Papers by Author: Lin Lin Guo

Abstract: In this study, a FE simulation model of the continuous extrusion process with double feedstocks is established. It is aimed to investigate the weld quality of AA6063 aluminium alloy profiles. The results show that with the height of preformed die increasing, the pressure-to-effective stress ratio (K) increases greatly and the welds can be improved. The maximum value of K reaches to 5.5. By observation the microstructure of the welding zone, the extrusion welding line does not extend to the product surface. No defects appeared on the surface of the extruded product. It is proved that the AA6063 product with good welding quality can be obtained by continuous extrusion with double feedstocks. These also provide the theoretical basis for expanding the application of the continuous extrusion process with double feedstocks.

Abstract: Liriodendron chinense (Hemsl.) Sarg (Chinese tulip tree) has a long history of utilization and plantation, but the chemical components of benzene/ethanol extractives of Liriodendron chinense (Hemsl.) Sarg leaves were unrevealed. The analytical result by method of GC/MS showed that the chemical components of benzene/ethanol extractives of freeze-dried Liriodendron chinense were identified as 55 constituent, and the main components are as: 2-Propenenitrile, 2-chloro- (13.75%), 1-Mercapto-2-heptadecanon (13.10 %), 1-Mercapto-2-heptadecanon (12.77%), Ethanol, 2-butoxy- (12.03%), 1-Docosanol (10.74%), Guanidine, (4-aminobutyl)- (5.05%), 5,10-Pentadecadiyn-1-ol, acetate (4.82%), 1,2,4-Butanetriol (3.13%), Thiophene, 2-ethyltetrahydro- (2.09%), 1-Eicosanol (2.00%), 1-Butanol, 3-methyl-, formate (1.60%), Butanoic acid (1.60%), .alpha.-D-Xylofuranoside, methyl 3,5-di-O-methyl- (1.30%), Phenol, 2,6-dimethoxy-4-(2-propenyl)- (1.29%),5.alpha.-Pregnane-12,20-dione (1.12%), Cyclopentanol (0.82%), etc. As the first report here, our result by GC/MS showed that the benzene-methanol extractive of freeze-dried leaves from Liriodendron chinense (Hemsl.) Sarg can be developed into top value-added materials of medicines and spicery.

Abstract: The petroleum ether extractives of oil-tea cake was analyzed and identified by Py-GC/MS. The analytical result showed that 65 peaks were obtained from the 550°C pyrolyzates of petroleum ether extractives of oil-tea cake and 61 compounds representing 97.63 % of the total areas were identified. The analytical result showed that the main components of 550°C pyrolyzates of petroleum ether extractives of oil-tea cake by pyrolysis- GC/MS were as: 1-Dotriacontanol (11.57% from five peaks), 3-Cyclohexene-1-Methanol, .Alpha.,.Alpha, 4-Trimethyl-,(S)- (10.52%), Cis-2-Ethylcyclopentanecarboxaldehyde (9.89%), Trans-Sobrerol (8.27%), 1,3-Benzodioxole, 5-(1-Propenyl)- (7.65%), Cholestan-3-Ol, 2-Methylene-, (3.Beta., 5alpha)- (6.81%),1,2-Trans-1,5- Trans-2,5-Dihydroxy-4-Methyl-1-(1-Hydroxy-1-Isopropylcyc (5.02%), 4-Nonanone, 2,6,8-Trimethyl - (4.69%), Bicyclo 2.2.1 Heptan-2-One, 1,7,7-Trimethyl-,(1s)- (4.55%), Squalene (3.86%), (R)-(-)-(Z)-14-Methyl-8-Hexadecen-1-Ol (2.97%), Undecane 2-Cyclohexyl-, 2-Cyclohexyl- (2.53%), 4,8,13-Cyclotetradecatriene-1,3-Diol, 1,5,9-Trimethyl-12- (1-Methylethlyl)- (1.94%), 3,4-(Methylenedioxy)Toluene (1.88%), Hexadecanoic Acid, 2-Hydroxy-1,3-Propanediyl Ester (1.37%), etc. The result of function analyses suggested that the petroleum ether extractives of oil-tea cake contain abundant components of materials which can be developed into rare natural medicinal, high-grade spice, cosmetic, food, etc.

Abstract: Platanus × acerifolia (Ait.) Willd has high tolerance to environment stress, and a long history of utilization and plantation in China. It is important to recover and utilize the polluting waste leaves from Platanus × acerifolia (Ait.) Willd in order to separate top value-added bioactive components, hence the chemical components of benzene/ethanol extractive of waste leaves from Platanus × acerifolia (Ait.) Willd by means of GC/MS. Relative content of each component was determined by area normalization, and 19 compounds representing 92.35 % of the extractives were identified. The most abundant constituents were as: The analytical result showed that the main components of benzene-methanol extractive of freeze-dried waste leaves from Platanus × acerifolia (Ait.) Willd by GC/MS analysis were 1,3-Dioxane (24.95%), Ethylbenzene (19.03%), p-Xylene (16.02%), Benzene, 1,2-dimethyl- (6.64%), Indane (4.00%), Heptanal (3.89%), 1-Methyl-2-(4-nitrophenyl)benzimid (3.39%), (11H)Pyrido[3',2':4,5]imidazo[2,1- (3.25%), 10-Methylnonadecane (3.00%), Benzene, 1-ethyl-3-methyl- (2.91%), Benzene, 1-ethyl-3-methyl- (2.65%), Benzene, 1-ethyl-2-methyl- (2.46%), 2,5-Cyclohexadien-1-one, 2,5-dimethyl- (1.74%), Docosane, 7-butyl- (1.52%), 1-Amino-2-(hydroxymethyl)anthraqui (1.47%), Acetaldehyde - (0.89%), etc. Our result by GC/MS firstly showed that the benzene-methanol extractives of freeze-dried waste leaves from Platanus × acerifolia (Ait.) Willd can be used as top value-added materials of medicines, cosmetics and industrial solvents.

Abstract: The researches are very less about the acetone extractives of rood wood from Cinnamomum camphora, a famous non-wood tree in China. Therefore, 550°C-based Py-GC/MS was used to analyze the high-grade resource recovering approaches of C. camphora root wood. The analytical result showed that the main components of the acetone extractives of C. camphora root wood by 550°C-based pyrolysis- GC/MS are as: Decanoic acid, 1,2,3-propanetriyl ester (16.720%), 4-Nitrophenyl laurate (9.104%), 1,3-Benzodioxole, 5-(2-propenyl)- (6.3744%), Bicyclo[2.2.1]heptan-2-one, 1,7,7-trimethyl-, (1R)- (5.646%), 2-Hydroxy-5-methylbenzohydrazide (3.516%), p-menth-1-en-8-ol (3.279%), Benzene, 1,2-dimethoxy-4-(2-propenyl)- (2.686%), Dodecanoic acid, 1,2,3-propanetriyl ester (2.478%), 2,3-Butanediol, [S-(R*,R*)]- (2.177%), Phenol, 2,6-dimethoxy- (2.147%), 2-Oxabicyclo[2.2.2]octan-6-ol, 1,3,3-trimethyl- (1.642%), Tricyclo [2.2.1.0(2,6)]heptane, 1,7-dimethyl-7-(4-methyl-3-pentenyl)-, (-)- (1.349%), Bicyclo[2.2.1] heptan-2-ol, 1,7,7-trimethyl-, (1S-endo)- (1.292%), Acetic acid, 2-acetoxymethyl-1,2,3- trimethylbutyl ester (1.174%), Phenol, 2,6-dimethoxy-4-(2-propenyl)- (1.125%), etc. The result of functional analysis suggested that C. camphora root wood can be used as top value-added materials of biomedicine, and also as the materials of bioenergy, perfume, cosmetic, food, dye and industrial solvent.

Abstract: The production of noble Cinnamomum camphora oil from C. camphora leaves and twigs brings a mass of extracting wastewater which is pollutive to water environment. In order to better utilize and recover the productive wastewater from the Eucalyptus oil, we used GC/MS to analyze the possible top value-added components of benzene/ethanol extractives of leaves and twigs of C.camphora. The analytical result showed that only 15 compounds were identified from the benzene/ethanol extractive of C. camphora trigs, and 29 compounds from 30 peaks were identified from the benzene/ethanol extractive of C. camphora leaves. The analytical result showed that the main components of the benzene/ethanol extractive of C. camphora twigs by GC/MS are as: Bicyclo[2.2.1]heptan-2-one, 1,7,7-trimethyl-, (1R)- (36.85%), Linalyl propanoate (23.58%), Eucalyptol (10.07%), 1,3-Benzodioxole, 5-(2-propenyl)- (8.88%), 4,4-dimethylcholest-7-ene-3-ol (5.81%), Cyclopentanol (3.37%), 1,2,4-Cyclopentanetrione, 3-(2-pentenyl)- (2.52%), etc. The result by GC/MS analysis showed that the benzene/ethanol extractive of leaves of C. camphora are as: Eucalyptol (58.51%), 3-Cyclohexene-1-methanol, .alpha.,.alpha.4-trimethyl- (13.98% from two peaks), Sabinene (4.45%), 1-Mercapto-2-heptadecanone (2.69%), Phytol (2.29%), Camphene (1.94%), 1-Eicosanol (1.81%), Caryophyllene (1.63%), 1,3-Benzodioxole, 5,5'-(tetrahydro- 1H,3H-furo[3,4-c]furan-1,4-diyl)bis-, [1S-(1.alpha.,3a.alpha.,4.beta.,6a.alpha.)]- (1.50%), 1-Penten- 3-ol (1.01%), beta.-Pinene (0.86%), etc. There are many important constituents of rare natural medicine, cosmetic and spicery in the benzene/ethanol extractive of twigs and leaves of C. camphora.

Abstract: The bamboo resource is very abundant in China, and both species and yield of bamboo are the first in the world. In the countryside of China, farmers often used the extractives of bamboo root to cure some special diseases; however, the biomedical constituents of extractives of bamboo root are still not completely explained. Therefore, 450 °C pyrolysis- GC/MS technology was used to identify the top value-added biomedical constituents of root-based benzene/ethanol extractives from the richest bamboo species “Moso bamboo”. After treatment of benzene/ethanol extraction, the extractives obtained was fully pyrolyzed at 450 °C in He atmosphere, and then the 450 °C pyrolyzate obtained was analyzed by online-linked GC/MS. Relative content of each component was determined by area normalization. 59 chemical constituents representing 97.62% were identified from 64 peaks. The analytical result showed that the 450 °C pyrolyzate of benzene/ethanol extractives from Moso bamboo root is abundant in biomedical constituents, and also contains other bioactive components, which can be used as top value-added materials of high-grade cosmetic, food, spice, and chemical. The result will be useful to expedite biomedical development of root extractives, and to provide further scientific foundation for its top value-added application of bamboo resources.

Abstract: Cinnamomum camphora is a famous non-wood tree, which can be used to extract camphor, C. camphora oil and its ramification. It is an excellent timber tree and evanescence species with the road. Researches about the chemical composition of C. camphora root wood is very less, this restricts the development and utilization of the root of C. camphora. Therefore, we used Py-GC/MS technology to analyze the high-grade resource recovering approaches of C. camphora root wood. After treated with freeze-drying and smashing, samples were extracted by the acetone extraction. After concentration and refrigeration dry, the comminuted power of C. camphora root wood was pyrolyzed in He atmosphere at 750°C, then the pyrolysis product was analyzed by online linked GC/MS. Relative content of each component was determined by area normalization. The analytical result showed that C. camphora root wood can be used as top value-added materials of biomedicine, and also as the materials of bioenergy, perfume, cosmetic, food, dye and industrial solvent.

Abstract: The extractives of bamboo root was often used to cure some intractable diseases in the countryside of China, but the components of bamboo root extract are still unresolved. Therefore, 300 °C-based pyrolysis- GC/MS technology was used to identify and analyze the top value-added biomedical and bioactive components of benzene/ethanol extractives of Moso bamboo root. 45 compounds representing 97.316 % of the total areas were identified (Table 1) from 55 peaks. The main chemical components of benzene/methanol extractives of Moso bamboo root by 300°C-based Pyrolysis- GC/MS are as: 1,3-BENZODIOXOLE, 5-(1-PROPENYL)- (15.263%), NAPHTHALENE (12.316%), 1,2-BENZENEDICARBOXYLICACID,BIS(2-METHYLPROPYL) ESTER (9.385%), BENZENE, 1,2-DIMETHOXY-4-(2-PROPENYL)- (7.624%), 2-PROPENOIC ACID, 3-(2-HYDROXYPHENYL)- (E)- (6.012%), 4-HYDROXY-2-METHYLACETOPHENONE (5.226%), 1,2-BENZENEDICARBOXYLIC ACID, BUTYL2-METHYLPROPYL ESTER (4.328%), etc. The result showed that the 300 °C pyrolyzate of benzene/ethanol extractives of Moso bamboo root is rich in biomedical components, and also contains some bioactive components which can be used as top value-added materials of high-grade spice, cosmetic and food.

Abstract: Py-GC/MS technology was used to analyze the high-grade resource recovering approaches of C. camphora root wood at 350°C. The result showed that the chemical components of acetone extractives from C. camphora root wood are as: Benzene, 1,2-dimethoxy-4-(2-propenyl)- (10.255%), Bicyclo[2.2.1]heptan-2-one, 1,7,7-trimethyl-, (1R)- (7.751%), p-menth-1-en-8-ol (5.765%), Phenol, 2,6-dimethoxy-4-(2-propenyl)- (3.833%), 1,6-Cyclodecadiene, 1-methyl-5-methylene-8- (1-methylethyl)-, [s-(E,E)]- (3.669%), D-Allose (3.265%), Acetic acid (2.784%), 1(2H)-Naphthalenone, octahydro-8a-hydroxy- (2.719%), 1,3-Benzodioxole, 4-methoxy-6- (2-propenyl)- (2.674%), .beta.(3,4-Methylenedioxyphenyl)propionic acid (2.216%), Phenol, 4-methyl- (2.200%), Phenol, 2,6-dimethoxy- (2.138%), 3,4-Methylenedioxyphenyl acetone (2.125%), 5-Hepten-2-one, 6-methyl- (2.075%), 2-Oxabicyclo[2.2.2]octan-6-ol, 1,3,3-trimethyl- (1.808%), Phenol, 2-methoxy-3-(2-propenyl)- (1.688%), etc. The analytical result by 350°C-based Py-GC/MS showed that the 350°C pyrolyzate of acetone extractives from C. camphora root wood can be used as top value-added materials of biomedicine, but also used as the bioactive materials of bioenergy, cosmetic, food, and other industrial solvents.