CHEMICAL ENGINEERING JOURNAL
·
2025
·
IF 13.2
Yan Jiang,Mengmeng Yang,Liyun Cheng,Lu Xiao,Xinyi Wang,Ruixuan Liu,Yiyan Wu,Shuangfei Wang,Xiuyu Liu
The integration of lignocellulosic nanomaterials into energy management applications possesses enormous technical appeals catering to high-tech and low-carbon era. Nature has designed hierarchical and heterogeneous lignocellulose microstructure, which can be harnessed for desirable dielectric behaviors towards specific applications. Here, we make the first attempt to boost the tribopositivity of 2D self-assembly (i.e., nanopaper) of cellulose nanofibrils by leveraging the inherent functionality of their hemicellulose phase. In comparison to conventional nanopapers assembled from TEMPO-oxidized/enzymatic cellulose nanofibrils with significantly lower hemicellulose content (4.6/12.2 vs. 20.3 wt%), the as-prepared hemicellulose-rich nanopaper exhibits ~2-fold higher electron-donating capability, which in turn generates ~1.5-fold higher triboelectric nanogenerator (TENG) output when paired with given tribonegative materials. We provide multiscale insights into the boosted tribopositivity of nanopaper by hemicellulose phase arising from its unique molecular structure and micro-distribution pattern. Furthermore, amorphous hemicellulose phase can be readily molecularly designed, e.g., aminosilanization, which further enhances the tribopositivity of nanopaper towards self-powered applications requiring high energy density. Besides, the hemicellulose-rich nanopaper is highly writable, mechanically strong, and optically transparent, serving as a desired structural material with favorable programmability for various TENG-based sensing, encryption and wearable devices.
研究领域:
材料科学
·
生物基材料
·
能源技术
✓ 已验证
DOI
高影响因子
Nano Energy
·
2019
·
IF 15.548
Zeeshan Haider,Abdul Haleem,Rafi u Shan Ahmad,Umar Farooq,Lin Shi,Uzabakiriho Pierre Claver,Kashan Memon,Azam Fareed,Irfan Khan,Momoh Karmah Mbogba,S. M. Chapal Hossain,Faryal Farooq,Wajahat Ali,Muhammad Abid,Akeel Qadir,Weidong He,Jikui Luo,Gang Zhao
The ongoing research for tribonegative materials has resulted in significant progress in triboelectric nanogenerators (TENG), but the search for tribopositive materials is limited. Therefore, it is still a challenging task to achieve low cost, readily available, easy process for fabrication of tribomaterials with high positive triboelectric properties for triboelectric nanogenerators. Here we propose a novel method to synthesize high porous cryogel films based on facile freezing, ultraviolet radiation and thawing processes and used it as the tribopositive material for TENG fabrication while spin-coated polydimethylsiloxane (PDMS) is used as the tribonegative material. The cryogel/PDMS TENG device with a dimension of 1 × 2 cm 2 showed an open circuit voltage of 170 V, and a short circuit current density of 17.1 mA/m 2 and an instantaneous power density of 2.95 W/m 2 which is able to light up 180 white LEDs directly. Thorough investigations divulged that the high output performance of TENG can be attributed to the porous structure of the cryogel films and the formation of high-density mechanoradicals associated with the porous structure, which was proved by using radical scavanger 2,2,6,6-tetramethyl-1-piperidinyloxy. This study provides a simple, cost-effective and easy way of preparing cryogel films as the tribopositive material for TENGs, which increases the portfolio of tribopositive materials used for triboelectric nanogenerator with prodigious prospects.
研究领域:
材料科学
·
能源技术
·
高分子化学
✓ 已验证
产品关联
DOI
高影响因子
ACS Nano
·
2024
·
IF 15.8
Xinglin Tao,Peng Yang,Zhaoqi Liu,Siyao Qin,Jun Hu,Zhao-Xia Huang,Xiangyu Chen,Jin-Ping Qu
The energy conversion efficiency of a triboelectric nanogenerator (TENG) is severely limited by the charge density of triboelectric materials, while drastic and unavoidable charge decay happens during contact due to the insufficient charge retention capacity of positive triboelectric materials. Here, elaborately synthesized acid-ion-doped pyridine-based polybenzimidazole processing with strong charge retention capability is demonstrated to couple with negatively corona-polarized electrets. As illustrated by thermal stimulation and an ion mass spectrometer, the formation of acid-ion chimerism processes high activation energy for stored charges, and the selective anion migration can compensate the escape of polarized charge. Accordingly, the charge density can reach up to 596 μC m–2 and the charge retention rate reaches 49.7%, which is so far the highest intrinsic charge density obtained in the open air. Thus, the ionic chimerism strategy provides an effective way to suppress the charge escaping in the open air and gives a great expandable avenue for the material challenges of TENG’s practical deployment.
研究领域:
材料科学
·
纳米技术
·
能量转换
·
静电学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF MEMBRANE SCIENCE
·
2021
·
IF 8.742
Qi Shen,Ding Yu Xing,Feiyun Sun,Wenyi Dong,Fengjiao Zhang
Thin film nanocomposite membranes have become a feasible technology for heavy metal wastewater treatment . However, how to enhance the dispersibility and compatibility of nanomaterials in the selective layer is an important issue to improve the membrane performance of heavy metal removal . In this study, silica-poly(ionic liquid) nanoparticles were incorporated in the selective layer of TFN membranes. 1-Allyl-3-methyl imidazolium hexafluorophosphate ([AMIm]PF 6 ) was selected to modify silica (SiO 2 ) particles. The formed poly([AMIm]+) brushes provided charge properties to enhance dispersibility and organic part to improve compatibility in the polyamide layer of NF membranes. The resultant TFN membranes incorporated with SiO 2 -[AMIm]PF 6 particles exhibited an increment of 34% water permeation and 41.6% MgCl 2 rejection. Moreover, with an average rejection improvement of around 15% for heavy metal ions at pH = 5–6, the SiO 2 -[AMIm]PF 6 /PA membrane showed its superiority beyond the PA membrane. The electropositivity and microporous structure of the SiO 2 -[AMIm]PF 6 particles enhanced their dispersibility and compatibility in the polyamide layer. Meanwhile, the proper pore size and structure of the SiO 2 -[AMIm]PF 6 particles contributed to the channels for water transport and the sieving effect for most heavy metal ions. This work may facilitate the applications of TFN membranes in heavy metal wastewater treatment to alleviate the “trade-off” phenomenon.
研究领域:
环境工程
·
材料科学
·
水处理
·
纳米技术
✓ 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）