RSC Advances
·
2016
·Vol. 6
·期 67
·62999-63005
·
IF 3.289
Caiying Bo,Shikang Wei,Lihong Hu,Puyou Jia,Bingchuang Liang,Jing Zhou,Yonghong Zhou
A cardanol-based P-containing polyurethane prepolymer (PPUP), a novel cardanol derivative, was synthesized. Its structure was confirmed by Fourier transform infrared spectrometry and 1H nuclear magnetic resonance. Then phenolic foams (PFs) modified with different contents of PPUP were prepared. The addition of PPUP improves the compressive and specific strengths of the foams, while appropriate addition of PPUP into the resin matrix enhances the specific compressive and flexural strength of PFs. Incorporation of PPUP into PFs leads to a reduced pulverization ratio. The limiting oxygen index increases continuously with the increasing addition of PPUP into PFs. Analysis of thermal decompositions shows that the modified PFs have a similar thermal resistance to pristine foam.
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
Surface Topography-Metrology and Properties
·
2019
·Vol. 7
·期 4
·044002
·
IF 2.439
Juan Wang,Peng Du,Jiheng Ding,Jibin Pu,Baosheng Xie
Conventional self-emulsified curing agent mainly focus on its stability, yet the contamination of raw materials are scarcely noted. Herein, a waterborne cardanol-based epoxy resin curing agent with emulsifying function was prepared by using the natural renewable biological material cardanol, and a waterborne biological epoxy resin coating was obtained by curing epoxy resin E51. The dual-functional product was synthesized by a two-process reaction (Mannich reaction and ring-opening reaction), as proved via FTIR and NMR techniques. In the curing process, the long alkyl chain in the curing agent molecule can shield the hydrophilic chain, thus improving the hydrophobicity and corrosion resistance of waterborne epoxy resin coating. With the help of this curing agent, graphene oxide (GO) is further used to improve the barrier effect of waterborne epoxy resin coating. The electrostatic interaction among curing agent, epoxy resin and GO improve the stacking dispersion and compatibility of GO in the coating. When the addition amount was 0.5 wt%, the thermal stability of the coating improved and the defects also reduced. The excellent corrosion resistance of the composite coating was verified by EIS. The results suggest that it is a potential candidate low-volatile organic compounds coatings for extending service life of metallic materials.
研究领域:
材料科学
·
化学工程
·
可持续发展
✓ 已验证
产品关联
DOI
高影响因子
RSC Advances
·
2016
·Vol. 6
·期 107
·105744-105754
·
IF 3.289
Zhe Ma,Bing Liao,Kun Wang,Yongqiang Dai,Jianheng Huang,Hao Pang
Two new flexible cardanol-based epoxy curing agents with cross-linkable thiourea groups ([2-(2-amino-ethylamino)-ethyl]-thiourea of modified cardanol and [2-(2-amino-ethylamino)-ethyl]-thiourea of modified cardanol 2,3-dihydroxy propyl ether, ETC and TCP for short, respectively) were synthesized using a Mannich reaction. The structure of the prepared curing agents was analyzed by a nuclear magnetic resonance (NMR) and Fourier transform infrared spectroscopy (FT-IR). The curing kinetics of ETC (or TCP) cured diglycidyl ether of biphenyl A (DGEBA) epoxy resins was investigated using the Kissinger, Flynn–Wall–Ozawa and Crane methods by non-isothermal differential scanning calorimetry (DSC). Thermal properties of the cured epoxy resins were evaluated with thermogravimetric analysis (TGA) and DSC. The morphology and mechanical properties of the cured epoxy resins were also studied. The results showed that the epoxy curing agents had a high-reactivity and a low-viscosity, especially at low temperatures. The activation energy of ETC/DGEBA and TCP/DGEBA calculated by the Kissinger method were 53.6 and 60.5 kJ mol−1, respectively. The toughness of the cured epoxy resin was noticeably improved by the introduction of two new flexible curing agents. The glass transition temperature (Tg) decreased with the introduction of cardanol-based curing agents in an epoxy resin system. In addition, the cured epoxy materials exhibited good mechanical properties.
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
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2021
·
IF 6.953
Guifeng Liu,Can Jin,Shuping Huo,Zhenwu Kong,Fuxiang Chu
A series of lignin-based epoxy resins (LEPs) were prepared by the reaction of epichlorohydrin with lignin oligomers derived from partial reductive depolymerization of lignin. To overcome the high viscosity and brittleness defects in practical applications, the LEPs were blended with renewable epoxied cardanol glycidyl ether (ECGE) and then cured with methyltetrahydrophthalic anhydride (MeTHPA) to form high-performance epoxy thermosets. The effects of degree of lignin depolymerization , chemical composition of lignin oligomers and dosage of ECGE on thermal and mechanical properties of the cured products were investigated. The LEP/MeTHPA thermosets exhibited good thermal and mechanical properties. Especially, by separating monomer-rich fractions from lignin oligomers, the thermal and mechanical properties of the cured product were improved obviously. Notably, the incorporation of ECGE also possessed a positive effect on reinforcing and toughening the cured products. With 20 wt% ECGE loadings, the tensile, flexural and impact strength of the cured product reached the maximum value of 77 MPa, 115 MPa and 14 kJ/m 2 , respectively, which were equivalent to the commercial bisphenol A epoxy resins thermosets. These findings indicated that the novel bio-based epoxy resins from lignin oligomers and cardanol could be utilized as renewable alternatives for BPA epoxy resins.
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
JOURNAL OF POLYMERS AND THE ENVIRONMENT
·
2022
·Vol. 30
·期 8
·3270-3278
·
IF 4.705
Chu Hong-ying,Li Hua-bei,Sun Xiao-yan,Zhang Yao-wang
In this paper, we synthesized a kind of bio-based plasticizer epoxidized linoleic acid cardanol ester (ELCE) from cardanol and linoleic acid. Its chemical structure was characterized with FT-IR and 1 H NMR. Polyvinyl chloride (PVC) blends plasticized with ELCE were prepared via thermoplastic blending with torque rheometer. The performance including torque, mechanical property, thermal stability, plasticizing property and migration resistance of plasticized PVC blends were investigated and compared with plasticized PVC blends with commercial plasticizer dioctyl phthalate (DOP). The results showed that ELCE improved thermal stability of PVC blends. ELCE played more excellent plasticizing effect on PVC blends than DOP. The better solvent extraction resistance and volatile resistance of ELCE make it possible to completely replace DOP in PVC products.
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
ACS Omega
·
2020
·
IF 2.87
Muhammad Ali,Yunhua Lu,Saad Ahmed,Santosh Khanal,Shiai Xu
This study represents the first attempt to prepare a novel cardanol-based plasticizer. Modified cardanol (MC, i.e., phosphorylated cardanol) containing nitrogen and phosphoric acid groups was synthesized and then incorporated into polyvinyl chloride (PVC) as the secondary plasticizer for partial substitution of dioctyl phthalate (DOP). The molecular structure of MC was characterized by Fourier transform infrared spectroscopy, 1H nuclear magnetic resonance (NMR), and 31P NMR spectroscopy. The thermal degradation behavior, mechanical performance, and compatibility of MC were also investigated. The substitution of DOP with MC enables PVC blends to have higher thermal stability, tensile strength, and leaching resistance. The tensile strength is increased from 17.7 MPa for DOP/PVC blend (MC-0) to 25.7 MPa for MC/PVC blend (MC-4), and the elongation at break is increased from 256 to 432%, respectively. The microstructure of the tensile fractured surface was studied by scanning electron microscopy. The results show that the addition of MC allows PVC blends to have well-balanced properties of flexibility and strength and excellent migration resistance.
研究领域:
材料科学
·
化学工程
✓ 已验证
DOI
高影响因子
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
·
2014
·
IF 2.235
Zhu Xiong,Xinyan Dai,Ruoyu Zhang,Zhaobin Tang,Haining Na,Jin Zhu
A biobased monofunctional compatibilizer (called Epicard) is first synthesized by the reaction of cardanol with epichlorohydrin as confirmed by Fourier transform infrared and 1H NMR. Subsequently, biosourced polymers, polylactide (PLA) and starch, are melt-blended by a twin-screw extruder with Epicard. Confirmed by the measurements of contact angle and 1H nuclear magnetic resonance of the extracted starches from PLA/starch/Epicard blends, the Epicard only possesses a monoepoxy group to mainly react with starch and then increased the hydrophobicity of the starches during the melt-blending process. As a result, an obvious improvement to the interfacial adhesion between starch and PLA is observed by the scanning electron microscopy. Furthermore, the tensile properties of PLA/starch blends are effectively improved with the addition of Epicard. This study suggests a simple but effective material technique by utilizing a novel plant oil modifier to increase interfacial adhesion in fabricating fully biobased PLA/starch blends with superior tensile properties.
研究领域:
材料科学
·
高分子化学
✓ 已验证
DOI
高影响因子
Materials Today Communications
·
2025
·
IF 4.5
Zichen Shi,Zongao Dou,Xiaopeng Sun,Xiao Wu,Zhiqiang Wang,Jing Sun,Qiang Fang
Based on our previous discovery that alkyl-side-chains in the aryl polymers have a positive effect on dielectric properties of the polymers, this work further investigates the side-chain effect by a hydrogenated bio-based cardanol monomer with a long pentadecyl alkyl side chain. The monomer was functionalized by introducing the thermocrosslinkable benzocyclobutene groups, and its cured product displayed a dielectric constant ( ε ) of 2.59 and a dielectric loss ( tan δ ) of 5×10 -4 at a high frequency of 10 GHz. In contrast, a controlling polymer with methyl side chain exhibited a ε of 2.84 and a tan δ of 1.4×10 -4 , respectively. Such data indicate that the long alkyl-side-chains can effectively improve the dielectric properties of the aryl polymers. Moreover, the cured hydrogenated bio-based cardanol also exhibited good hydrophilic properties with the water absorption of 0.16% even immersing it in boiling water for 96 h. These results imply that bio-based cardanol is a potential candidate for the preparation of the low- k materials used in microelectronic industry.
✓ 已验证
产品关联
DOI
高影响因子
EUROPEAN POLYMER JOURNAL
·
2026
·
IF 6.8
Gang Tang,Jiali Huang,Rui Wang,Xin Wang,Xiuyu Liu,Bin Fei,Yixin Hu
Epoxy resin is one of the most important thermosetting resins at present, and it is widely used in various industrial fields because of its excellent properties. However, most of the hardeners used in traditional epoxy resins are derived from petroleum resources, which are accompanied by problems such as greenhouse gas emissions and environmental pollution. In addition, epoxy resin also has the disadvantage of being brittle. Therefore, it is of great significance to develop new environmentally friendly bio-based curing agents to toughen epoxy resins. Phosphorus-containing cardanol-based hardeners with adjustable functional groups were designed and synthesized. First, three kinds of cardanol-phenolic resins (P1C1F, P2C1F and P3C1F) with different molar ratios were synthesized by Mannich reaction using phenol, formaldehyde solution and cardanol as raw materials. Then, three kinds of phosphorus-containing cardanol-based hydroxyl type hardeners (P1C1F-0.6DCP, P2C1F-0.6DCP and P3C1F- 0.6DCP) were synthesized by partial substitution reaction with diphenyl chlorophosphate as a raw material. These three kinds of hardeners were used to cure DGEBA and compared with DGEBA/DDM. The tensile test results showed that the elongation at break of DGEBA/P1C1F-0.6DCP, DGEBA/P2C1F-0.6DCP and DGEBA/P3C1F-0.6DCP increased from 2.9% (DGEBA/DDM) to 54.5%, 45.9% and 27.1%, respectively. The impact test results further showed that the impact strength of DGEBA/P1C1F-0.6DCP, DGEBA/P2C1F-0.6DCP and DGEBA/P3C1F-0.6DCP were 42.2%, 106.9% and 91.2% higher than that of DGEBA/DDM, respectively. The results of vertical combustion and limiting oxygen index showed that DGEBA/P1C1F-0.6DCP, DGEBA/P2C1F-0.6DCP and DGEBA/P3C1F-0.6DCP passed the V-0 level and their LOI values were around 29%. In addition, compared with DGEBA/DDM coating, DGEBA/P3C1F-0.6DCP coating showed better corrosion resistance. Phosphorus-containing cardanol-based hardeners were one kind of promising components for the fabrication of epoxy coatings with excellent toughness and anti-corrosive performance.
✓ 已验证
DOI
高影响因子
JOURNAL OF MOLECULAR LIQUIDS
·
2019
·
IF 4.561
Jingyi Ma,Na Liu,Mengen Huang,Limin Wang,Jianwei Han,Hui Qian,Fei Che
As new biomass derived raw material, cardanol has attracted the attention of numerous academic and industrial groups due to its renewability and unique structural features. In this work, seven cardanol-derived quaternary ammonium compounds (QACs) were synthetized with their physicochemical properties and antimicrobial ability evaluated. The surface tension was measured in aqueous medium by the platinum ring method, 2b has the optimal surface activities, which is considerably better than commercialized QAC product cetyltrimethylammonium bromide . Both broth dilution method and agar dilution method were used to obtain the MIC and MBC values of the targeted QACs. 1a , 1b , 2b inhibit the tested bacterial at a concentration of 32 μg/mL. Scanning electron microscopy (SEM) results intuitively showed that the QACs could interact with the bacterial cell membrane, for disrupting the integrity of the membrane. Meanwhile, it was found that the antimicrobial activity depended not only on the alkyl chain length, but also on the CMC value. To sum, seven cardanol-derived QACs were synthetized easily, which showed excellent surface activities and antimicrobial activity, as a promising alternative to the existing fossil fuel derived cationic surfactants and antiseptics.
研究领域:
化学
·
生物学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Bio Materials
·
2020
·
IF 0
Jiawen Chen,Kexin Chen,Qinglin Li,Guofa Dong,Jie Ai,Haiqing Liu,Qinhui Chen
Janus particles with obvious chemical compartition can perform their functions independently, so they have attracted much attention in biomedical materials. Herein, a mesoporous silica/silver Janus nanoparticle modified with cardanol (C-MSN@Ag) was designed and synthesized via redox and click chemical reactions and was further evaluated as a highly efficient hemostatic dressing. This Janus structure endowed C-MSN@Ag with both prominent hemostatic and antibacterial performance. The hemostatic time of C-MSN@Ag on rat liver laceration was up to 40% shorter than that of MSN and MSN@Ag because of adhesion of phenolic compounds on the tissue and the blocking effect of the hydrophobic alkyl chains from cardanol. Besides, C-MSN@Ag could promote coagulation by forming a three-dimensional network with fibrin more quickly than MSN and MSN@Ag. Additionally, due to the released silver ions and phenolic hydroxyl groups of cardanol, C-MSN@Ag exhibited a broad-spectrum antibacterial rate (∼99%) against both Escherichia coli and Staphylococcus aureus. C-MSN@Ag also possessed non-cytotoxicity. This work not only provides a way for the fabrication of silica-based Janus hemostatic agents by the atom-economical click reaction but also gives a direction for the application of the sustainable naturally occurring cardanol.
研究领域:
生物医学材料
·
纳米医学
·
药物化学
✓ 已验证
产品关联
DOI
PubMed
JOURNAL OF APPLIED POLYMER SCIENCE
·
2017
·Vol. 134
·期 23
·
IF 1.86
Leilei Yao,Qinhui Chen,Wenqin Xu,Zhibin Ye,Zhaodi Shen,Meijin Chen
In recent years, the using of reproducible resource and economical and efficient synthesis method has got wide concern. Herein, an environmental-friendly plasticizer originated from cardanol was synthesized by click chemistry. First, the cardanol sulfide (CS) was obtained by click chemistry reaction between the double bond of the side chain of cardanol and mercaptoethanol. The degree of the click reaction was estimated to reach 84.7% by testing the content of sulfur. Then, the epoxidation of the hydroxyl was performed to get cardanol based epoxy plasticizer (CEP) in the presence of epichlorohydrin. The epoxy value was 0.32. The structure of CS and CEP was confirmed by FT-IR and NMR techniques. A Haake torque rheometer was used to research the action of CEP on polyvinyl chloride (PVC). Results showed that it possessed favorable plasticization effect and stabilization effect on PVC. CEP had good heat stabilization in PVC, and could decrease the T g of PVC significantly. Moreover, CEP could increase the tensile strength of PVC when in a small amount, and could increase the plasticity of PVC when in a larger quantity significantly. The characteristics of volatile, migration and solvent extraction of PVC plasticized by CEP is similar to by dioctyl phthalate (DOP). © 2017 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2017 , 134 , 44890.
研究领域:
材料科学
·
高分子化学
·
环境化学
✓ 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）