Study On High Yield Pulp Reinforced Polyamide Resin Composite

Plant fiber reinforced thermoplastic composite is an important researching project in the field of material science and forest products industry in the new century. This composite material which has become one of the new type materials that many countries are trying to develop has many advantages, such as good mechanical properties, lightness, low price and good processability, and it can be widely used in automobile, machinery, electric appliance, building materials and decoration etc.In this paper bamboo steam explosion pulp reinforced polyamide resin composite and masson pine TMP reinforced polyamide resin composite were developed with the pulps as reinforced material and nylon-6 as matrix material. High yield pulping, synthesis of interfacre modifying agent, manufacture and properties of high yield pulp reinforced polyamide resin composite were studied. At the same time, microscopic structure, interface modifying and chemical bonding mechanism in high yield pulp reinforced polyamide resin composite were deeply investigated.Technology and mechanism of bamboo steam explosion pulping (SEP) were investigated. Effect of explosion treatment on fiber morphology was studied. Technologies of bamboo steam explosion pulping were developed. The optimal conditions of bamboo chemical pretreatment were NaOH dosage of 2%, Na₂SO₃ dosage of 15%, time of 120min at 130℃. Bamboo SEP with breaking length up to 3300 m was obtained by suitable processing conditions of pretreatment and steam explosion. When pretreated bamboo was exploded by steam, fibers of bamboo were curled, and some of fibers were fibrillated. Bamboo SEP had higher breaking length than bamboo chemical mechanical pulp (CMP). Specific energy consumption of producing bamboo SEP was about 30% less than that of producing bamboo CMP.Character of impinging stream drying of fibers was studied. Heat and mass transfers during impinging stream drying process were investigated. Effect of impinging stream drying on morphology, strength and dispersivity of fiber was probed. Technology of impinging stream drying was first applied to dry plant fiber pulp at home and abroad. This work could provide...