Journal of Energy Storage
·
2022
·
IF 8.907
Dongguang Yan,Shilong Zhao,Chi Ge,Jianzhou Gao,Chengyu Gu,Yingqiang Fan
The complicated preparation process and difficulty of recycling were serious obstacles to the widespread use of solid-solid phase change materials (PCMs). Herein, we reported a novel thermoplastic solid-solid PCMs prepared by a facile one-step feeding method. In this study, the esterification and transesterification among the molten mixture of PBT , PEG and adipic acid were conducted to prepare thermoplastic PEG/PBT/Adipic acid copolymer-based PCMs. Adipic acid, as an auxiliary encapsulation agent, could prevent effectively PEG leakage of PEG/PBT/Adipic acid copolymer-based PCMs with high PEG and low PBT content during the phase change process . For PCM-6 containing 91 wt% PEG, 8 wt% PBT and 1 wt% adipic acid, there were no changes in the shape and chemical structure after multiple thermal cycles. The TG results presented that the initial thermal degradation temperature of PCMs-6 was above 200 °C, which was much higher than the processing and working temperature of PCMs-6. The latent heat of PCMs-6 could reach 136.8 J/g, showing great potential for energy storage, especially in the field of green buildings.
研究领域:
材料科学
·
高分子化学
·
能源材料
·
热功能材料
·
绿色建筑
✓ 已验证
DOI
高影响因子
APPLIED CATALYSIS B-ENVIRONMENTAL
·
2023
·
IF 22.1
Xuan Liu,Jianying Wang,Zhongying Fang,Shuaiqi Gong,Dengke Xiong,Wei Chen,Deli Wu,Zuofeng Chen
Herein, an ultrafast electro-corrosion approach is developed for activating Ni foam (NF) into an efficient electrocatalyst for upcycling polybutylene terephthalate (PBT) waste plastic. The electro-corrosion process assisted by Cl − is completed by only 6 CV cycles (∼3 min) and the activity of the treated NF (T-NF), characterized by the integrated Ni 2+ /Ni 3+ peak area is enhanced by 150 times. The T-NF electrode exhibits excellent catalytic activity toward 1,4-butanediol oxidation , delivering a current density of 50 mA cm − 2 at 1.36 V (vs. RHE). This allows the electrocatalytic reforming of 1,4-butanediol component in PBT hydrolysate into succinate with a high Faraday efficiency 93%. The in-situ Raman and FTIR spectroscopies combining density functional theory calculations identify catalytically active centers, critical intermediates, and favorable pathway for 1,4-butanediol oxidation to succinate. This work provides an ultrafast one-step surface engineering strategy to turn pristine Ni foams into high-performance electrocatalysts for upcycling PBT plastic and other electrochemical applications.
研究领域:
材料科学
·
环境科学
·
化学工程
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DOI
高影响因子
DESIGNED MONOMERS AND POLYMERS
·
2022
·
IF 3.718
Shichang Chen,Xuhai Fu,Zhijun Jing,Hongzheng Chen
PBT and PET are subjected to thermal-oxidative degradation and thermomechanical degradation during the process of melt blending, which affect the polymer structure and properties. The effect of feed properties of PET and the addition of modified nanoparticles on blends are a question worthy of discussion. This work describes the melting and thermal stability, the crystallization behavior and non-isothermal crystallization kinetic, the rheological behaviors and mechanical properties of several PBT/PET blends prepared by twin-screw melt extrusion. Results show that the molecular chain of the polyester blends obtained by stable extrusion are not significantly degraded, there is only one obvious melting peak and crystallization peak on the thermal analysis curves, and the melting point is lower than either of the two polyesters. An appropriate amount of SD can effectively reduce the crystallization rate of the PBT material and extend the crystallization time. The rheological behavior of PBT/PET blends is complicated than PET raw materials and SD, as well as the melt processing temperature and shear rate will all affect the rheological behavior of the blends. For example, at low shear rate, polyester blends with SD exhibit strong shear thinning behavior. In general, the SD content affects the rheological property of blends in a way similar to the law of influence on crystallization behavior. When SD content is 0.3 wt%, a polyester product with higher elongation at break than pure PBT can be obtained. This can provide a useful reference for preparing commercialized polyester blend products with good melt processability and elongation by simple blending.
研究领域:
高分子科学
·
材料科学
·
化学工程
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产品关联
DOI
PubMed
高影响因子
POLYMERS FOR ADVANCED TECHNOLOGIES
·
2022
·Vol. 33
·期 7
·2265-2275
·
IF 3.348
Xuan Fei,Yingkang Zhu,Jinggang Wang,Zhen Jia,Xiaoqing Liu
To enhance the crystallization of poly(butylene 2,5-furandicarboxylate) (PBF) thus substitute its petroleum-based analogue poly(butylene terephthalate) (PBT), a series of high molecular weight poly(butylene-co-1,4-cyclohexanedimethylene 2,5-furandicarboxylate) (PBCF) copolyesters with low contents (0–19 mol%) of 1,4-butanediol (BDO) are synthesized from 2,5-furandicarboxylic acid (FDCA), 1,4-cyclohexanedimethylene (CHDM) and BDO. Their chemical structures and compositions are confirmed by nuclear magnetic resonance ( 1 H NMR and 13 C NMR). Their number average molecular weights are from 20,500 to 36,100 g/mol with the polydispersity index ( Ð ) of 1.67–1.99. The thermal stability and crystallization behaviors are investigated by thermogravimetric analyzer (TGA) and differential scanning calorimeter (DSC). Results show that PBCFs demonstrate comparable crystallization rate to PBT as the crystallization half time is from 18 to 29 s and the melting enthalpy is 34.1–41.4 J/g as well as the higher melting temperature of 238–263°C than 225°C for PBT. In addition, PBCFs exhibit excellent mechanical properties of tensile modulus between 1220 and 1510 MPa. These investigations suggest that a moderate amount CF unit can improve the melting temperature and enhance the originally weak crystallizability of furan-based polyesters. Generally, PBCFs can be the engineering plastic with satisfied thermal and mechanical performance.
研究领域:
材料科学
·
化学工程
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DOI
高影响因子
POLYMER TESTING
·
2023
·
IF 5.1
Jianbin Li,Yueling Chen,Jie Sun,Sheng Zhang,Jingbiao Ye,Ying Jin,Zhengqiu Li,Baoshu Chen
This study first prepared a layered intumescent flame retardant (IFR)-graphene oxide (GO). Then, the multi-scale polybutylene terephthalate (PBT) composites were prepared by introducing glass fiber (GF), boron nitride (BN), and nano SiO 2 flame retardant synergists of different shapes and sizes. The results showed that the SiO 2 -containing composites displayed excellent flame resistance with a flame retardant grade of V-0 and a limiting oxygen index (LOI) of 32%. The IFR-GO, PBT, and SiO 2 formed a multi-scale network structure where the three additives interacted via hydrogen bonding, catalyzing charring in situ. Finally, the composites were obtained with an excellent flame retardant grade and droplet resistance properties.
研究领域:
材料科学
·
高分子化学
✓ 已验证
产品关联
DOI
高影响因子
POLYMER ENGINEERING AND SCIENCE
·
2020
·Vol. 60
·期 12
·2967-2978
·
IF 1.917
Kunquan Li,Wenjian Wu,Shengyong Chai,Lei Tang,Jide Li,Yan Li,Qin Liu,Lin Chen
In this study, the copolymers of methyl methacrylate-co-glycidyl methacrylate (MGD) with different epoxy contents and molecular weights, the styrene-co-glycidyl methacrylate (SGD) and methyl methacrylate-co-maleic anhydride (MAD) were synthesized. The synthesized copolymers, styrene-co-maleic anhydride (SMA) and styrene-acrylonitrile-co-glycidyl methacrylate (SAG) were used as compatibilizers to enhance the impact strength of the acrylonitrile butadiene styrene/poly(butylene terephthalate) (ABS/PBT). The effects of differences in the structure, reactive group type, and molecular weight of the compatibilizers on the mechanical properties, phase morphology, melt viscosity, thermal stability, and melting temperature of the blend were studied. The results showed that functionalized copolymers were successfully synthesized with high monomer conversions. Addition of the functionalized copolymers increased melt viscosity but did not considerably affect thermal stability, tensile strength, flexural strength and melting temperature of the ABS/PBT blends. The compatibilizers improved the dispersion of the PBT phase and prevented brittle fracture, thereby increasing the impact strength of the blend. Among the studied compositions, the ABS/PBT/MGD-5 blend exhibited the highest impact strength of 25.8 kJ/m 2 and an appropriate melt flow index of 19.1 g/10 minutes. The compatibilizer should have an appropriate molecular weight to improve the interface bonding force. Regarding the melting viscosity, the reactive group content and compatibilizer dosage should be adjusted to ensure high impact strength.
研究领域:
材料科学
·
高分子化学
✓ 已验证
产品关联
DOI
高影响因子
PROPELLANTS EXPLOSIVES PYROTECHNICS
·
2024
·
IF 1.7
Hai-yang Yu,Lei Huang,Zhan-bin Nie,Wei-xiang He,Xing Zhou
Focusing on a new kind of solid propellants, which takes the ammonium dinitramide (ADN) as the high-energetic oxidant, and 3,3-bis(azidomethyl)oxetane and tetrahydrofuran copolymers (PBT) as the high-energetic fuel binder, the burning rates and the theoretical performance of the propellant were measured under different ADN contents, ADN sizes and pressures. The burning rates increased from 7.9 mm/s to 117.4 mm/s and 49.1 mm/s to 74.2 mm/s when the pressure increased from 0.1 MPa to 10 MPa and from 12 MPa to 20 MPa separately, with a singularity in the pressure dependence of the burning rate at around 10 MPa. In terms of the effect of the ADN content, under the experiment pressures from 0.5 MPa to 5.0 MPa, the burning rates of the propellant were promoted by the increase of the oxidizer loading in a range of 50 wt% to 75 wt%, with a transition from a kinetically-controlled reaction to a diffusion-controlled one. Within the condition scope of this study, no obvious effect of the ADN sizes on the propellant combustion properties was observed. This could be attributed to the solid-liquid mixed multiphase layer and the binder which served as a heat sink for the smaller ADN particles.
研究领域:
推进剂化学
·
燃烧动力学
✓ 已验证
产品关联
DOI
高影响因子
SENSORS AND ACTUATORS A-PHYSICAL
·
2022
·
IF 4.291
Nan Wang,Hui Sun,Xiaodong Yang,Wenbo Lin,Wenyu He,Hao Liu,Gajanan Bhat,Bin Yu
The flexible smart wearable device with low cost and high performance is highly desired but rather challenging. In this work, a wearable temperature sensor was developed by integrating the polybutylene terephthalate melt-blown nonwoven fabric (PBT NW) with reduced graphene oxide (rGO) and carbon nanotubes (CNTs) via a simple mechanical ultrasonication method. The microstructures of the rGO/CNTs@PBT NW sensor were investigated by FT-IR, XRD , and SEM techniques, and the thermal and mechanical properties of this sensor were systematically analyzed. The conductive rGO and CNTs could be tightly fixed to the surface of PBT NW. Compared with original PBT NW, the tensile properties of rGO/CNTs@PBT NW sensor were improved. The results of sensing performance tests showed that the prepared temperature sensor had high sensitivity (−0.737% °C −1 ) and linearity (R 2 =0.98) with a resolution of 0.1 °C between 25 °C and 45 °C, a long-term stability and good circularity indicating that our sensor can meet the monitoring requirement of real-time human body temperature. In addition, this sensor could also be used to monitor human respiratory rate. Our study may provide a new idea for the fabrication of the flexible temperature sensor with nonwoven substratefor monitoring the human body and environment temperature.
研究领域:
材料科学
·
智能穿戴设备
·
传感器技术
✓ 已验证
产品关联
DOI
高影响因子
MACROMOLECULAR RAPID COMMUNICATIONS
·
2023
·Vol. 44
·期 10
·2200972
·
IF 4.6
Zhiqiang Chen,Chenhui Cui,Chenyu Jin,Xiuzhao Li,Yifan Zhou,Yizhe Shao,Li Ma,Yanfeng Zhang,Tiejun Wang
Polymer blending is an efficient way to obtain extraordinary polymeric materials. However, once permanently cross-linked thermosets are involved in blending, there are challenges in designing and optimizing the structures and interfacial compatibility of blends. Vitrimer with dynamic covalent polymer networks provides an innovative opportunity for blending thermoplastics and thermosets. Herein, a reactive blending strategy is proposed to develop thermoplastic-thermoset blend with enhanced compatibility on the basis of dynamic covalent chemistry. Specifically, polybutylene terephthalate (PBT) and polymerized epoxy vitrimer can be directly melt blended to obtain tough and thermostable blends with desirable microstructures and interfacial interaction. Bond exchange facilitates the grafting of PBT and epoxy vitrimer chains, thus enhancing the interfacial compatibility and thermal stability of blends. The obtained blend balances the strength and stretchability of PBT and epoxy vitrimer, resulting in enhanced toughness. This work offers a new way of designing and fabricating new polymeric materials by blending thermoplastics and thermosets. It also suggests a facile direction towards upcycling thermoplastics and thermosets.
研究领域:
材料科学
·
高分子化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
MATERIALS CHEMISTRY AND PHYSICS
·
2018
·
IF 2.21
Jinyuan Bai,Yang Liu,Yanjun Hou,Shuhong Wang
A new luminescent europium(III) bis-β-diketonate complex, Eu 2 (PBT) 3 (NO 3 ) 3 (PBT = 1,1-(pyridine-2,6-diyl)bis(4,4,4-trifluoro-1,3-dione), was incorporated into the poly(methylmethacrylate) (PMMA) matrix and formed nanofibers via electrospinning technology. The different characterization techniques were adopted to reveal the effect of Eu 2 (PBT) 3 (NO 3 ) 3 on the spatial structure and optical properties of the nano-composite fibers obtained. The doping enhances the thermal stability and filament-forming properties for a series of PMMA-supported composite nanofibers Eu/PMMA, and in particular, the doping concentrations of 11 wt% also showed more efficient luminescence properties. Furthermore, the Judd-Ofelt theory was applied in this study to explain the effect of the distribution of Eu 2 (PBT) 3 (NO 3 ) 3 and the mutual effect of the Eu 2 (PBT) 3 (NO 3 ) 3 coordination compound and surrounding fractions of PMMA.
研究领域:
材料科学
·
光学
✓ 已验证
DOI
高影响因子
NEW JOURNAL OF CHEMISTRY
·
2025
·
IF 2.5
Zhongliang Guo,Yuqin Zhu,Yu Mi,Zhiyong Zhang,Huiying Wen,Lubin Liu,Miaojun Xu,Bin Li
In this study, a phosphorus-containing thermotropic liquid crystal copolyester (p-TLCP) was synthesized via melt polycondensation using 2-(6-oxid-6H-dibenzo<1,2>oxaphosphorin-6-yl)-1,4-benzenediol (DOPO-HQ), terephthalic acid (TPA), p-hydroxybenzoic acid (p-HBA), and dimethyl terephthalate (DMT) as raw materials with a molar ratio of 3:3:2:2. The flame-retardant p-TLCP was subsequently incorporated into polybutylene terephthalate (PBT) to fabricate composites. The thermal properties, flame retardancy, and mechanical performance of the PBT/p-TLCP composites were systematically investigated through limiting oxygen index (LOI), vertical burning (UL-94), cone calorimetry, dynamic thermomechanical analysis (DMA), tensile/impact testing, scanning electron microscopy (SEM), coupled with laser Raman spectroscopy (LRS) and Thermogravimetric-Fourier Transform Infrared Spectroscopy (TG-FTIR). Results revealed that the flame retardancy and mechanical properties of the composites were markedly improved with increasing p-TLCP content. When the p-TLCP addition was 10.0 wt.%, the LOI value of the composite increased from 22.0% (pure PBT) to 27.0%, achieving a UL-94 V-0 rating; at a p-TLCP loading of 12.5 wt.%, the peak heat release rate (PHRR) and total heat release (THR) decreased by 22.4% and 35.8% relative to pure PBT, respectively, while the storage modulus and tensile strength were elevated by 22.8% and 19.4%, with impact strength reaching 30.5% enhancement, demonstrating optimal comprehensive performance.
研究领域:
高分子科学
·
材料工程
·
化学合成
·
热分析
·
阻燃性能
✓ 已验证
产品关联
DOI
高影响因子
COMPOSITES PART A-APPLIED SCIENCE AND MANUFACTURING
·
2026
·
IF 8.9
Qiang Zhang,Bo Wu,Yujun Chen,Guiquan Liao,Xiaoqiong Xie,Yu-Zhong Wang
The extensive use of flame-retardant polyester composites, notably polybutylene terephthalate (polybutylene terephthalate, PBT), has resulted in a growing accumulation of non-biodegradable plastic waste, posing significant challenges to both environmental sustainability and resource recovery. These materials, which contain brominated flame retardants and inorganic fillers, are resistant to conventional recycling methods, contributing to long-term ecological risks. In this study, we propose a comprehensive chemical recycling strategy for post-consumer flame-retardant PBT composite materials (PBT-FrCM), integrating staged depolymerization, solvent extraction, and monomer purification to achieve efficient recovery and reuse of all major components. The recovered monomer, bis(4-hydroxybutyl) terephthalate (BHBT) (99.7% purity), brominated flame retardants (99% recovery), and inorganic fillers were successfully reintegrated into regenerated flame-retardant PBT composites (rPBT-FrCM) that exhibit mechanical and flame-retardant properties comparable to those of virgin materials. Life cycle assessment demonstrates that the process reduces greenhouse gas emissions, while highlighting energy consumption and solvent toxicity as key areas for improvement. An economic evaluation indicates that recycling 1 tonne of waste PBT generates a net value of 5041 CNY, illustrating the dual environmental and economic benefits of this approach. These findings underscore the potential of closed-loop upcycling for engineering plastics and provide a scalable pathway toward a more circular, climate-resilient material economy.
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DOI
高影响因子
危险品化学品经营许可证（带存储）