Material Science & Technology Northeast Forestry University Ministry of Education Harbin150040 China

Carbon dots (CDs)-promoted bioelectrochemical systems have shown promise for green power generation and waste water purification. However, most available CDs have the potential for toxicity and their size is not well-suited to bioelectrochemical systems. Here, ultra-small, biomass-based N-doped CDs were synthesized by a facile hydrothermal method using only the fresh leaves of Hydrocotyle vulgaris (also known as marsh pennywort). The CDs had an average diameter of only ~1.3 nm, were readily taken up by bacterial cells and showed good biocompatibility. The binding of the CDs with intracellular components of Shewanella oneidensis MR-1 markedly enhanced the electron transport channel within the cells, thus accelerating extracellular electron transfer (EET). The CDs boosted the metabolism of Shewanella oneidensis MR-1, as well as increasing bioelectricity generation by the bacteria. The current, voltage and power output of biocells constructed using CD-modified bacteria increased by ~12.2-, 3.0- and 14.1-fold compared with biocells constructed using unmodified bacteria. This work provides a feasible route to biomass-based CDs that can accelerate EET and thus boost bioenergy production. © 2023, The Authors. All rights reserved.

关键词： biomass

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AgAuSe quantum dots with absolute photoluminescence quantum yield of 87.2%:The effect of capping ligand chain length

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Nano Research 2022年第9期15卷 8555-8563页

作者： Ziqiang Sun Cheng Liu Hongchao Yang Xiaohu Yang Yejun Zhang Hongzhen Lin Youyong Li Qiangbin Wang School of Nano-Tech and Nano-Bionics University of Science and Technology of ChinaHefei 230026China CAS Key Laboratory of Nano-Bio Interface Division of Nanobiomedicine and i-LabSuzhou Institute of Nano-Tech and Nano-BionicsChinese Academy of SciencesSuzhou 215123China Institute of Functional Nano&Soft Materials(FUNSOM) Jiangsu Key Laboratory for Carbon-Based Functional Materials&DevicesSoochow UniversitySuzhou 215123China

Surface ligands of colloidal quantum dots(QDs)have a profound influence on their surface states,which has been verified in the studies of the effect of ligand head groups on the photoluminescence(PL)properties of ***,the investigation of the ligand chain length is ***,we systematically explored the effect of chain length on the Ag_(2)Se QDs by selecting three ligands,1-octanethiol(OTT),1-dodecanethiol(DDT),and 1-hexadecanethiol(HDT),with diverse chain *** found that the PL intensity of Ag_(2)Se QDs increased with the decrease of the ligand chain length due to the enhanced passivation of surface defects emerging from the robust QD-ligand interface binding affinity and the weaker hydrophobic chain–chain ***,AgAuSe QDs terminated with OTT were obtained by alloying parent OTT-Ag_(2)Se QDs with Au precursor with a record absolute PL quantum yield(PLQY)of 87.2%at 970 nm,facilitating ultrasensitive in vivo angiography imaging in a nude mouse *** expect that our finding of the important role of the ligand chain length on the optical properties of QDs will be suggestive to the design and synthesis of high-quality QDs,and also look forward to the clinical applications of the ultra-bright AgAuSe QDs.

关键词： quantum dots surface ligand ligand chain length photoluminescence quantum yield bioimaging

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Anti-Ultraviolet, Co2 Permeability and Photothermal Properties of Porous Pva-G-Alkali Lignin-based Coumarin Composite Membranes

SSRN

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SSRN 2024年

作者： Shi, Ying Mu, Haohao Wang, Qian Wang, Juan Liu, Yuan Yuan Ren, Shixue Song, Yongming Ma, Yanli Li, Shujun Key Laboratory of Bio-based Material Science & Technology Northeast Forestry University Ministry of Education Heilongjiang Harbin150040 China Engineering Research Center of Advanced Wooden Materials Ministry of Education Heilongjiang Harbin150040 China

Polyvinyl alcohol (PVA) is widely used in food packaging, drug release materials, and crop growth applications but suffers from accelerated aging due to sunlight exposure. Lignin can be used as a filler in polymer membranes to prevent degradation and to block the ultraviolet light that is harmful to crops and plants. However, traditional blending methods result in composite membranes with inferior mechanical properties compared to pure PVA ***, PVA-g-LGC is synthesized with PVA and alkali lignin-grafted 3-acryloyl-7-diethylamino coumarin (LGC). LGC serves as an UV-responsive pore-forming agent, facilitating the radical copolymerization of PVA with LGC. PVA-g-LGC exhibits an ultraviolet transmission value approaching zero within the 200 to 400 nm range. Subsequently, it was discovered that the transmittance of visible light for the PVA-g-LGC membrane surpasses that of a PVA/LGC blending membrane by a significant margin of 155.2%. Furthermore, the CO2 permeable ability of the PVA-g-LGC membrane is astonishingly enhanced by a remarkable factor of 66.44 compared to the PVA membrane. Notably, after 9 min illumination under 1 sunlight, the temperature of the PVA-g-LGC membrane surface escalates to 34.6 °C, surpassing the temperature of the PVA/LGC blending membrane by 1.8 °*** work presents a facile one-step strategy to fabricate a porous PVA-g-LGC composite membrane with UV protection, enhanced CO2 permeability, and photothermal insulation properties. Derived from alkali lignin, this environmentally friendly coating can prevent UV radiation damage to people, animals,and plants and protect indoor and outdoor decorations from discoloration,making it a promising material for sustainable applications. © 2024, The Authors. All rights reserved.

关键词： Carbon dioxide

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A Magnetic Wood with Degradable/Flame-Retardant Properties Obtained by Esterification Modification with Citric Acid

SSRN

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SSRN 2023年

作者： Sun, Xiaoxiao Chen, Lei Zheng, Dingyuan Chen, Yang Yang, Minghui Yao, Wenrui Zhang, Yanhua Key Laboratory of Bio-based Material Science & Technology Northeast Forestry University Ministry of Education Harbin150040 China Hangzhou Hsinchu Cultural Creativity Co. LTD Hanzhou311200 China

Renewable energy has the advantages of environmental protection, sustainability and energy security, and therefore has become the current hotspot for promotion and development worldwide. As a renewable building material, wood offers great possibilities for sustainable urbanization. Here, we explored a new biodegradable wood (3%PFeW) of magnetic and flame-retardant by chemical methods, made of porous wood containing nano-Fe3O4 impregnated with citric acid, 1,8-octanediol and the copolymer flame retardant CEPPA. It has excellent magnetic properties, and has a magnetic saturation strength of up to 1.50 emu/g at 1.38% iron content. It is worth noting that the esterification of the citric acid carboxyl group with the cellulose hydroxyl which makes the 3%PFeW outstanding chemical stability marked by outstanding resistance to moisture absorption. Simultaneously, the existence of CEPPA contributes to the effective flame retardancy of the 3%PFeW. It can be self-extinguished after 10 s of ignition. Given biodegradation, simple operation, good durability, excellent magnetic properties and effective flame retardancy, the wood materials with magnetic and flame-retardant demonstrated here is an attractive induction magnetic and flame retardancy material for application in building and furniture. © 2023, The Authors. All rights reserved.

关键词： Chemical stability

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Constructing Oxygen Vacancy-Regulated Cu/Fe2o3 Nanorod Array Electrodes for Boosting the Electrocatalytic Reduction of Nitrate

SSRN

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SSRN 2024年

作者： Yang, Ziyi Li, Yudong Liu, Dan Song, Maosen Gao, Yang Yang, Bin He, Yanzhen Han, Enshan Yang, Xiaohui School of Chemical Engineering Hebei University of Technology Tianjin300400 China Key Laboratory of Bio-based Material Science & Technology Northeast Forestry University Ministry of Education Heilongjiang Harbin150040 China Chongqing Institute of Green and Intelligent Technology Chinese Academy of Sciences Chongqing400714 China

The adsorption of nitrate is the key to enhancing the electrocatalytic nitrate reduction reaction (NitRR). Constructing oxygen vacancies (OVs) has been an effective strategy that can modulate the local electronic structure and enhance the adsorption of nitrate. However, the existing methods for effectively regulating the concentration of oxygen vacancies are still limited. Herein, based on a detailed understanding of the NitRR mechanism, a typical hydrolysis-coupling redox (HCR) reaction has been designed to prepare unique 3D Cu/Fe2O3 core-shell nanorod array cathodes with controllable oxygen vacancy concentration. The optimal Cu/Fe2O3-13 achieves a high nitrate conversion of 99.10 % and ammonia selectivity of 98.30 % in a 0.2 M Na2SO4 solution with 100 ppm -N at -1.4 V vs. SCE. Furthermore, the Cu/Fe2O3-13 exhibits exceptional stability throughout a 30-hour electrocatalytic process. The outstanding electrochemical performance is attributed to the enhancement mechanism of OVs and a unique nanorod array structure with a high density of surface-exposed OVs and high-throughput transport pathways for ions-aspects. © 2024, The Authors. All rights reserved.

关键词： Electrocatalysis

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Metal-organic frameworks and their derivatives for sustainable flame-retardant polymeric materials

Advanced Nanocomposites

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Advanced Nanocomposites 2025年 2卷 1-14页

作者： Geng Huang Ye-Tang Pan Lubin Liu Pingan Song Rongjie Yang College of Chemistry and Materials Science Hengyang Normal University Hunan 421008 PR China National Engineering Research Center of Flame Retardant Materials School of Materials Science & Engineering Beijing Institute of Technology Beijing 100081 PR China Key Lab of Bio-based Material Science and Technology Ministry of Education Northeast Forestry University Harbin 150040 People’s Republic of China Centre for Future Materials University of Southern Queensland Springfield 4300 Australia School of Agriculture and Environmental Science University of Southern Queensland Springfield 4300 Australia

biomass resources are natural polymeric materials that are abundant, affordable, non-toxic and renewable. Although they find diverse applications in both everyday life and high-tech materials, their use is often constrained by the associated fire hazards. To address this issue, there is a growing interest in the development of flame-retardant biomass polymeric materials. Metal-organic frameworks (MOFs) consist of transition metal species, flame-retardant elements and potential carbon sources, allowing for easy adjustment of their structure and properties. This versatility makes MOFs and their derivatives and hybrids highly attractive for flame retardancy studies. Despite their distinctive properties, MOFs alone may not fully satisfy the demands of commercial flame-retardant applications. The combination of MOFs with biomass materials has been identified as a promising strategy for developing efficient flame-retardant biomass nanocomposites. This innovative approach aims to address the limitations of MOFs by capitalizing on synergistic effects. This review highlights recent advancements and strategies in MOF-based flame retardants incorporating biomass materials, and it elucidates the flame-retardant mechanisms of MOF/biomass nanocomposites to inform future design efforts in the field. Furthermore, the review discusses the current challenges and prospects in this field, aiming to provide a succinct yet comprehensive overview for researchers to quickly grasp the latest developments.

关键词： Sustainable Polymer nanocomposites MOFs Nanomaterials Flame-retarding mechanism

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Citric Acid/Chitosan Adhesive with Viscosity-Controlled for Wood Bonding Through Supramolecular Self-Assembly

SSRN

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SSRN 2023年

作者： Cai, Lijian Chen, Yutong Lu, Zetan Wei, Ming Zhao, Xin Xie, Yanjun Li, Jian Xiao, Shaoliang Key Laboratory of Bio-based Material Science & Technology Ministry of Education Northeast Forestry University Harbin China Engineering Research Center of Advanced Wooden Materials Ministry of Education Northeast Forestry University Harbin China

Developing bio-based sustainable wood adhesives is significant as a substitute for petroleum-derived adhesives. However, the existing bio-based adhesives have disadvantages of complex fabrication, uncontrollable viscosity, and poor water resistance. Herein, we developed a citric acid/chitosan adhesive with viscosity-controlled and water-resistant features by one-step dissolution at room temperature based on the supramolecular self-assembly strategy. Different wood products (plywood, laminated veneer lumber and particleboard) with superior performance were prepared by applying that adhesive on veneer and wood particles (fine particles and rough particles). The adhesion mechanism was mechanical interlocks and cross-linking of citric acid/chitosan in adhesives with those in the cell wall. This work provides high promise for alternatives to traditional unsustainable wood adhesives (urea-formaldehyde, melamine-urea-formaldehyde and phenolic resins) for fabricating different wood products. © 2023, The Authors. All rights reserved.

关键词： Adhesives

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