PROGRESS IN ORGANIC COATINGS
·
2024
·
IF 6.5
Zewen Lu,Jingbo Mu,Chaowen Guan,Shufeng Zhao,Tianshuo Sui,Shimin Liao,Zengcai Guo
There has been extensive research on conductive hydrogels, however, the current lack of practical applications is a significant issue. The crucial challenge lies in effectively integrating conductive hydrogels into practical use. Here, a uniform multifunctional hydrogel was facilely fabricated by integrating nitrogen-doped carbon capsules (N-Cc) and g-C 3 N 4 to PEO/PVA hydrogels (VECGNC). The introduction of a double network structure through carbon material endows the VECGNC hydrogel with exceptional mechanical strength (stress: 47.2 kPa; strain: 318 %) and high electrical conductivity (0.025 S cm −1 ). And it showed a good linear relationship between the temperature and pressure difference. Taking advantage of these properties, a logic gate circuit capable of sensing external pressure changes and effecting corresponding adjustments was constructed. Moreover, the strain sensitivity hydrogel designed in this work is capable of intelligent new traffic lights. Our work offers novel insights and methodologies for the utilization of multifunctional hydrogels in multi-scenario temperature and strains ensing applications.
研究领域:
材料科学
·
生物医学工程
✓ 已验证
产品关联
DOI
高影响因子
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2024
·
IF 7.7
Wanqi Feng,Sixuan Wang,Yiqun Liu,Mengqi Shi,Deyin Xie,Yankun Wang,Yongjie Jiang,Hui Cao,Di Cai,Jianbo Zhao
Sediment from the effluent of cotton spinning industry was valorized as the renewable bio-based polyols substitute for the rigid polyurethane (RPUFs), targeting to generate the economic and environmental benefits. Before reaction with the isocyanate, the sediment was functionalized by hydroxymethylation, in order to increase the density of the active hydroxyl groups for higher reactivity. The structural characterization results of the functionalized sediment indicated the material exhibited narrow molecular weight distribution, high hydroxyl groups content, and highly aromatic skeleton, which can be qualified as the renewable polyols for the RPUFs. In the crosslinking process, the effect of the polyols substitute rate of the sediments on the physio-chemical properties and the thermo-resistant performances of the resulting RPUFs was investigated. Specifically, in the group with 30 wt% of polyols substitution, the received foam exhibited comprehensive superiorities in compressive strength (0.58 MPa), apparent density (58 kg m −3 ), and thermo-conductivity (0.032 W m −1 K −1 ). Attractively, the RPUFs also exhibited good flame retardancy. The burning time can be extended by 30 % compared to the control group that without the sediment's substitution. Moreover, the RPUF also possessed good degradability, allowing for harmless recycling. The current work provided a potential route for the valorization of the hazardous waste effluent from the cotton spinning industry.
研究领域:
材料科学
·
环境科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
BIOMACROMOLECULES
·
2024
·
IF 5.5
Xinhong Cai,Xuefeng Zhao,Sakil Mahmud,Xiaoqin Zhang,Xiaoxing Wang,Jinggang Wang,Jin Zhu
A synthetic biopolymer derived from furandicarboxylic acid monomer and hydroxyethyl-terminated poly(ether sulfone) is presented. The synthesis involves 4,4′-dichlorodiphenyl sulfone and 4,4-dihydroxydiphenyl sulfone, resulting in poly(butylene furandicarboxylate)-poly(ether sulfone) copolyesters (PBFES) through melt polycondensation with titanium-catalyzed polymerization. This facile method yields segmented polyesters incorporating polysulfone, creating a versatile group of high-temperature thermoplastics with adjustable thermomechanical properties. The PBFES copolyesters demonstrate an impressive tensile modulus of 2830 MPa and a tensile strength of 84 MPa for PBFES55. Additionally, the poly(ether sulfone) unit imparts a relatively high glass transition temperature (Tg), ranging from 36.6 °C for poly(butylene 2,5-furandicarboxylate) to 112.3 °C for PBFES62. Moreover, the complete amorphous film of PBFES exhibits excellent transparency and solvent resistance, making it suitable for applications, such as food packaging materials.
研究领域:
材料科学
·
高分子化学
·
生物基聚合物
·
热工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
INDUSTRIAL CROPS AND PRODUCTS
·
2025
·
IF 6.2
Enwen Liu,Maiquan Chen,Yijuan Chang,Haiqiao Zhang,Zhihui Wu
This study introduces an innovative methodology for the development of sustainable, high-performance building insulation materials via molecular engineering of Cellulose nanofibers/Polybenzoxazine-Polyvinyl alcohol (CNFs/PBZ-PVA) composite foams modified with environmentally friendly protonated Poly(ethyleneimine)-Phytic acid (PEI (H⁺)-PA) ligand. The use of renewable bio-based components and eco-friendly modification processes underscores the material's alignment with circular economy principles. The optimized formulation, characterized by a 2: 1 CNFs/PEI (H⁺)-PA ratio, exhibits exceptional multifunctional properties, including a uniform microporous structure (15–35 μm), remarkable compressive strength (2.77 MPa at 80 % strain), and superior thermal insulation performance (0.0504 W/(m·K)). In addition, the integrated P-N synergistic system substantially enhances flame-retardancy (LOI=37.2 %, UL-94 V-0 rating), achieving reductions in heat release and smoke production by 41.67–81.43 %. Subsequent silane modification further elevates hydrophobicity (contact angle of 114.5°) and fire safety (LOI=39.1 %, 82.74 % reduction in PHRR). The fabricated wood-based insulation panel demonstrates outstanding thermal resistance (surface temperature of 52.8 °C after exposure to 120 °C for 180 s), surpassing the performance of conventional commercial products. This research offers a green materials solution that effectively integrates thermal management, mechanical durability, and fire safety for sustainable building applications.
研究领域:
材料科学
·
高分子科学
·
建筑材料
·
可持续材料
·
消防安全工程
·
热工学
·
纳米技术
·
环境工程
✓ 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）