Journal of Industrial Textiles
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2018
·
IF 1.283
Feichao Zhu,Juanjuan Su,Mingjun Wang,Munir Hussain,Bin Yu,Jian Han
With increasing demands on the high-performance and environmental-friendly melt-blown nonwovens (MBs) for separation and filtration, herein, we reported a poly(lactic acid)/polyamide 11 (PLA/PA11) 100% bio-based MBs in situ compatibilized by dual-monomer glycidyl methacrylate–styrene melt-grafted poly(lactic acid) (PLA-g-(St-co-GMA)). The morphology, crystallization, thermal and rheological behaviors of reactive extruded PLA/PA11/PLA-g-(St-co-GMA) melt blends were investigated, and the structure and filtration performance of corresponding MBs were fully characterized. The results indicated that the interface between PLA and PA11 were effectively improved due to the compatibilizer of PLA-g-(St-co-GMA). PA11 promoted the cold crystallization and enhanced the thermal stability of PLA matrix. The reactive blends displayed a higher viscosity with unchanged rheological behaviors compared with PLA. In comparison with PLA MBs, the average fiber diameter and pore size of PLA/PA11/PLA-g-(St-co-GMA) MBs were slightly increased, whereas the strength and toughness were significantly improved. All the PLA/PA11/PLA-g-(St-co-GMA) MBs presented high air permeability and low filtration resistance. High filtration efficiency (>99.8%) could also be obtained especially for the target particles with diameters larger than 2.5 µm.
研究领域:
材料科学
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环境科学
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高分子化学
✓ 已验证
产品关联
DOI
高影响因子
RSC Advances
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2020
·Vol. 10
·期 35
·20405-20413
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IF 3.119
Yipu Jin,Ning Chen,Yijun Li,Qi Wang
Piezoelectric materials featuring the capability of converting mechanical energy to electricity are very important for harvesting discrete mechanical energy to meet the rapidly increasing demand for cleaner energy. However, the intrinsic poor flexibility and processability make it difficult for current piezoelectric materials to fulfill their potential. This study reports a novel polyamide 11 (PA11)/BaTiO3 (BT)/graphene (Gr) ternary nanocomposite 3D printed part with significantly enhanced dielectric and piezoelectric properties due to its special discontinuous graphene network and microspores. The piezoelectric BT nanoparticles with excellent piezoelectric properties were uniformly dispersed into PA11 via a solid-state shear milling (S3M) technology. Moreover, via ultrasonic coating and selective laser sintering (SLS) technology, the discontinuous graphene network and microporous structures were both fabricated in the prepared 3D printed parts. The graphene interfaces acted as electrodes, and thus significantly increased the poling efficiency, while the porous structure further magnified the stress concentration. As a result, a piezoelectric coefficient (d33) of 3.8 pC N−1 and open-circuit voltage of 16.2 ± 0.4 V were obtained, exhibiting better comprehensive performances than those of most reported piezoelectric materials.
研究领域:
材料科学
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能源工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF POLYMERS AND THE ENVIRONMENT
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2025
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IF 5
He Kaijun,Zhou Guanpeng,Li Yanyan,Shen Jiajia
Polyamide 11 (PA11) is a novel type of 100% bio-based and renewable fiber which can not achieve good dyeing results for conventional water bath dyeing techniques due to its smooth surface and long carbon chain hydrophobic structure. Furthermore, conventional dyeing processes typically involve extensive use of water and chemical reagents, driving up production costs and exerting serious ecological damage. The development of a new dyeing method suitable for bio-based PA11 fibers is crucial for sustainable development in the textile industry. In this study, we present a novel method for achieving effective dyeing of bio-based PA11 fibers using only dyes, calcium chloride (CaCl 2 ), and recyclable ethanol (EtOH), eliminating the necessity for additional chemical reagents. The dyeing process operates at a reduced temperature (80 ℃) and bypasses the pre-treatment stage for PA11. Compared to the traditional aqueous dyeing, the novel method significantly enhances dye uptake (> 98%) and color depth (K/S value) of PA11, while maintaining comparable color fastness ( ≧ grades 3–4), and acceptable mechanical properties. In addition, the new dyeing method has minimal impacts on the structure and performance of bio-based PA11 fibers. This is of great significance for the development and application of bio-based PA11 in the field of chemical fibers. Graphical abstract
研究领域:
纺织科学
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环境科学
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材料科学
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2025
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IF 8.2
Ning Wang,Weifeng Yang,Shuhan Wang,Kerui Li,Yaogang Li,Qinghong Zhang,Chengyi Hou,Hongzhi Wang
Triboelectric textiles have been extensively studied for wearable energy applications, including single-fiber power generation, humidity-resistant power generation, air-breakdown-based power generation, etc. However, intrinsic tribo-charge transfer in fiber- or textile-based triboelectric materials remains at a low level. Here, we propose a polarization strategy to enhance triboelectric performance using α-phase polyamide 11 nanoribbons. By employing a high-voltage electrostatic field during electrospinning, we achieve in situ polarization of polyamide 11, resulting in an 116% improvement in the performance of polyamide 11-based energy nonwovens. Additionally, we apply cold pressing to optimize the specific surface area and air permeability of the all-fiber-energy nonwoven, achieving a balance of high electrical performance and wearability. We further demonstrate applications of this nanofiber-based energy textile in wireless sensing and breathable energy insoles. This all-fiber performance enhancement strategy provides valuable insights for the development of high-performance triboelectric textiles in the future.
研究领域:
材料科学
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能源技术
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纺织工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
MATERIALS & DESIGN
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2018
·
IF 4.525
Fangwei Qi,Ning Chen,Qi Wang
Polyamide11 (PA11)/BaTiO 3 /carbon nanotube (CNT) ternary nanocomposites (PBCNCs-3D) with 3D segregated percolation routes were fabricated by selective laser sintering (SLS) of CNT-coated PA11/BaTiO 3 nanocomposite powder. The CNT-coated PA11/BaTiO 3 nanocomposite powder show a higher laser absorption and wider sintering window than those of conventional PA11/BaTiO 3 /CNT ternary nanocomposite powders with a structure where CNTs are randomly distributed throughout the powder particles, endowing the composite powders with better sinterability . The 3D segregated conductive pathway was efficiently constructed in the PBCNCs-3D parts with a low percolation threshold of 0.3 wt%. The PBCNCs-3D parts showed a higher dielectric constant of 16.2 at a frequency of 1 kHz, which is approximately twice higher than that of SLS-printed composite parts (PBCNCs) without a segregated structure. Compared with PBCNCs, the piezoelectric strain coefficient increased from 1.7 to 2.1 pC/N. These results not only provide a new material for SLS processing but lay the groundwork to enhance the performance of piezoelectric polymer composites by constructing 3D segregated percolation routes.
研究领域:
材料科学
·
复合材料
·
增材制造
✓ 已验证
产品关联
DOI
高影响因子
MATERIALS & DESIGN
·
2017
·
IF 4.364
Fangwei Qi,Ning Chen,Qi Wang
The polyamide11 (PA11)/BaTiO 3 nanocomposite powders for use in selective laser sintering (SLS) were successfully prepared through a novel method combining the techniques of solid state shear milling, melt blending and cryogenic grinding . This provided a method for the large scale and non-solvent production of functional nanocomposite powders. The related mechanism, structure and properties of the obtained composites were investigated. The results indicated that the solid state shear milling technique could efficiently realize better dispersion of BaTiO 3 nanoparticles in the PA11 matrix and improve their interfacial compatibilities, endowing the composites with better processability and electrical performance. The sintering windows (between the initial temperature of melting and crystallization) of the PA11/BaTiO 3 nanocomposites were greatly enhanced by the solid state shear milling technique, especially for the composites containing 40 wt% BaTiO 3 particles, for which the sintering window increased from 10.1 °C to 14.6 °C, providing a wide sintering window for SLS. Meanwhile, the dielectric constant (ε r ), piezoelectric strain coefficient (d 33 ) and piezoelectric voltage coefficient (g 33 ) of the SLS printed PA11/BaTiO 3 nanocomposite parts increased after the milling treatment. Finally, the complex PA11/BaTiO 3 nanocomposite parts with high dimensional accuracy and good mechanical properties were fabricated by the SLS machine.
研究领域:
材料科学
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高分子材料
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增材制造
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）