NEW JOURNAL OF CHEMISTRY
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2026
·
IF 2.5
Chengcheng Liu,Lin Shao,Guo-Heng Wei,Yi-Fan Li,Pan Guo,Ligang Zhang,Cong Wang,Xiao-Yan Zhao,Dejin Zhang,Jing-Pei Cao
Lignin, due to its structural rigidity, tends to form coke deposits during catalytic hydrodeoxygenation (HDO), causing catalyst deactivation, and eliminating coke to restore performance is challenging. In this study, Co 3 O 4 shows excellent HDO performance toward lignin model dimers with high selectivity for demethoxylation and deethoxylation under mild conditions via a one-step strategy integrating in-situ reduction and HDO, and enables lignin HDO. At 240 o C, 2 MPa, and 20 h, lignin achieved a 73 % liquid yield, with 64%, 30%, and 6% selectivities to alkanes, alcohols, and phenols. This is attributed to Co 3 O 4 's high Co-O bond energy, dominant (220) crystal plane exposure, and high Co 3+ /Co 2+ ratio, facilitating in-situ reduction to metallic cobalt active sites. Coke on Co 3 O 4 can be removed by calcination to restore performance, with 90% of the initial liquid yield retained after five cycles. This low-cost commercial non-noble metal Co 3 O 4 enhances the economic feasibility of lignin's high-value utilization.IntroductionLignin, accounting for 15-30 wt% of lignocellulose, is the most abundant renewable aromatic resource on earth, holding immense potential to replace fossil feedstocks in producing high-value
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高影响因子
MATERIALS SCIENCE FORUM
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2017
·
IF 0
Heng Xue Xiang,Zi Ye Chen,Wei Chen,Zhe Zhou,Bin Sun,Mei Fang Zhu
As a potential material for food packaging, fully biodegradable composite films based on novel functionalized natural polyphenol/Poly (3-hydroxybutyrate-co-3-hydroxyvalerate) (PHBV) were successfully fabricated by solution casting, and also the functionalized natural polyphenol (C18TAx) was synthesized by grafting fatty acid onto natural polyphenol Tannic Acid (TA). The resultant C18TAx with better hydrophobicity was uniformly dispersed into a PHBV matrix. The influence of C18TAx dosage on the mechanical behavior, crystallization behavior and thermal properties of the C18TAx/PHBV composite films was investigated by uniaxial tensile mechanical testing, Differential Scanning Calorimeter (DSC), Polarizing Optical Microscope (POM) and Wide Angle X-ray Diffractometry (WAXD). The results revealed that the x value was about 0.09, showing that about 11/20 phenol hydroxy groups in TA molecules were replaced with fatty acid chains. Compared with those of neat PHBV, the tensile strength and elongation at break of the C18TA0.09/PHBV composite films with 10 wt.% C18TA0.09 content were enhanced by 121%, and 458%, respectively. This improvement was primarily ascribed to intermolecular hydrogen bonding interactions in composite films. This new type of fully biodegradable bio-based composite films shows great potential for food packaging.
研究领域:
材料科学
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食品科学
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NEW JOURNAL OF CHEMISTRY
·
2023
·
IF 3.3
Jingya Wen,Xi Wang,Hai-Rong Yu,Xing-Bin Lv,Ting Liang,Changjing Cheng
Glucose detection plays crucial roles in the treatment and management of diabetes. We herein reported a simple strategy to prepare a photonic crystal hydrogel (PNAPB PCH) sensor for colorimetric detection of glucose. This sensor was composed of poly(N-isopropylacrylamide-co-3-acrylamidophenyl boronic acid) smart hydrogel with pendent phenylboronic acid (PBA) units and embedded Fe3O4 colloidal photonic crystals (PCs), which could strongly diffract visible light and endowed the hydrogel with brilliant structural colors. The PBA units could form complex with glucose molecules, thus increasing the ionization degree of the hydrogel and expanding its volume. The volume swelling increased the adjacent distance of the Fe3O4 nanoparticles (NPs) and thereby red-shifted its diffraction wavelength. As a result, the glucose signal could be facilely converted into a color change of the hydrogel. The resulted PNAPB PCH biosensor displayed high sensitivity and selectivity to glucose as well as excellent thermosensitive detection performances. In addition, through taking advantage of the unique thermosensitivity of the introduced PNIPAM moieties on the gel network, the glucose-responded PNAPB PCH sensor could be easily regenerated via simply alternate flushing using hot/cold water while without compromising its performance. Such a glucose-sensitive PCH sensor possessing the obvious advantages of portability, ease of operation, and cost-effectiveness, makes it valuable for daily blood glucose monitoring and diabetes diagnosis.
研究领域:
材料科学
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分析化学
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生物传感器
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糖尿病研究
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高影响因子
POLYMER COMPOSITES
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2022
·Vol. 43
·期 11
·7871-7881
·
IF 3.531
Dongdong Zeng,Yuhang Su,Jiaqi Dong,Xiaojun Ma,Lili Yu,Youjun Lv
In this study, four typical biocomposites from lignin blended with poly-3-hydroxybutyrate-3-hydroxyhexanoate (PHBH) using inorganic nanoparticles (INPs) (SiO 2 , MMT, CaCO 3 , and BN) as fillers were evaluated, which enhanced the thermal, mechanical, and barrier properties of composites. The results revealed that the selection of suitable INPs doped into the lignin/PHBH (L/P) composites was an important approach to achieve available function. MMT/L/P nanocomposites were significantly higher than those of untreated L/P composites in thermal stability (T max exceed 10%) and barrier properties (water vapor and oxygen resistance increased by 48% and 46%), and BN particles increased the initial thermal decomposition temperature by 8%. The elongation at break of CaCO 3 /L/P and BN/L/P composites were increased by 344% and 319%, while SiO 2 /L/P composites had the best tensile strength (18.8 MPa). Besides, the INPs/L/P nanocomposites in this paper exhibited excellent ultraviolet (UV) resistance and might become potential anti-UV packaging materials for grease foods.
研究领域:
材料科学
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生物工程
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高影响因子
MATERIALS LETTERS
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2016
·
IF 2.437
Peng Zou,Hairong Liu,Yongsheng Li,Jiying Huang,Yao Dai
The proliferation of bone marrow-derived mesenchymal stem cells (BMSCs) in vitro is a key challenge for cartilage tissue engineering and their clinical applications. In this study, novel dextran grafting PHBV (PHBV-DEX) fibrous scaffolds were fabricated via surface modification. Compared with the electrospun PHBV fibrous scaffolds, dextran modified ones exhibited significantly enhanced surface hydrophilicity and bioactivity. The water contact angle (WCA) of those scaffolds was reduced from 117.3±4.30° to 56.03±1.13° after dextran modification. PHBV-DEX scaffold significantly promoted the growth of BMSCs compared with unmodified one, suggesting that it can be potentially applied in tissue engineering.
研究领域:
生物材料学
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组织工程学
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再生医学
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高影响因子
INDUSTRIAL CROPS AND PRODUCTS
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2026
·
IF 6.4
Zhuoyu Lu,Nuoyan Ou,Lanying Lin,Kun Liu,Xiaolu Wu,Chuanshuang Hu,Jiangtao Xu,Yonghui Zhou,Mizi Fan
Novel development of high-loading bamboo flour/PHBV biocomposites. • Synergistic treatment of bamboo flour via delignification and impregnation of coupling agents. • Surface roughness and chemical interactions benefitted interfacial adhesion. • Enhanced interfacial bonding contributed to mechanical and thermal property improvement. This paper presents a novel development of bamboo flour/poly(3-hydroxybutyrate-co-3-hydroxyvalerate) (PHBV) biocomposites with a particular focus on addressing the interfacial bonding through a synergistic treatment. The synergistic strategy involves the delignification of bamboo flour followed by impregnation of PHBV-based coupling agents synthesised in this work, including maleic anhydride (MA)-grafted PHBV (MA- g -PHBV), acrylic acid (AA) grafted-PHBV (AA- g -PHBV) and itaconic anhydride (IA) grafted-PHBV (IA- g -PHBV). Chemical structural analyses of bamboo flour suggested the removal of lignin and the possible interactions between surface hydroxyl groups and the introduced anhydride/carboxyl groups after the synergistic treatment. Microstructure analysis suggested the treated bamboo flour with increased surface roughness had better interfacial adhesion with PHBV matrix in the composites, which was further confirmed by their lower loss factor. The tensile strength and flexural strength of MA- g -PHBV modified delignified bamboo flour/PHBV composite were increased by 333.3% and 250.4% respectively, compared to those of the untreated counterpart. The improved interfacial bonding also resulted in the shift of composite failure mechanism from fibre pull-out to fibre breakage. The work provides a feasible and effective modification approach of lignocellulosic fibres for enhancing fibre-matrix interfacial bonding in biobased and biodegradable composites.
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高影响因子
Journal of Food Measurement and Characterization
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2024
·
IF 2.9
Pu Hongbin,Ouyang Qihong,Zhou Xiyi,Sun Da-Wen
Antibiotics and chemical disinfectants usually have serious problems of drug resistance and biosafety. Metal-organic frameworks (MOFs), as a new alternative method, have been studied to inhibit bacteria attributed to their tunability of compositions and structures, ideal biocompatibility and great catalytic properties. In the current study, two trimetal-organic frameworks (Ni 1 Co 1 Fe 1 -MOFs and Ni 6 Co 3 Fe 1 -MOFs) with different atomic ratios of Ni/Co/Fe were synthesized by a simple one-pot room temperature method. The fabricated MOFs showed outstanding Fenton-like catalytic activities and Ni 1 Co 1 Fe 1 -MOFs exerted greater catalytic activity. Based on a Fenton-like reaction, a high-efficiency antibacterial system was constructed. The manufactured Ni 1 Co 1 Fe 1 -MOF/sodium alginate composite coating delayed the weight loss of apple chunks and effectively inhibited E. coli bacteria from polluted apple chunks after storage for 2 d, significantly improving the fruit storage. This study proposed a novel and effective antibacterial strategy, which would open up a promising idea for the exploitation of food antibacterial agents in the future.
研究领域:
材料科学
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化学
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生物技术
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食品科学
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高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
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2018
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IF 2.829
Xueting Lu,Yangyang Li,Wei Feng,Shuang Guan,Peipei Guo
In this report, the self-healable hydrogels containing hydroxypropyl guar gum (HPG), acrylamide (AM) and 3-acrylamidophenylboronic acid (AAPBA) were prepared through a facile strategy. The double bond in AAPBA could polymerize with AM to form copolymers. Moreover, the boronic acid groups of AAPBA can interact with cis-diol of HPG which make AAPBA act not only polymer but cross-linkers simultaneously connecting PAM and HPG chains. The mechanical strength of the hydrogels was systematically investigated as a function of AAPBA content, HPG content, AM content and pH. It was found the hydrogels exhibited higher stress, elongations and self-healing properties due to the synergistic interaction of H-bond and dynamic covalent phenylboronic (PBA)-diol ester bonds. Furthermore, the hydrogels showed yielding phenomenon depending on the content of AM and pH, which could play a vital influence on the crosslinking manners and density. The detailed discussions of the relationship between crosslinking manners and yielding phenomenon provide a better understanding on the appearance of yielding phenomenon and their correlation with hydrogel structure.
研究领域:
材料科学
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生物医学工程
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高影响因子
JOURNAL OF MATERIALS SCIENCE
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2016
·Vol. 51
·期 12
·5695-5711
·
IF 2.302
Xu Yongjing,Zou Liming,Lu Hongwei,Wei Yizhi,Hua Jianbing,Chen Shuyun
Abstract
Poly(3-hydroxybutyrate-co-3-hydroxyvalerate) (PHBV)/polyethylene oxide (PEO) mats were fabricated by electrospinning in different weight ratios (i.e., 100/0, 90/10, 80/20, 70/30, 60/40, 50/50, 0/100). In this paper, dichloromethane (DCM) has been used as potential solvent for electrospinning. In order to evaluate the influence of PEO and DCM on the final properties of PHBV mat, the following characterization techniques were employed: scanning electron microscopy, Fourier transform infrared attenuated total reflectance spectroscopy, X-ray diffraction analysis, thermogravimetric analysis, differential scanning calorimetry, and the test of mechanical properties, water contact angle, porosity analysis, swelling properties, water–vapor transmission rate (WVTR) and in vitro degradation behavior. All PHBV/PEO electrospun mats consist of randomly oriented and distinctly separated fibers. The average fiber diameters and the porosity were 738–1098 nm and 80–90 %, respectively. The water contact angle, swelling ratio, WVTR, and in vitro degradation behavior of PHBV/PEO electrospun mats were 124°–55°, 265–436 %, 1977–2610 g m −2 day −1 , and 17–50 %, respectively. Besides, the crystallinity degree of PHBV/PEO electrospun mats has decreased with the increasing of PEO content. Therefore, PEO imparted PHBV/PEO electrospun mats on better properties, improving the nature defects of PHBV. In particular, PHBV/PEO 70/30 electrospun mat with optimizing performance, was considered the best candidate for potential scaffold in skin tissue engineering.
研究领域:
材料科学
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生物医学工程
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组织工程
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高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
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2022
·
IF 5.518
Pengyao Guo,Xiaomin Hu
To improve the degradation efficiency of g-C 3 N 4 (CN), transition metal elements (Fe and Co) were doped into CN. A novel Co, Fe co-doped CN (Co/Fe-CN) photocatalysts with small size and irregular flake structure were successfully prepared by thermal polymerization of melamine . Co/Fe-CN has a large specific surface area (55.76 m 2 /g), which provides more adsorption sites and reaction sites for the activation of peroxymonosulfate (PMS). Good visible light response performance (474 nm) and suitable band gap (2.83 eV) ensure that it could be excited by visible light. The active species of • O 2 - , 1 O 2 , • OH and SO 4 •- could be stably produced in Co/Fe-CN/Vis/PMS system with appropriate redox potential . Meanwhile, Co and Fe elements doped in CN also could effectively activate PMS and promote the generation of active species. Besides, the continuous generation of photogenerated electrons promoted the cycling of Co 3+ /Co 2+ and Fe 3+ /Fe 2+ , and further enhanced the degradation efficiency of Co/Fe-CN/Vis/PMS towards Levofloxacin (LVFX). LVFX could be rapidly removed, reaching 92.1% within 50 min under visible light illumination, and the kinetic rate constant of LVFX was 0.0638 min -1 . The quenching experiments verified that the 1 O 2 was the main active species in the reaction process. The cycling experiments revealed that the Co/Fe-CN/Vis/PMS system had favorable stability and applicability. This work provides a simple preparation method to fabricate bimetallic co-doped CN for the enhancement of degradation rate in the Photocatalyst/Vis/PMS system.
研究领域:
环境科学
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材料科学
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光催化
·
水处理
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高影响因子
危险品化学品经营许可证（带存储）