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In order to eliminate colour difference of bamboo sheets, the energy saving technique of bamboo bleaching rapidly based on water resource protection was studied. The results showed that the appropriate addition agent may improve function of H2O2 bleaching bamboo. the oxidation of H2O2 was the best at 80°C. If the temperature was too low or too high, the bleaching effect was bad. And the bleaching...
Eucalyptus urograndis leaves are cheap and fine natural resources. Therefore, GC/MS was used to analyze high-grade bioenergy utilization of acetone extractives of Eucalyptus urograndis leaves. 43 compounds in the extractives were identified. The mainly abundant constituents were 1,2,3-butanetriol (33.25%), ethyl.alpha.-d-glucopyranoside (13.48%), thiazolidin-4-one, 3-(9H-xanthen-9-yl)-2-thioxo- (12...
The dynamic thermal mechanical properties of Bamboo fiber(BF)/Polylactic Acid(PLA) composites were studied by the thermal dynamic mechanical analyzer (DMA). The results showed that E' and tanδ were affected by mass fraction of BF and coupling agent. Because interfacial compatibility between BF and PLA was poor, the dynamic thermal mechanical properties of composites were bad when coupling agent was...
The fibre-reinforced green composites made from bamboo fibre and biodegraded resin(Polylactic Acid) were fabricated by injection molding, effects of alkali treated bamboo fibres on mechanical properties (tensile strength and impact strength) of fibre-reinforced green composites were studied, and variance of main chemical components of alkali treated bamboo fibres and untreated bamboo fibres was characterized...
In order to eliminate colour difference of bamboo sheets and prevent bamboo moldy, the energy saving biotechnique of bamboo bleaching rapidly based on water resource protection was studied. The results showed that The H2O2 concentration on the impact of white degree was significant at 0.05 level. And white degree increased at first, then decreased with concentration of H2O2. the best concentration...
Plantations have been planted in large area in South China now. A mass of leaves was naturally abandoned and degradable so that the resources were wasted. Therefore, in order to make full use of the leaves resources, the effect of bioactive substance in leaves on bamboo biomass moulding was studied based on full-factor test. The result is: (1) Tree species of leavies extractives had highly obvious...
Based on the single-factor method, the fresh Cunninghamia lanceolata shavings were treated by means of the alkali liquor extraction under pulsed electromagnetic fields to obtain the best extraction technology. The results are as follows: (1) During the the sorbitic-extracting process, Extraction time had significant effect on the leaching rates at 0.1 level. And sort of alkaline had significant effect...
Cunninghamia lanceolata is medicinal plant in South China, and its wood extractives are greatly applied in the therapy and protection of human diseases. Therefore, the nano biomedical components of the acetic ether extractives of Cunninghamia lanceolata biology were studied by Py-GC/MS to find new specific drug. 93 compounds of the extractives were identified. The main constituents were cedrol (18...
In this paper, a patch antenna with an PBG (photonic band-gap) structure was studied by FEM method, and the theory of PBG structure was introduced. The Ansoft HFSS is used for the simulation. A comparison between the conventional patch antenna and the new PBG antenna is given. It is shown that the surface waves propagating along the substrate surface can be suppressed by the periodic structure due...
The technology for removing oleoresin from masson pine wood without waste water is an great market demand. What is worse is that the current consumption of skim a lot of energy technology.The result is as follows: (1)The influence of the sulfur addition on the quantity of dissolved resin is remarkable.The influence of the other factors is not remarkable. (2) The ideal deresination technology is: The...
The high-grade resource recovery on acetic ether extractives in E. camaldulensis wood was analyzed by means of Py-GC/MS, and relative content of each component was determined by area normalization. Results showed that main constituents of acetic ether extractives were ergosta-4,6, 22-trien-3.beta.-ol (12.53%), 1-phenanthrenecarboxylic acid, 1,2,3,4,4a,9,10,10a-octahydro -1,4a-dimethyl-7-(1- methylethyl)-,...
In this paper a coplanar resonator (CPR) structure have been estimated using a full wave spectral domain technique in conjunction with the complex resistive boundary condition. The computer aided design method developed is applied to simulate the characteristics of coplanar resonators. To minimize the radiation loss, the coplanar resonator is usually housed in a conductive cavity. The coupling of...
Now Eucalyptus wood begins to be used to pulp. The leaching rule of nano particles from E.camaldulensis wood has an important significance in the forestry research and paper making engineering. Therefore, based on the single-factor method, the fresh E. camaldulensis shavings were treated by LiOH in a concentration range of 0.5%~25% g/mL and the duration is 3, 16 and 24 hours respectively. The extraction...
The global economy is facing economic crisis at present. And all the industries are face to serious problem relative to their fates. In addition, the bamboo industry in China is not relating to ecological environment construction for low utilization rate of raw materials, high energy consumption and low products extra value. therefore, the development model and countermeasure is urgent to be studied...
In order to purify blogical Chinese herbal medicine from wood etractives and hmicellulose at the molecular level, the fresh Chinese-fir cells were extracted in LiOH solution, and were analyzed by ZETA and SIZER to find out the leaching rule of nano particles in Chinese-fir cells. The results are as follows: (1) The extraction mass arrived at the maximum value when LiOH concentration is about 17.5%...
Deresination process, which usually consume a large quantity of water, is widely applied to enhance the addded value of pine wood processing utilization. In order to reduce the consumption of water resource, deresination technology on Pinusmassoniana wood was investigated. Results showed that the influence of the degreasing temperature on the of the intermediate deck and the core layer of Pinusmassoniana...
In order to overcome the above-mentioned negative effects, the fresh Chinese-fir shavings were extracted in KOH soultion, were analyzed by ZETA and SIZER to find out the leaching rule of nano particles in Chinese-fir wood. The results are as follows: (1) The extraction mass arrived at the maximum value when KOH concentration is about 17.5%. The micro/nano particles in Chinese-fir shavings would be...
Formaldehyde release not only pollutes indoor environment, but also severely impairs health of human body. Therefore, a novel technology using the mold pressing was introduced to realize binder-less agglutination in wood-based panel and to earnestly safeguard the health of consumer and the indoor environment. Thermo-gravimetric analysis and conventional measurement were performed to determine the...
In order to explore the potential of Phyllostachys pubescens used as resources utilization on biomedical, determination of the chemical components in five-year-old Phyllostachys pubescens was carried out by means of Py-GC/MS. 69 peaks were obtained from Phyllostachys pubesces and 62 compounds which occupy 99.99% of the total peaks areas were identified. The main components in Phyllostachys pubescens...
The pyrolytic products of Dendrocalamusbarbatus organism body is of important value in healing some diseases. Therefore, the determination of the chemical components from the five-year-old Dendrocalamusbarbatus was made by using Py- GC/MS. The results indicated that the main components of the Dendrocalamusbarbatus by Py-GC/MS analysis were carbon dioxide (54.34%), 2-butanamine, (s)- (17.4%), oxirane,...
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