Xin Gong Li

Study on Hot-Pressing Process of Low-Cost Straw Particle Board

The mixture of isocyanate and urea-formaldehyde adhesive resin was used to manufacture low-cost straw particle board by hot-pressing process. Influence of the hot-pressing temperature, hot-pressing time, board density and the amount of isocyanate adhesive on straw particle board mechanical properties were studied. The resulted showed that, within a certain range, the straw particle board physics performance was improved with the increase of hot-pressing temperature, hot-pressing time, board density and the amount of isocyanate adhesive. The proper hot-pressing process of cost-straw particleboard is hot-pressing time for 40s/mm, MDI applied amount of 3%,a density of 0.7 g/cm3, hot-pressing temperature of 180 °C

Study on Technology of Bamboo Processing

This paper introduced characteristics and sorts of bamboo composite materials, elaborated processing technology and technological features of different bamboo composite materials, analyzed current status of bamboo processing industry in China, brought up some problems, and to look into the research direction and future of bamboo composite materials in China.

Preliminary Research on Manufacturing Technology of Thin Bamboo Veneer Consolidated Composite Floor

In this paper, the new bamboo-based consolidated composite floors were fabricated with thin bamboo veneers which used as decoration layers, wear resistant layers, high density fiberboards and equilibrium layers through assembling and scuffing. The effect rules of the composite floor on properties were preliminarily studied by three factors: hot-pressing temperature, pressure and time. The results showed that the wear resistance and surface bond strength of the thin bamboo veneer consolidated composite floor significantly increased with the rise of hot-pressing temperature. In the scope of resources, the effect of hot-pressing pressure and time on properties of the floor is not significant. The optimizing technology is hot-pressing temperature 170°C, pressure 3MPa and time 40s/mm in this study. The thin bamboo veneer consolidated composite floor is an excellent floor decorative material, which has good physical and mechanical properties.

Effect of the Interface Control Process of Wood Fiber/PLA on Properties of Composites

Biodegradable composites of wood fiber/PLA were fabricated by using stearic acid and titanate’s regulation on the interface of wood fiber/PLA with injection molding processing. The effects of the dosage of regulation agent on the mechanical and biodegradable properties were discussed. The results reveal that the tensile strength and impact strength were fabricated greatly after the process of regulation agent on wood fiber, however, the effect of titanate is much better than that of stearic acid as regulation agent. Both of them could improve the biodegradable properties of the composite.

Steam-Injection Pressing Technology of Man-Made Board

Steam-injection pressing technology is a kind of new hot-pressing technology researched and developed in recent years, its hot-pressing performance significantly better than traditional hot-pressing. The technical principle, method and research progress of steam-injection pressing technology was reviewed in detail and its future research trend is also outlined.

Study on Dyeing Properties of Acid Dyes for Different Tree Species

Use acid scarlet3R ,acid orangeⅡ,acid black ATT and black powder as pigment,prepare for Acid Color, choose four fast growing woods-Chinese fir, poplar, eucalyptus and rubber wood as research objects, study on dyeing properties and dyeing effects of acid dyes for different tree species. It is found, there are differences in staining effects for four fast growing woods. Attachment properties of dyestuff solution on Chinese fir is good, but dyes proportion is very poor; Attachment properties of dyestuff solution on poplar is good, but dyes proportion is very poor; Both attachment property of dyestuff solution and dyes proportion of eucalyptus are not good; Both attachment property of dyestuff solution and dyes proportion of rubber wood are good.

Study on Properties of Recycled Fiber from Waste Newspaper / PLA Composites

Prepare composite materials with recycled fibers from waste newspaper and PLA by inject-molding process, and study on recycled fiber of the modified-property treatment of silane coupling agent and alkali deinking treatment influence properties of composite materials. It is found out that, recycled fibers under the modified-property treatment of silane coupling agent and under alkali deinking treatment can effectively improve compatibility between recycled fibers and PLA, and improve mechanical properties and water absorbency of composite materials.

Study on the Modified Effect of Wood Fiber by Silane Coupling Agent

In order to improve the interface compatibility of wood fiber and the polylactic acid (PLA), the silane coupling agent to modify the wood fiber was chosen. The Modified Effect of silane coupling agent on the wood fiber is judged inrectly by feat of the modification of viscosity characteristic of the mixed system of wood fiber and the liquid paraffin. The dosage of the silane coupling agent influenced the modification effect the most is shown in the research, the modification temperature, stirring speed and the modification time are followed.

Study on Old Newspaper Recycling Fiber-Reinforced PLA Composites

In the research, old newspaper recycling fiber-reinforced polylactic acid composites were produced by using injection molding technology. The influences of MAPP coupling agent and newspaper alkali deinking treatment on the performance of composite materials were studied. The results showed: MAPP can effectively improve the compatibility of old newspaper recycling fibers and PLA and increase the mechanical properties of composites; the alkali deinking treatment can effective improve the adhesion of newspaper recycling fibers and PLA and increase the mechanical properties of composites.

Carboxylation Modification of Fiber Reclaimed from Old Newspapers and its Effects on Properties of the Reinforced Polylactic Acids Composites

In order to make full use of old newspapers and preserve precious plant resource, old newspapers were reclaimed and refined into fiber, then phthalic anhydride (PA) was utilized to modify the reclaimed-fiber on the condition of ultrasonic radiation. Subsequently, reclaimed-fiber was mixed with polylactic acids (PLA) to obtain composites by means of extrusion molding. At last, mechanical performances of the composite were tested. Results reveal that: composite made form PLA and the PA treated reclaimed-fiber from old newspapers has good mechanical performances, and its tensile strength is higher than 41.5MPa while impact strength is no less than 7.3KJ/m2. Moreover, the optimum processing conditions for modifying reclaimed-fiber with PA are: mass fraction of phthalic anhydride to old newspaper reclaimed fiber 5%, ultrasonic radiation time 15min, and modification temperature 90°C.