JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
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2023
·
IF 10.9
Xue-Lian Chen,Fu-Rong Zeng,Wen-Xiong Li,Lin Zhang,Cong Deng,Yi Tan,Ming-Jun Chen,Sheng-Chao Huang,Bo-Wen Liu,Yu-Zhong Wang,Hai-Bo Zhao
Bio-based polyurethane foam has attracted increasing attentions due to eco-friendliness and fossil feedstock issues. However, the inherent flammability limits its application in different fields. Herein, we demonstrate a green bio-based flame-retardant system to fabricate polyurethane foam composite with durable flame retardancy, smoke suppression, and thermal insulation property. In this system, the green bio-based polyol (VED) with good reactivity and compatibility plays a role of flame retardant and EG acts as a synergistic filler. As a result, the LOI value of foam composite increased to 30.5 vol.% and it achieved a V-0 rating in the UL-94 vertical burning test. Additionally, the peak heat release rate (pHRR) and the total smoke production (TSP) decreased by 66.1% and 63.4%, respectively. Furthermore, the foam composite maintained durable flame retardancy after accelerated thermal aging test, whose thermal-insulating property was maintained even after being treated in high-humidity environment with 85% R.H. for a week. This work provides a facile strategy for durable flame retardancy and long-term thermal insulation performance, and creates opportunities for the practical applications of bio-based foam composites.
研究领域:
材料科学
·
环境科学
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产品关联
DOI
高影响因子
JOURNAL OF POLYMER RESEARCH
·
2014
·Vol. 21
·期 7
·1-7
·
IF 1.897
Chang Ruixue,Qin Jianglei,Gao Jungang
In this study, isosorbide diglycidyl ether (isosorbide epoxy) was cured by a
variety of biobased curing agent of terpene maleic anhydride (TMA) and maleopimaric
acid (MPA) to prepare fully biobased epoxy resins. The structures of isosorbide
epoxy and biobased curing agents were synthesized and characterized by NMR. The
non-isothermal curing kinetics of fully biobased epoxies were studied using
differential scanning calorimetry (DSC). The bis-phenol A type epoxy and petroleum
based curing agent methyl Nadic anhydride (MNA) bearing similar caged structure was
also studied for comparison. The mechanical properties of the biobased epoxy resins
were evaluated using dynamic mechanical analysis (DMA) and the thermal stability was
characterized by thermogravimetric analysis (TGA), respectively. The fully biobased
epoxies have comparable or even better mechanical properties and thermal stability
than the biophenol A type epoxies cured by petroleum based curing agents, showing
that the biobased isosorbide epoxies have great potential application as substitute
for those petroleum based epoxies.
研究领域:
材料科学
·
化学工程
✓ 已验证
DOI
高影响因子
Coatings
·
2018
·Vol. 8
·期 3
·88
·
IF 2.35
Jinyue Dai,Shimin Yang,Na Teng,Yuan Liu,Xiaoqing Liu,Jin Zhu,Jun Zhao
In this work, several bio-based main-chain type benzoxazine oligomers (MCBO) were synthesized from eugenol derivatives via polycondensation reaction with paraformaldehyde and different diamine. Afterwards, their chemical structures were confirmed by Fourier Transform Infrared Spectroscopy (FT-IR) and Nuclear Magnetic Resonance Spectroscopy (1H-NMR). The curing reaction was monitored by Differential Scanning Calorimetry (DSC) and FT-IR. The polybenzoxazine films were prepared via thermal ring-opening reaction of benzoxazine groups without solvent, and their thermodynamic properties, thermal stability, and coating properties were investigated in detail. Results indicated that the cured films exhibited good thermal stability and mechanical properties, showing 10% thermal weight loss (Td10%) temperature as high as 408 °C and modulus at a room temperature of 2100 MPa as well as the glass transition temperature of 123 °C. In addition, the related coatings exhibited high hardness, excellent adhesion, good flexibility, low moisture absorption, and outstanding solvent resistance.Keywords:bio-based;benzoxazine;eugenol;coatings
研究领域:
材料科学
·
化学工程
✓ 已验证
DOI
高影响因子
Polymers
·
2016
·Vol. 8
·期 9
·314
·
IF 2.944
Xiaoma Fei,Fangqiao Zhao,Wei Wei,Jing Luo,Mingqing Chen,Xiaoya Liu
Toughening an epoxy resin by bio-based modifiers without trade-offs in its modulus, mechanical strength, and other properties is still a big challenge. This paper presents an approach to modify epoxy resin with tannic acid (TA) as a bio-based feedstock. Carboxylic acid-modified tannic acid (TA–COOH) was first prepared through a simple esterification between TA and methylhexahydrophthalic anhydride, and then used as a modifier for the epoxy/anhydride curing system. Owing to the chemical modification, TA–COOH could easily disperse in epoxy resin and showed adequate interface interaction between TA–COOH and epoxy matrix, in avoid of phase separation. The use of TA–COOH in different proportions as modifier of epoxy/anhydride thermosets was studied. The results showed that TA–COOH could significantly improve the toughness with a great increase in impact strength under a low loading amount. Moreover, the addition of TA–COOH also simultaneously improved the tensile strength, elongation at break and glass transition temperature. The toughening and reinforcing mechanism was studied by scanning electron microscopy (SEM), dynamic mechanical analysis (DMA) and thermal mechanical analysis (TMA), which should be owned to the synergistic effect of good interface interaction, aromatic structure, decreasing of cross linking density and increasing of free volume. This approach allows us to utilize the renewable tannic acid as an effective modifier for epoxy resin with good mechanical and thermal properties.Keywords:tannic acid;epoxy resin;bio-based;toughening
研究领域:
材料科学
·
化学工程
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产品关联
DOI
PubMed
高影响因子
Polymers
·
2021
·Vol. 13
·期 4
·666
·
IF 4.329
Xi Yu,Chuang Dong,Wei Zhuang,Dongjian Shi,Weifu Dong,Mingqing Chen,Daisaku Kaneko
We suggest a simple idea of bio-based adhesives with strong adhesion even under water. The adhesives simply prepared via polycondensation of 3,4-dihydroxyhydrocinnamic acid (DHHCA) and lactic acid (LA) in one pot polymerization. Poly(DHHCA-co-LA) has a hyperbranched structure and demonstrated strong dry and wet adhesion strength on diverse material surfaces. We found that their adhesion strength depended on the concentration of DHHCA. Poly(DHHCA-co-LA) with the lowest concentration of DHHCA showed the highest adhesion strength in water with a value of 2.7 MPa between glasses, while with the highest concentration of DHHCA it exhibited the highest dry adhesion strength with a value of 3.5 MPa, which was comparable to commercial instant super glue. Compared to underwater glues reported previously, our adhesives were able to spread rapidly under water with a low viscosity and worked strongly. Poly(DHHCA-co-LA) also showed long-term stability and kept wet adhesion strength of 2.2 MPa after steeping in water for 1 month at room temperature (initial strength was 2.4 MPa). In this paper, Poly(DHHCA-co-LA) with strong dry and wet adhesion properties and long-term stability was demonstrated for various kinds of applications, especially for wet conditions.Keywords:bio-based;wet adhesion;bio-inspired;hot melt adhesive
研究领域:
材料科学
·
生物化学
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产品关联
DOI
PubMed
高影响因子
Materials
·
2023
·Vol. 16
·期 4
·1604
·
IF 3.4
Yue Jiang,Shuai Wang,Weifu Dong,Tatsuo Kaneko,Mingqing Chen,Dongjian Shi
Carbon fiber (CF) is widely used in the preparation of carbon-fiber-reinforced polymer composites (CFRP) in which it is combined with epoxy resin due to its good mechanical properties. Thermosetting bisphenol A epoxy resin, as one of the most common polymer materials, is a non-renewable resource, leading to a heavy environmental burden and resource waste. To solve the above problems and achieve high mechanical and thermal properties comparable to those of bisphenol A, herein, a high-performance, degradable and recyclable bio-based epoxy resin was developed by reacting the lignin derivative vanillin with 4-amino cyclohexanol via Schiff base. This bio-based epoxy resin showed a Young’s modulus of 2.68 GPa and tensile strength of 44 MPa, 36.8% and 15.8% higher than those of bisphenol A epoxy, respectively. Based on the reversible exchange reaction of the imine bond, the resin exhibited good degradation in an acidic environment and was recoverable by heat treatment. Moreover, the prepared epoxy resin could be used to prepare carbon fiber (CF)-reinforced composites. By washing off the epoxy resin, the carbon fiber could be completely recycled. The recovered carbon fiber was well preserved and could be used again for the preparation of composite materials to realize the complete recovery and utilization of carbon fiber. This study opens a way for the preparation of high-performance epoxy resin and the effective recycling of carbon fiber.Keywords:epoxy resin;degradable;recycled;bio-based
研究领域:
材料科学
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环境科学
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产品关联
DOI
PubMed
高影响因子
ACS Applied Polymer Materials
·
2024
·
IF 4.4
Hongsheng Wang,Shishuai Gao,Yitong Xie,Xiaoyu Shi,Chenhuan Lai,Daihui Zhang,Chunpeng Wang,Fuxiang Chu
The development of sustainable and recyclable adhesives simultaneously requiring high strength and ductility is challengeable. Herein, we synthesized furan ring-containing copolyesters as sustainable, strong, and tough adhesives. FTIR and 1H NMR analyses confirmed the successful synthesis of copolyesters. Furthermore, structures and physiochemical properties of copolyesters were easily tunable by varying the feeding ratio of comonomers. The obtained copolyesters exhibited several interesting features as adhesives, which synergistically resulted in superior adhesion behavior, including high adhesion strength (12.60 MPa), satisfactory toughness (work of debonding = 2623 N m–1), wide temperature adaptability (adhesion strength = 8.23 MPa at −70 °C and 3.83 MPa at 100 °C), and excellent solvent resistance (9.27 MPa of adhesion strength in N,N-dimethylformamide after 24 h). The present work significantly advances and provides perspectives on the design of strong and tough sustainable adhesives.
研究领域:
材料科学
·
绿色化学
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产品关联
DOI
高影响因子
POLYMERS FOR ADVANCED TECHNOLOGIES
·
2022
·Vol. 33
·期 7
·2265-2275
·
IF 3.348
Xuan Fei,Yingkang Zhu,Jinggang Wang,Zhen Jia,Xiaoqing Liu
To enhance the crystallization of poly(butylene 2,5-furandicarboxylate) (PBF) thus substitute its petroleum-based analogue poly(butylene terephthalate) (PBT), a series of high molecular weight poly(butylene-co-1,4-cyclohexanedimethylene 2,5-furandicarboxylate) (PBCF) copolyesters with low contents (0–19 mol%) of 1,4-butanediol (BDO) are synthesized from 2,5-furandicarboxylic acid (FDCA), 1,4-cyclohexanedimethylene (CHDM) and BDO. Their chemical structures and compositions are confirmed by nuclear magnetic resonance ( 1 H NMR and 13 C NMR). Their number average molecular weights are from 20,500 to 36,100 g/mol with the polydispersity index ( Ð ) of 1.67–1.99. The thermal stability and crystallization behaviors are investigated by thermogravimetric analyzer (TGA) and differential scanning calorimeter (DSC). Results show that PBCFs demonstrate comparable crystallization rate to PBT as the crystallization half time is from 18 to 29 s and the melting enthalpy is 34.1–41.4 J/g as well as the higher melting temperature of 238–263°C than 225°C for PBT. In addition, PBCFs exhibit excellent mechanical properties of tensile modulus between 1220 and 1510 MPa. These investigations suggest that a moderate amount CF unit can improve the melting temperature and enhance the originally weak crystallizability of furan-based polyesters. Generally, PBCFs can be the engineering plastic with satisfied thermal and mechanical performance.
研究领域:
材料科学
·
化学工程
✓ 已验证
DOI
高影响因子
Polymers
·
2018
·Vol. 10
·期 3
·282
·
IF 2.935
Qiang Zhang,Xueqin Zhang,Ziyan Zhu,Aiping Zhang,Chunhui Zhang,Xiaoying Wang,Chuanfu Liu
Esterification is a versatile way to produce the derivatives of lignocellulose with developed properties. However, the traditional heterogeneous esterification of lignocellulose suffered from the drawbacks of low efficiency, additional reaction medium and heating. In the present study, an efficient method was developed to produce the functionalized sugarcane bagasse (SCB) by ball milling without any additional solvents and heating. The effects of pulverization time, rotation speed, the kind of linear chain anhydrides, the ratio of anhydrides to SCB, with or without pyridine catalyst and the dosage of catalyst were investigated on weight percent gain (WPG) of SCB esters. The results indicated that the high efficiency of this mechanocatalystic esterification was probably due to the destroyed crystalline structure and the promoted penetration of the esterifying reagent onto SCB bulk caused by ball milling. The maximumWPGof SCB acetate, propionate and butyrate reached 33.3%, 33.6% and 32.4%, respectively. The physicochemical structure of the esterified SCB was characterized with Fourier transform infrared spectra (FT-IR), solid state cross-polarized magic angle spinning13C nuclear magnetic resonance (CP/MAS13C-NMR), X-ray diffraction (XRD), scanning electron microscopy (SEM) and thermogravimetric analysis (TGA). The direct evidence of the esterification occurrence was provided with FT-IR and solid-state CP/MAS13C-NMR. The thermal stability of SCB increased upon the mechanocatalytic esterification. The results implied that the relatively homogeneous modification was achieved with this semi-homogeneous esterification method by ball milling.Keywords:sugarcane bagasse;esterification;ball milling;bio-based materials
研究领域:
生物质化学
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材料科学
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产品关联
DOI
PubMed
高影响因子
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2022
·
IF 8.025
Xiaoxiao Ma,Shugang Zhang,Yuechao Yang,Zhaohui Tong,Tianlin Shen,Zhen Yu,Jiazhuo Xie,Yuanyuan Yao,Bin Gao,Yuncong C. Li,Mohamed I.D. Helal
Bio-based controlled release fertilizers (BCRFs) are cost-effective and renewable thus gradually replacing petroleum-based controlled release fertilizers (CRFs). However, most of the study mainly focused on modifying BCRFs to improve controlled-release performance. It is necessary to further increase the functionality of BCRF for expanding the application. A multifunctional double layered bio-based CRF (DCRF) was prepared. Urea was used as the core of fertilizer, bio-based polyurethane was used as the inner coating, and sodium alginate and copper ions formed the hydrogel as the outer coating. In addition, mesoporous silica nanoparticles loaded with sodium selenate was used to modify the sodium alginate hydrogel (MSN@Se hydrogel). The results showed that the nitrogen longevity of the DCRF was much better than that of urea and BCRF. The selenium nutrient longevity of the DCRF was 40 h, much longer than that of sodium selenate. The DCRF improved the yield and nutritive value of cherry radish ( Raphanus sativus L. var.radculus pers ) with the elevated contents of selenium, an essential trace element. Moreover, the DCRF showed inhibitory effect on Fusarium oxysporum Schltdl. and could resist soil-borne fungal diseases continuously. Overall, this multifunctional fertilizer has great potential for expanding the use of BCRFs for sustainable development of agriculture.
研究领域:
农业科学
·
植物营养学
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材料科学
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产品关联
DOI
PubMed
高影响因子
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2024
·
IF 7.7
Shiyan Sun,Yunxuan Weng,Yu Han,Caili Zhang
Polylactic acid (PLA), a biodegradable polymer with low flexibility, is commonly plasticized with small molecules like tributyl citrate (TBC) for film production. However, these plasticizers, which lack chemical bonds or strong intermolecular interactions with the matrix, tend to migrate to the film surface over time. Their inclusion often compromises material strength for flexibility, increasing elongation at break but reducing tensile strength. In this research, by combining citric acid with n-butanol (B) and poly(ethylene glycol) diglycidyl ether (E), we synthesized three plasticizers, namely TE 3 , TE 2 B 1 , and TE 1 B 2 , to enhance the flexibility of PLA. TE 2 B 1 and TE 1 B 2 are equipped with butyl ester groups that offer effective plasticizing effects. Additionally, the incorporation of long-chain alkyl featuring epoxy groups can boost the interaction with PLA. The results showed that the epoxy groups of the long-chain alkyl plasticizers can improve the elongation at break without compromising tensile strength significantly. The migration of plasticizer from PLA matrix can be reduced by strong interactions like chemical bonds, entanglements, and hydrogen bonding with PLA. TE 1 B 2 demonstrated the best plasticizing effect. Adding 15 portions of TE1B2 and TBC separately increased PLA's elongation at break to 304 % and 242 %, with tensile strengths of 36.1 MPa and 22.3 MPa, respectively.
研究领域:
材料科学
·
高分子化学
✓ 已验证
DOI
PubMed
高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2024
·Vol. 142
·期 4
·e56404
·
IF 2.7
Song Li,Lingbo Dong,Jinyi Jia,Licong Jiang,Zhenxiang Xin,Wei Liu,Lin Li
A large amount of smoke will be produced during the combustion of ethylene propylene diene monomer(EPDM), which seriously endangers the environment and personal safety. In this study, K-SEP was obtained by modifying sepiolite with KH550, and two bio-based flame retardant and smoke suppression systems AEGS and PEGS were prepared by combining ammonium polyphosphate intumescent flame retardant system (AEG) and piperazine pyrophosphate intumescent flame retardant system (PEG), respectively. The flame retardant and smoke suppression properties of AEGS and PEGS on EPDM matrix composites were investigated. The experimental results show that the LOI values of EPDM/AEGS3 and EPDM/PEGS3 composites with 3 phr K-SEP are 8.1% and 5.5% higher than those of the blank samples without sepiolite. TSP decreased by 26.3% and 14.3% respectively, which proved that sepiolite has important research value in the field of flame retardant and smoke suppression of polymer materials.
研究领域:
材料科学
·
环境科学
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产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）