INDUSTRIAL CROPS AND PRODUCTS
·
2024
·
IF 5.6
Youjie Gao,Chengling Huang,Yi Chen,Xuefei Chen,Yunfei Shen,Hou-Yong Yu
Timber is among the oldest building materials used by humans but natural wood had many disadvantages such as flammability and poor thermal insulation. These properties may affect the safety and durability of buildings continuous timber. There has been a growing interest in developing practical and simple methods for the fabrication of high-performance wood. A cost-efficient and easily scalable approach for the fabrication of nanostructured multifunctional wood with excellent anisotropic, flame retardant, and durability properties has been developed via in-situ CO 2 capture and mineralization. The product has high mineralization rate (39 %), higher strength (45.4 MPa), low thermal conductivity (∼0.13 W/m·K), and a low LOI (39.3 %). Deposition of CaCO 3 in the nano and micro-porous structures of wood not only enhances its insulation against heat but also its ability to resist flames, which is an important performance parameter for applications in building construction. At the same time, the mineralized wood displays excellent durability properties. It is resistant to high temperatures, extreme cold, and prolonged immersion in water. Therefore, in-situ CO 2 capture and mineralization of the wood nano and micro-porous architecture with CaCO 3 may provide a cost-efficient and scalable strategy to fabricate nanostructured multifunctional wood for potential materials in modern buildings.
研究领域:
材料科学
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
ACS Nano
·
2024
·
IF 15.8
Xiaofeng Pan,Xiang Li,Zhongkai Wang,Yonghao Ni,Qinhua Wang
Recently, certain challenges and accompanying drawbacks have emerged in the preparation of high-strength and tough polymer hydrogels. Insights from wood science highlight the role of the intertwined molecular structure of lignin and crystalline cellulose in contributing to wood’s strength. Herein, we immersed prestretched poly(vinyl alcohol) (PVA) polymer hydrogels into a solution of nanosized lignosulfonate sodium (LS), a water-soluble anionic polyelectrolyte, to creatively reconstruct this similar structure at the molecular scale in hydrogels. The nanosized LS effectively fixed and bundled the prestretched PVA polymers while inducing the formation of dense crystalline domains within the polymer matrix. Consequently, the interwoven structure of crystalline PVA and LS conferred good strength to the composite hydrogels, exhibiting a tensile strength of up to ∼23 MPa, a fracture strain of ∼350%, Young’s modulus of ∼17 MPa, toughness of ∼47 MJ/m3, and fracture energy of ∼42 kJ/m2. This hydrogel far outperformed previous hydrogels composed directly of lignin and PVA (tensile strength <1.5 MPa). Additionally, the composite hydrogels demonstrated excellent antifreezing properties (<−80 °C). Notably, the LS-assisted reconstruction technology offers opportunities for the secondary fixation of PVA hydrogel shapes and high-strength welding of hydrogel components. This work introduces an approach for the high-value utilization of LS, a green byproduct of pulp production. LS’s profound biomimetic strategy will be applied in multifunctional hydrogel fields.
研究领域:
材料科学
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木材科学
·
高分子化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
NEW JOURNAL OF CHEMISTRY
·
2025
·
IF 2.5
Qi Wang,Huiyu Yan,Biyang Ling,Wenhua Li,Jianxi Xiao
Skin aging is a pervasive concern that profoundly impacts human well-being and quality of life, while also heightening the risk of skin diseases, including skin cancer. Implants offer a promising treatment option for skin aging, but current implants degrade quickly and have low bioactivity, resulting in reduced therapeutic efficacy. This study introduces a novel injectable, long-lasting, highly bioactive collagen-coated nanoparticle implant for skin rejuvenation. The nanowood, produced through delignification, air-assisted superfine grinding, and sieving, demonstrates excellent injectability. The collagen-coated nanowood implant exhibits remarkable biocompatibility and bioactivity, significantly enhancing the proliferation, adhesion, and migration of human foreskin fibroblast-1 cells. In photoaged mouse skin models, the implant substantially improves dermal density and skin elasticity, creating an environment conducive to fibroblast activity and collagen regeneration. Furthermore, the implant shows excellent biosafety, with no pyrogenic or hemolytic risks. Injectable nanowood implants are a promising approach to skin regeneration with important potential applications in dermatology and tissue engineering.
研究领域:
生物医学工程
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组织工程
·
皮肤病学
✓ 已验证
产品关联
DOI
高影响因子
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
·
2020
·
IF 3.573
Qixuan Lin,Yuhuan Yan,Xinxin Liu,Bei He,Xiaohui Wang,Xiaoying Wang,Chuanfu Liu,Junli Ren
The three-step fractionation strategy of corncob was performed for the efficient production of xylooligosaccharide, nanolignin, and nanocellulose. High yield of xylooligosaccharide (XOS) was produced from corncob through organic acid–NaOH pretreatment. The influences of the type and concentration of organic acids and the amount and time of NaOH added on the XOS yield were investigated. For resource efficiency, the pretreated corncob residue was further soaked in p-toluenesulfonic acid (p-TsOH) at 80 °C to extract lignin, and then the residue after secondary treatment was catalyzed by TEMPO to produce cellulose nanofibers. Results showed that 38.3% of XOS was achieved by formic acid–NaOH pretreatment, and the addition of NaOH at the later stage of the pretreatment process was proved to prevent the excessive hydrolysis of xylan, resulting in the selective depolylmerization of xylan during pretreatment. In addition, the atomic force microscopy (AFM) analysis showed that nanoscale lignin and cellulose were obtained by the subsequent treatment. TEMPO-oxidized cellulose remarkably swelled in water, and the nanocellulose paper with high transparency was successfully prepared.
研究领域:
生物化学
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材料科学
✓ 已验证
DOI
高影响因子
GREEN CHEMISTRY
·
2024
·Vol. 27
·期 1
·133-143
·
IF 9.3
Hongjiao Chen,Kewei Zhang,Yanzhi Xia,Jian Li,Bin Hui
Coupling the urea oxidation reaction (UOR) and hydrogen evolution reaction (HER) in seawater is desirable to produce sustainable and green hydrogen due to the reduced energy consumption. However, developing high-performance UOR/HER electrocatalysts in seawater instead of pure water remains a great challenge. Herein, (B,P,Co,Fe)-Ni anchored on Paulownia Wood (PW) is proposed to enhance the overall urea-(sea)water splitting performance. The resulting sample only needs a potential of 1.34 V to deliver a large current density of 100 mA cm−2 for alkaline UOR and features a remarkable durability to maintain 100 mA cm−2 for 100 h. The HER and UOR (HER||UOR) coupled system in alkaline seawater-urea electrolyte for producing H2 demonstrated a more significantly reduced electrolyzer voltage of 1.67 V obtained at 100 mA cm−2 in comparison to that of the HER||OER system (1.98 V). The well-aligned micro-channels and nanopores in wood frameworks not only improve the hydrophilicity and aerophobicity of the whole electrode, which is conducive to the penetration of the electrolyte and release of bubbles, but also shorten the transmission distance of ions and intermediates to accelerate the reaction kinetic process. Density functional theory calculations reveal that Co, Fe, P and B co-doping in Ni effectively adjusts the electronic structure, and the adsorption/desorption behavior of the urea reaction intermediates is regulated by the synergistic effect from multiple components, resulting in an excellent catalytic activity in seawater-urea media. This work promotes a better understanding of the surface electronic structure modulation of nanowood via doping strategy and offers great potential in the design of advanced UOR/HER catalysts for hydrogen production and urea wastewater treatment.
研究领域:
材料科学
·
电化学
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
COMPOSITES COMMUNICATIONS
·
2020
·
IF 4.915
Weijun Yang,Guochuang Qi,Hui Ding,Pengwu Xu,Weifu Dong,Xiangmiao Zhu,Ting Zheng,Piming Ma
In this work, poly(lactide- ε -caprolactone) copolymer grafted lignin nanoparticles (LNP-g-P(LA-CL) were synthesized, through a ring-open polymerization (ROP) of L-lactide and ε -caprolactone, initiated from the hydroxyl groups on LNP surface. Then PLA , PCL and various amounts of the copolymer were blended via a facile solvent casting approach. Mechanical tests showed that the addition of 6 wt% LNP-g-P(LA-CL) copolymer made a significant contribution to the toughness of PLA/PCL blend, which was enhanced by 4 folds in comparison with neat PLA. Meanwhile, the crystallization ability of both PLA and PCL were improved due to the better interfacial adhesion and mobility of PLA and PCL chains. Well-distributed elongated-fibrils and crazes, observed after tensile measurements for the nanocomposites, were responsible for absorbed energy, improved toughness and flexibility of PLA. Furthermore, UV–Vis spectroscopy measurements showed that the incorporation of 12 wt% of LNP-g-P(LA-CL) copolymer make PLA/PCL film able to shield almost 100 wt% of UV-B and UV-C irradiation. PLA/PCL-LNP nanocomposites can be used as impact resistance materials and in UV-resistance fields, such as sunshade and food packaging areas.
研究领域:
材料科学
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环境科学
✓ 已验证
产品关联
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2022
·
IF 9.136
Lili Zhang,Bihui An,Haojie Chen,Jingjing Chu,Jinxia Ma,Yimin Fan,Zhiguo Wang
Catalytic membrane technology, as a combination of membrane separation and catalysis, is a high-efficiency and feasible route for wastewater remediation. The controllable synthesis of ultrasmall metal nanoparticles on the membrane to maximize the size effect is a challenging task yet. Herein, the filter paper-based botryoidal nanolignin channel stabilized ultrasmall PdNP membrane (Pd@LNP/FP) was prepared by chemical crosslinking of epichlorohydrin (EPI), the nanolignin (LNP) serves as both reducing and capping agent for the in-situ synthesis of ultrasmall PdNP with enhanced active sites. The mean size of PdNP was effectively tuned from 1.76 to 2.09 nm by varying the LNP loading amount of composite membranes. The botryoidal LNP supported on FP also provides the nanoscale channel to keep reactants on active sites of ultrasmall PdNP to improve the catalytic performance of Pd@LNP E /FP. The complete removal of hazardous Cr(VI) required only 2.5 min using Pd@LNP E /FP membrane, the pseudo-first-order rate constant (k) is 1.2725 min −1 , much higher than that of the Pd@LNP p /FP membrane prepared by physical composite (0.2885 min −1 ). Moreover, the rapid filtration-catalysis removal of Cr(VI) can be achieved by twice filtration, demonstrating the high efficiency and feasibility of Pd@LNP E /FP via synergetic filtration enrichment and catalysis reduction.
研究领域:
环境科学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
Journal of Cleaner Production
·
2022
·
IF 11.072
Chuanwei Zhang,Pengfei Zhang,Lianjun Cheng,Jianyong Li,Ranran Jian,Maocheng Ji,Fangyi Li
Wheat straw is a potentially natural material for production of bio-composites due to its chemical composition. Lignin, cellulose and hemicellulose are closely connected in wheat straw and difficult to separate for nano-lignocellulose in high valuable application. The work presented a clean and simple way to prepare biodegradable nano-lignocellulosic membrane with high mechanical strength and water barrier property using nano-lignocellulose derived from wheat straw. Wheat straw was soaked in aqueous solution of urea at 90 °C for 24 h and fibrillated with boiling to obtain urea treated nano-lignocellulose (UNLC). Moreover, starch soluble (SS) latex was mixed with the UNLC slurry for binding the reinforcement for preparing the novel membrane (UNLC/SS). High speed centrifugation realized stratification of the chemical composition from wheat straw. Waxy and lignin as hydrophobic component was located at the surface of the developed membrane, which improved the water barrier property of the membrane. Water contact angle of the lignocellulosic membrane was beyond 110°. The hydrogen bond formation between the starch and cellulose increased the mechanical property of the novel biodegradable membrane. The tensile strength of the nano-lignocellulosic membrane increased from 7.6 MPa to 27.4 MPa. As the high strength, hydrophobic, transparent, biodegradable performance, the bio-composite membrane has many potential industrial applications.
研究领域:
材料科学
·
生物化学
✓ 已验证
DOI
高影响因子
PROCESS SAFETY AND ENVIRONMENTAL PROTECTION
·
2023
·
IF 7.8
Rabia Jalil Khan,Chun Yin Lau,Muhammad Usman Farid,Md Khairul Islam,Alicia Kyoungjin An,Jiang Yi,Shao-Yuan Leu
The application of renewable and functional group-enriched lignin has recently gained massive popularity in wastewater treatment applications. Herein, woody biomass-derived organosolv lignin nanoparticles (LNPs) with uniform colloidal spherical morphology and average particle size (⁓150 nm) were synthesized via a simple and facile anti-solvent nanoprecipitation technique and used for the fabrication of ultrafiltration nanocomposite membrane. Upon the addition of LNPs to polyether sulfone (PES) matrix, the LNPs-impregnated membrane exhibited a thinner surface layer that induced low resistance to water flow, high pore density (83.2 ± 0.9%) with uniformly distributed pores, wider and well-connected internal macrovoids with higher sub-layer porosity, and a higher negative surface charge (−29.8 mV). These structural features hence contributed to high stable permeation flux (92.3 L m −2 h −1 ) and higher removal efficiencies (> 95%) for treating cationic (methylene blue) and anionic (methylene orange) dyes over a wide range of environmentally relevant pH conditions . The electrostatic interactions between the charged membrane surface and dye species revealed the underlying mechanism for higher dye rejection through the PES-LNP membrane. Finally, the structural stability analysis confirmed the complete incorporation/immobilization of LNPs within the PES matrix, making it ready for real-world applications in wastewater treatment.
研究领域:
环境科学
·
材料科学
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
Journal of Cleaner Production
·
2023
·
IF 11.1
Xin Zhao,Zeyu Zhang,Jiuyin Pang,Ling Su
Carbon fiber reinforced composite materials possess the advantages of being lightweight, high strength, and high modulus, making them extensively utilized in various domains including military, livelihood, and aerospace. However, the conventional resin matrix used in composite materials primarily consists of bisphenol A epoxy resin which has drawbacks such as low toughness, exorbitant cost, and environmental and human health hazards. Additionally, traditional bisphenol A epoxy resin is a non-renewable organic chemical raw material that does not melt or dissolve after permanent cross-linking and solidification, thus making degradation very difficult while hindering recyclability . In order to enhance the toughness, degradability , and recyclability of carbon fiber reinforced composite materials herein we synthesized modified nano lignin polyols using alkali lignin as a raw material. The successful synthesis of nano lignin polyols was confirmed through dynamic light scattering (DLS), transmission electron microscopy (TEM), Fourier transform infrared spectroscopy (FT-IR). Subsequently, nano lignin polyol particles were incorporated into the matrix to fabricate a nano lignin polyol-based epoxy resin matrix. Consequently, carbon fiber reinforced nano lignin polyol epoxy resin matrix composite (NFRP) were prepared via vacuum impregnation followed by closed mould sealing and cooling detachment. The results demonstrated that, in comparison with the carbon fiber reinforced composite material (LFRP) prepared using the original lignin-based epoxy resin, NFRP exhibited a remarkable increase of 104.66% in flexural strength and a significant enhancement of 65.23% in flexural modulus , reaching an impressive value of 11.3 GPa. Moreover, the interlayer shear strength (ILSS) reached an exceptional level of 91.17 MPa, surpassing the standard carbon fiber composite materials available on the market. Additionally, NFRP displayed an outstanding tensile strength of 2337.50 MPa, expanding the application range of carbon fiber reinforced composite materials while reducing material damage rates and increasing their service life span. Notably, NFRP achieved an impact toughness value as high as 142.60 kJ/m 2 , which is equivalent to 184% of popular epoxy resin matrix EFRP found on the market today. These findings provide novel insights and methodologies for applications requiring higher toughness and strength requirements in composite materials while also paving new avenues for degradable recovery approaches for carbon fiber reinforced composite materials.
研究领域:
材料科学
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
INDUSTRIAL CROPS AND PRODUCTS
·
2018
·
IF 3.849
Yipeng Chen,Baokang Dang,Chunde Jin,Bo Chen,Qingfeng Sun,Yujing Nie
Inspired by the borate cross-linking used by higher plants to strengthen their intercellular structure, high mechanical strength-layered composites based on borate cross-linked nanolignocellulose/graphene-oxide platelets were developed. Borate treatment and graphene deposition on nanolignocellulose surface were carried out by a mechanochemical method. The borate content is used in very low in these composites. The orderly layered structures produced by the flow-directed assembly of individual nanolignocellulose/graphene oxide platelets resulted in a synergistic toughening effect. The bending strength and elasticity modulus of the produced composites were ∼1.5 times higher than those of pure nanolignocellulose; they were also superior to those of lignin-based materials and comparable to those of medium density fiberboard (MDF) with resin. Such high-strength layered composites have potential as load-bearing materials in structural applications.
研究领域:
材料科学
·
生物启发材料
·
纳米技术
✓ 已验证
产品关联
DOI
高影响因子
APPLIED THERMAL ENGINEERING
·
2023
·
IF 6.4
Zhijing Li,Dakai Chen,Huan Gao,Huaqing Xie,Wei Yu
Solar-driven interfacial evaporation (SDIE) is considered one of the most promising technological approaches to solve the freshwater shortages. Based on renewable wood, we fabricated the nanowood loaded with reduced graphene oxide (RGO@Nanowood) with high SDIE performance. Its superior performance benefits from three aspects: Firstly, the cellulose network in nanowood treated by delignification contains many hydrophilic groups, which significantly improves the hydrophilicity and can combine with water molecules through hydrogen bonds to generate more activated water, thereby reducing the enthalpy of evaporation. Secondly, the photothermal conversion capability of RGO@Nanowood was significantly improved by loading RGO with an impregnation-reduction method. Finally, the 2D water supply strategy achieves an ideal balance of water transport and thermal management and controls the water content within the pore channels to expose more evaporation space. Under simulated sunlight (1.0 kW m −2 ), the evaporation rate and evaporation efficiency of RGO@Nanowood were 2.26 kg m −2 h −1 and 92.71 %, respectively. In the outdoor experiment, the daily freshwater production of 6.39 kg m −2 was obtained on sunny days. Furthermore, the hydroelectric effect of RGO@Nanowood under solar-driven evaporation proved its potential for power generation applications.
研究领域:
材料科学
·
能源技术
·
环境科学
✓ 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）