High-impact biomass-based PVC-U pipeline and preparation method thereof

Abstract

The invention discloses a high-resistance biomass-based PVC-U pipeline and a preparation method thereof, and relates to the technical field of plastic pipeline preparation, and the preparation method comprises the following steps: 1) adding an acrylate copolymer into a high-speed mixer added with nanocellulose, continuously stirring at a high speed, and discharging after the material is completely dried to obtain modified nanocellulose; (2) adding the modified nano cellulose obtained in the step (1), PVC resin, a heat stabilizer, a toughening modifier, an internal lubricant, an external lubricant, a flame retardant and a smoke suppressant into a high-speed mixer, stirring and preliminarily mixing at a low speed, then adjusting the rotating speed of the high-speed mixer to a high speed, stirring at a high speed until the temperature of the material is 100-110 DEG C, and cooling to room temperature; discharging the material into a cold mixer, cooling to 45 DEG C, and discharging to obtain an extrusion material; and 3) transferring the extrusion material obtained in the step 2) into a conical twin-screw extruder for extrusion molding to obtain the high-impact biomass-based PVC-U pipeline, and the tensile strength and impact resistance of the plastic pipeline prepared by the invention are both superior to those of the conventional PVC-U pipeline.

Description

technical field [0001] The invention relates to the technical field of plastic pipes, in particular to a high-resistance biomass-based PVC-U pipe and a preparation method thereof. Background technique [0002] In recent years, in order to implement the national double-carbon policy, policies and regulations on reducing the ecological impact of materials and promoting the recycling of materials have been issued one after another, making advanced functional materials using renewable resources as raw materials one of the research hotspots. Biomass fiber, as a cheap, easy-to-obtain, large-stock, and widely-distributed material, has great potential for development. Filling common thermoplastics with natural and renewable plant fibers not only meets the needs of saving resources and energy consumption, but also achieves the goal of using natural or recyclable materials. Environmental protection requirements of regeneration and environmental degradability. [0003] However, due to...

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Problems solved by technology

[0003]However, due to the huge difference in the surface properties of biomass fibers and PVC, the interface compatibility of the composite material combined with the two is poor, and hydrogen bonds are formed inside the fibers themselves Cause agglomeration, poor mechanical properties

The existing methods generally only focus on the interfacial compatibility, and do not actually consider the fluidity of biomass fibers. Even if the interfacial compatibility is greatly improved, the processing is difficult, which is not conducive to normal production, and most of the methods are poor in environmental protection. High process requirements

CN113024971 provides a method for preparing waste biomass PVC composite pipes, using alkali treatment to improve interfacial compatibility, which has good mechanical properties, but the alkali solution used in the process is not environmentally friendly and healthy

CN107118458A provides a non-foaming PVC-based ultra-high-filling biomass fiber composite material and its preparation method. The compatibility problem is solved by coating the modifier on the surface of the biomass fiber, but the ultra-high filler ratio is not suitable for the pipeline system usage of

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