Study On Bamboo Plastic Composite And Its Geotexile

Composite, possessing of many good qualities, is a representation of new stuff and attains the global recognition. The characteristics of composite are not only possessing of original feature but also having new performance other than former material. The plant fiber reinforced thermoplastic composite has many advantages in good mechanic function, excellent manufacture function, light weight, low price. The study on plant fiber reinforced thermoplastic composite, especially the wood fiber reinforced thermoplastic composite, is hot spot in material scientific research in new century. Our country always is called "bamboo kingdom". Bamboo fiber has many advantages in low great and price. In the poor-wood-resource times, the research on bamboo fiber composite signify much. However, the study on bamboo fiber reinforced thermoplastic composite doesn't meet with much recognition.This item is utilized the bamboo fiber substituting the section of glass fiber and produce bamboo fiber and glass fiber reinforced polypropylene composite. This kind of composite will be applied to manufacture geotextile. Character of impinging stream drying of bamboo fibers, manufacture and properties of the composite are studied. At the same time, microscopic structure and interface modifying in bamboo fiber and glass fiber reinforced polypropylene are deeply investigated.Character of impinging stream drying of fibers is studied. Heat and mass transfers during impinging stream drying process are investigated. Effect of impinging stream drying on morphology, strength and distribution of fiber is probed. Technology of impinging stream drying is first applied to dry plant fiber pulp at home and abroad. This work could provide technical support for thepreparation of high dispersed plant fibers required for plant fiber reinforced thermoplastic composite. At the condition of maintaining the quality of fibers, high speed of hot gas stream has little effect on strength, length and distribution of fibers, so hot gas stream of high temperature can be used to intensify efficiency of plant drying. The dryness and mass flow rate of inlet pulp have much effect on distribution of dried plant fibers, so the suitable preceding water content ratio is 376%. The optimal conditions of drying bamboo fiber are: speed of hot gas stream 31.4m/s, mass flow rate 0.028kg/kg , preceding perfectly water content ratio of inlet pulp 376% and temperature of hot gas stream higher than 110 C.The production, mechanic function, thermal function and manufacturing function of composite are studied. The result shows that the quantity of bamboo fiber is main factors. The best capacity of fiber corresponding to a single property index can be confirmed by the parabola equation. Furthermore, by combined the method of main composition analysis with the parabola equation, the optimum bamboo fiber content of bamboo plastic composite is 27.28%. When bamboo fiber charge is 27.28% ,glass fiber charge is 10% and interfacial modifying agent charge is 4%, main properties of composite are as follows : tensile strength 30.79MPa, flexural strength 42.76MPa , impact strength 7.87KJ/m2 , heat distortion temperature 93.06 C, melt flow rate 1.49g/10min.The mechanism of the composite is studied with SEM and DSC. The photograph from SEM shows that coupling agent stimulates formation of resin cover in the surface of fiber, and then improves surface's cohesive intensity and mechanic function significantly. The curve from DSC shows that the additive-bamboo fiber with the treatment with coupling agent increase glassifing temperature of composite, which implies that the surface of the fiber prevents the action of polypropylene.Finally, the bamboo fiber and glass fiber reinforced polypropylenecomposite is applied to manufacture geotexile. As the quantity of fiber increases, largest tensile strength of the geotexile increases and lengthen ration decrease. When bamboo fiber charge is 20% and glass fiber charge is 10%, main properties of geotexile made by the composite are as follows: la...