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
CHEMICAL ENGINEERING SCIENCE
·
2024
·
IF 4.1
Haoyu Zhang,Huimin Ye,Hanfei Liu,Wenyan Zhang,Su Wang,Shuangfei Zhao,Weidong Zhang,Yuguang Li,Dong Ji,Shuangtao Li,Songbo Ni,Yiping Huang,Zheng Fang,Wei He,Yingcheng Li,Kai Guo
In this study, microfluidic system was adopted to investigate the effects of hydrodynamic factors on chemical flooding. The combination of visualization experiments and computational fluid dynamics (CFD) simulations was used to evaluate the effects of flow rate, interfacial tension (IFT), viscosity, density, contact angle and porosity on EOR (enhanced oil recovery). The chemical flooding regulation model was built through dimensional analysis of hydrodynamic factors, affording oil displacement empirical formula for oil displacement by fitting EOR data. The empirical formula displayed high applicability within a certain range of capillary number (Ca), oil–water density ratio and porosity. In addition, the empirical formula was expected to guide the development of a cardanol-based surfactant, whose preparation process was optimized in the microreactor. These findings would provide useful references for understanding the EOR mechanism of chemical flooding at micro-scale.
研究领域:
石油工程
·
化学工程
·
数值模拟
✓ 已验证
产品关联
DOI
高影响因子
COMPOSITES PART B-ENGINEERING
·
2022
·
IF 11.322
Xin Jiang,Fukai Chu,Xiaoyu Luo,Yuan Hu,Weizhao Hu
Aiming to address the problems of flammability and brittleness of BMI and reduce the use of petroleum-based materials, three kinds of cardanol-based co-curing agents (CDPO, CDPC, CDCP) were synthesized and applied to prepare advanced BMI . Compared to the neat BMI, the modified BMI exhibited better thermal stability with higher decomposition temperatures and char yields. The BMI/CDCP-10 containing 4.5 wt% CDCP possessed the best flame retardancy with 50.4% reduction in PHRR , 27.5% reduction in THR and 21.2% reduction in TSP compared to those of neat BMI. Moreover, with the 4.5 wt% incorporation of CDPO, CDPC and CDCP, the impact strength of BMI was enhanced by 95%, 133.8% and 127.5% respectively, due to the flexible fatty chains and the decreased crosslinking density . The reason for different modification effects among modified BMI systems is studied from the structure of modifiers, finding that the phosphorylated cardanol with higher content of O and higher valence of P can be utilized to improve the mechanical property and fire safety of BMI. This work provides a new way to reduce the dependence on the petroleum-based materials and expand the application areas of BMI.
研究领域:
材料科学
·
化学工程
✓ 已验证
DOI
高影响因子
Journal of Coatings Technology and Research
·
2018
·Vol. 16
·期 1
·179-188
·
IF 1.619
Yuan Yan,Chen Miao,Zhou Qiaohua,Liu Ren
Multiarm cardanol-based oligomers with a cyclotriphosphazene core were prepared through a nucleophilic substitution reaction; the structures of oligomers were fully characterized and confirmed through Fourier transfer infrared spectrometry, 1 H nuclear magnetic resonance (NMR), 31 P NMR, and gel permeation chromatography. The designed multiarm bio-based acrylates (AECC) were successfully prepared by epoxidizing the unsaturated aliphatic chain of cardanol segments with m -chloroperoxybenzoic acid and acrylating epoxy groups. The synthesized oligomers contain rigid phosphazene/benzene rings as “hard cores” and long aliphatic chains as “flexible shells.” Compared with commercial hyperbranched polyurethane acrylate (CN2302) and acrylated epoxidized soybean oil, cured AECC coatings and films exhibited not only greater hardness, excellent adhesion, higher glass transition temperatures, and excellent mechanical properties but also good thermal stability and biodegradability. We successfully obtained a high-performance UV-curing resin that has a high biorenewable material content and can meet basic daily requirements.
研究领域:
材料科学
·
化学工程
·
可再生资源利用
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）