ACS Applied Polymer Materials
·
2023
·
IF 5
Ke Li,Xiaoyi Sun,Hua Yin,Kun Yang,Pei Dai,Ling Han,Longgui Zhang,Riwei Xu
Preparing biobased high-performance thermosetting resins is one of the most important factors for sustainable development. In this work, two kinds of phthalonitrile resins containing spirocycle acetal structures were synthesized from pentaerythritol and renewable vanillin and isovanillin by an efficient two-step process. The structures of vanillin- and isovanillin-based phthalonitrile (VPN and IVPN) monomers were characterized by Fourier transform infrared (FTIR), NMR, matrix-assisted laser desorption/ionization time-of-flight mass spectrometry, and elemental analysis. The curing behaviors of these monomers were studied by differential scanning calorimetry and FTIR. The thermal stability and dynamic mechanical properties of the cured resins were investigated by thermogravimetric analysis and dynamic mechanical thermal analysis. The processing properties were studied by a rheological analysis. Compared with traditional petroleum-based phthalonitrile resins such as bisphenol A and bisphenol, cured VPN and IVPN resins exhibited good thermal stability and thermomechanical properties, high glass transition temperature (Tg), and excellent processability.
研究领域:
材料科学
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有机化学
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DOI
高影响因子
RSC Advances
·
2018
·Vol. 8
·期 60
·34297-34303
·
IF 2.936
De Bai,Qin Chen,Yang Chai,Tianhua Ren,Caijuan Huang,Ian D. V. Ingram,Michael North,Qiang Zheng,Haibo Xie
Vanillin has been regarded as one of the important biomass-based platform chemicals for aromatic polymers synthesis. Herein, novel symmetric bis(4-formyl-2-methoxyphenyl)carbonate (BFMC) and bis(4-(hydroxymethyl)-2-methoxyphenyl)carbonate (BHMC) polymeric monomers have been synthesized in high yields using vanillin as a raw chemical, which have been submitted for polymer synthesis via well-established polymeric strategies. A new class of poly(carbonate ester)s oligomers with amide moieties in their side chain can be prepared by using the BFMC as one of monomers via the Passerini three compound reaction (3CR). A new class of poly(carbonate ester)s oligomers and poly(carbonate urethane)s can be prepared via reactions between BHMC with dicarboxylic acid chlorides and diisocyanates, respectively. Their structure have been confirmed by 1H NMR, 13C NMR and FTIR, and the gel permeation chromatograph (GPC) analysis shows that the Mn of poly(carbonate ester)s oligomers ranges from 3100 to 7900 with PDI between 1.31 and 1.65, and the Mn of poly(carbonate urethane)s ranges from 16 400 to 24 400 with PDI ranging from 1.36 to 2.17. The DSC analysis shows that the poly(carbonate ester)s oligomers have relative low Tg ranging from 37.4 to 74.1 °C, and the poly(carbonate urethane)s have Tg ranging from 97.3 to 138.3 °C, mainly correlating to the structure of dicarboxylic acid chlorides and diisocyanates used.
研究领域:
有机化学
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材料科学
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生物质化学
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产品关联
DOI
PubMed
高影响因子
FUEL
·
2022
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IF 8.035
Zidan Zou,Chun Chen,Zhi Hu,Yue Shen,Zhen Fu,Wenchao Li,Yunxia Zhang,Haimin Zhang,Huijun Zhao,Guozhong Wang
Silica is one of the most referenced materials for the preparation of heterogeneous metal catalysts. However, silica spheres with smooth surfaces have difficulty encapsulating active metals due to their small surface area and the presence of only a handful of silicon hydroxyl groups on the surface. In this work, the silica sphere has been first consciously transformed into a hierarchical SiO 2 @silicate structure, and then the core–shell hetero-structured SiO 2 @Ni/SiO 2 catalyst can be tactfully obtained by reducing treatment. The core–shell catalyst is composed of a rigid core (SiO 2 ) and a rough shell (Ni NPs highly disperse on nanosheet SiO 2 ), which are carefully verified by X-ray diffraction (XRD), transmission electron microscope (TEM), field scanning electron microscope (FESEM), H 2 -TPR/TPD and X-ray photoelectron spectroscopy (XPS). The derived SiO 2 @Ni/SiO 2 catalyst can selectively hydrogenate vanillin in the aqueous phase at near-room temperature (40 ℃) and low hydrogen pressure (2 MPa H 2 ), and the conversion of vanillin can be up to 99%. The preparation method of the SiO 2 @Ni/SiO 2 catalyst is simple and can be amplified to a large scale at a low price, thus can be adopted to convert bio-derived unsaturated compounds in an economical and eco-friendly way.
研究领域:
材料科学
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催化化学
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产品关联
DOI
高影响因子
JOURNAL OF ANALYTICAL AND APPLIED PYROLYSIS
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2024
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IF 5.8
Hong Tian,Xuan Huang,Bin Zhao,Huang Zhang,Shan Cheng,Lei Liu
Biomass pyrolysis has the potential to be transformed into valuable chemicals and fuels. Nitrogenous chemicals exert a substantial influence on the quality of bio-oil. Studying the impact of lignin on the transformation of nitrogen-containing elements in biomass during biomass pyrolysis is crucial for achieving efficient and effective utilization of biomass resources. In this study, tube furnace experiments, thermogravimetric infrared experiments (TG-FTIR), and gas chromatography-mass spectrometry (Py-GC/MS) were used to investigate the interactions of typical lignins (vanillin and syringol), nitrogenous components (glutamic acid), and the effect of lignin on the pyrolysis gas release of glutamic acid and the pyrolysis products during the co-pyrolysis process. In addition, the impact of lignin on the effect of pyrrolidone formation from glutamic acid was investigated in this study in conjunction with quantum chemical calculations. The experimental findings demonstrated that the co-pyrolysis of lignin and glutamic acid resulted in a reduction in the pyrolysis temperature. This reduction facilitated the release of HCN, NH 3 , and CO 2 while notably impeding the formation of nitrogen-containing compounds in the oil. The nitrogen concentration in the pyrolysis oil declined from 97 % to a range of 51.06–79.63 %, and the inhibitory impact decreased as the pyrolysis temperature increased. At an elevated pyrolysis temperature of 800 °C, lignin facilitated the decarboxylation process of glutamic acid, resulting in an increased production of pyrrolidone.Simulation results demonstrated that the lowest energy barrier paths were the dehydration condensation process and the Maillard reaction involving glutamic acid and lignin and their pyrolysis intermediates, with a particular competitive connection between the two pathways. The results explained the interaction mechanism between the two pyrolysis products and provided a fundamental theoretical basis for nitrogen conversion in biomass pyrolysis.
研究领域:
能源与环境科学
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化学工程
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产品关联
DOI
高影响因子
INTERNATIONAL JOURNAL OF FOOD MICROBIOLOGY
·
2015
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IF 3.082
Rui Cai,Yahong Yuan,Zhouli Wang,Chunfeng Guo,Bin Liu,Laping Liu,Yutang Wang,Tianli Yue
Alicyclobacillus acidoterrestris has recently received much attention due to its implication in the spoilage of pasteurized fruit juices, which was manifested by the production of guaiacol. Vanillic acid and vanillin have been accepted as the biochemical precursors of guaiacol in fruit juices. The purpose of this study was to try to find other precursors and elucidate details about the conversion of vanillic acid and vanillin to guaiacol by A . acidoterrestris . Four potential substrates including ferulic acid, catechol, phenylalanine and tyrosine were analyzed, but they could not be metabolized to guaiacol by all the thirty A . acidoterrestris strains tested. Resting cell studies and enzyme assays demonstrated that vanillin was reduced to vanillyl alcohol by NADPH-dependent vanillin reductase and oxidized to vanillic acid by NAD(P) + -dependent vanillin dehydrogenases in A . acidoterrestris DSM 3923. Vanillic acid underwent a nonoxidative decarboxylation to guaiacol. The reversible vanillic acid decarboxylase involved was oxygen insensitive and pyridine nucleotide-independent.
研究领域:
微生物学
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食品科学
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产品关联
DOI
PubMed
高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
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2025
·
IF 2.8
Ruiyu Yuan,Yi Yang,Zhenhao Yao,Kan Zhang
In this study, we used vanillin and furfurylamine from renewable resources as starting materials and successfully synthesized an innovative derivative of bisbenzoxazine (MH-fa) using the Mannich reaction. We characterized the chemical structure of the newly synthesized bisbenzoxazine compound using high-resolution mass spectrometry (HR-MS) technology. The results of nuclear magnetic resonance spectroscopy (NMR) and Fourier transform infrared spectroscopy analysis (FT-IR) confirmed the successful synthesis of the target compound. The synthesis of the benzoxazine copolymer (MH-fa-co-DDM-BMI) was achieved by leveraging the reversibility of the Diels–Alder reaction between the MH-fa monomer and 4,4′-bismaleimide diphenylmethane (DDM-BMI). In addition, the investigation into the polymerization behavior of benzoxazine monomer and its corresponding main-chain copolymer was conducted employing differential scanning calorimetry (DSC) along with in situ FT-IR. We studied the thermal stability and combustion performance of two samples using thermogravimetric analysis (TGA) and microscale combustion calorimetry (MCC). The results revealed that the bio-based bisbenzoxazine exhibited excellent heat resistance and flame retardancy. Specifically, poly(MH-fa) exhibits a T d10 value of 350°C and a Y c value of 62.3% at 800°C. Furthermore, the material exhibits an extremely low heat release rate (20.4 J g −1 K −1 ), highlighting its potential applications in the field of high-efficiency flame retardant materials.
研究领域:
材料科学
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化学工程
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DOI
高影响因子
MACROMOLECULAR CHEMISTRY AND PHYSICS
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2025
·Vol. 226
·期 9
·2400493
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IF 2.7
Ruotong Du,Guowen Zhou,Xiaohui Wang
It is highly desirable yet challenging to develop sustainable bio-based polyurethane with excellent mechanical properties, self-healing, and reprocessing abilities. In this study, a rigid bio-based diol (VO) containing oxime group is synthesized via the condensation reaction of lignin-derived vanillin and hydroxylamine. Subsequently, VO is introduced into a castor oil-based WPU (CWPU) system to prepare CWPU-VOs with high biobased content. The presence of dynamic oxime-carbamate bonds endowed CWPU-VOs with excellent self-healing (self-healing efficiency>95%, at 80 °C for 1 h,) and reprocessing properties. By adjusting the ratio of VO and castor oil, the mechanical properties of CWPU-VOs (tensile strength of 11.0–24.3 MPa, elongation at break of 642.2–312.0%) can be effectively tuned. In addition, due to the photolysis behavior of oxime-urethane moieties, CWPU-VOs show outstanding fluorescence anti-counterfeiting potential. This work provides a new idea for the development of high-performance waterborne polyurethane with adjustable mechanical properties, self-healing ability, and fluorescent properties.
研究领域:
材料科学
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生物基材料
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高分子化学
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产品关联
DOI
高影响因子
ChemSusChem
·
2025
·
IF 6.6
Qian Jiang,Zuzhi Li,Javier Remón,Hui Xin,Zhicheng Jiang,Bi Shi
Finding new catalytic applications for tannin, a biomass resource, exploiting its structural features and renewable nature, helps contribute toward carbon neutrality in catalysis. In this study, novel Pd-supported, carbon-neutral catalysts have been synthesized using tannic acid. First, tannic acid was cross-linked and coated on the surface of nano-SiO2. This material was then subjected to controllable carbonization, with the temperature being optimized, to obtain the catalyst support SiO2@TA-T (T: carbonization temperature). Experimental results demonstrated that carbonizing at 400 °C remained part of the phenolic hydroxyls of tannin with satisfactory reducing ability. Meanwhile, the condensation and the deoxygenation of tannin increased the thermal stability of this support and introduced porous structures and abundant defect sites. This material was then used to adsorb and in situ reduce Pd2+ to develop Pd-based catalysts. To this end, this synthesized Pd/SiO2@TA-400 catalyst was then used to hydrogenate vanillin, with a conversion of 99% to vanillyl alcohol at a pressure of 0.5 MPa initial H2 and a temperature of 20°C for 60 min. Such remarkable results were corroborated in the hydrogenation of several lignin-derived aromatic aldehydes, with our catalyst achieving high conversion and outstanding recyclability (5 recycles).
研究领域:
催化化学
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生物质利用
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环境科学
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产品关联
DOI
PubMed
高影响因子
JOURNAL OF MOLECULAR LIQUIDS
·
2017
·
IF 3.648
Shi Mo,Ling Jie Li,Hong Qun Luo,Nian Bing Li
The use of some industrial materials such as medicine and flavor in the anti-corrosion field is an attractive topic. A Schiff base ( N -isonicotinamido-3-methoxy-4-hydroxybenzalaldimine, IM) based on flavor (vanillin) and medicine (isoniazid) has been synthesized and utilized as a green corrosion inhibitor for copper in NaCl media. Electrochemical techniques are employed to analyze its inhibition property. The copper surface is characterized by scanning electron microscopy, infrared spectroscopy , and energy-dispersive X-ray spectroscopy. IM acts as an anodic inhibitor and its inhibition efficiency is up to 93% at 120 mg/L and more remarkable than its corresponding reactants. With a large molecular surface area and better electron donation ability, IM has a better corrosion inhibition performance and may be adsorbed on the copper surface through NH and C N groups, according to theoretical studies.
研究领域:
材料科学
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电化学
·
表面科学
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产品关联
DOI
高影响因子
INDUSTRIAL CROPS AND PRODUCTS
·
2024
·
IF 5.6
Xialin Ji,Xiaoke Tian,Mengqing Zhou,Changzhou Chen,Jianchun Jiang
In this study, different kinds of lignin, including enzymatic hydrolysis of lignin (EHL), alkaline lignin (AL), kraft lignin (KL) and sodium lignosulfonate (LS) were investigated as precursor to prepare Ni@BTC@X (X= EHL, AL, KL, LS) catalysts using a traditional hydrothermal method with Ni-MOF for HDO upgrading of lignin derivative vanillin (VAN) to generate high value chemical 2-methoxy-4-methylphenol (MMP). The catalytic performance of these catalysts was investigated under different reaction conditions, and it was explored that the conversion of VAN was close to 100 % and the MMP yield was close to 90 % under the optimal conditions (Ni@BTC@LS catalyst, 220 ℃, 4 h, isopropanol, 2 MPa N 2 ). Various physical-chemical characterization results verified that the effects of active sites Ni, porous structure of lignin biochar support and electronic properties of the catalysts played a significiant role in HDO of lignin derived VAN. Additionally, synergistic effect of the highly homogeneously dispersed oxygen vacancies and acidic sites also promoted the VAN conversion efficiency. This work developed a strategy combing the advantages of MOFs and biomass derived substrates for manufacturing novel lignin/MOFs materials in the catalytic field.
研究领域:
化学工程
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环境科学
·
催化材料
✓ 已验证
产品关联
DOI
高影响因子
Current Research in Food Science
·
2024
·
IF 6.2
Jianfei Zhu,Tingting Huang,Xiaomei Chen,Dongling Tian
In this study, the effect of chitosan-vanillin Schiff base emulsions (CSVAEs) on dough and bread characteristics was investigated. The results revealed that CSVAEs were embedded in the gluten and that the viscoelasticity and mechanical strength of the dough gradually increased with increasing CSVAEs concentration, α-helical and β-fold content, and elastic structure in the dough increased with the same patterns. The basic properties of bread were measured, and it was found that low concentrations of CSVAEs were effective in improving the quality of bread and slowing the staling rate. As the storage time increased, CSVAEs had less effect on the rate of moisture loss, hardness and springiness of the bread and more effect on the inhibition of the acidity of the bread. The addition of CSVAEs slowed the increase in bacteria and molds and extended the shelf life of the bread.
研究领域:
食品科学
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生物化学
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产品关联
DOI
PubMed
高影响因子
STARCH-STARKE
·
2021
·
IF 2.741
Dan Qin,Jun Wu,Yuxiang Zhang,Mian Bao,Xiaoyue Du,Hongqing Sang,Zhengyou Wei
This study experimentally investigates the effect of changes in amylose-to-amylopectin ratio on the multi-scale structures, hydrophilicity, and thermal properties of starch–chitosan essential oil (EO) films incorporated with vanillin. The results indicate that aggregates and uneven structures tend to form in the EO films with a higher proportion of amylose. In Fourier transform infrared spectroscopy, as the chitosan content increases, the wavenumber of stretching vibration of hydroxyl and the bending vibration of amino groups decrease, while the wavenumber of stretching vibration of C-O increases. Furthermore, with an increase in the chitosan content, the changes in the starch–chitosan EO film structure impacts the hydrophilic trend, and the hydrophilic changes in the EO films with common starch and G80 starch are significant changes with the proportions of starch to chitosan from 7:3 to 5:5. When their mass ratio is 3:7, the starch–chitosan EO films investigated exhibit the lowest decomposition peak temperature.
研究领域:
食品科学
·
材料科学
✓ 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）