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Study on Toughening Phenolic Foams in Phosphorus-Containing tung oil-Based Derivatives

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Journal of Renewable Materials 2019年第10期7卷 1011-1021页

作者： Fei Song Puyou Jia Yanan Xiao Caiying Bo Lihong Hu Yonghong Zhou Institute of Chemical Industry of Forest Products Chinese Academy of Forestry(CAF)National Engineering Laboratory for Biomass Chemical UtilizationCo-Innovation Center of Efficient Processing and Utilization of Forest ResourcesKey Laboratory of Chemical Engineering of Forest ProductsNational Forestry and Grassland AdministrationKey Laboratory of Biomass Energy and MaterialsNanjing210042China School of Petroleum and Chemical Engineering Dalian University of TechnologyDalian124221China

Phenolic foams(PFs)as thermal insulation material with outstanding flame retardancy are required to match society’s ever-expanding safety expectations;however,a trade-off exists between flame retardancy and ***,for the first time,we synthesized a novel reactive phosphorus-containing tung-oil-based derivative and used it to toughen PF,resulting in PFs with a combination of excellent mechanical properties and flame *** with pure PF,the modified PFs exhibit enhanced mechanical properties,with specific compressive and flexural strengths as high as 5.67 MPa and 12.46 MPa,which represent increases of 90.67%and 178.7%over those of pure PF,***,the limiting oxygen index(LOI)values of the modified PFs are improved as much as 40.83%.Scanning electron microscopy micrographs show that the microstructure of the modified PFs is better than that of pure PF,with a more uniform cell morphology,a narrower pore size distribution range,and a smaller average pore size,all of which are beneficial to the foam’s mechanical *** study provides a scientific paradigm for the development of advanced PFs based on renewable biological resources.

关键词： tung oil phenolic foams toughen mechanical properties LOI

Insight into Hydrolytic Stability and Tribological Properties of B-N Coordination tung oil-Based Lubricant Additive in Water

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Journal of Renewable Materials 2023年第3期11卷 1367-1381页

作者： Na Yao Haiyang Ding Mei Li Pengcheng Wang Shouhai Li Lina Xu Xiaohua Yang Institute of Ecological Conservation and Restoration CAFBeijing100091China Institute of Chemical Industry of Forest Products CAF、National Engineering Laboratory for Biomass Chemical Utilization、Key Laboratory of Chemical Engineering of Forest ProductsNational Forestry and Grassland Administration、Key Laboratory of Biomass Energy and MaterialJiangsu Province、Jiangsu Co-Innovation Center of Efficient Processing and Utilization of Forest ResourcesNanjing210042China School of Chemical Engineering Nanjing University of Science&TechnologyNanjing210094China

A tung oil-based boron-nitrogen coordination polymer(TWE-BN)was specially designed and synthesized as a highly efficient water-based lubricant additive,which has been beneficial to both energy conservation and conducive to environmental *** hydrolysis stability and tribological properties in water were *** better research the lubricating properties,and thus to understand the interaction between the surface and the lubricating ***,both experimental and theoretical computations based on density functional theory(DFT)were *** addition of TWE-BN reduces the water friction coefficient and wear scar diameter,and the maximum non-seizure load increased from 93 to 726 ***,the anti-corrosion ability on copper was classified as 1b *** stainless-steel surface was analyzed using scanning electron microscopy(SEM)and X-ray photoelectron spectroscopy(XPS).In hydrolytic stability testing,TWE-BN was better than nitrogen-free tung oil-based lubricant additive(TWE-B)and remained non-hydrolyzed for at least 15 days,implying the feasibility of tung oil-based boron-nitrogen coordination as highly effective and hydrolytic stability lubricant additives.

关键词： Tribological properties tung oil borate hydrolytic stability boron-nitrogen coordination

Preparation and Properties of tung oil-Based Polyurethane

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Transactions of Tianjin University 2014年第4期20卷 273-281页

作者：袁才登赵晓明邵丽英唐克华 School of Chemical Engineering and Technology Tianjin University Zhangjiajie tungfair Technologies Co. Ltd.

tung oil-based polyols were synthesized by the esterification and transesterification between tung oilbased anhydride and butanediol. The hydroxyl values of the polyols prepared were tested and discussed. Polyurethane was prepared by using tung oil-based polyols and/or poly(propylene glycol) as polyols and by using isophorone diisocyanate as isocyanate. The effect of the ratio of tung oil-based polyols to poly(propylene glycol) on the properties of polyurethane prepared was investigated by the water resistance, alcohol resistance and hardness tests. The results show that tung oil-based polyols are effective to improve the hardness, water resistance and alcohol resistance of polyurethane.

关键词： tung oil tung oil-maleic anhydride polyurethane water resistance hardness coating

Preparation and Characterization of tung oil Toughened Modified Phenolic Foams with Enhanced Mechanical Properties and Smoke Suppression

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Journal of Renewable Materials 2020年第5期8卷 535-547页

作者： Fei Song Puyou Jia Caiying Bo Xiaoli Ren Lihong Hu Yonghong Zhou Institute of Chemical Industry of Forest Products Chinese Academy of ForestryNational Engineering Laboratory for Biomass Chemical UtilizationCo-Innovation Center of Efficient Processing and Utilization of Forest ResourcesKey Laboratory of Chemical Engineering of Forest ProductsNational Forestry and Grassland AdministrationKey Laboratory of Biomass Energy and MaterialsNanjing210042China Nanjing Forestry University Nanjing210037China

In this study,we prepared a series of tung oil phenolic foams(TPF)by a one-pot *** FT-IR and 1H NMR spectra confirm the successful Friedel-Crafts grafting of phenol to the long-chain alkyl group in tung *** TPFs exhibit enhanced mechanical properties,including compressive and flexural strengths of up to 0.278±0.036 MPa and 0.450±0.017 MPa,respectively,which represent increases of 68.75%and 86.72%over those of pure phenolic foam(PF).SEM spectra reveal the TPF microstructure to have uniform hexagonal cell morphology,narrower cell size distribution,and smaller mean cell size,suggesting enhanced mechanical *** TPF total smoke release decreased by 74.23%,indicating that the long alkyl chain significantly improves smoke suppression of the combusting ***,due to the flammability of the alkyl chains,the TPF limiting oxygen index decreases with increasing tung oil ***,TPF exhibits reduced thermal stability and high-temperature charring rate,elevated peak and mean heat release rates,and higher total heat release compared with pure ***,future research will focus on the use of tung oil modified flame retardant to provide more robust phenolic foams.

关键词： tung oil Friedel-Craft reaction phenolic foams mechanical properties smoke suppression

Multifunctional Lubricant Additive Improves Lubrication and Antioxidation Properties of tung oil

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Journal of Renewable Materials 2023年第7期11卷 3115-3128页

作者： Na Yao Haiyang Ding Mei Li Shouhai Li Lina Xu Xiaohua Yang Institute of Chemical Industry of Forest Products CAFNational Engineering Laboratory for Biomass Chemical UtilizationKey Laboratory of Chemical Engineering of Forest ProductsNational Forestry and Grassland AdministrationKey Laboratory of Biomass Energy and Material of Jiangsu ProvinceJiangsu Co-Innovation Center of Efficient Processing and Utilization of Forest ResourcesNanjing210042China Institute of Ecological Conservation and Restoration CAFBeijing100091China

It is of considerable significance to develop efficient and environmentally friendly machinery lubricant additives because of the increasing depletion of petrochemical resources and severe environmental ***,we proposed a facile strategy to synthesize a multifunctional vegetable oil-based lubricant via the lignin derivative vanillin coupled to amine and diethyl phosphite to produce a lubricating additive with both extreme pressure and antioxidant *** with pure tung oil,the lubricating and antioxidant performance of tung oil is significantly improved after adding *** the 1.0 wt%additive to the tung oil reduced the friction wear coefficient and the volume,and the oxidation induction time was much longer than pure tung oil.

关键词： tung oil lubricant additives antioxidation multifunction

Study on Immobilized Lipase Catalyzed Transesterification Reaction of tung oil

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Agricultural Sciences in China 2006年第11期5卷 859-864页

作者： XU Gui-zhuan ZHANG Bai-liang LIU Sheng-yong YUE Jian-zhi Key Laboratory of Renewable Energy of Ministry of Agriculture/Mechanical and Electrical Engineering College Henan Agricultural University Zhengzhou 450002 P.R.China

The transesterification reaction conditions of tung oil with methanol have been studied in this article, with immobilized lipase NOVO435 as catalyst. The response surface methodology was used to optimize the transesterification reaction of tung oil in a nonsolvent system. The optimal conditions were rotation rate 200 r/min, molar ratio of methanol to oil 2.2： l, reaction temperature 43℃, and the catalyst amount 14% （based on the weight of oil）. After reacting for 18 h, 67.5% of the oil was converted to its corresponding methyl esters （the theoretical ester conversion was 73.3%）. The lipase was washed by organic solvents after each reaction and was reused again. The esters conversion of tung oil was decreased by 6% after the lipase was reused for 120 h. The theoretical amount of methanol was added in two steps, 85% ester conversion was obtained after 36 h of reaction （theoretical ester conversion was 100%）. The molar ratio of methanol to oil, the catalyst amount, the reaction temperature, and reaction time were all highly significant factors, and there was a relative significant interaction between every two factors.

关键词： nonsolvent transesterification biodiesel lipase tung oil

Technology and kinetics of free fatty acids esterification in tung oil

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Journal of Chongqing University 2009年第2期8卷 133-138页

作者：甘孟瑜潘登 College of Chemistry and Chemical Engineering Chongqing University

We studied the esterification of free fatty acids （FFA） in tung oil with methanol by using activated carbon treated with sulfuric acid as a catalyst, and investigated the effect of different temperatures, methanol/oil mole ratio and catalyst amount on the conversion of FFA. Results show that the optimal reaction condition is when the reaction time is 2 h, the mass fraction of the catalyst to total material is 5%, the molar ratio of menthol to FFA is 15 ： 1, and the reaction temperature is 368.15 K. We also investigated the kinetics of estefification at various temperatures. Results indicate that the rate-control step could be attributed to the surface reaction, and within the range of the experimental conditions, the as-calculated kinetics formula can depict the esterification processes well.

关键词： b-iodiesel kinetics esterification tung oil supported catalyst

Hydrophobicity and carbonation treatment of earthen monuments in humid weather condition

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Science China(Technological Sciences) 2012年第8期55卷 2313-2320页

作者： LI Min ZHANG HuYuan Key Laboratory of Mechanics on Disaster and Environment in Western China Ministry of EducationLanzhou UniversityLanzhou 730000China School of Civil Engineering and Mechanics Lanzhou UniversityLanzhou 730000China

Water stability of soil is crucial to the durability of earthen monuments,especially those located in the humid weather *** paper discusses the selection reason of materials(tung oil and quicklime) for earthen monument treatment,and then validates the applicability of these materials with tests of soil-water characteristic curve(SWCC),aggregate stability test(AST) and scanning electron microscope(SEM).The soil tested was sampled from Da Bao'en temple in Nanjing,Jiangsu province,*** test results indicate that the carbonation reaction of quicklime offers a favorable environment for the formation of tung oil ***,the regulatory function of tung oil restricts the crystallinity of calcium carbonate(CaCO3) and forms fine *** treated with both of tung oil and quicklime has good water repellency and aggregate stability without obvious changing in aesthetic *** and carbonation treatment can be applied prospectively in the conservation of earthen monument located in humid weather condition.

关键词： water repellency carbonation earthen monuments SWCC AST SEM tung oil quicklime

The Preparation and Characterization of Conjugated Linolenic Acid

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合成化学 2004年第Z1期12卷 150-150页

作者： Cao Ying Yang Lin Chen Zhen-Yu College of Chemistry and Environmental Science Henan Normal UniversityHenanChina Food and Nutritional Sciences Programme Department of BiochemistryThe Chinese University of Hong KongShatinNew TerritoriesHong KongChina

Conjugated Linolenic Acid (CLN) has recently been shown to have a more strong cytotoxic effect on various human tumor cell lines than CLA. In CLN, all the three double bonds are conjugated, whereas they are methylene-interrupted in LN. Some seed oil, such as tung oil and pomegranate seed oil, principally consist of CLN, accounting for 76.5% and 75.5%, *** can be characterized using the combination of gas chromatography (GC), highperformance liquid chromatography (HPLC) and UV /VIS spectrophotomea-ic analysis. GC can separate the CLN from other fatty acids and HPLC can separate the individual CLN *** conjugated triene formation has a maximum absorbency at 268 nm and the conjugated diene formation has an absorbency at 235 nm in UV *** was prepared from linseed oil by isomerization reaction in our present study. By treating at was isomerized and the product was purified by recrystallizing in the methanol. The GC and UV /VIS spectrophotometric analysis were used to characterize the obtained products. It was found that the a-LN in the linseed oil was converted to the corresponding conjugated diene acids and CLN. The GC analysis also showed that there formed about 20% CLN when reacting for 10h with 40% KOH/ethylene glycol.

关键词： Conjugated Linolenic Acid tung oil pomegranate isomerization