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Fluorescent Poly(vinyl alcohol) Films Containing Chlorogenic Acid Carbon Nanodots for Food Monitoring (vol 3, pg 7611, 2020)

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ACS APPLIED NANO materialS 2020年第11期3卷 11658-11658页

作者： Zhang, Xinyue Wang, Hui Niu, Na Chen, Zhijun Li, Shujun Liu, Shou-Xin Li, Jian Key Laboratory of Bio-based Material Science & Technology Ministry of Education Northeast Forestry University Harbin 150040 P. R. China Key Laboratory of Wood Science and Technology Zhejiang Agriculture and Forestry University Wusu Road 666 Hangzhou 311300 P. R. China

Functional materials that can sense food quality, detect additives, and lengthen storage times have huge potential in the food industry. Such materials, however, typically require toxic raw materials and complicated syntheses. Here, chlorogenic acid was used to fabricate photoluminescent carbon dots in an environmentally friendly and economical method. Transmission electron microscopy, Fourier transform infrared, and X-ray photoelectron spectroscopy showed a conjugated structure containing phenolic hydroxyl moieties. The carbon dots were doped into poly(vinyl alcohol) (PVA) to produce a functional film with good physical and mechanical performances. The optical properties of the film were characterized by UV–vis and photoluminescence spectroscopy. The fluorescence of the film was found to be sensitive to both the pH and Al3+ions. Scanning electron microscopy and atomic force microscopy micrographs showed the surface roughness of the fluorescent and PVA films. A solution of carbon dots and the functional film both demonstrated strong antioxidant capacity, and the as-prepared film showed good resistance to photobleaching. The film can be used to limit fruit shelf life, to detect Al3+residues in food, and to sense basic substances, including amines produced during spoilage. The film is a potential promising intelligent food-packaging material that can both extend the shelf life of foods and sense additives or contaminants.

关键词： Chlorogenic acid Carbon nanomaterials Quantum dots Fluorescence Food

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Enhancing the mechanical and barrier properties of starch-based green packaging films via acetalization reaction and hydrogen bond dual crosslinking

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Carbohydrate Polymers 2025年 364卷 123787页

作者： Wang, Bin Wang, Xuezhou Ma, Hongxia Li, Jinpeng Cao, Daxian Xu, Jun Zeng, Jinsong Gao, Wenhua Chen, Kefu Plant Fiber Material Science Research Center State Key Laboratory of Advanced Papermaking and Paper-based Materials School of Light Industry and Engineering South China University of Technology Guangzhou510640 China Guangdong Academy of Forestry Guangdong Guangzhou510520 China

As an abundant, eco-friendly bio-material, starch has great potential to address pollution from petroleum-based plastic films, but starch-based films still need improved mechanical and barrier properties for practical use. Therefore, this study proposes an oxidation-dual crosslinking strategy. Native cassava starch (CS) was initially oxidized using NaIO4 to produce dialdehyde starch (DAS). Subsequently, polyvinyl alcohol (PVA) and cellulose nanofibrils (CNF) were incorporated into the DAS matrix, forming a compact-structured DAS composite film, through a dual crosslinking network involving acetalization reactions and intermolecular hydrogen bonding. Compared with the CS film, the optimized DAS-6c-12p composite film (with 6 % CNF and 12 % PVA based on the dry weight of DAS) demonstrated significant improvements in mechanical and barrier properties: tensile strength increased from 15.28 ± 1.11 MPa to 65.67 ± 2.50 MPa, tensile strain rose from 4.67 ± 0.68 % to 6.21 ± 0.13 %, water vapor permeability coefficient decreased from 11.50 ± 0.60 to 3.04 ± 0.19 g·mm/(m2·d), oxygen permeability coefficient reduced from 10.322 ± 0.303 to 0.097 ± 0.003 cm3·mm/(m2·d·0.1 MPa), and edible oil permeability coefficient declined from 4.80 ± 0.14 to 0.50 ± 0.02 g·mm/(m2·d). Notably, compared to the polyethylene packaging film, this composite film exhibited superior fruit preservation capability and biodegradability. This work provides a novel strategy for developing biobased high strength barrier film. © 2025 Elsevier Ltd

关键词： Nanocomposite films

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Gypsum Composites Reinforced by Hemp Fibers Via Enhanced Interfacial Compatibility

SSRN

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SSRN 2023年

作者： Sun, Yanjun Chen, Qin Zhang, Xiao Ma, Yangbao Wu, Yihang Guo, Zixu Tan, Haiyan Bai, Long Huan, Siqi Gu, Jiyou College of Material Science & Engineering Northeast Forestry University Harbin150040 China Academy of Art Northeast Agricultural University Harbin150040 China Northeast Forestry University China College of Materials Engineering Henan University of Engineering Zhengzhou450000 China Key Laboratory of Bio-based Material Science & Technology China

Natural fibers have gained attraction as a means to enhance the mechanical properties of gypsum. This study examines the effects of untreated, modified, and dual-modified hemp fibers on the gypsum/fiber composites. The changes in the fibers and composites are characterized by SEM, ATR-FTIR, XRD, mechanical strength, initial and final setting time. The results demonstrate that the combination of alkali and PEO treatment enables the most evenly dispersion of fibers. Compared with pure gypsum, the elastic modulus and bending strength of the composites increase by 56% and 42%, respectively. Additionally, hydration process reveals that PEO helps to form denser composite structures. © 2023, The Authors. All rights reserved.

关键词： Gypsum

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Engineering chiral mesoporous silica nanoparticles: Template design and structural control for advanced applications

Supramolecular Materials

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Supramolecular materials 2025年 4卷

作者： Yin, Yu Wei, Wu Zhang, Kai Sustainable Materials and Chemistry Department of Wood Technology and Wood-based Composites University of Göttingen Göttingen 37077 Germany Biotechnology Center (Biotechnikum) University of Göttingen Göttingen 37077 Germany Key Laboratory of Bio-based Material Science & Technology Ministry of Education Northeast Forestry University Heilongjiang Harbin 150040 China

Chiral mesoporous silica nanoparticles (CMSNs) are a distinct subset of mesoporous silica nanoparticles, combining the favorable physicochemical properties of MSNs with unique chiral architectures at both molecular and macroscopic scales. These helical structures endow CMSNs with specialized functionalities, enabling their applications in chiral catalysis, enantioselective recognition, chiral separation, drug delivery, and optical devices, making them a focal point in materials and biomedical research. Significant progress has been achieved in the synthesis of CMSNs, particularly in understanding the mechanisms of chirality formation and the critical role of surfactant templates in guiding chiral structures. This review summarizes these advancements, emphasizing experimental and theoretical insights. key applications of CMSNs, especially in drug delivery systems, are explored in detail, highlighting their potential to enhance bioavailability and therapeutic efficacy. Looking ahead, CMSN research presents exciting opportunities, including precise control over chiral structures, the development of novel templating strategies, and the exploration of broader applications. These advancements are expected to drive progress in nanoporous silica technologies and open new frontiers in materials science and nanomedicine. © 2025

关键词： Chiral mesoporous silica nanoparticles (CMSNS) Chirality formation Drug delivery systems Helical structures Surfactant templates

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Safe and economical preparation of amino acid-derived bio-based triazine char-forming agent for efficient intumescent flame retardant polypropylene

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Construction and Building materials 2025年 484卷

作者： Xu, Yue Hu, Haojie Tao, Bin Yin, Ru Liu, Lubin Li, Bin Heilongjiang Key Laboratory of Molecular Design and Preparation of Flame Retarded Materials College of Chemistry Chemical Engineering and Resource Utilization Northeast Forestry University Harbin150040 China Key Laboratory of Bio-based Material Science and Technology Ministry of Education Northeast Forestry University Harbin150040 China National and Local Joint Engineering Laboratory for Ecological Utilization of Biological Resources Northeast Forestry University Harbin150040 China

Triazine intumescent flame retardant (IFR) PP composites have been widely used in electronic appliances, rail transit, and aerospace fields due to their low smoke, high efficiency and environmental friendliness. However, with the increasing attention to safe production and sustainable development, the green and safe synthesis and biomaterialization of traditional triazine char-forming agents have received extensive attention. Herein, a bio-based triazine char-forming agent N-propionyltriazine-ethylenediamine copolymer (PTEC) was successfully prepared by bio-based β-alanine and cyanuric chloride as raw materials under a pure water system for the first time. A novel bio-based IFR (BIFR) system was constructed with ammonium polyphosphate. Only 24 wt% BIFR make PP pass the UL-94 V-0 rating, and the LOI of PP/BIFR was improved to 29.7 %. Compared to pure PP, the smoke and heat release rate of PP/BIFR composites were decreased by 54.5 % and 76.2 %, respectively. The introduction of BIFR promoted the dehydration and charring of PP composites, and released many inert gases during pyrolysis, which led to the rapid expansion of composites. The formed dense and high-strength char layer exerted excellent shielding effect in the condensed phase. In addition, the PP/BIFR composites retained excellent mechanical properties, and the flexural strength and ductility were significantly improved with the addition of BIFR. This study provided a new way for the safe production and biomaterialization of triazine char-forming agents, and the prepared bio-based PP composites with excellent flame retardancy and mechanical properties showed a great application prospect in construction, building materials and other emerging fields. © 2025 Elsevier Ltd

关键词： Bending strength

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Fabrication of Thermoplastic Poly(ether-ester) Elastomers with High Melting Temperature and Elasticity from bio-based 2,5-Furandicarboxylic Acid

ACS Sustainable Resource Management

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ACS Sustainable Resource Management 2024年第7期1卷 1520-1533页

作者： Tao Yang Fei Liu Ruixue Gao Xiaoqin Zhang Jiaxi Li Jinggang Wang Jin Zhu Key Laboratory of Bio-based Polymeric Materials Technology and Application of Zhejiang Province Ningbo Institute of Materials Technology and Engineering Chinese Academy of Sciences 1219 Zhongguan West Road Zhenhai Ningbo Zhejiang 315201 China School of Materials Science and Engineering Shenyang University of Chemical Technology Shenyang Liaoning 110142 China

Even though current research on bio-based poly(ester-ether) elastomers (TPEEs) has expanded to include applications, only odd TPEEs with outstanding melting temperatures have been reported thus far. This is due to certain features, like desirable elastic properties and high melting temperature, which are still challenging to obtain without the utilization of petroleum-based monomers. In order to prepare bio-based TPEE with both high thermal resistance and elastic recovery, furan-based poly(1,4-cyclohexanedimethylene furandicarboxylate)-poly(tetramethylene glycol) multiblock copolymers (PCFTMG2k) were synthesized in this work. These copolymers had weight fractions of soft segments PTMG (ωPTMG) ranging from 30 to 80% while maintainingMnof the soft segments at 2 kg/mol. Indeed, while PTMG segments are found to delay substantially the crystallization of the PCF within the copolymers, the results show that TPEEs with both elastic properties and high melting temperatures can be successfully prepared by introducing soft segments with relatively good crystallization ability and controlling the content of soft segments. Moreover, the crystallization behavior of the copolymers was investigated, from which it was found that the copolymers transformed from a non-cocrystallization state to an isodimorphic state as the content of soft segments increased. More importantly, PCFTMG2k-80, containing 80 wt % of the PTMG segment, showed a shape recovery rate as high as 84.9% during the first cyclic test at 200% strain andTmup to 198°C at a high PTMG concentration, which is higher than those of almost all the TPA-based TPEEs. This PCFTMG2kbio-based TPEE will occupy an important position in the future market of high melting temperature thermoplastic elastomers.

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Rational construction and triethylamine sensing performance of foam shapedα-MoO_(3)@SnS_(2) nanosheets

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Chinese Chemical Letters 2022年第1期33卷 567-572页

作者： Xianhui Dong Qing Han Yaru Kang Haidong Li Xinyu Huang Zhengtao Fang Huimin Yuan Ahmed A.Elzatahry Zongtao Chi Guanglei Wu Wanfeng Xie School of Material Science&Engineering Institute of Materials for Energy and EnvironmentState Key Laboratory of Bio-Fibers and Eco-TextilesQingdao UniversityQingdao 266071China School of Electronics and Information Qingdao UniversityQingdao 266071China College of Physics and Electronic Engineering Qilu Normal UniversityJi'nan 250200China Materials Science and Technology Program College of Arts and SciencesQatar UniversityPO Box 2713DohaQatar

Owing to their high surface area,stable structure and easy fabrication,composite nanomaterials with encapsulation structures have attracted considerable research interest as sensing materials to detect volatile organic ***,a hydrothermal route is designed to prepare foam shapedα-MoO_(3)@SnS_(2)nanosheets that exhibit excellent sensing performance for triethylamine(TEA).The developed sensor,based onα-MoO_(3)@SnS_(2)nanosheets,displays a high response of 114.9 for 100 ppm TEA at a low working temperature of 175℃with sensitivity higher than many other reported *** addition,the device shows a wide concentration detection range(from 500 ppb to 500 ppm),good stability after exposure to air for 80 days,and excellent *** superior sensing characteristics of the developed sensor are attributed to the high crystallinity ofα-MoO_(3)/SnS_(2),excessive and accessible active sites provided by the good permeability of porous SnS_(2)shells,and the excellent conductivity of the encapsulation heterojunction ***,the foam shapedα-MoO_(3)@SnS_(2)nanosheets presented herein have promising practical applications in TEA gas sensing devices.

关键词： MoO_(3) SnS_(2) Encapsulation heterojunction Triethylamine Sensing performance

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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 2023年

作者： Yang, Ziyi Li, Yudong Liu, Dan Song, Maosen Gao, Yang Yang, Bin Han, Enshan He, Yanzhen Yang, Xiaohui School of Chemical Engineering Hebei University of Technology Tianjin300400 China Key Laboratory of Bio-based Material Science and 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 [[EQUATION]]-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. © 2023, The Authors. All rights reserved.

关键词： Electrocatalysis

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Kinetic Analysis and Reaction Mechanism of Pa4 Thermal Degradation: Thermal Stability with Respect to Crystallinity

SSRN

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SSRN 2024年

作者： Wang, Mingda Zhang, Yajing Zhan, Fangke Qiu, Yongjun Chen, Tao Zhao, Liming State Key Laboratory of Bioreactor Engineering School of Biotechnology East China University of Science and Technology Shanghai200237 China Key Laboratory of Bio-based Materials Engineering China National Light Industry Council Shanghai200237 China Shanghai200237 China Shanghai Key Laboratory of Advanced Polymeric Materials School of Materials Science and Engineering East China University of Science and Technology Shanghai200237 China

Polyamide 4 (PA4) has garnered considerable attention due to its fully bio-based origin and biodegradability as a high-performance polyamide. Nevertheless, thermal degradation during the melting process impedes thermal processing, thereby constraining its potential for engineering plastics applications. To clarify the thermal degradation reactions of PA4 amidst intricate physical and chemical transformations, establishing a theoretical foundation for the thermal stability modification, we conducted a comprehensive analysis of PA4 thermal degradation coupled with crystallization, considering kinetics and reaction mechanisms. Calculation of reaction activation energies and mechanism functions revealed that PA4 pyrolysis is a two-stage compound process, with distinct degradation mechanisms attributed to the crystalline and amorphous regions. Additionally, the thermal degradation mechanism of the PA4-CaCl2 composite system at varying crystallinity levels was illustrated. The incorporation of Ca strengthens intermolecular forces in the samples, leading to an increased overall stability. Simultaneously, a notable alteration in the reaction mechanism was observed in the crystalline zone lacking the Ca phase. © 2024, The Authors. All rights reserved.

关键词： Crystallinity

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Self-recoverable elastico mechanoluminescence of a hybrid metal halide crystal

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National science Review 2025年第5期 15-21页

作者： Tian-Yi Yang Si-Nuo Li Hai-Sheng Chen Zi-Ying Li Zhi-Gang Li Rui Feng Fei-Fei Gao Ying Zhang Yi-Ming Liu Yang Zhang Wei-Wei Liu Wei Li Xian-He Bu School of Materials Science and Engineering & Tianjin Key Laboratory of Metal and Molecule-Based Material Chemistry Nankai University Institute of Modern Optics & Tianjin Key Laboratory of Micro-Scale Optical Information Science and Technology Nankai University

materials exhibiting self-recoverable elastico mechanoluminescence（EML） are highly sought after due to their utility in sensing and information ***,the current pool of identified EML materials remains limited,exclusively comprising purely inorganic *** study delves into the investigation of the EML properties of a zero-dimensional（0D） organic-inorganic metal halide denoted as[C19H18P]2MnBr4(where C19H18P+signifies methyl triphenyl phosphonium).Notably,[C19H18P]2MnBr4manifests two distinct polymorphs,with the piezoelectric and non-piezoelectric polymorphs exhibiting thermodynamic and kinetic stability,*** both compounds showing bright greenish luminescence,only the piezoelectric phase exhibits desirable EML *** EML in this context is distinguished by its high intensity,strong fatigue resistance and prompt *** underlying me chanism of EML in the piezo electric polymorph can be explained by the piezoelectric effect and the stress-induced energy band *** and piezoelectric experiments reveal the self-recoverable EML arises from the relaxation of the stress-induced kinetically stable non-piezoelectric to the thermo dynamically favored piezoelectric *** work paves a new pathway in the exploration of self-recoverable EML materials in the realm of hybrid organic-inorganic crystals.

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