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1. Achieving high out-of-plane thermal conductivity for boron nitride nano sheets/epoxy composite films by magnetic orientation

Author:
Yifan He; Fengxia Kuang; Zhanxun Che; Fangyuan Sun; Kun Zheng; Jingnan Zhang; Xinyu Cao; Yongmei Ma
Source:
Composites 2022 v.157 pp. 106933
ISSN:
1359-835X
Subject:
boron nitride; coprecipitation; epoxides; magnetic fields; nanosheets; polymers; surface area; thermal conductivity
Abstract:
... The preparation of boron nitride nanosheet (BNNS)/polymer composite films with high out-of-plane thermal conductivity (K) remains a challenge. Here, we obtained BNNS/epoxy (EP) resin composite films with well aligned BNNSs exhibiting a high K in the out-of-plane direction through the careful optimization of the magnetic field strength. Firstly, magnetically responsive BNNSs (m-BNNSs) with a large ...
DOI:
10.1016/j.compositesa.2022.106933

2. Adhesion Strengthening Mechanism of Carbon Nanotube-Embedded Epoxy Composites: A Fracture-Based Approach

Author:
Shuhuan Hu; Wei Huang; Fanchao Meng; Raymond H. W. Lam; Denvid Lau
Source:
ACS applied materials & interfaces 2022 v.14 no.5 pp. 7221-7229
ISSN:
1944-8252
Subject:
adhesion; carbon; carbon nanotubes; chromium; energy; epoxides; fluorescence; gold; microstructure; polymers; silicon
Abstract:
... Interfacial bonding integrity between different materials is critical to maintain the functionality of the entire physical system in any scale, ranging from building structures down to semiconductor transistors. For example, micro-patterned polymers embedded with conductive nanoparticles [e.g., carbon nanotubes (CNTs)] bonded with integrated circuits have been applied as many emerging chemical/bio ...
DOI:
10.1021/acsami.1c20282

3. Advanced functional materials based on bamboo cellulose fibers with different crystal structures

Author:
Qiuqin Lin; Peng Jiang; Suhong Ren; Shiqin Liu; Yaohui Ji; Yuxiang Huang; Wenji Yu; Gaëlle Fontaine; Serge Bourbigot
Source:
Composites 2022 v.154 pp. 106758
ISSN:
1359-835X
Subject:
bamboos; capacitance; cellulose; compression strength; energy; energy density; epoxides; hardness; pollution; tensile strength
Abstract:
... Degradable and sustainable materials are needed to reduce pollution and energy consumption. Bamboo, an inexpensive and abundant resource, can be used to develop such materials. To this end, we demonstrate two types of bamboo-fiber-based functional materials. The first can be used as structural materials with outstanding anti-mildew properties (ultra-high tensile strength: 571 MPa; compressive stre ...
DOI:
10.1016/j.compositesa.2021.106758

4. Advanced process simulations for thick-section epoxy powder composite structures

Author:
James M. Maguire; Nathan D. Sharp; R. Byron Pipes; Conchúr M. Ó Brádaigh
Source:
Composites 2022 v.161 pp. 107073
ISSN:
1359-835X
Subject:
carbon fibers; cost effectiveness; energy efficiency; epoxides; glass; wind turbines
Abstract:
... Numerical modelling is used to perform process simulations for thick-section composite laminates. Three forms of laminate are used to illustrate how thermal and cure gradients can be reduced by choice of thermal cycle. Low exotherm epoxy powders with the vacuum bag process have shown success in both glass and carbon fiber systems and the results presented in the present work show how the optimum t ...
DOI:
10.1016/j.compositesa.2022.107073

5. Agile Construction of Porous Organic Frameworks Pending Carboxylic Acids and Imidazolium-Based Ionic Liquids for the Efficient Fixation of CO₂ to Cyclic Carbonates

Author:
Yunlong Yang; Yuanlong Guo; Jili Yuan; Haibo Xie; Chengtao Gao; Tianxiang Zhao; Qiang Zheng
Source:
ACS sustainable chemistry & engineering 2022 v.10 no.24 pp. 7990-8001
ISSN:
2168-0485
Subject:
acylation; adsorption; carbon dioxide; carboxylic acids; catalytic activity; composite polymers; density functional theory; energy; epoxides; green chemistry; maleic anhydrides; moieties; porous media; styrene; surface area
Abstract:
... The design and facile preparation of ionic liquids (ILs)-functionalized polymer materials is a hot research topic due to their potential wide applications. Herein, taking the reaction advantage of a cyclic anhydride with an alcoholic compound to atom-economically generate a carboxyl ester pending a carboxylic acid moiety, porous organic framework (POF) materials pending carboxylic acids and imidaz ...
DOI:
10.1021/acssuschemeng.2c01660

6. Alizarin-functionalized organic-inorganic silane coatings for the development of wearable textile sensors

Author:
Valentina Trovato; Alessio Mezzi; Marco Brucale; Giuseppe Rosace; Maria Rosaria Plutino
Source:
Journal of colloid and interface science 2022 v.617 pp. 463-477
ISSN:
0021-9797
Subject:
alizarin; color; cotton; cotton fabric; deprotonation; durability; epoxides; glucose; pH; protonation; reflectance; silane; silica; temperature
Abstract:
... The broad detection properties of alizarin, not only concerning pH variations but also temperature, glucose and health-like relevant cations alterations, make it a molecule of great scientific interest, particularly for developing multifunctional wearable sensors. Herein, the alizarin red S dyestuff is bonded with trimethoxy-[3-(oxiran-2-ylmethoxy)propyl]silane, as a sol–gel precursor, to function ...
DOI:
10.1016/j.jcis.2022.03.006

7. Allosteric Regulation of the Soluble Epoxide Hydrolase by Nitro Fatty Acids: a Combined Experimental and Computational Approach

Author:
Qiongju Qiu; Giancarlo Abis; Florence Mattingly-Peck; Steven Lynham; Franca Fraternali; Maria R Conte
Source:
Journal of molecular biology 2022 pp. 167600
ISSN:
0022-2836
Subject:
Lewis acids; Lewis bases; amino acid sequences; central nervous system; chemical bonding; epoxide hydrolase; epoxides; fatty acids; humans; ligands; metabolism; molecular biology
Abstract:
... The human soluble epoxide hydrolase (hsEH) is a key regulator of epoxy fatty acid (EpFA) metabolism. Inhibition of sEH can maintain endogenous levels of beneficial EpFAs and reduce the levels of their corresponding diol products, thus ameliorating a variety of pathological conditions including cardiovascular, central nervous system and metabolic diseases. The quest for orthosteric drugs that bind ...
DOI:
10.1016/j.jmb.2022.167600

8. Amino acid functionalized boron nitride nanosheets towards enhanced thermal and mechanical performance of epoxy composite

Author:
Ni Wu; Wang Yang; Huawei Li; Sai Che; Can Gao; Bo Jiang; Zhengxuan Li; Chong Xu; Xiaobai Wang; Yongfeng Li
Source:
Journal of colloid and interface science 2022 v.619 pp. 388-398
ISSN:
0021-9797
Subject:
arginine; boron nitride; dispersibility; epoxides; hydrophilicity; hydrophobicity; lysine; nanosheets; phenylalanine; thermal conductivity; tryptophan
Abstract:
... The practical applications of boron nitride nanosheet (BNNS) are dramatically limited by the harsh exfoliation and surface functionalization conditions due to the hydrophobic and chemically inert nature. This issue can be improved by selecting efficient modifiers with hydrophilic groups. A green and scalable amino acid-assisted ball milling method is presented to exfoliate and functionalize BNNS s ...
DOI:
10.1016/j.jcis.2022.03.115

9. Anti-corrosion performance and mechanical properties of epoxy coatings containing microcapsules filled with linseed oil and modified ceria nanoparticles

Author:
B. Fotovvat; M. Behzadnasab; S.M. Mirabedini; H. Eivaz Mohammadloo
Source:
Colloids and surfaces 2022 v.648 pp. 129157
ISSN:
0927-7757
Subject:
calcium carbonate; cerium; corrosion; dielectric spectroscopy; emulsions; epoxides; glass transition temperature; linseed oil; nitrates; polymerization; urea formaldehyde; zirconium oxide
Abstract:
... In this study, the anti-corrosion and mechanical properties of epoxy coatings containing microcapsules filled with linseed oil and neat and modified ceria nanoparticles were evaluated. To this end, first, the surface of ceria nanoparticles was modified with Cerium (III) nitrate hexahydrate using different methods and then the corrosion resistance of linseed oil containing 1 wt% of nanoparticles wa ...
DOI:
10.1016/j.colsurfa.2022.129157

10. Anti–corrosion and self-healing coatings with polyaniline/epoxy copolymer–urea–formaldehyde microcapsules for rusty steel sheets

Author:
Rui Han; Haifeng He; Xin Liu; Lifen Zhao; Yvhao Yang; Cheng-bao Liu; Rong-Chang Zeng
Source:
Journal of colloid and interface science 2022 v.616 pp. 605-617
ISSN:
0021-9797
Subject:
Fourier transform infrared spectroscopy; composite polymers; corrosion; dielectric spectroscopy; durability; electrochemistry; energy-dispersive X-ray analysis; epoxides; oxidation; particle size; polyaniline; steel; thermogravimetry
Abstract:
... Polyaniline (PANI)/Epoxy copolymer as a core material was synthesized via a chemical oxidation method. Various analytical techniques, including scanning electron microscope, Fourier transform infrared spectroscopy, energy dispersive spectroscopy, thermogravimetry, and electrochemical impedance spectroscopy, were used to characterize the morphology, compositions, and self-healing and anticorrosion ...
DOI:
10.1016/j.jcis.2022.02.088

11. Architecture effects for mode I trans-laminar fracture in over-height compact tension tests: Damage propagation and fracture response

Author:
Tamas Rev; Tzachi Nachman; Ilya Kap; Ofir Shor; Noam Shemesh; David Mollenhauer; Daniel Rittel
Source:
Composites 2022 v.159 pp. 106987
ISSN:
1359-835X
Subject:
acoustics; carbon; digital images; epoxides; micro-computed tomography
Abstract:
... An experimental study was carried out to investigate the effect of material architecture on the damage evolution in carbon/epoxy composites through Overheight Compact Tension (OCT) tests. Four representative lay-ups were designed for both the unidirectional (UD) and woven-based laminates. Interrupted tests were carried out to characterise specimen damage using X-Ray Micro-Computed Tomography. Digi ...
DOI:
10.1016/j.compositesa.2022.106987

12. Atmospheric persistence and toxicity evolution for fluorinated biphenylethyne liquid crystal monomers unveiled by in silico methods

Author:
Yu Huang; Xiao Zhang; Chao Li; Yuanhui Zhao; Ya-nan Zhang; Jiao Qu
Source:
Journal of hazardous materials 2022 v.424 pp. 127519
ISSN:
0304-3894
Subject:
benzoic acid; computer simulation; epoxides; half life; hydrogen; liquid crystals; reaction mechanisms; toxicity
Abstract:
... It is essential to understand the atmospheric fate of liquid crystal monomers (LCMs), an important component in liquid crystal displays (LCDs); however, limited information is available at present. In this study, the atmospheric reaction mechanism, kinetics and toxicity evolution of three fluorinated biphenylethyne LCMs (1,2,3−trifluoro−5−(2−(4−methylphenyl)ethynyl)benzene (m−TEB), 1,2,3−trifluoro ...
DOI:
10.1016/j.jhazmat.2021.127519

13. Bio-based arginine surface-modified ammonium polyphosphate: an efficient intumescent flame retardant for epoxy resin

Author:
Chen Cheng; Yi Wang; Yanling Lu; Shaojie Li; Hua Li; Jun Yan; Shiguo Du
Source:
RSC advances 2022 v.12 no.15 pp. 9223-9237
ISSN:
2046-2069
Subject:
Fourier transform infrared spectroscopy; X-ray photoelectron spectroscopy; ammonium polyphosphates; arginine; calorimeters; carbon; carbonization; cation exchange; epoxides; fire safety; flame retardants; glass transition temperature; heat; nuclear magnetic resonance spectroscopy; oxygen; smoke; sustainable technology; thermogravimetry
Abstract:
... In this work, ammonium polyphosphate (APP) was surface-modified by bio-based arginine (Arg) for the first time to enhance its flame retardance for fire-safety epoxy resin (EP). The structure of Arg modified APP (Arg-APP) was characterized by Fourier transform infrared spectroscopy (FTIR), X-ray photoelectron spectroscopy (XPS), ¹H nuclear magnetic resonance (¹H-NMR), and scanning electron microsco ...
DOI:
10.1039/d1ra09459a

14. Bio-based epoxy resin from gallic acid and its thermosets toughened with renewable tannic acid derivatives

Author:
Jie Xu; Xiaohuan Liu; Shenyuan Fu
Source:
Journal of materials science 2022 v.57 no.20 pp. 9493-9507
ISSN:
0022-2461
Subject:
anhydrides; climate change; cost effectiveness; crosslinking; epichlorohydrins; epoxides; esterification; gallic acid; oils; tannins; tensile strength
Abstract:
... The designing of low-cost, high-performance, bio-based epoxy thermosets that can cope with the global oil crisis and climate change is a challenge. A bio-based epoxy resin was synthesized from gallic acid using epichlorohydrin, and a carboxylic acid-modified tannic acid (CATA) was obtained using simple esterification in which the gallic acid-based epoxy resin (GA-EP)/methyl nadic anhydride (MNA)/2 ...
DOI:
10.1007/s10853-022-07174-z

15. Bio-based phosphorus-containing benzoxazine towards high fire safety, heat resistance and mechanical properties of anhydride-cured epoxy resin

Author:
Jianfan Cao; Huajun Duan; Jiahao Zou; Junjun Zhang; Chao Wan; Chenhao Zhang; Huiru Ma
Source:
Polymer degradation and stability 2022 v.198 pp. 109878
ISSN:
0141-3910
Subject:
anhydrides; degradation; epoxides; fire safety; heat; heat tolerance; hydroxybenzaldehyde; oxygen; polymers; smoke
Abstract:
... Endowing anhydride-cured epoxy resin (EP) with excellent flame retardancy while maintaining good comprehensive properties has become a great challenge. In this context, a bio-based phosphorus-containing benzoxazine monomer (SFD-BOZ) composed of DOPO, furfurylamine, salicylaldehyde and paraformaldehyde was successfully synthesized via a two-step reaction, and then blended into EP/methyltetrahydroph ...
DOI:
10.1016/j.polymdegradstab.2022.109878

16. Biobased diglycidyl ether diphenolates: Effect of the ester moiety on fragrance oil microencapsulation by interfacial polymerization

Author:
Xue Wang; Anna-Christina Amason; Rebecca T. Miceli; Peng He; Yabin Lei; Ron Gabbard; Julie Ann Wieland; Robert J. Linhardt; David T. Corr; Richard A. Gross
Source:
Colloids and surfaces 2022 v.648 pp. 129243
ISSN:
0927-7757
Subject:
1,6-hexanediamine; acidification; bisphenol A; breast neoplasms; cell viability; chitosan; crosslinking; cytotoxicity; epoxides; ethylene glycol; fibroblasts; formaldehyde; humans; hydrophobicity; microencapsulation; moieties; odors; oils; oligosaccharides; polymerization; sonication; water solubility
Abstract:
... Health risks are associated with capsule-forming synthetic chemicals such as formaldehyde, isocyanates, and bisphenol A (BPA). This work is focused on using safe biobased molecules to build capsule walls for oil encapsulation. Cellulose-derived diphenolic acid was converted into a series of diglycidyl ether n-alkyl diphenolates (DGEDP-esters). Interfacial polymerization of oil-soluble DGEDP-esters ...
DOI:
10.1016/j.colsurfa.2022.129243

17. Biocarbonates Derived from CO₂ and Terpenes: Molecular Design for Aqueous Mixture Treatment Driven by COSMO-RS

Author:
Alejandro Belinchón; Elisa Hernández; Javier Vázquez; Rubén Santiago; Cristian Moya; Marcos Larriba; Pablo Navarro; José Palomar
Source:
ACS sustainable chemistry & engineering 2022 v.10 no.29 pp. 9635-9643
ISSN:
2168-0485
Subject:
acetic acid; carbon dioxide; cycloaddition reactions; databases; epoxidation reactions; epoxides; furfural; green chemistry; models; molecular dynamics; phenol; solvents; terpenoids; value added
Abstract:
... In this work, the use of plant-derived raw materials, such as terpenes, gives great strength from a sustainability perspective and enables dealing with the biocarbonate concept. Biocarbonates are produced only from CO₂ and residues or bio-derived compounds, describing cycloaddition reactions that couple CO₂ and a terpene, the latter after epoxidation, avoiding environmental charges from petroleum- ...
DOI:
10.1021/acssuschemeng.2c02993

18. Biodegradable Copolymers from CO₂, Epoxides, and Anhydrides Catalyzed by Organoborane/Tertiary Amine Pairs: High Selectivity and Productivity

Author:
Jiaxin Liang; Shuxian Ye; Siyuan Wang; Shuanjin Wang; Dongmei Han; Sheng Huang; Zhiheng Huang; Wei Liu; Min Xiao; Luyi Sun; Yuezhong Meng
Source:
Macromolecules 2022 v.55 no.14 pp. 6120-6130
ISSN:
1520-5835
Subject:
biodegradability; carbon dioxide; carbonates; catalysts; catalytic activity; composite polymers; copolymerization; cyclohexenes; epoxides; glass transition; molecular weight; phthalic anhydride; propylene oxide; triethylamine
Abstract:
... Copolymerization of epoxides and carbon dioxide (CO₂) with cyclic anhydrides has been developed to be a facile route to obtain biodegradable poly(ester-co-carbonate)s with diversified structures. Metal-free Lewis acid–base pairs emerging in recent years have offered great opportunities for preparing polymers without metal residuals. Herein, the scope of Lewis bases is extended to the tertiary amin ...
DOI:
10.1021/acs.macromol.2c01118

19. Biodegradable epoxy resin from vanillin with excellent flame-retardant and outstanding mechanical properties

Author:
Jinpeng Ma; Guanxi Li; Xueni Hua; Ning Liu; Zhe Liu; Fan Zhang; Liangliang Yu; Xue Chen; Lei Shang; Yuhui Ao
Source:
Polymer degradation and stability 2022 v.201 pp. 109989
ISSN:
0141-3910
Subject:
biodegradability; bisphenol A; crosslinking; degradation; epoxidation reactions; epoxides; flame retardants; heat; mechanical properties; oxygen; polymers; schiff bases; smoke; vanillin
Abstract:
... In this work, the sustainable and biodegradable flame retardant epoxy resin was designed and prepared to replace resource-limited petrochemicals, especially, bisphenol A type epoxy resin (DGEBA). A renewable chemical, vanillin was condensation to produce Schiff-based compound (MAV) employing the novel epoxy resin (MVE) through the epoxidation reaction. The epoxy equivalent of MVE was approximately ...
DOI:
10.1016/j.polymdegradstab.2022.109989

20. Bio‐based nickel alginate toward improving fire safety and mechanical properties of epoxy resin

Author:
Chang Liu; Ping Li; Ying-Jun Xu; Yun Liu; Ping Zhu; Yu-Zhong Wang
Source:
Polymer degradation and stability 2022 v.200 pp. 109945
ISSN:
0141-3910
Subject:
alginates; degradation; epoxides; fire safety; flame retardants; heat; impact strength; nickel; polymers; smoke; sustainable development; temperature; thermal stability; thermogravimetry; toxicity
Abstract:
... Preparing higher fire safety performance epoxy resin (EP) with bio-based flame-retardants is important for sustainable development. Herein, the effects of nickel alginate on thermal stability, fire safety and mechanical properties for EP had been investigated. Thermogravimetric analysis results indicated that nickel alginate endowed a significant improvement on thermal stability at the higher temp ...
DOI:
10.1016/j.polymdegradstab.2022.109945