JOURNAL OF INDUSTRIAL AND ENGINEERING CHEMISTRY
·
2015
·
IF 3.512
Pu-You Jia,Cai-Ying Bo,Li-Qiang Zhang,Li-Hong Hu,Meng Zhang,Yong-Hong Zhou
Epoxidized castor oil (ECO) and castor oil phosphate ester (COPE) were synthesized. Structure of two functionalized castor oil was characterized with FTIR and 1 H NMR. Property of poly (vinyl chloride) PVC blends plasticized with ECO and (COPE) as secondary plasticizer was studied. The results indicated that thermal stability of plasticized PVC blends was improved, LOI value of PVC blends cooperated with COPE could reach 27.8%, flame retardant performance of COPE was put into effect by promoting polymer carbonization and forming a consolidated and thick flame retardant coating, which is effective to prohibit the heat flux and air incursion.
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
INDUSTRIAL CROPS AND PRODUCTS
·
2021
·
IF 5.645
Guo Liu,Mingjuan Liao,Baoyan Guo,Qixin Kan,Shuangde Zhou,Konglong Feng,Wanhuang Lin,Yahui Huang,Jianyin Miao,Yong Cao
Castor ( Ricinus communis L.) meal, a by-product of castor oil production, is a high-quality protein source. Unfortunately, the toxic substance limits its application. Herein, a novel continuous phase transition extraction (CPTE) technology at pilot scale was explored for castor meal detoxification. The detoxification conditions were optimized using response surface methodology (RSM) as: treatment time of 3 h, extraction pressure of 0.16 MPa and temperature of 84.8°C. And the removal rate of allergens, hemagglutinin, and ricin reached 79.2 %, 99.8 % and 99.0 %, respectively. The protein content of castor meal increased from 38.4% to 39.0%. The nontoxicity nature of the treated caster meal was verified via an acute toxicity tests where the mean lethal dose was >5000 mg/kg body weight. Overall, CPTE offers a novel and efficient tool for castor meal detoxification, with the superiority of non-nutrient loss, it improved the application value of castor meal and reduced the risk of environmental pollution.
研究领域:
食品科学
·
植物学
✓ 已验证
DOI
高影响因子
CHEMICAL PAPERS
·
2021
·Vol. 75
·期 5
·1949-1958
·
IF 2.097
Zou Heng,Cao Qin-bo,Liu Dian-wen,Chen Xiu-min,Jiao Yong
Abstract Improving the collecting ability of a collector is a crucial issue in phosphate flotation. In this work, ricinoleic acid (RA) was used as a collector for fluorapatite (FA, Ca 5 (PO 4 ) 3 F) flotation. There is an OH group in the middle of the RA molecule, and thus, hydrogen bonds (H-bonds) can be formed between RA species. The role of the H-bond between RA molecules in FA flotation was revealed by experimental and theoretical calculation methods. The flotation results suggested that RA was more efficient than oleic acid for FA flotation at pH 9. The RA − anion was chemisorbed onto the negative FA surface, forming calcium ricinoleate (Ca(RA) 2 ) precipitates. The crystallization of Ca(RA) 2 on the FA surface was aided by the H-bonds between RA species. On the other hand, the results of quantum chemistry calculations showed that the H-bond in Ca(RA) 2 resulted in the close packing of RA − anions. Such a packing structure may occur on the FA surface, which favors the formation of Ca(RA) 2 on the surface and FA flotation. Moreover, Ca(RA) 2 was more stable than calcium dioleate in solution, also contributing to the better flotation efficiency of RA. These theoretical calculation results clarified the beneficial effect of the H-bond between RA species on FA flotation at the atomic level. Graphic abstract
研究领域:
矿物加工工程
·
物理化学
✓ 已验证
DOI
高影响因子
INDUSTRIAL CROPS AND PRODUCTS
·
2018
·
IF 3.849
Haiyan Liang,Shanwen Wang,Heng He,Mengqi Wang,Lingxiao Liu,Jingyi Lu,Yi Zhang,Chaoqun Zhang
In this study, dimethylol propionic acid (DMPA) and dimethylol butanoic acid (DMBA) were employed to synthesize the castor oil-based waterborne polyurethane dispersions (PUDs). The effects of these two emulsifier and their contents on the properties of the PUDs as well as their films were investigated systematically. The results show that as the emulsifiers contents increase, the particle size and zeta potential of the PUDs decrease while the tensile strength of the resulting PU films increase but thermal stability, water and chemical resistance decrease. The PUDs from DMBA exhibit smaller particle size than those from DMPA and the films from the former show higher tensile strength, higher elongation at break but lower thermal stability, lower water resistance. This work provides a new way to synthesize environmental friendly bio-based waterborne polyurethanes whose properties can be tuned according to their application, such as coating, ink, leather, styling products and so on.
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
Coatings
·
2017
·Vol. 7
·期 10
·159
·
IF 2.175
Shaolong Li,Changlian Xu,Wenfeng Yang,Qingru Tang
We report an efficient and green approach to synthesize a linear castor oil-based polyurethane (CPU) without using any solvent or catalyst. Diol monomers were first synthesized by the aminolysis reaction between castor oil and diamines; this was accomplished within 6 h at 130 °C. Polymerization of the diols and isocyanate was further confirmed by Fourier transform infrared (FTIR),1H-nuclear magnetic resonance (1H-NMR), and gel permeation chromatography analyses. The resultant CPUs showed a good thermal stability with an initial degradation temperature higher than 300 °C, and their mechanical and wood bonding property can be modulated by the structures of diamine. In addition, the CPUs possessed a satisfying water resistance property with the water absorption amount lower than 2%. The green conversion of castor oil to thermoplastic polyurethane affords new opportunities in bio-based industries.Keywords:castor oil;linear polyurethane;catalyst-free;solvent-free
研究领域:
材料科学
·
绿色化学
✓ 已验证
DOI
高影响因子
CARBOHYDRATE POLYMERS
·
2013
·
IF 3.479
Zhu Xiong,Lisheng Zhang,Songqi Ma,Yong Yang,Chuanzhi Zhang,Zhaobin Tang,Jin Zhu
Blends of entirely bio-sourced polymers, namely polylactide (PLA) and starch, have been melt-compounded by lab-scale co-extruder with castor oil (CO) as a plasticizer. The enrichment of castor oil on starch had great effect on the properties of the blends. If the castor oil was mainly dispersed in PLA matrix, the properties of the blends were poor, but when the hexamethylenediisocyanate (HDI) was grafted on starch granules the ready reactions between the hydroxyl on CO and the isocyante on the HDI-grafted starch (HGSTs) brought CO molecules enriched on starch particles. DSC analysis shows that the CO layer on starch has a positive effect on the crystallization of PLA in the ternary blend. The accumulation of CO on starch greatly improves the toughness and impact strength of PLA/starch blends. The grafting content of HDI on the starch granules primarily determined the compatibility and properties of the resulted blends.
研究领域:
材料科学
·
生物化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF POLYMER RESEARCH
·
2025
·Vol. 32
·期 4
·1-11
·
IF 2.8
Liang Miaoqing,Guan Fanglan,Zhang Mei,Nie Jinmei,Bao Lihong
Self-healing materials have gained significant attention due to their ability to autonomously repair damage, extending material lifespan. In this study, bio-based self-healing polyurethanes were synthesized using modified castor oil (MCO) as the soft segment and 5-(2-hydroxyethyl)- 6-methyl- 2-aminouracil (UPY) and 2,2'-diaminodiphenyldisulfide (DTDA) as dynamic components. The synergistic effect of quadruple hydrogen bonding and disulfide bonds was investigated by varying the n(UPY)/n(DTDA) ratio. Structural and mechanical properties were characterized using IR, DSC, TGA, XRD, and tensile testing. The results revealed that the castor oil-based polyurethanes exhibited transparency and amorphous structures, making them promising bio-based self-healing materials. When the DTDA content was 9.54% and the UPY content was 1.62%, the material achieved a self-healing efficiency of 96.38% under 80 °C for 12 h. Additionally, at a DTDA content of 6.65% and a UPY content of 2.43%, the tensile strength reached 17.76 MPa. Mechanistic analysis revealed that disulfide bonds played a dominant role in self-healing, while hydrogen bonds provided additional reinforcement. This work presents a novel bio-based polyurethane system with tunable mechanical and self-healing properties, contributing to the development of sustainable smart materials.
研究领域:
材料科学
·
生物化学
✓ 已验证
产品关联
DOI
高影响因子
POLYMER INTERNATIONAL
·
2012
·Vol. 62
·期 10
·1457-1464
·
IF 1.902
Youmei Bao,Jing He,Yuesheng Li
Hyperbranched polyesters with thioether linkages were facilely prepared from methyl 10-undecenoate, a castor oil-derived renewable chemical. The monomer was obtained in excellent yield through thiol–ene click chemistry in the presence of catalytic amounts of photoinitiator under UV irradiation. Subsequent bulk polycondensation via a transesterification process catalyzed by Ti(OBu) 4 , Sb 2 O 3 or Zn(OAc) 2 gave hyperbranched polyesters with high molecular weights and unusual crystalline properties. The degree of branching in the range 0.45 − 0.54 calculated from quantitative 13 C NMR spectroscopy and low inherent viscosities of 0.16 − 0.25 dL g −1 strongly confirmed the hyperbranched structures of the resultant polymers. © 2012 Society of Chemical Industry
研究领域:
材料化学
·
可再生资源化学
✓ 已验证
产品关联
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2015
·
IF 2.605
Mingxian Yu,Jingxian Zhang,Xiaoguang Li,Hanqin Liang,He Zhong,Yinsheng Li,Yusen Duan,Dong Liang Jiang,Xuejian Liu,Zhengren Huang
The preparation of concentrated suspensions with high stability is crucial for tape casting . Dispersant plays an important role in the developing of high solid loading slurries with low viscosity. In this study, castor oil, phosphate ester and castor oil phosphate were selected as dispersants for alumina suspensions. The interaction between dispersant and alumina powders was characterized in terms of adsorption and viscosity measurements. Results showed that castor oil phosphate is more effective dispersant for alumina slurries. The influence of dispersant content, binder content, plasticizer/binder ratio and solid loading on the green sheet and mechanical properties of as-sintered alumina samples were also investigated. It was shown that the optimized formulation for dispersant, binder, plasticizer/binder ratio and solid loading was 2.22 wt%, 5.90 wt%, 1.0 and 31 vol%, respectively. Alumina ceramics showed improved mechanical properties, with the indentation hardness and fracture toughness as 15.91±0.15 GPa and 4.29±0.06 MPa m 1/2 , respectively.
研究领域:
材料科学
·
陶瓷工程
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
COMPOSITES PART A-APPLIED SCIENCE AND MANUFACTURING
·
2022
·
IF 9.463
Shenghe Zhang,Fukai Chu,Yifan Zhou,Zhoumei Xu,Xin Jiang,Xiaoyu Luo,Guojie Yuan,Yuan Hu,Weizhao Hu
Bio-based flexible polyurethane (PU) with fire-retardancy can not only relieve the pressure of limited fossil resources, but also effectively solve the serious problem derived from fire accident. Herein, diphenylphosphinyl chloride and 3-aminopropyltriethoxysilane (KH550) were introduced into the castor oil molecular chain, and modified castor oil (CPK) was successfully synthesized. By using CPK to replace part of the original polyol, we had prepared flexible PU: The PU/CPK 15.0 mol% sample successfully passed the vertical combustion test and achieved the eminent flame-retardant and smoke-suppressing effect. In the rapid adsorption test of organic solvents, both toluene and n-hexane can be quickly and completely absorbed by the modified foam sample, while the unmodified foam was not good as that. Besides, the modified foam also met certain mechanical properties. This work broadens the thinking for the preparation of high-performance flexible PU materials with green intrinsic fire-retardancy.
研究领域:
材料科学
·
化学工程
✓ 已验证
DOI
高影响因子
Polymers
·
2017
·Vol. 9
·期 12
·640
·
IF 3.364
Jie Chen,Ke Li,Yigang Wang,Jinrui Huang,Xiaoan Nie,Jianchun Jiang
A novel renewable plasticizer based on castor oil, epoxidized glycidyl ester of ricinoleic acetic ester (EGERAE), was synthesized and applied into Poly(vinyl chloride) (PVC) for the first time. Its molecular structure was characterized by FT-IR and1H NMR. The effects of replacement of petroleum-based commercial plasticizer dioctyl phthalate (DOP) with EGERAE in poly(vinyl chloride) (PVC) films were researched. Thermal stability, dynamic mechanical property and mechanical properties of PVC films were investigated with thermogravimetric analysis (TGA), dynamic mechanical analysis (DMA) and tensile tests. The results indicated that this castor oil-based plasticizer was able to improve the thermal stability of PVC blends when partially of completely substituting for DOP. Furthermore, EGERAE endowed PVC resin with enhanced flexibility. In addition, the exudation, volatility and extraction resistance characteristics of plasticizers were researched. The degradation mechanism and possible interaction between EGERAE and PVC molecules in the plasticized system were also investigated.Keywords:poly(vinyl chloride);renewable plasticizer;thermal stability;castor oil
研究领域:
材料科学
·
化学工程
✓ 已验证
DOI
PubMed
高影响因子
CARBOHYDRATE POLYMERS
·
2020
·
IF 7.182
Hongyu Tian,Zeli Li,Panfang Lu,Yong Wang,Cong Jia,Huaili Wang,Zhiguang Liu,Min Zhang
Due to the poor controlled release ability, bio-based materials are difficult for large scale application on controlled release fertilizers (CRFs). Starch-based polyol (SP) and castor oil (CO) were mutually modified, and a cross-linked polymer film was formed on the surface of urea by in-situ reaction, which improved the slow release ability of the bio-based material. The results showed that increasing the CO ratio reduced porosity of coating and prolonged the nitrogen (N) release period, while the SP changed the high-temperature wrinkle characteristics and regulated the early N release rate. The mutual modification achieved an ultra-long release period of bio-based CRUs for 7 months. The degradation rate during nine months of bio-based coatings (5.05 %) was significantly higher than that of petroleum-based (3.74 %), and the coating was non-toxic to rice seeds. Mutual modification provided a safe and effective solution for the preparation of bio-based CRFs with long-term controlled release capability.
研究领域:
材料科学
·
农业科学
✓ 已验证
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）