Degradable lightweight polyolefin composite for injection molding and preparation method of composite
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A composite material and polyolefin technology, which is applied in the field of degradable lightweight polyolefin composite materials for injection molding, can solve the problems of high energy consumption and low output, and achieve the effects of reduced surface area, low wear and extended service life
Active Publication Date: 2017-01-11
水发信达(山东)再生资源科技有限公司
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However, using a co-rotating twin-screw extruder, even if the length-to-diameter ratio of the screw is increased, the particle size and distribution of the dispersed phase of the composite material, the mechanical properties of the composite material, th
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preparation example Construction
[0077] For the specific preparation method, see the operation steps in (2) below.
[0079] (1) Screening and alkalization of rice husk plant fiber powder. In Example 1-7, the impurity-free rice husk was crushed through a 40-60 mesh sieve to obtain a plant fiber powder, and the plant fiber powder was soaked in a 2% mass fraction NaOH solution at 80° C. for 4 hours, and then separated by centrifugation. Machine dehydration to prepare plant fiber filter mud for later use;
[0080] (2) Preparation of hybrid fiber filler modified by mixing rice husk plant fiber mud and nano-silica colloidal solution. In Examples 1-6, the modified hybrid fiber filler is prepared through the following technical scheme:
[0081] a. Take 100 liters of industrial sodium silicate solution with a modulus of 3.0 and a mass fraction of 10% of the prepared silicon dioxide, add it to the reaction ke...
Embodiment 1
[0096] Formula is as follows (parts by weight):
[0097]
[0098] The preparation process is as follows:
[0099] First, use a high-speed mixer to mix the above-mentioned raw materials weighed by weight evenly to obtain a uniformly mixed material; then, put the mixed material into a three-screw extruder for melt blending, and the temperature of each section of the barrel is 120-190 ℃, the rotating speed of the main screw is 110r / min, extrusion, strand drawing, air cooling, pelletizing, sealing and packaging to obtain polyolefin composite materials for injection molding.
Embodiment 2
[0101] Formula is as follows (parts by weight):
[0102]
[0103]
[0104] According to the above formula, the raw materials are weighed in parts by weight, and the preparation process is as described in Example 1.
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Abstract
The invention provides a degradable lightweight polyolefin composite for injection molding and a preparation method of the composite. The polyolefin composite is prepared from secondarily modified fiber mixed filler, polyolefin resin, a toughening agent, a compatilizer, a lubricant and the like through blending and extrusion granulation by a tri-screw extruders which are arranged triangularly and meshed in the same direction, wherein the modified fiber mixed filler is prepared as follows: a natural plant fiber material such as rice husks, chaff and the like are mixed with a nano-silica colloidal solution, a dispersant and a surfactant are added and a blending reaction, drying and other technologies processes are performed; then the modified mixed fiber filler is subjected to secondary surface coupling hydrophobic treatment and blended with polyolefin resin, the toughening agent, the compatilizer and the lubricant. The polyolefin composite has degradability specific to the natural plant fiber filler, has lower density than inorganic mineral filler and has excellent thermoplastic processing characteristics and mechanical properties in the injection molding process.
Description
technical field [0001] The invention belongs to the field of polymer materials, and specifically relates to a degradable lightweight polyolefin composite material for injection molding prepared by modifying natural plant fibers and nano-silica colloidal solutions, and then compounding them with polyolefin resins, and the composite The method of preparation of the material. Background technique [0002] Plastic composite materials refer to materials formed by composite processes of thermoplastic or thermosetting resins as polymer materials and non-polymer materials, additives, etc. There are many non-polymers used in plastic composite materials. People have placed great expectations on the comprehensive utilization of renewable plant fibers from the perspective of sustainable utilization of resources, protection of the environment, and the characteristics of biocompatibility and degradation. It has become a research and development hotspot in the field of plastic composite m...
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