CHEMICAL ENGINEERING JOURNAL
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2022
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IF 16.744
Boqiang Gao,Koukou Tao,Zhonghua Xi,Mayyada M.H. El-Sayed,Tamer Shoeib,Hu Yang
In this work, a 3D lignosulfonate composited poly(vinyl formal) (PVF) sponge impregnated by BiVO 4 /polyaniline (PANI)/Ag ternary photocatalyst (PLS-BiVO 4 /PANI/Ag) was designed and fabricated. The synergistic adsorption-photodegradation of five fluoroquinolones (FQs) antibiotics onto PLS-BiVO 4 /PANI/Ag was investigated. Incorporating lignosulfonate as a carrier on PVF sponge improved its structural properties and enhanced its adsorption performance toward FQs. The BiVO 4 /PANI/Ag ternary photocatalyst was well-dispersed and tightly bound to the composited sponge, thus it efficiently degraded the adsorbed FQs through surface photodegradation. PLS-BiVO 4 /PANI/Ag achieved >90% removal efficiency for all examined FQs within 2.0 h in a batch system, while it maintained a steady 80% removal efficiency for 30.0 h in a continuous dynamic treatment system. Photoelectric characterizations and ESR results showed that BiVO 4 /PANI/Ag was consistent with the type II heterostructure and effectively improved the utilization of visible light and the separation of photogenerated electron-hole pairs. The hole was the dominant active species in the degradation of FQs, while the main degradation pathways included defluorination, decarboxylation and destruction of piperazine ring. The prepared composited sponge is thus characterized by its high performance, convenient operation, eco-friendliness, and practicality in real water treatment systems since it undergoes self-purification and is easily recovered from water without mass loss.
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JOURNAL OF WOOD CHEMISTRY AND TECHNOLOGY
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2020
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IF 1.899
Kaushik Nath,Suresh C. Panchani,Tejal M. Patel,Haresh K. Dave,Vinay B. Patel,Kamlesh K. Tiwari,Narottam Sahoo
Chopped stems of Prosopis juliflora, an invasive xerophyte, were digested in a laboratory digester following alkaline sulfite pulping process to generate spent liquor whereby lignin underwent sulfonation to produce sodium lignosulfonate (SLS). SLS was concentrated from the spent liquor by ultrafiltration. Raw wood was featured by high lignin (23.5%), low extractives (1.0%), low wax (0.41), and low ash (2.25%) content thus making it an ideal feedstock to produce lignosulfonates with appreciable physico-chemical property and relatively high mechanical strength. Attempts were made to provide basic information on SLS structure and structural changes that might occur during pulping of P. juliflora under the present experimental conditions. Spectral and X-ray diffraction studies on as-produced SLS revealed substantial depolymerization and structural modification of lignin during sulfite pulping. The derived SLS had higher crystallinity index than the feedstock wood. Effect of average size of raw wood chip and dose of sodium sulfite in the overall yield of pulp and SLS along with the kappa number of the pulp were also analyzed. Findings from this study would serve to cultivate a better understanding of the potential of P. juliflora as a feedstock, so far unexplored, to produce SLS − a value-added product with numerous commercial applications. The use of this particular plant species in paper and pulp industry could also be considered as an effective means of integrated agro management in rural areas.
研究领域:
制浆造纸技术
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木质素化学
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可再生生物质利用
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废弃物高值化
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材料科学
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COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
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2022
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IF 5.518
Wen-Juan Yan,Sheng Xu,Xian-Yao Tian,Jun-Jie Min,Shu-Cen Liu,Chi-Jie Ding,Nai-Liang Wang,Yan Hu,Qi-Xun Fan,Jiang-Shuo Li,Hong-Yan Zeng
In this paper, a functionalized layered double hydroxide (LDH-LS@Ni(OH) 2 ) flame retardant was designed and fabricated based on a multi-modifier system consisting of lignosulfonate (LS) and Ni(OH) 2 and used as a novel flame retardant for polypropylene (PP). In this multi-modifier system, LS as a compatibilizer and charring agent to improve compatibility and char yield, and Ni(OH) 2 was utilized to improve the graphitization of char residual, resulting in a PP/LDH-LS@Ni(OH) 2 composite with higher thermal stability. With the addition of LDH-LS@Ni(OH) 2 was only 15 wt%, the PP/LDH-LS@Ni(OH) 2 composite achieved a limiting oxygen index (LOI) of 30.8% and passed the UL-94 V-0 rating. At the same time, the peak heat release rate (PHRR), total heat release (THR), and total smoke production (TSP) were significantly reduced by 62.7%, 29.5%, and 46.2%, respectively. The flame retardant properties of LDH-LS@Ni(OH) 2 were mainly due to the catalytic charring effect of the transition metal elements and the physical barrier effect of the hydrotalcite. More specifically, as a highly efficient flame retardant, LDH-LS@Ni(OH) 2 has promising potential in reducing the fire hazards of PP composites.
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POLYMER DEGRADATION AND STABILITY
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2020
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IF 4.032
Ping Li,Chang Liu,Ying-Jun Xu,Zhi-Ming Jiang,Yun Liu,Ping Zhu
Bio-based materials have been noticed for the continuous environmental pollution and resource shortage. In this paper, lignosulfonate (LS) and chitosan (CS) were selected to be flame-retardants. In the vertical flame test (VFT), LS/cotton-17.1 wt%, CS/LS/cotton-17.0 wt%, and CS/LS/cotton-25.2 wt% obtained lower afterflame times than that of uncoated cotton fabrics, while LS/cotton-17.1 wt% had serious afterglow time of 70 s. However, the afterglow time of CS/LS/cotton-25.2 wt% was 11 s, which decreased owing to the increased amount of CS. LS/cotton-17.1 wt%, CS/LS/cotton-17.0 wt%, and CS/LS/cotton-25.2 wt% presented limiting oxygen index values of 24.7%, 25.0%, and 26.0%, respectively. The scanning electron microscope images of char residues after the VFT showed that CS and LS formed an intumescent flame-retardant system, and cotton fibers remained intact structure. Meanwhile, the results of thermogravimetric analysis suggested that flame-retardant cotton fabrics can generate stable char residues. In N 2 atmosphere, CS/LS/cotton-25.2 wt% generated 27.1% stable char residues. Moreover, the addition of CS/LS decreased the heat release rate and total heat release values and this system performed well in smoke suppression. The flame-retardant mechanism of the system might belong to gas-phased because more non-combustible products were generated in the thermal degradation process.
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CHEMICAL ENGINEERING JOURNAL
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2024
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IF 13.3
Han Lu,Hongtao Zhu,Junhuang Xu,Xuejun Lai,Xingrong Zeng,Hongqiang Li
The rapid growth of wearable electronics, healthcare monitoring, and human–computer interaction has sparked growing interest in flexible piezoresistive pressure sensors, which in turn raised considerable concerns about the increasingly serious environmental pollution caused by electronic waste. Herein, a radial inward directional freezing-drying method was proposed to prepare biobased, degradable and directional porous carboxymethyl chitosan/lignosulfonate sodium aerogel with dual-conductive network constructed by carboxylated multiwalled carbon nanotubes (C-CNTs) and MXene for piezoresistive pressure sensor. Owing to the synergistic conductive network of C-CNTs and MXene as well as directional porous structure, the sensor exhibited high sensitivity (2.33 kPa −1 in 0–10 kPa, 1.04 kPa −1 in 10–31 kPa, 0.53 kPa −1 in 31–53 kPa), fast response (response/recovery time of 140/60 ms), and excellent repeatability (2,000 loading–unloading cycles). Moreover, the sensor was successfully applied for human motion detection, healthy monitoring, micro-expression identification, and speech recognition. In addition, the aerogel for sensor was able to be completely degraded within 70 h in 1 M hydrochloric acid solution or partially degraded in boiling water within 2.5 h for the recycling of conductive materials, which was beneficial for not only environment protection but also saving resource. Our findings conceivably stand out as a new strategy to prepare environmentally friendly and high-performance piezoresistive pressure sensor and will promote the further development and application of flexible electronics.
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INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
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2024
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IF 7.7
Jinbang Han,Xiuzhong Zhu,Li Tian,Naishuo Yan,Haitao Zhang,Lei Wang
The advancement of bio-based materials derived from renewable resources provides a pivotal strategic approach to address the problems of environmental pollution and scarce fossil resources. In this study, a series of bio-based waterborne polyurethanes (WPUs) with enhanced UV resistance, photothermal effect and corrosion resistance were prepared by using sorbitan monooleate (SP) and castor oil (CO) as vegetable polyols together with the introduction of sodium lignosulfonate modified of diethanolamine (DML). The WPU coatings of only 100 μm thickness, exhibited UV blocking rate > 99 % between 200 and 320 nm. Furthermore, the synthesized WPUs had superior adhesion to aluminum, tinplate, and PVC surface, with adhesion to tinplate of up to 5B and hardness of up to 3H. Additionally, the WPU coatings showed favorable photothermal effect when exposed to 1.05 W/cm 2 of near-infrared light irradiation, with maximum surface temperature of 93 °C. The WPU coatings demonstrated noteworthy corrosion protection, with high corrosion protection efficiency of 96.97 % on tinplate. This study presents a new strategy for the synthesis of bio-based WPUs with excellent ultraviolet resistance, favorable photothermal effect, corrosion protection, and degradability. The unique properties lay the foundation for the applications of bio-based WPUs in the field of industrial coatings.
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PubMed
高影响因子
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
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2025
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IF 8.5
Tianyu Fang,Chunting Guo,Yang Li,Dejian Zhang,Huilai Sun,Yong Wan,Caixia Qi
A corrosion and wear resistant coating was developed on the surface of titanium alloy using micro-arc oxidation (MAO) technology with addition of lignin sulfonate (SLS) as an additive in electrolytes containing 15 g/L of Na 2 SiO 3 ·9H 2 O and 10 g/L of Na 3 PO 4 ·12H 2 O. The effects of concentration of SLS on the surface morphology, microstructure, and corrosion-wear performance of the MAO coatings were systematically investigated. Wetting properties and mechanical characteristics of MAO coatings were determined by contact angle measurements, microhardness testing, and bonding strength assessments. The corrosion resistance of the MAO coating in artificial saliva media was assessed through electrochemical testing, while its tribological and corrosion-wear performance was evaluated via dry friction tests and corrosion-wear tests, respectively. Experimental results indicate that the incorporation of lignin sulfonate as the electrolyte additive enhances pore filling within the coating matrix while improving both mechanical properties and corrosion resistance. Notably, MAO coatings with a concentration of 1 g/L exhibited superior mechanical properties; furthermore, their corrosion current density decreased by one to three orders of magnitude compared to that of the TC4 substrate.
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INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
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2025
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IF 8.5
Jingren Ma,Weisheng Yang,Junfeng Chen,Yihui Zhou,Mingqiang Ye,Xinwu Xu,Huining Xiao,Jingquan Han
Stretchable and resilient conductive hydrogels, incorporating flowable liquid metals (LM) into polyvinyl alcohol (PVA), have emerged as promising materials for wearable sensors due to their exceptional mechanical properties and sustainability. However, the fluidity and compatibility of LM with the hydrogel matrix limit the construction and performance of LM/PVA conductive hydrogels. This study aimed to develop a flexible, high-performance hydrogel for advanced wearable sensors by introducing LM nanoparticles encapsulated in sodium lignosulfonate (LS-LM) into the PVA matrix. The renewable natural macromolecule LS, rich in functional groups, enhanced the compatibility between LM and the PVA matrix. Moreover, LS formed a stable shell around the LM droplets, preventing rupture and leakage of LM, ensuring uniform dispersion within the hydrogel and significantly improving its durability by preventing phase separation. The optimized conductive lignosulfonate-liquid metal/polyvinyl alcohol hydrogel (LS-LM/PVA) exhibited a tensile stress of 1.60 MPa, a compressive strength of 0.53 MPa under 70 % strain, and electrical conductivity (4.87 S m −1 ). The hydrogel-based sensor demonstrated excellent sensitivity (GF = 2.40) and outstanding fatigue resistance (over 500 cycles). A Life Cycle Assessment (LCA) was conducted to evaluate the environmental impacts of LS-LM/PVA hydrogel production. The composite hydrogel-based sensor shows significant promise for advancing human motion tracking and information recognition.
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PEST MANAGEMENT SCIENCE
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2024
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IF 3.8
Lingling Huang,Guangqi Jiang
BACKGROUND Widespread application of controlled-release pesticide delivery systems is a feasible and effective method to improve the utilization efficiency of pesticides. However, owing to the high cost and complicated preparation technologies of controlled-release pesticide delivery systems, their applications in agricultural production have been seriously hindered. RESULTS This study aimed to construct inexpensive photothermally controlled-release pesticide delivery systems using chitosan (CS) and sodium lignosulfonate (LS) as the wall materials, and a coordination assembly strategy of LS with transition metal ions to encapsulate a model pesticide, avermectin (AVM). The resulting complex or nanoparticle photothermal layers in these systems effectively achieved photothermal conversions, and replaced the use of common photothermal agents. In the prepared pesticide-delivery systems, two systems had remarkable photothermal conversion performance and photothermal stabilities with a photothermal conversion efficiency ( η ) of 24.03% and 28.82%, respectively, under 808 nm, 2 W near-infrared irradiation. The slow-release and ultraviolet-shielding performance of these two systems were markedly enhanced compared with other formulations. The insecticidal activities of these two systems against Plutella xylostella under irradiation with light-emitting diode (LED)-simulated sunlight were also enhanced by 5.20- and 5.06-fold, respectively, compared with that without irradiation of LED-simulated sunlight. CONCLUSION Because of their convenient preparations, inexpensive and renewable raw materials, and excellent photothermally controlled-release performance, these on-demand pesticide delivery systems might have significant potential in improving the utilization efficiency of pesticides in modern agriculture. © 2024 Society of Chemical Industry.
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PubMed
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CARBOHYDRATE POLYMERS
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2025
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IF 12.5
Boyu Tang,Tao Xu,Qingyun Li,Jiayu Tu,Kang Liu,Haiyin Xu,Xiaoling Wang,Yihui Zhou,Gang Yu,Shuang-Feng Yin
Antibiotic and heavy metal contamination in livestock wastewater poses escalating environmental challenges, while conventional adsorption methods are hindered by low efficiency, poor reusability, and potential secondary pollution. In this study, a sustainable sodium lignosulfonate/chitosan/polyvinyl alcohol/poly(acrylic acid) (SLS/CS/PVA/PAA) hydrogel was synthesized by free-radical polymerization using chitosan that had been functionally enhanced with sodium lignosulfonate. The experimental results showed that the hydrogel exhibited high adsorption capacities for levofloxacin (LEV) and Cu 2+ , reaching 1146.73 mg·g −1 and 70.6 mg·g −1 , respectively. The adsorption mechanisms were elucidated through kinetic and isothermal models, fourier transform infrared spectroscopy (FTIR), X-ray photoelectron spectroscopy (XPS). The density functional theory (DFT) calculations reveal that the key binding sites involve -OH and -NH 2 groups of CS and -COOH and -SO 3 H groups. Synergistic interactions between LEV and Cu 2+ , including ion bridging and complexation, significantly enhanced LEV removal. The molecular dynamics simulation confirm that Cu 2+ modulates surface charge via -SO 3 − binding and enhances LEV adsorption through ionic bridging. Moreover, copper recovery was achieved by combustion with a recovery rate of 77.31 ± 1.3 %. This study offers a green and cost-effective strategy for pollutant removal and metal recovery, highlighting the potential of SLS-functionalized chitosan hydrogels in environmental remediation.
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高影响因子
Arabian Journal of Chemistry
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2022
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IF 6.212
Peipei Wang,Qingcheng Wang,Tian Liu,Jiaqi Guo,Yongcan Jin,Huining Xiao,Junlong Song
Bovine serum albumin (BSA), polyethylene glycol (PEG) and lignosulfonate (LS) have been extensively employed as synergistic agents in lignocellulose saccharification. Nevertheless, the promoting mechanisms have not been fully understood and there are a number of controversial opinions existed. All attention has been paid to the interactions between respective additive and substrate. However, rarely attention has been paid to the interactions between additives and enzymes (cellulase from Trichoderma reesei in this investigation). This interaction is actually more important since cellulase interacts with the additives before it contacts with substrate. Therein, Quartz crystal microbalance with dissipation monitoring (QCM-D), surface plasma resonance (SPR) and small angel X-ray scattering (SAXS) were incorporated to study the interaction between enzyme and additives. The results showed synergistic agents have different interaction modes with cellulase. BSA and LS can form complexes with cellulase and the formed complexes prevent them from nonproductive binding by residue lignin; what’s more, the cellulase-BSA complexes improve the hydrolytic capability of pristine enzyme whereas cellulase-LS complexes reduce. PEG prevents the unproductive binding of cellulase to the residual lignin by forming a thin layer that actually acts as a steric hindrance to the residual lignin. This investigation helps us to understand the sophisticated interactions among the components in the complicated enzymatic system, especially the interactions between enzymes and synergistic agents. It will be helpful in the design and utilization of synergistic additives in the lignocellulose biorefinery process as well.
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INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
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2026
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IF 8.7
Hongwei Ren,Zhaoyi Lv,Degang Xu,Xiaolong Zhang,Congyuan Li,Jifeng Zhang
Epoxy resin (EP) is widely used in various fields due to its excellent adhesion, mechanical strength, chemical resistance, and electrical insulation. However, its low limiting oxygen index (18) makes it highly flammable and generates toxic fumes during combustion, presenting significant fire risks. Consequently, it is crucial to modify epoxy resins to be flame retardant. Bio-based carbon nanomaterial flame retardants offer the advantages of high flame retardant efficiency and balanced performance, providing a novel approach to addressing this issue. This study innovatively develops a bio-based flame retardant through a nitrogen‑silicon synergistic doping strategy, using tetrazole (Tet), tetraethyl orthosilicate (Teos), and glycerol (Gly) as raw materials to synthesize N Si co-doped carbon quantum dots (N-Si-CQDs) via a one-step hydrothermal method. The obtained N-Si-CQDs were further combined with sodium lignosulfonate (Sodi) to prepare N-Si-CQDs/Sodi@EP composites. The composite exhibits remarkable flame retardancy: a limiting oxygen index of 29%, a UL-94 V-0 rating, and significantly enhanced char residue. Peak heat release rate and total smoke production are reduced by 33% and 28%, respectively. The fire growth index decreases by 56%, while the fire performance index increases by 160%. Mechanism analysis confirms that the system acts synergistically in both gaseous and condensed phases - forming a protective char barrier and neutralizing free radicals. This work offers a novel strategy for designing high-performance EP composites.
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危险品化学品经营许可证（带存储）