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1. Theoretical and experimental investigations into the pyrolysis mechanisms of silicon-modified phenolic resin under high temperatures

Author:
YouPei Du; ZhenHua Luo; Yang Yang; Yiming Yang; WenJie Yuan; Hao Li; YiQiang Hong; Zhen Dai; PingXia Zhang; Tong Zhao
Source:
Carbon 2023 v.201 pp. 504-519
ISSN:
0008-6223
Subject:
phenolic resins,   etc   ; Fourier transform infrared spectroscopy; X-ray diffraction; X-ray photoelectron spectroscopy; algorithms; aromatization; carbon; carbonization; crosslinking; microstructure; molecular dynamics; pyrolysis; separation; simulation models;     Show all 14 Subjects
Abstract:
... ReaxFF molecular dynamics (ReaxFF-MD) simulations and X-ray photoelectron spectroscopy (XPS), X-ray diffraction (XRD), Raman, Fourier transform infrared spectroscopy (FT-IR), ²⁹Si NMR were used to investigate the temperature-dependent pyrolysis gas release behavior, dynamic evolution of microstructure, and fundamental carbonization mechanism of silicon-modified phenolic resin (SiPR). An improved a ...
DOI:
10.1016/j.carbon.2022.07.061

2. Novel molecularly imprinted phenolic resin–dispersive filter extraction for rapid determination of perfluorooctanoic acid and perfluorooctane sulfonate in milk

Author:
Jing Ren; Yanke Lu; Yehong Han; Fengxia Qiao; Hongyuan Yan
Source:
Food chemistry 2023 v.400 pp. 134062
ISSN:
0308-8146
Subject:
phenolic resins,   etc   ; adsorbents; adsorption; ambient temperature; food chemistry; food safety; glutaraldehyde; liquid chromatography; mass transfer; milk; perfluorononanoic acid; perfluorooctane sulfonic acid; perfluorooctanoic acid; tandem mass spectrometry;     Show all 14 Subjects
Abstract:
... Perfluorooctanoic acid (PFOA) and perfluorooctane sulfonate (PFOS) are emerging pollutants that threaten food safety. Herein, a rapid, accurate, and selective method for determination of PFOA and PFOS in milk was established by using new molecularly imprinted phenolic resin (MIP-PR) as the adsorbent of dispersive filter extraction (DFE) combined with liquid chromatography-tandem mass spectrometry ...
DOI:
10.1016/j.foodchem.2022.134062

3. Catalytic Activation of Unstrained C(Aryl)–C(Alkyl) Bonds in 2,2′-Methylenediphenols

Author:
Jun Zhu; Yibin Xue; Rui Zhang; Benjamin L. Ratchford; Guangbin Dong
Source:
Journal of the American Chemical Society 2022 v.144 no.7 pp. 3242-3249
ISSN:
1520-5126
Subject:
phenolic resins; resins,   etc   ; Americans; carbon-hydrogen bond activation; catalysts; exhibitions; journals; methodology; models;     Show all 9 Subjects
Abstract:
... Catalytic activation of unstrained and nonpolar C–C bonds remains a largely unmet challenge. Here, we describe our detailed efforts in developing a rhodium-catalyzed hydrogenolysis of unstrained C(aryl)–C(alkyl) bonds in 2,2′-methylenediphenols aided by removable directing groups. Good yields of the monophenol products are obtained with tolerating a wide range of functional groups. In addition, th ...
DOI:
10.1021/jacs.1c13342

4. Solid-Phase Total Synthesis of Plusbacin A₃

Author:
Kazuki Takashina; Akira Katsuyama; Rintaro Kaguchi; Kazuki Yamamoto; Toyotaka Sato; Satoshi Takahashi; Motohiro Horiuchi; Shin-ichi Yokota; Satoshi Ichikawa
Source:
Organic letters 2022 v.24 no.11 pp. 2253-2257
ISSN:
1523-7052
Subject:
resins,   etc   ; diastereoselectivity; peptides; solids;     Show all 4 Subjects
Abstract:
... The total synthesis of the depsipeptide natural product plusbacin A₃ (1) utilizing solid-phase peptide synthesis (SPPS) was disclosed. A 3-hydroxy-proline derivative compatible with Fmoc SPPS was prepared by a diastereoselective Joullié–Ugi three-component reaction (JU-3CR)/hydrolysis sequence. After peptide elongation on the solid support, cleavage of the peptide from the resin, followed by macr ...
DOI:
10.1021/acs.orglett.2c00667

5. Enhanced electrochemical performance of the fluidization separation graphite powders from waste power lithium-ion batteries by phenolic resin carbon coated

Author:
Changliang Shi; Silong Zhang; Zhendong Jiang; Haozhi Sun; Chuanxiang Zhang; Fengfeng Xue
Source:
Powder technology 2022 v.411 pp. 117921
ISSN:
0032-5910
Subject:
phenolic resins,   etc   ; electrochemistry; graphene; industry; lithium; technology;     Show all 6 Subjects
Abstract:
... The recycling of waste lithium batteries (LIBs) is important for the healthy development of the LIBs industry. In this work, a column fluidized bed was designed to recover graphite powder from waste LIBs, and the phenolic resin-coated recovered graphite powder composites ware prepared by liquid-phase impregnation-carburization method, which effectively repaired the pores and defects on the surface ...
DOI:
10.1016/j.powtec.2022.117921

6. Facile preparation of reprocessable and degradable phenolic resin based on dynamic acetal motifs

Author:
Juxiang Chen; Ke Zhang; Kuiyuan Zhang; Bo Jiang; Yudong Huang
Source:
Polymer degradation and stability 2022 v.196 pp. 109818
ISSN:
0141-3910
Subject:
phenolic resins,   etc   ; crosslinking; degradation; strength (mechanics); temperature;     Show all 5 Subjects
Abstract:
... Phenolic resins with irreversible cross-links structure make them difficult to degrade and recycle. It is an emerging trend for phenolic resins thermoset to develop a rapid and facile closed-loop recycling approach. Herein, the degradable and reprocessable phenolic thermosets (PRTs) based on reversible acetal bonds were synthesized by tri(ethylene glycol) divinyl ether (TEGDVE) and linear phenolic ...
DOI:
10.1016/j.polymdegradstab.2022.109818

7. One-step separation of Cu, Fe, Zn and Cd and isotope ratio analysis by MC-ICP-MS for geological samples

Author:
Hai-tao Li; Xing Li; Ming Li; Wei Guo; Lan-lan Jin; Zhen-li Zhu; Qing-ye Hou; Sheng-hong Hu
Source:
Analytical methods 2022 v.14 no.28 pp. 2782-2792
ISSN:
1759-9679
Subject:
anion exchange resins,   etc   ; aerosols; isotopes; quality control; soil;     Show all 5 Subjects
Abstract:
... Multi-isotope systems have shown great application potential in tracing geological and environmental processes. In order to obtain the isotopic composition of multiple elements of interest, the common protocol is to separate each element from the matrix by independent procedures, which has some limitations, including poor efficiency, being time-consuming, requiring large samples and being unsuitab ...
DOI:
10.1039/d2ay00559j

8. Assessing explicit models of per- and polyfluoroalkyl substances adsorption on anion exchange resins by rapid small-scale column tests

Author:
Yifei Wang; Max Warner; Ke Li; Gary L. Hawkins; Qingguo Huang
Source:
Chemosphere 2022 v.300 pp. 134547
ISSN:
0045-6535
Subject:
anion exchange resins,   etc   ; adsorption; anion exchange; filtration; perfluorocarbons; solutes;     Show all 6 Subjects
Abstract:
... Managing per- and polyfluoroalkyl substance (PFAS) contamination has gained worldwide attention due to their ubiquitous occurrence in water systems. Anion exchange resins (AERs) have been proven effective in removing both long-chain and short-chain PFASs. In this study, an explicit model was developed to describe the breakthrough behavior of an individual PFAS as a single solute onto anion exchang ...
DOI:
10.1016/j.chemosphere.2022.134547

9. Fabrication of a mechanically tough and strong graphene oxide aerogel modified phenolic resin by balancing the trade-off between load transfer efficiency and chain segment mobility

Author:
Zixuan Lei; Jian Wang; Chi Zhang; Jian Li; Yuhong Liu
Source:
Composites 2022 v.152 pp. 106701
ISSN:
1359-835X
Subject:
phenolic resins,   etc   ; aerogels; glass transition temperature; graphene oxide; microstructure; nanocomposites;     Show all 6 Subjects
Abstract:
... In this work, a mechanically strong and tough novolac phenolic nanocomposites (GESNH) was successfully constructed by modulating its load transfer efficiency and chain segment mobility with reactive micro-sized graphene oxide aerogel (GES). DMA analysis reveals that the microstructure of GESNH can be divided into three regions including the “bricks in mortar” structure, the main phenolic networks ...
DOI:
10.1016/j.compositesa.2021.106701

10. Modified montmorillonite synergizes with Co-MOF@PBO fabric to improve the wear resistance of PBO/phenolic resin composites

Author:
Yanling Wang; Zhaozhu Zhang; Mingming Yang; Junya Yuan; Peilong Li; Meng Liu
Source:
Journal of colloid and interface science 2022 v.611 pp. 480-490
ISSN:
0021-9797
Subject:
phenolic resins,   etc   ; fabrics; friction; heat; montmorillonite; nanosheets; surface area; synergism;     Show all 8 Subjects
Abstract:
... Co-MOF (cobased metal-organic frame) nanosheets were developed onto the surface of PBO (poly(p-phenylene benzobisoxazole)) fabric, and OMMT (modified montmorillonite) was incorporated into phenolic resin synergistically to improve the wear resistance of PBO/phenolic resin composites. Co-MOF nanosheets with a large specific surface area exhibited strong interlocking and excellent compatibility betw ...
DOI:
10.1016/j.jcis.2021.12.101

11. Mechanical properties and thermal conductivity of lightweight and high-strength carbon-graphite thermal insulation materials

Author:
Junchao He; Haihua Wu; Lei Zhong; Qiang Zhong; Qiang Yang; Xicong Ye; Zhi Liu; Yi Kang
Source:
Journal of materials science 2022 v.57 no.6 pp. 4166-4179
ISSN:
0022-2461
Subject:
phenolic resins,   etc   ; compression strength; graphene; heat; insulating materials; porosity; thermal conductivity;     Show all 7 Subjects
Abstract:
... Thermal insulation composites are widely used in civil and military applications; however, it is difficult to achieve the synergy of multiple technical objectives such as lightweight, thermal insulation, high pressure resistance and high-temperature resistance by adopting traditional preparation techniques. In this study, a novel carbon-graphite thermal insulation material was rapidly prepared by ...
DOI:
10.1007/s10853-021-06862-6

12. Electrically regenerated ion-exchange technology: Leveraging faradaic reactions and assessing the effect of co-ion sorption

Author:
Lukas Hackl; Shao-Wei Tsai; Bavisha Kalyan; Chia-Hung Hou; Ashok Gadgil
Source:
Journal of colloid and interface science 2022 v.623 pp. 985-991
ISSN:
0021-9797
Subject:
ion exchange resins,   etc   ; adsorption; deionization; desalination; ion exchange; pH; reverse osmosis;     Show all 7 Subjects
Abstract:
... Capacitive deionization (CDI) technologies have the potential to become cost-competitive alternatives to reverse osmosis for the treatment of brackish waters. In this study, we report our findings on the effect of co-ion sorption and faradaic side reactions on our ion exchange resin functionalized desalination electrodes which passively capture salt and reject it upon charging. This system, which ...
DOI:
10.1016/j.jcis.2022.05.104

13. Application of the Steric Mass Action formalism for modeling under high loading conditions: Part 2. Investigation of high loading and column overloading effects

Author:
Felix Seelinger; Felix Wittkopp; Thomas von Hirschheydt; Christian Frech
Source:
Journal of chromatography 2022 v.1676 pp. 463266
ISSN:
0021-9673
Subject:
cation exchange resins,   etc   ; antibodies; chromatography; data collection; mass transfer; models; pH; prediction;     Show all 8 Subjects
Abstract:
... The application of a model-based approach for industrial chromatography development requires the capability of the model to describe protein elution under high loading and overloading conditions. In a previous work, an extensive dataset was created to model the elution behavior of a bispecific antibody (bsAb) on the strong cation exchange resin POROS™ XS. Thereby, the pH-dependence of the model pa ...
DOI:
10.1016/j.chroma.2022.463266

14. Effect of Mesophase Pitch Incorporation on the Ablation Behavior and Mechanism of Phenolic Composites

Author:
Yisen Huang; Haoruo Zhang; Xueqin Zhang; Liwei Yan; Youquan Ling; Huawei Zou; Yang Chen; Mei Liang
Source:
Industrial & engineering chemistry process design and development 2022 v.61 no.13 pp. 4612-4624
ISSN:
1520-5045
Subject:
phenolic resins,   etc   ; chemistry; industry; insulating materials; micropores; porous media; process design; temperature;     Show all 8 Subjects
Abstract:
... Phenolic resin plays a critical role in ablative thermal protection materials. However, its ablation and insulation properties need to be further improved to meet the growing requirements of the entire aerospace industry. In this work, composites are altered with various loadings of mesophase pitch (MP) to make mesophase pitch-modified boron-phenolic resin (BPR) composites (MPBPR). The compressive ...
DOI:
10.1021/acs.iecr.2c00367

15. Relationship between the 3D Footprint of an Agricultural Tire and Drawbar Pull Using an Artificial Neural Network

Author:
Maurizio Cutini; Corrado Costa; Massimo Brambilla; Carlo Bisaglia
Source:
Applied engineering in agriculture 2022 v.38 no.2 pp. 293-301
ISSN:
0883-8542
Subject:
phenolic resins,   etc   ; agriculture; artificial intelligence; evolution; landscapes; neural networks; prediction; soil; tractors;     Show all 9 Subjects
Abstract:
... Highlights Improvement of tractor traction provides better field efficiency. Drawbar pull increased with tire footprint length. Drawbar pull decreased with increasing tire footprint volume and depth. 3D footprint parameters, which the 2D footprint do not contain, affected the drawbar pull significantly.The ANN highlighted the relation adequately. Improving the traction of an agricultural tractor o ...
DOI:
10.13031/aea.13851

16. Separation of vanadium and tungsten from synthetic and spent catalyst leach solutions using an ion-exchange resin

Author:
Jong Hyuk Jeon; Ana Belen Cueva Sola; Jin-Young Lee; Janardhan Reddy Koduru; Rajesh Kumar Jyothi
Source:
RSC advances 2022 v.12 no.6 pp. 3635-3645
ISSN:
2046-2069
Subject:
anion exchange resins,   etc   ; adsorption; catalysts; desorption; ion exchange; pH; spectroscopy; tungsten; vanadium;     Show all 9 Subjects
Abstract:
... Vanadium and tungsten ion adsorption and desorption characteristics and separation conditions were investigated using a simple porous anion-exchange resin. Initially, systematic experimental research was performed using synthetic aqueous vanadium and tungsten solutions. To evaluate the vanadium and tungsten (50–500 mg L⁻¹) isotherm parameters, adsorption was performed at pH 7.0 using 0.5 g of ion- ...
DOI:
10.1039/d1ra05253e

17. A review on recent advances in electrodeionization for various environmental applications

Author:
B. Senthil Rathi; P. Senthil Kumar; R. Parthiban
Source:
Chemosphere 2022 v.289 pp. 133223
ISSN:
0045-6535
Subject:
ion exchange resins,   etc   ; electric power; energy; heavy metals; toxicity; wastewater; water treatment;     Show all 7 Subjects
Abstract:
... The growing contamination of ecosystems necessitates the development of long-term pollution-removal technologies. Electrodeionization, in notably, has newly proven as an efficient method for removing ionic chemicals from polluted waterways. The fact that continuous electrodeionization is a greener technique is most probably the biggest cause for its success. It replaces the toxic chemicals typical ...
DOI:
10.1016/j.chemosphere.2021.133223

18. Laboratory evaluation of operating conditions for chloride removal from diethanolamine using ion exchange resin and introduction of optimal parameters

Author:
Farshad Farahbod
Source:
Applied water science 2022 v.12 no.9 pp. 229
ISSN:
2190-5487
Subject:
ion exchange resins,   etc   ; acidity; chlorides; hydrogen; ion exchange; pH; sodium hydroxide; temperature; water;     Show all 9 Subjects
Abstract:
... In this study, a strong anionic resin was used to remove the chloride ion in the diethanolamine of sweetening unit of gas refinery. A laboratory pilot has been investigated as a resin-filled bed to evaluate the reaction temperature, chloride ion concentration, resin saturation, resin recovery rate, optimal reaction temperature, diethanolamine flow rate, hydrogen strength and resin performance in t ...
DOI:
10.1007/s13201-022-01752-x

19. Microstructure and magnetic properties of novel powder cores composed of iron-based amorphous alloy and PTFE

Author:
Jiajia Si; Rui Ma; Yue Wu; Yaqiang Dong; Kefu Yao
Source:
Journal of materials science 2022 v.57 no.17 pp. 8154-8166
ISSN:
0022-2461
Subject:
phenolic resins,   etc   ; air; alloys; cold; epoxides; lubricants; magnetic fields; microstructure; permeability; polytetrafluoroethylene; temperature;     Show all 11 Subjects
Abstract:
... The temperature resistance of a magnetic powder core is determined by the organic resin in it, while the conventionally used phenolic resin and epoxy resin are sensitive to temperature. Herein, iron-based amorphous powder cores with heat-resisting polytetrafluoroethylene (PTFE) insulating layers were fabricated by processes of ball-milling mixing, cold pressing, simultaneously sintering, and annea ...
DOI:
10.1007/s10853-022-07199-4

20. Novel ⁹⁰Sr analysis of environmental samples by Ion-Laser InterAction Mass Spectrometry [Erratum: September 2022, v.14(34); p.3355]

Author:
Maki Honda; Martin Martschini; Oscar Marchhart; Alfred Priller; Peter Steier; Robin Golser; Tetsuya K. Sato; Tsukada Kazuaki; Aya Sakaguch
Source:
Analytical methods 2022 v.14 no.28 pp. 2732-2738
ISSN:
1759-9679
Subject:
anion exchange resins,   etc   ; animals; chromatography; detection limit; mass spectrometry; radiology; separation; soil; Austria;     Show all 9 Subjects
Abstract:
... The sensitive analysis of ⁹⁰Sr with accelerator mass spectrometry (AMS) was developed to advance environmental radiology. One advantage of AMS is the ability to analyze environmental samples with ⁹⁰Sr/⁸⁸Sr atomic ratios of 10⁻¹⁴ in following a simple chemical separation. Three different IAEA samples with known ⁹⁰Sr concentrations (moss-soil, animal bone, Syrian soil: 1 g each) were analyzed to ass ...
DOI:
10.1039/d2ay00604a