INDUSTRIAL CROPS AND PRODUCTS
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2024
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IF 5.6
Zhichen Ba,Feihan Yu,Haobo Fan,Wenxuan Wang,Yonggui Wang,Daxin Liang,Zefang Xiao,Haigang Wang,Yanjun Xie
Thermal energy storage wood has been rapidly developed as a green and renewable energy-saving building material. In this study, bio-based Schiff bases (VF) were prepared from vanillin and furfurylamine via aldehyde–amine condensation and used as a small molecule fixative. Subsequently, VF and dodecylamine were mixed uniformly and impregnated into rubberwood under pressure, affording thermal energy storage wood (TESW-x%VF). The results revealed that TESW-x%VF exhibited adjustable enthalpy (41.67–88.23 J g −1 ) and room-temperature phase transition (25°C–27°C). Moreover, the addition of VF improved the antileakage performance of TESW. According to density functional theory calculations, this is because the adsorption energy between VF and dodecylamine molecules has increased by 3–8 times compared to dodecylamine molecules. The above results provide a solution for the leakage issue associated with organic phase-change materials and aid in the future development of energy-saving wood building materials, which also improves the high-value utilization of chemical components in agricultural and forestry crops.
研究领域:
材料科学
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能源工程
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林业科学
✓ 已验证
产品关联
DOI
高影响因子
Journal of Energy Storage
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2025
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IF 9.8
Shasha Wang,Guangyi Zhang,Ying Zhang
This study addresses the flammability issue of paraffin-based phase change materials (PCMs) and the limitations of most additive flame retardants that fail to exhibit effective flame-retardant properties. Based on the phase change mechanism and chemical structure of paraffin-based PCMs, a novel “composition-structure-function integration” design concept for intrinsic flame-retardant PCM (VOD) is proposed. The synthesized VOD integrates phase change groups with “acid source, carbon source, and gas source.” The phase-change energy-storage performance, thermal stability, and flame-retardant properties of VOD were investigated. The melting enthalpy and crystallization enthalpy of VOD are 59.4 J/g and − 59.2 J/g, respectively. The thermal stability of VOD is significantly superior to that of octadecylamine (ODA), with residual char content reaching 17.1 wt% and 19.6 wt% under nitrogen and air atmospheres, respectively. VOD exhibits remarkable flame-retardant behavior, achieving self-extinguishing within 30 s of ignition. Compared to ODA, its peak heat release rate decreases by 69.9 %. The gaseous pyrolysis products of VOD are analyzed using thermogravimetric-infrared spectroscopy and pyrolysis-gas chromatography–mass spectrometry. Combined with the analysis results of the char layer, the flame-retardant mechanism of VOD is elucidated. This work opens a new research direction for the synthesis of biomass-based PCMs and provides a theoretical foundation and solutions for the scientific design of intrinsic flame-retardant PCM molecular structures.
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
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
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2024
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IF 7.7
Chang Wu,Zong-Xing Wu,Shu-Jin Long,Xi Luo,Xian-Wei Cheng,Jin-Ping Guan
The development of sustainable and durable flame-retardant protein silk fabric without compromising its physical properties is of interest but challenging. In this study, a fully biobased reactive flame-retardant, vanillin phytate, was synthesized from biomass phytic acid and vanillin. Subsequently, vanillin phytate was covalently grafted onto silk fabrics along with diethyl phosphite under mild conditions via the Kabachnik–Fields reaction. The chemical structure of vanillin phytate and its potential cross-linking mechanism with silk fibers, thermal stability, combustion behavior, flame retardancy, washing durability, and mode of action of the modified silk fabrics were investigated. The modified silk exhibited a significant reduction in heat and smoke release by 63.8 % and 90 %, respectively, versus pristine silk. The modified silk fabrics also demonstrated excellent self-extinguishing capacity, with a reduced damaged length of 7.0 cm and an increased limiting oxygen index of over 34 %. Furthermore, the modified silk fabric maintained self-extinguishing performance after 25 washing cycles, showing high flame-retardant efficiency and good washing durability. The char residue analyses revealed that the modification primarily exerted its flame-retardant effect in the condensed phase. Interestingly, the present strategy had less influence on the physical performance of silk fabrics, indicating a wide range of practical applications.
研究领域:
材料科学
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生物化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ACS Applied Polymer Materials
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2025
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IF 4.7
Shang Ke Yang,Yan Xiao Mu,De Li,Tong Li,Hai Lan Lin,Ai Ping Zhang,Jun Bian,Dai Qiang Chen,Ke Cheng Yang
Developing biobased thermoplastic polyurethane (TPU) from renewable biomass resources is becoming urgent due to resource scarcity and environmental protection requirements. Herein, a chain extender diol (VAN–OH) containing dynamic imine bonds was synthesized using renewable biomass resource vanillin (VAN), then combined with 1,4-butanediol (BDO) in various proportions, and reacted with poly(caprolactone diol) and 4,4′-diphenylmethane diisocyanate to synthesize degradable biobased TPU (BTPUs) with excellent performance. Fourier transform infrared, 1H NMR, X-ray diffraction, DMA, thermogravimetric analysis, molecular weight, chemical degradation, and mechanical tests systematically investigated the relationships between the polymer chain structure and the performance of BTPUs. The experimental results demonstrated that the high regularity and strong polar bonds (imine and ether) of VAN–OH enhanced the interactions between macromolecular chains and improved the hydrogen bonding combination, crystallinity, and phase separation of BTPUs, thereby exerting significant contributions to their thermomechanical and degradable properties. BVTPU1 with a mole ratio of BDO/VAN–OH = 7.5:2.5 exhibited the best mechanical performance, degradation time was 37.5% shorter, and initial pyrolysis temperature increased by 13.8% compared to BTPU0 without VAN–OH. In addition, BTPUs have shown some biodegradability and environmental friendliness in soil burial experiments under natural conditions.
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
Journal of Materials Chemistry C
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2024
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IF 5.7
GuoMing Yuan,Hui Yang,Zhijun Liu,Yuemiao Zhang,Yanhan Tao,Bo Yang,Kun Wu,Jun Shi,Li Yang
To meet the needs of the contemporary microelectronics industry and sustainability strategies, a series of organosilicon polyimide resins (V-Si@PI-x) have been prepared by aldehyde-amine condensation reaction using vanillin as a renewable bio-based feedstock. The aldehyde-amine condensation reaction cleverly avoided highly polar amino groups and introduced fluorine-containing groups simultaneouly. So, the series V-Si@PI-x as a whole exhibited low dielectric constant (<3.1) and dielectric loss (<0.01), with V-Si@PI-5 had dielectric constant as low as 2.33 and dielectric loss as low as 0.003. The three-dimensional network in the series V-Si@PI-x featured a high density (>3800 mol/m3) of imine bonds as cross-linking points, which allowed rapid polymer network rearrangement under external pressure and heat, resulting in a reprocessing process in 8 min. In a weak acidic environment, the degradation of the series V-Si@PI-x was accomplished within 5 min, leveraging the solubility difference to effectively recover the V-D4 monomer. The series V-Si@PI-x exhibited mechanical properties superior to those of conventional silicone resins (tensile strength around 5 MPa), with tensile strength and modulus exceeding 8.4 MPa and 1 GPa, respectively. In addition, the high hydrophobicity (WCA over 110°) and low water absorption (0.35-0.96%) favored the practical application of the series V-Si@PI-x in the microelectronics industry.
研究领域:
材料科学
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可持续发展
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微电子技术
✓ 已验证
产品关联
DOI
高影响因子
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