JOURNAL OF POLYMER RESEARCH
·
2025
·Vol. 32
·期 2
·1-13
·
IF 2.8
Wang Chaoying,Xin Zhong
In this work, polyacrylonitrile (PAN) homopolymer, poly(acrylonitrile-methyl acrylate)[P(AN-MA)], poly(acrylonitrile-methyl acrylate-itaconic acid)[P(AN-MA-IA)] and poly(acrylonitrile-methyl acrylate-ammonium itaconic acid)[P(AN-MA-AIA)] with narrow polydispersity were successfully produced in continuous flow. The compositions, molecular weights, molecular weight distributions and crystalline structures of these PAN polymers were measured and the influence of IA and AIA on cyclization reactions, structural transformation and thermal stability during the stabilization process was also explored. The incorporation of IA and AIA into polymer chains reduces the initial temperatures of cyclization reactions, broadens the exothermic peaks, eases the concentrated heat through an ionic mechanism and exhibits better stabilization at lower temperatures. Furthermore, AIA effectively promotes dehydrogenation reaction. Among these four PAN polymers, P(AN-MA-AIA) terpolymer presents the best stabilization since COO − NH 4 + has the strongest nucleophilicity towards nitrile groups that are close to carbon atoms.
研究领域:
高分子化学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
ACS Sustainable Chemistry & Engineering
·
2020
·
IF 7.632
Xiaohui Di,Yu Zhang,Junying Fu,Qiang Yu,Zhongming Wang,Zhenhong Yuan
Dimethyl itaconate (DI), a promising biomass-derived intermediate, cannot be synthesized from itaconic acid (IA) in organisms due to the lack of metabolic pathways. It is necessary to develop a green and high-efficiency method to synthesis DI from IA. In this study, DI was, for the first time, produced from IA in an aqueous medium by an ionic liquid-strengthened enzymatic method. We found that when pretreated by the ionic liquid, 1-butyl-3-methylimidazolium hexafluorophosphate ([bmim][PF6]), the pH tolerance range of the lipase shrunk and the hydrolysis activity of it was greatly inhibited, while its esterification activity was not. Moreover, when the [bmim][PF6]-treated immobilized Rhizomucor miehei lipase (RML, 50 mg/mL) was employed in a reaction containing IA/methanol at a molar ratio of 1:30 and methanol/water in a volume ratio of 1:10 at 30 °C after 24 h, a 64.3% yield and 73.2% selectivity of DI was obtained. The results of HPLC and GC–MS revealed that in addition to the main product DI, other side products including acetic acid, propionic acid, and itaconic acid cyclolactone were also generated, which indicates that the RML-catalyzed esterification of IA and methanol has various side reactions, such as lactonization and self-decomposition of IA.
研究领域:
生物化学
·
绿色化学
✓ 已验证
产品关联
DOI
高影响因子
Polymers
·
2018
·Vol. 10
·期 10
·1049
·
IF 2.935
Yufeng Ma,Xuanang Gong,Chuhao Liao,Xiang Geng,Chunpeng Wang,Fuxiang Chu
In order to improve the performance of phenolic foam, an additive compound of 9,10-dihydro-9-oxa-10-phosphaphenanthrene-10-oxide (DOPO) and Itaconic acid (ITA) were attached on the backbone of ethyl cellulose (EC) and obtained DOPO-ITA modified EC (DIMEC), which was used to modify phenolic resin and composite phenolic foams (CPFs). The structures of DOPO-ITA were verified by Fourier transform infrared spectroscopy (FT-IR) and nuclear magnetic resonance (1H NMR). The molecular structure and microstructure were characterized by FT-IR spectra and SEM, respectively. Compared with EC, the crystallinity of DIMEC was dramatically decreased, and the diffraction peak positions were basically unchanged. Additionally, thermal stability was decreased andTidecreased by 24 °C. The residual carbon (600 °C) was increased by 25.7%. With the dosage of DIMEC/P increased, theEavalues of DIMEC composite phenolic resins were increased gradually. The reaction orders were all non-integers. Compared with PF, the mechanical properties, flame retardancy, and the residual carbon (800 °C) of CPFs were increased. The cell size of CPFs was less and the cell distribution was relatively regular. By comprehensive analysis, the suitable dosage of DIMEC/P was no more than 15%.Keywords:DOPO;itaconic acid;ethyl cellulose;phenolic foams;composites
研究领域:
材料科学
·
化学工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Environmental Technology & Innovation
·
2021
·
IF 5.263
Chen Zhao,Jia Zhang,Qiulin Yue,Lin Zhao,Huan Ma,Zhengyan Wu,Xin Zhang
To meet the demands of a growing population, the global food production will have to increase by at least 70% by 2050. Developing high-performance water and nutrient retaining fertilizer (WNRF) to increase crop yield in arid and semi-arid areas is an effective measure to maintain the balance of ecological environment and the sustainable development of human being. In this study, itaconic acid, as one of the 12 most promising bio-based platform compounds, was combined with urea and acrylic acid in methanol to form the oligomer, which could quickly cross-link to obtain a new type of WNRF with the rapid evaporation of methanol. According to the performance of water and fertilizer retention, the optimal WNRF showed water retention ratio of 47.1%, migrate-to-surface loss control ratio of 85.6%, and leaching loss control ratio of 66.6%, respectively. It retained in the soil via the filtering effect, resulting in lower loss of water and nutrient. As illustrated by two individual pot experiments, the optimal WNRF effectively facilitated the growth of plant rape and maize, in which the dry matter weight of shoot was increased by 28% and 88% compared to the control group. This work provides a promising approach to enhance the utilization efficiency of water and nutrient, which is expected to have potential applications in sustainable modern agriculture of drought regions.
研究领域:
农业科学
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环境科学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
POLYMER DEGRADATION AND STABILITY
·
2018
·
IF 3.193
Dapeng Liu,Qin Ouyang,Xuefeng Jiang,Hongbo Ma,Yousi Chen,Liu He
Lignin, the most abundant aromatic biopolymer on the earth, is considered as a sustainable carbon fiber precursor. However, lignin-based carbon fibers face great challenges in the fiber spinning and thermal stabilization due to the complex structure of lignin. In this work, lignosulfonate-acrylonitrile-itaconic acid (LS-AN-IA) terpolymer with excellent spinnability was prepared as a novel precursor for carbon fibers, and the thermal properties and thermal stabilization of this precursor were studied. The introduced itaconic acid (IA) comonomer was found to play an important role in improving the thermal properties and promoting the thermal stabilization. The hindering effect of LS on the cyclization reaction of nitrile groups was overcome by the IA comonomer through changing free-radical reaction mechanism to an ionic one. The thermal stabilization of the LS-AN-IA terpolymer precursor fibers could be carried out at a lower temperature and required a shorter time, which helped to reduce the energy and time consumption. Carbon fibers with tensile strength and tensile modulus of 1.74 GPa and 210 GPa, respectively, were obtained from the LS-AN-IA terpolymer.
研究领域:
材料科学
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
GREEN CHEMISTRY
·
2015
·Vol. 17
·期 4
·2383-2392
·
IF 8.02
Jinyue Dai,Songqi Ma,Yonggang Wu,Lijing Han,Lisheng Zhang,Jin Zhu,Xiaoqing Liu
A series of bio-based polyesters were synthesized by melt polycondensation of itaconic acid with diols and glycerol without VOC emission. Their chemical structures were confirmed by FT-IR and 1H-NMR before they were made to copolymerize with acrylated epoxidized soybean oil (AESO). The thermal and mechanical properties of the resulting thermosets were investigated by differential scanning calorimetry (DSC), tensile testing and dynamic mechanical analysis (DMA). Their coating properties on tinplate and glass plate were also studied. Results showed that the tensile strength, modulus, glass transition temperatures and bio-based content of the AESO-based thermosetting resins were significantly improved after the introduction of the synthesized polyesters. In addition, the modified AESO systems could be well coated on the surface of tinplate and glass plate and good coating properties such as hardness, flexibility, adhesion, solvent resistance and water absorption were demonstrated. They showed great potential for applications as coatings, adhesives and composites.
研究领域:
材料科学
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
CARBOHYDRATE RESEARCH
·
2014
·
IF 1.966
Yong-Fu Li,Yi-Ming Ha,Qin Guo,Qing-Peng Li
β-CD maleate (CDM) and β-CD itaconate (CDI) were prepared by esterification of β-cyclodextrin (β-CD) with maleic acid and itaconic acid using phosphate as a catalyst in a semi-dry process. The esterification of β-CD was carried out using [Itaconic acid ] or [Maleic acid ] 4 mol/mol of CD; M / L ratio 1:0.6; temperature 110 °C; [4-methoxyphenol] 2.5% amount of acid; reaction time 3.5 h. The esterification rates of CDM and CDI are 70.38% and 21.02%, respectively. We found that CDM and CDI were both monoesters. Here, we also established a new evaluation method for the rate of esterification.
研究领域:
有机化学
·
材料科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2024
·
IF 8.1
Xiaoli Huang,Siyu Wang,Xinqi Wang,Jiasheng Shi,Liuqian Bao,Yanyan Wang,Zhiyong Chen
It is a challenging issue to simultaneously achieve high separation efficiency and high separation speed in a continuous flow separation process. Herein, inspired by reverse wood porous structure, the first example of artificial reverse wood-like polymer with horizontal aligned porous structure is shown in poly(itaconic acid) (PIA) cryogel fabricated by horizontal placement in situ cryo-polymerization technique. The vertical aligned porous PIA cryogel, as wood-like type control, is also constructed under the identical conditions except placement direction. After examined by a series of characterization, the horizontal PIA cryogel displays multiple similarities in comparison with the vertical one, including pore size, surface area, composition, carboxylic group content and wetting ability; but it shows significant difference in porous orientation and compressive property compared to the counterpart. Based on static and dynamic adsorption tests, methylene blue adsorption on the two columns obeys similar mathematics models, and the maximum static adsorption achieves 172.4 mg/g on the horizontal PIA column and 170.2 mg/g on the vertical PIA column based on Langmuir model, respectively; but in a continuous flow mode, the horizontal PIA column shows 126.2 mg/g dynamic adsorption, which is much higher than that obtained on the vertical one (76.3 mg/g) in terms of Thomas model. The adsorbent utilization efficiency of the reverse wood mimetic column is 73.2 % at 500 mg/L dye concentration and at 25 mL/min flow rate, which is superior to most of those reported in literature. The artificial wood-like column thereafter reaches high efficiency of cross flow filtration for rapid continuous removal of dye molecules from complex emulsion wastewater.
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
CRYSTAL RESEARCH AND TECHNOLOGY
·
2024
·Vol. 59
·期 2
·2300264
·
IF 1.5
Hongyan Cui,Liangcheng Song,Sheng Lv,Chongqiang Zhu,Chunhui Yang
Seeding metastable zone of itaconic acid in water is determined using a laser dynamic detecting technique, based on which feedback supersaturation control is performed for the crystallization process. The crystallization is strictly confined within the metastable zone throughout the whole process to effectively inhibit the secondary nucleation and the strategy of seed loading is employed to avoid the burst of primary nucleation, resulting in the uniform particle size distribution. With the aid of solution information, continuous feedback control is conducted to keep the supersaturation at a high level accelerating the crystal growth, which significantly shortens the time consumption, and also the effect of seed amount is discussed in this work.
研究领域:
化学工程
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
SURFACE AND INTERFACE ANALYSIS
·
2018
·Vol. 51
·期 2
·199-209
·
IF 1.263
Lei Shang,Mengjie Zhang,Liu Liu,Linghan Xiao,Ming Li,Yuhui Ao
To improve the interfacial properties of carbon fibre-reinforced polymer composites, a surface treatment was used to cap cross-linked poly-itaconic acid onto carbon fibres via in-situ polymerization after itaconic acid grafting. The chemical composition of the modified carbon fiber (CF) surface was characterized by X-ray photoelectron spectral and Fourier-transform infrared spectroscopy. Scanning electron microscopy and atomic force microscopy images showed that the poly-itaconic acid protective sheath was uniformly capped onto the CF surface and that the surface roughness was obviously enhanced. Chemical bonds also played a key role in the interfacial enhancement. The results showed that the interfacial shear strength of the composites with poly-itaconic acid on the carbon fibres (72.2 MPa) was significantly increased by 89.5% compared with that of the composites with pristine CF (38.1 MPa). Moreover, the poly-itaconic acid sheath promoted a slight increase in mono-fibre tensile strength. In addition, the interfacial mechanisms were also discussed. Meanwhile, the mechanical property of the functionalized CF/epoxy resin composites was also significantly improved.
研究领域:
材料科学
·
复合材料
✓ 已验证
产品关联
DOI
高影响因子
BIOPROCESS AND BIOSYSTEMS ENGINEERING
·
2025
·
IF 3.6
Yi Xia,Li Xinji,Han Jianqi,Liu Zhidan,Shi Xiaohui,Wen Tao,Zhu Jie
Itaconic acid can be produced using lignocellulosic biomass; however, the inhibitors from pretreatment process of biorefinery are toxic to the fermenting strains. Here, with 35.70 ± 0.69 g/L (0.19 ± 0.05 g/L·h and 73.84 ± 0.01%) itaconic acid from shake flask fermentation of synthetic medium (SM), a newly isolated Aspergillus terreus just produced 1.01 ± 0.01 g/L itaconic acid from corn stover hydrolysates (CSH) for the serious block of aldehyde inhibitors and acetic acid. Convincingly, 25.34 ± 3.94 g/L (0.13 ± 0.02 g/L·h and 37.92 ± 3.89%) itaconic acid was achieved from the detoxified CSH (with residual 0.49 g/L acetic acid) using 4.0% activated charcoal. 21.64 ± 2.42 g/L (0.05 ± 0.01 g/L·h and 26.96 ± 7.81%) itaconic acid was further achieved from CSH for the adapted A. terreus with better degradation ability of furanic aldehydes and phenolic aldehydes. Furthermore, the 108 mutation sites of nine genes from adaptive laboratory evolution (ALE) for A. terreus were further uncovered through single nucleotide polymorphisms (SNPs) analysis, and thus would be responsible for the improved fermentability of itaconic acid from CSH. The current work broke the bottlenecks in itaconic acid fermentation directly from CSH through improving A. terreus using directed evolution technique, and thus would provide a strain biocatalyst A. terreus and establish the alternative strategy to efficiently produce itaconic acid using corn stover. Graphical abstract
研究领域:
生物技术
·
发酵工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
EUROPEAN POLYMER JOURNAL
·
2019
·
IF 3.621
Jian Hao,Huiqing Wei,Chunxiang Lu,Yaodong Liu
Poly(acrylonitrile-co-itaconic acid) (PAI) is the most widely used precursor for making high performance carbon fiber. In this study, we synthesized PAI with various contents of itaconic acid (IA) in the range of 0 to 22 mol%. The addition of IA not only changes acrylonitrile (AN) segment length distribution, but also initiate AN cyclization at a lower temperature. The effects of PAI sequence distribution and initiation mechanisms on PAN cyclization were systematically studied by differential scanning calorimetry, nuclear magnetic resonance, Fourier transform infrared spectroscopy and thermogravimetry. These results show how the AN sequence length and the carboxyl groups in IA affect the cyclization reaction, the formed ladder structures, and carbon yields.
研究领域:
高分子化学
·
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）