Science Advances
·
2025
·Vol. 11
·期 17
·
IF 12.5
Zhenggang Gong,Xianggang Weng,Deli Wu,Zhendong Lei,Guangxu Yang,Li Shuai
Increasing efforts have been devoted to developing biobased and biodegradable plastics and composites from lignocellulosic biomass. Current bioplastic production entails multiple challenging steps including monomer production from biomass as well as polymer synthesis and modification. Here, we report a practical recombination strategy to transform agricultural residues into moldable cellulose-reinforced lignin (CRL) composites. The strategy involves deconstruction of biomass particles followed by thermo-compression molding of cellulose fibers and lignin mixtures. The resulting CRL composites demonstrated excellent mechanical and thermal properties as well as water, abrasive, and flame resistance. Mechanistic studies reveal that small particle size, removal of water-soluble fractions, as well as reservation of lignin and its cross-linking reactivity have considerably positive effects on preparation of high-quality composite items. These insights offer a versatile strategy for transforming various types of low-grade biomass, such as corn stover, into eco-friendly and potentially biodegradable or compostable composites that can serve as sustainable alternatives to traditional duroplast materials.
研究领域:
材料科学
·
生物工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Surfaces and Interfaces
·
2024
·
IF 5.7
Fengdong Teng,Na Li,Ying Yuan,Yutong Cao,Junrong Yu,Yan Wang,Zuming Hu
Poor interfacial bond strength and complex processing limit the widely use of para-aramid paper. Here, the meta-poly(p-phenylene terephthalamide) (MPPTA) was obtained by introducing poly(m-phenylene isophthalamide) (PMIA) segments into the PPTA rigid molecular chains via secondary polymerization. The rigid-soft molecular structure not only gives MPPTA excellent thermal stability, but also enables the MPPTA fibrids to bond to the PPTA chopped fibers by plastic deformation during hot pressing. The tensile strength of Precipitated-MPPTA-paper (P-MPPTA-p) was increased by 20.3 % compared to Precipitated-PMIA-paper (P-PMIA-p). And the interfacial bond strength of aramid paper can be further improved by combining MPPTA solution and PPTA nonwoven fabric through a simpler and more efficient solution casting method, which together with more moderate hot pressing conditions can lead to the tensile strength of aramid paper up to 109.1 MPa, as well as exhibiting higher resistance to tearing and heat aging. The present study provides a new idea for the efficient preparation of para-aramid paper with excellent comprehensive performance.
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
Journal of Materials Research and Technology-JMR&T
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2023
·
IF 6.4
Jinhui Wang,Ruisong Wang,Xiaoxiao Ji,Chunde Jin,Yutao Yan
Phenol formaldehyde (PF) resin adhesives are widely used in the production of bamboo-based composites owing to their excellent bonding strength and durability. However, the inherent brittleness of cured PF resin may result in notable stress concentration at the interface between PF resin and bamboo bonding, leading to the generation of cracks. In this study, a hyperbranched compound polyethyleneimine (PEI) with high reaction activity was incorporated into a PF resin adhesive to toughen the adhesive and the bonding interface. And the effects of PEI incorporation on the properties of the adhesive and the bonding performance between PF resin and bamboo were comprehensively investigated. The results showed that introduction of flexible PEI chains could effectively facilitated stress transfer, avoiding stress concentration, thus enabling efficient energy release and play a toughening effect. In addition, PEI could react with PF resin and bamboo components during hot pressing, forming a three-dimensional network structure and enhancing the bonding interface, which was proved by FT-IR and XPS analysis. When 1 wt% PEI was incorporated, the bending strength and Charpy impact toughness of the modified PF resin was significantly increased by 38.88% and 76.02%, respectively, compared with the pure PF resin. While the dry and wet shear strength of the bamboo composite bonded by the PEI modified PF resin were also obviously increased. This study is expected to address the problem of cracking in the bonding interface of bamboo composite, and endow the composites with high strength and durability, which can prolong its service life and contribute to the healthy and sustainable development of the bamboo industry.
研究领域:
材料科学
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木材科学与技术
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高分子化学
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复合材料工程
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胶接与界面科学
✓ 已验证
DOI
高影响因子
POLYMER COMPOSITES
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2025
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IF 4.7
Xiao Li,Yanhua Kang,Jian Chen,Zhaozhe Yang,Guomin Wu,Zhenwu Kong,Guifeng Liu,Can Jin
Bamboo fiber (BF) reinforced epoxy resin (EP) composites suffer from poor interfacial compatibility and uneven dispersion at high filler levels, restricting the further improvement of the mechanical properties of BF/EP composites. This study proposes a green and novel process for preparing composites based on an aqueous system, which enables effective dispersion of BF at high filler content and uniform integration with EP. BF is simply mixed with waterborne epoxy resin (WEP), and a hot-pressing molding process is used to prepare composite materials with high BF filler. The effects of fiber contents and resin types on the properties of the composites are investigated. At 80 wt% BF, the mechanical properties of the composite are optimized, with flexural strength and tensile strength of 124 and 53 MPa, respectively. This research provides a viable solution for the green and low-cost preparation of high-fiber-content composites, which shows great potential application in the fields of construction, automotive interiors, and sports equipment.
研究领域:
材料科学
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复合材料工程
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高分子材料
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绿色制造
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可持续材料
✓ 已验证
产品关联
DOI
高影响因子
Materials Today
·
2025
·
IF 22
Feng Gu,Xianhao He,Youhang Wei,Xiuxue Niu,Zhaosheng Cai,Bo Jiang,J.Y. Zhu,Wangxia Wang
This study presents a novel approach to fabricate wood composites with exceptional flame retardancy, superior strength and toughness, as well as superhydrophobic/self-cleaning properties. The fabrication process involves densifying delignified wood pre-impregnated with a nitrogen-phosphorus flame retardant via hot-pressing, followed by an adhesive-free, self-curing superhydrophobic dip-coating. The resulting wood exhibits remarkable synergistic performance: exceptional flame retardancy, with peak heat release rate (pHRR) and total heat release (THR) decreased by 77.7 % and 63.6 %, respectively, compared with pristine wood; superhydrophobicity/self-cleaning with a water contact angle (WCA) of 161.2° and sliding rolling off angle (SA) of 3.9°; and outstanding mechanical performance with a tensile strength of 439 MPa and fracture toughness of 8.7 MJ/m 3 . Notably, this innovation addresses two critical challenges in fire-retardant wood technology—preventing flame retardant leaching and eliminating flammable adhesives—thereby offering a scalable method for the commercial production of high-performance wood composites suitable for applications in green architecture, transportation, and safety–critical infrastructure.
研究领域:
材料科学
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阻燃技术
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木材科学
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表面工程
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复合材料
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
·
2017
·Vol. 28
·期 11
·8043-8050
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IF 2.019
Chen Jianwen,Yu Xinmei,Yang Faquan,Fan Yun,Jiang Yewen,Zhou Yuexia,Duan Zhikui
High-energy-density flexible composite films, using one dimension BaTiO 3 @Ag nanofibers (BT@Ag NFs) as fillers and PVDF as polymeric matric, have been prepared by solution casting and the following hot compressing molding. The BT@Ag NFs have been prepared by electrospinning and then chemical deposition method. The dielectric constant, dielectric loss, breakdown strength and energy density were studied systematically. The maximum dielectric constant is 42.8 at 1 kHz in the nanocomposites loading with 15 vol% BT@Ag NFs, which is about 515% larger than that of the pristine PVDF (8.3 at 1 kHz). The energy density of the 2.5 vol% BT@Ag NFs/PVDF nanocomposites is 7.75 J cm − 3 at 3500 kV m − 1 , which is about 645% over the biaxially oriented polypropylenes (1.2 J cm − 3 at 6400 kV m − 1 ). The enhanced energy density may be ascribed to the Coulomb block effect. Such improvements are of potential importance for preparation of high-energy-density nanocomposites.
研究领域:
材料科学
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电气工程
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纳米技术
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复合材料
✓ 已验证
产品关联
DOI
高影响因子
POLYMER COMPOSITES
·
2025
·
IF 4.7
Yuwen Feng,Xiaoliang An,Hang Jia,Yu Zhang,Yue Qiao,Xi Chen,Zhendong Zhang,Xigao Jian,Cheng Liu
Multiwalled carbon nanotubes (MWCNTs) have demonstrated considerable potential for enhancing the mechanical performance of carbon fiber-reinforced high-performance thermoplastic polymer (CFRHPTP) composite. However, due to their tendency to aggregate within the thermoplastic matrix, overall performance improvements are limited. In order to address these issues, MWCNTs grafted with poly(bisphthalazinone ether sulfone ketone) (PBPESK@MWCNTs) were prepared by a diazotization reaction and then introduced into carbon fiber reinforced PBPESK (CF/PBPESK) composite laminates by dispersion in resin solution, which was immersed by CF to prepare prepregs, followed by a vacuum hot-pressing process. The structural and morphological characterization of PBPESK@MWCNTs was performed by Fourier transform infrared spectroscopy, Raman and X-ray photoelectron spectroscopy spectra, scanning electron microscopy (SEM), and transmission electron microscopy. The storage modulus and glass transition temperature of CF/PBPESK composites have been improved to 146 GPa and 322°C, respectively. Furthermore, the flexural strength, flexural modulus, and interlaminar shear strength of PBPESK@MWCNTs/CF/PBPESK composite were increased by 42.3%, 44.6%, and 42.9%, up to 1696 MPa, 162 GPa, and 70 MPa, respectively. Finally, the mechanism of reinforcement of composites by the introduction of PBPESK@MWCNTs has been revealed by SEM. Overall, this study highlights the potential of high-performance thermoplastic polymer-grafted MWCNTs as a strategy to enhance the mechanical performance of CFRHPTP composites to meet the application requirements.
研究领域:
材料科学
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纳米技术
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聚合物复合材料
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机械工程
✓ 已验证
产品关联
DOI
高影响因子
Journal of Environmental Chemical Engineering
·
2023
·Vol. 11
·期 3
·110269
·
IF 7.7
Jinghua Li,Haofeng Zhu,Dandi Fang,Xusheng Huang,Chaoqun Zhang,Ying Luo
Although the recycling and reuse of polyurethane foam (PUF) is a promising route to deal with this type of waste commodity polymer, highly efficient and green processing protocols are a great challenge due to their stable crosslink structure. In this study, a strategy of urethane exchange reactions was proposed to transform commercial rigid PUF into PUF sheets. The process was composed of the pulverization of the foam, the pretreatment method and the hot pressing. The effects of the pretreatment method on the structure and properties of the recycled commercial PUF were studied. The results show that the ball milling pretreatment method can effectively pulverize the commercial PUF into powder of 74.5 µm and a specific surface area as high as 2991.0 m 2 /kg, which can promote the urethane exchange reaction in close contact with the catalyst. The recycle method of ball milling pretreatment makes the crosslink density and tensile strength of the PUF sheets reach 2236.8 mol/m 3 and 32.6 MPa, which means an increase of 9.9 times and 3.3 times, respectively, compared to the method of other pretreatment. Moreover, PUF sheets can still maintain 71.5% of the tensile strength after two cycles of recycling, indicating the potential of this recycling method for PUF. This simple and efficient method enhances the sustainability of rigid PUF utilization and shows the enormous potential for value-added recycling of thermosets .
研究领域:
高分子材料科学
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环境科学与工程
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绿色化学
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资源循环利用
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材料再生
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可持续材料技术
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功能高分子
✓ 已验证
DOI
高影响因子
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2024
·
IF 7.7
Lei Zhang,Jie Zhang,Chao Lv,Li Gao,Shupin Luo,Yiping Ren,Liang Chang,Xueqi Chen,Qiheng Tang,Wenjing Guo
The primary purpose of this work is to study the fabrication of a flexible natural cellulosic fiber composite. In this respect, natural cellulosic fiber was obtained by modified poplar wood fiber through sodium hydroxide (NaOH) and γ-Aminopropyl Triethoxysilan. Then, the composites were fabricated by hot-pressing the modified wood fibers and polyurethane following characterization. Fourier transform infrared spectroscopy (FTIR), X-ray photoelectron spectroscopy (XPS), and scanning electron microscope (SEM) observation results confirmed that some of the hemicellulose and lignin were removed from wood fibers after NaOH modification and successfully grafted with alkoxy structures after KH550 modification. NaOH&KH550 modification improved the interfacial compatibility between poplar wood fibers and polyurethane. The flexibility of the composites was improved (the slenderness value was reduced by 113 %), allowing flexible deformations such as bending, twisting, and knotting. In addition, thermal stability , tensile strength (increased by 105 %), elongation at the break (increased by 125 %), and water resistance were increased. This flexible natural cellulosic fiber composite is expected to be applied in the veneering of curved materials and special-shaped structure furniture, providing a theoretical basis for improving the added value of wood-based composites.
研究领域:
材料科学
·
木材科学与技术
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF MATERIALS SCIENCE
·
2022
·Vol. 57
·期 3
·2305-2317
·
IF 4.682
Qin Guofeng,Chen Anfu,Huang Dejie,Lai Jindi,Fang Chuangkai,Zhang Zhengrong,Zhang Jingjing,Lei Caihong
Since the surface structure of natural biology was discovered, highly hydrophobic surfaces, deriving from cuticles of animals and plants with extremely high or low water droplet adhesion, have attracted a great attention due to their significance in basic research. The present work proposes flexible template replication methods for bio-inspired polycarbonate (PC) surfaces with highly structured square micropillars and rectangular pyramids arrays. Further, silica nanoparticles (SNPs) or the 1H,1H,2H,2H-perfluorodecyltrichlorosilane (FDTS) coated on templates were transferred to the PC melt during the process of hot compression molding and firmly adhered to the skin of the PC replicas, forming hierarchical microstructure. The low-surface-energy matter SNPs or FDTS can increase the heights of microstructure in the open-ended templates and miniaturize the dimensions of microstructure in the conically ended templates. The results indicate that the SNPs can enhance the physical topology of PC replica surfaces, and the FDTS can diversify the chemical ingredients of PC replica surfaces. The consequent surface frame containing air-pockets that house highly water-resistant and mechanically rigid submicron structure formed by accumulation of SNPs. Apparently, with the ability to work under a water pressure of up to 1100 Pa, the microstructured PC surface exhibits a high-efficiency self-cleaning performance by a combination of droplet bouncing and rolling behaviors with a maximum height of bounced droplets up to ∼3.98 mm (i.e., 1.6 times the diameter of the droplet) after impacting. Graphical abstract
研究领域:
材料科学
·
表面工程
·
纳米技术
·
仿生学
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）