INDUSTRIAL CROPS AND PRODUCTS
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2022
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IF 6.449
Min Guan,Xingye An,Hao Zhang,Guihua Yang,Zhongjian Tian,Shuangxi Nie,Liqin Liu,Zhengbai Cheng,Haibing Cao,Hongbin Liu
Global liquid packaging industry has been greatly spurred by the rapidly growing food & beverage industry all over the world. Liquid packaging board (LPB), as the main composition (75–80 %) of laminated liquid packaging cartons, must possess high-quality of hydrophobicity and physical properties for excellent leak-proof and protecting the packaged commodity. Herein, in this study, lignin is selected to prepare lignin cationic surfactant (LCS) by quaternary ammonium modification. Then cationic lignin modified rosin size ( L -CDRS) with uniform microsphere structure and high colloidal stability is successfully synthesized via a phase inversion process to improve the sizing performance and mechanical properties of LPB. The cation modified LCS presents improved amphipathicity of rich cationic charges and hydrophobic benzene ring skeleton, thus enhancing the electrostatic interactions between LCS and pulp fibers and improving the sizing performance of L -CDRS. The sizing performance of LPB is evaluated by varying the LCS dosages within L -CDRS and concluded that the edge penetration value and Cobb value of LPB handsheets exhibit an improved size performance with 2 % LCS within L -CDRS, implying the formation of homogeneous hydrophobic surface layer induced by the well-distribution of L -CDRS. In addition, the tensile index of LPB increased from 19.74 N·m/g to 25.96 N·m/g assisted by 2 % LCS emulsified L -CDRS, indicating an improved mechanical property. This study puts forward a practical and facile strategy to improve the sizing performance and mechanical properties facilitated by lignin enhanced rosin size and will further broaden the application range of traditional rosin size and lignin in LPB products.
研究领域:
造纸工程
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高分子材料
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表面化学
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生物质利用
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包装材料
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INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
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2026
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IF 8.7
Wenye Xue,Minting Liang,Xueqing Qiu,Jingyi Zeng,Jiayi Zheng,Liheng Chen
Diethylamino hydroxybenzoyl hexyl benzoate (DHHB) is a high-performance UVA absorber widely used to protect skin from ultraviolet radiation. However, its application is hindered by several limitations with insufficient photostability, a narrow UV absorption range, and high skin permeability. To address these challenges, we prepared alkali lignin-encapsulated DHHB nanoparticles (AL/DHHB) by using an environmentally friendly ethanol/water system through a simple solvent-antisolvent method. The effects of ethanol/water ratio, dripping speed, and lignin/DHHB ratio on the structure and properties of the nanoparticles were systematically investigated. The sun protection performance, photostability, and permeability of AL/DHHB nanoparticles were explored. The resulting AL/DHHB nanoparticles demonstrated broad-spectrum ultraviolet protection, with initial sun protection factor of 38.5. Furthermore, it exhibited excellent photostability, maintaining functionality for up to 10.5 h under continuous ultraviolet radiation exposure, and significantly reduced the skin penetration risk of DHHB. This study provides a promising strategy and practical foundation for developing high-performance, safe, and eco-friendly bio-based sunscreen products.
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CARBOHYDRATE POLYMERS
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2023
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IF 11.2
Jing Luo,Yihui Gu,Yufeng Yuan,Wenjuan Wu,Yongcan Jin,Bo Jiang
As a natural green polymer, chitosan is a promising material for plastic replacement. However, the mutually exclusive strength and toughness severely limit its commercial application, and the improved strength of chitosan-based materials is typically achieved at the expense of elongation or toughness. Herein, inspired by the existed multiple non-covalent interactions in biosynthesized fibers, we successfully fabricated a high-performance lignin/chitosan composite film by constructing sacrificial conjoined-network (hydrogen bonds, electrostatic interaction , etc.), which results in an impressive enhancement in tensile strength (50.2 MPa), elongation (73.6 %), and toughness (2.7 MJ/m 3 ) simultaneously, much superior to the pure chitosan film. In addition, the composite film also demonstrates excellent UV resistance, thermal stability , low oxygen permeability (3.9 cm 3 /(m 2 ·24h‧0.1 MPa)) and food preservation (with no negligible change for grape, apple, and cherry tomato after 5–10 days). Such developed lignin/chitosan with both components from biomass represents a promising alternative for plastic replacement.
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POLYMERS FOR ADVANCED TECHNOLOGIES
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2023
·Vol. 34
·期 6
·2010-2028
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IF 3.4
Chunyu Xu,Fuliang Meng,Yuan Qin,Yimiao Zhang,Zhenguo Hu,Yufei Jia,Xinhua Yuan
Replacing petroleum-based raw materials with renewable materials is now obviously more in line with the needs of sustainable development. In this work, lignin, tung oil and linseed oil were selected to prepare tung oil modified lignin based phenolic resin (T-LPF) and linseed oil modified lignin based phenolic resin (L-LPF). T-LPF and L-LPF were characterized by FTIR, DSC, DMA, TGA, universal testing machine, SEM, friction and wear tester and 3D profilometer. The results show that compared with PF and LPF, the introduction of tung oil and linseed oil can reduce the curing activity and increase the curing peak temperature. The modified T-LPF and L-LPF have better thermal stability and mechanical properties. Compared with PF and LPF, the tensile strength of T-LPF is increased by 33.4% and 41.75%, while the flexural strength is increased by 26.86% and 38.27% with the flexural strain increased by 68.97% and 91.41%. The tensile strength of L-LPF is increased by 21.18% and 28.76%, while the bending strength is increased by 10.86% and 20.84% with the bending strain increased by 52.41% and 72.66%. T-LPF and L-LPF have better wear resistance than PF. They can be potentially used as resin matrix of high-performance composites and friction composites.
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ENVIRONMENTAL TECHNOLOGY
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2023
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IF 2.8
Minghao Zhou,Lei Zhong,Lihong Hu,Yonghong Zhou,Xiaohui Yang
To improve the flame retardancy of phenolic foam from the perspective of sustainable development, it is a feasible way to add bio-based flame retardants into phenolic foam. Lignin has a similar structure to phenol, which provides a possibility to replace part of phenol. In this paper, we prepared a kind of reactive bio-based flame retardant based on enzymatic hydrolyzed lignin, in which side chain was chemically grafted with phosphorus and nitrogen and benzene ring would participate in the phenolic condensation reaction. According to elemental analysis and ICP-OES data, the content of nitrogen and phosphorus in modified lignin (NP-L) increased to 2.95% and 3.55% respectively. Compared with original lignin, the carbon residue rate of NP-L increased from 3.25% to 12.13% because of the presence of flame retardant elements N and P. Then lignin-based flame retardant was used to replace phenol for modifying phenolic foams (NPLPFX). The limited oxygen index (LOI) and compressive strength of phenolic foam were improved effectively by adding modified lignin when the substitution rate was less than 25%. The LOI and compressive strength of the modified phenolic foam with 5% replacement amount (NPLPF5) are 55.6% and 0.24 MPa, which increased by 88% and 60% compared with pure phenolic foam. The cone calorimetric data also showed that NPLPF5 had good flame retardancy, and the peak heat release rate and total heat release were significantly lower than PF. This work suggests a novel green strategy for improving the flame retardancy performance of phenolic foam and promoting the utilization of lignin.
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CHEMICAL ENGINEERING SCIENCE
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2023
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IF 4.7
Ying Gao,Hongwei Ma,Yinan Rao,Kaiqi Lv,Fenghao Shu,Jinxing Long
Lignin is a promising renewable starting material for various value-added petrochemicals and high-quality fuels. However, current techniques for utilization of this natural aromatic biopolymer are challenging by the poor selectivity of desired products and the serious char formation. In this study, we provide a novel and efficient approach for selective hydrogenolysis of lignin using the cost-effective catalyst of Ni 3 Fe 1 nanoparticles supported on zirconium phosphates. 77.0 % of lignin is converted, yielding 19.6 % monophenols, whereas, the formation of biochar is insignificant (1.7 %) at the conditions of 260 °C for 5 h in a 2.0 MPa hydrogen. Importantly, 42.1 % of these obtained monophenols are identified to be a versatile bulk chemical of para ethyl phenol (yield of 8.2 %), because of the selective cleavage of the p -coumaryl units of the lignin. The results of catalyst characterization further reveal that the formation of Ni 3 Fe 1 nanoparticle facilitates the breakage of the specific structure of lignin and suppresses the phenolic oligomer's recondensation, which consequently enhance the lignin hydrogenolysis and char inhibition. These insights unveil that the production of bulk chemicals from sustainable resources is realizable through the rational design of catalytic processes, which substantially increase the economic feasibility of biomass biorefinery.
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MOLECULES
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2023
·Vol. 28
·期 8
·3306
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IF 4.6
Shangzhong Zhang,Yi Duan,Changchang Teng,Hongdong Quan,Xiuguo Yang,Hongyan Li,Xiaohe Li,Lifeng Yan
The conversion of lignocellulose into valuable chemicals has been recognized as the key technology in green chemistry. However, selective degradation of hemicellulose and cellulose with the production of lignin is still a challenge. Therefore, a two-step process has been developed to degrade corncob into xylose and glucose under mild conditions. At first, the corncob was treated with the lower concentration of zinc chloride aqueous solution (30–55 w%) at 95 °C with a short reaction time (8–12 min) and 30.4 w% (selectivity = 89%) of xylose obtained with a solid residue of the composite of cellulose and lignin. Next, the solid residue was treated with a high concentration of zinc chloride aqueous solution (65–85 w%) at 95 °C for about 10 min, and 29.4 w% (selectivity = 92%) of glucose can be obtained. Combining the two steps, the total yield of xylose is 97%, while glucose is 95%. In addition, high pure lignin can be obtained simultaneously, which was confirmed using HSQC studies. Furthermore, for the solid residue of the first-step reaction, a ternary deep eutectic solvent (DES) (choline chloride/oxalic acid/1,4-butanediol, ChCl/OA/BD) has been used to separate the cellulose and lignin efficiently, and high-quality cellulose (Re-C) and lignin (Re-L) were obtained. Furthermore, it provides a simple method to disassemble the lignocellulose for monosaccharides, lignin, and cellulose.Keywords:lignocellulose;corncob;glucose;xylose;lignin
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INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
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2023
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IF 8.2
Minwen Jiang,Yanmei Ma,Tong Wang,Na Niu,Ligang Chen
Hybrid lignin (HL) particles were synthesized by compounding lignosulfonate and carboxylated chitosan through a simple ionic cross-linking method, and modifying by polyvinylpolyamine. Due to the synergistic effect of recombination and modification, the material exhibits excellent adsorption performance for anionic dyes in water. The structural characteristics and adsorptive behavior were systematically investigated. The pseudo-second-order kinetic model and the Langmuir model were revealed to well describe the sorption procedure of HL for anionic dyes. The results exhibited that the sorption capacities of HL on sodium indigo disulfonate and tartrazine were 1099.01 mg/g and 436.68 mg/g, respectively. Simultaneously, the adsorbent behaved no significant adsorption capacity loss after five adsorption-desorption cycles, indicating its superb stability and recyclability. Additionally, the HL exhibited excellent selective adsorption of anionic dyes form binary dye adsorption systems. The interaction forces between adsorbent and dye molecules, such as hydrogen bonding, π-π stacking, electrostatic attraction and cation bonding bridge, are discussed in detail. The facile preparation process and superior dyes removal performance of HL were considered a potential adsorbent to remove anionic dyes from wastewater.
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ACS Sustainable Chemistry & Engineering
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2023
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IF 8.4
Shan Jiang,Xiuyu Liu,Zehai Wang,Lin Zhou,Zhiqian Meng,Xinyi Wang,Guoning Chen,Shuangfei Wang,Yan Jiang
Lignocellulose nanopaper (LNP) assembled from lignocellulose nanofibrils (LCNFs) is an emerging eco-friendly structural material applicable to a variety of fields. Lignin serves as a crucial functional component in the LNP matrix; however, it negatively affects the interfacial hydrogen-bonding behaviors among LCNFs and consequently the inferior mechanical performance of LNP. In this study, a mild ozone-oxidation strategy was used to modify lignin macromolecules in situ without significant degradation of carbohydrate polymers (i.e., cellulose and hemicellulose) in LCNFs whereupon the interfacial hydrogen-bond energy was dramatically improved in the assembly and deformation process of LNP as validated by molecular dynamics simulation. Consequently, the lignin-modified LNP exhibited significantly enhanced tensile strength (from 83 to 140 MPa) and toughness (from 1.9 to 7.1 J/m3), which even surpassed those of conventional cellulose nanopaper. Benefiting from the well-preserved lignocellulosic structure, lignin-modified LNP maintained its inherent favorable water and thermal stability and intriguing optical performance, which supported our developed LNP to be a multifunctional structural material for diversified fields, for example, flexible electronic applications. Additionally, the estimated production cost for our developed LNP was approximately half of that for conventional cellulose nanopaper due to its significantly lower resource inputs such as the material, water, and energy. Overall, our study provides a site-specific macromolecular modulation strategy for the economically and environmentally feasible fabrication of high-performance lignocellulosic nanomaterials toward advanced structural applications.
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LANGMUIR
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2023
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IF 3.9
Yaozong Li,Yingying Peng,Yang Hu,Jian Liu,Teng Yuan,Wuyi Zhou,Xianming Dong,Chaoyang Wang,Bernard P. Binks,Zhuohong Yang
Poly(ε-caprolactone) (PCL)-incorporated lignin-chitosan biomass-based nanocomposite porous scaffolds have been effectively prepared by templating oil-in-water Pickering high internal phase emulsions (HIPEs). PCL is dissolved in oil and chitosan and lignin nanoparticles originate in water. The continuous phase of the emulsions is gelled by cross-linking of chitosan with genipin and then freeze-dried to obtain porous scaffolds. The resulting scaffolds display interconnected and tunable pore structures. An increase in PCL content increases the mechanical strength and greatly reduces the water absorption capacity of the scaffolds. Scaffolds loaded with the anti-bacterial drug enrofloxacin show a slow drug release profile, adjustable release rate, and favorable long-term anti-bacterial activity. Moreover, Pickering emulsion templates with suitable viscosity are used as 3D printing inks to construct porous scaffolds with personalized geometry. The results imply that the simplicity and versatility of the technique of combining freeze-drying with Pickering HIPE templates is a promising approach to fabricate hydrophobic biopolymer-incorporated biomass-based nanocomposite porous scaffolds for biomedical applications.
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JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY
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2022
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IF 5.895
Xinyi Xie,Canxin Li,Di Fan,Jian Zhong,Qiyu Liu,Xueqing Qiu,Xinping Ouyang
Traditional pretreatment of lignocellulose is usually conducted under higher acidic and high temperature conditions, which leads to both the degradation of sugar and the condensation of lignin, hindering the subsequent conversion. An effective approach to fractionate lignocellulose into 93.9% of noncondensed lignin, 99.4% of cellulose, 17.8% of xylose, and 66.7% of xylooligosaccharides under mild conditions was developed using the formic acid solution at 80 °C for 100 min. The β-O-4 bond content of lignin fractionated with formic acid (54.6 per 100 C9 units) was higher than dioxasolv lignin (48.4 per 100 C9 units), indicating that formic acid pretreatment well protected the ether bonds in lignin. Therefore, the hydrogenolysis of fractionated lignin contributed to 28.0% of aromatic monomer yield, which was comparable to dioxasolv lignin. As cellulose possesses a large amount of porosity because lignin was separated from lignocellulose, the hydrolysis of fractionated cellulose by molten salt hydrates gave a 96.4% of glucose yield.
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SCIENCE OF THE TOTAL ENVIRONMENT
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2022
·
IF 10.753
Zongyao Qian,Rui Gu,Kun Gao,Dejun Li
Plant species diversity (PSD) benefits soil organic carbon (SOC) accumulation, but mechanisms underlying the stimulative effects of PSD on SOC pools have not been well explored, especially in terms of how PSD impacts plant-derived C accumulation. Here, 45 plots covering a natural gradient of PSD ranging from 0.15 to 3.57 (Shannon's diversity index) were selected in a subtropical forest with calcareous soil to determine the pattern of and controls on the variation of plant-derived C as indexed by lignin phenols along with PSD. The absolute contents of lignin phenols ranged from 1.18 to 6.62 mg g −1 soil with an average of 2.48 ± 1.13 mg g −1 soil across the 45 plots. PSD significantly enhanced soil lignin accumulation via three mechanisms. First, PSD benefited lignin accumulation by stimulating plant detritus inputs. Second, PSD directly and indirectly increased reactive minerals, so that enhanced mineral protection of lignin. Third, decrease in microbial C limitation due to increased soil C availability resulted in lowered peroxidase activity and subsequently lignin degradation, which in turn benefited lignin accumulation. Our study provides mechanisms underlying SOC accumulation in response to increased PSD, which may be integrated into Earth system models in order to better predict SOC dynamics under PSD alteration.
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