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A kind of polyvinyl alcohol/shell powder biomass composite material and preparation method thereof

A polyvinyl alcohol and composite material technology, applied in the field of polyvinyl alcohol/shell powder biomass composite material and its preparation, can solve the problems of material cost reduction, low production efficiency, secondary pollution, etc., and achieve improved mechanical properties and fracture The effect of elongation, improving resource utilization rate, and good thermoplastic processing performance

Active Publication Date: 2017-06-27
安徽瑞鸿新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] (1) Since the polymer matrix used is mostly non-polar polymers such as polyethylene, polypropylene, and natural rubber, in order to improve the compatibility between the polar filler shell powder and the polymer, it is necessary to chemically treat the surface of the shell powder , which will lead to complex process and low production efficiency;
[0005] (2) Because it is difficult to realize the uniform dispersion of high-filling shell powder in the polymer matrix by traditional polymer melt extrusion processing methods, it will undoubtedly reduce the mechanical properties of high-content shell powder composite materials, thereby limiting the use of this material. In order to reduce The impact of shell powder on the mechanical properties of composite materials, usually the filling amount of this shell powder is less than 25wt%, which not only limits the resource utilization of shells, but also limits the cost reduction of materials
[0006] (3) Because the base resins such as polyethylene and polypropylene are difficult to degrade under natural conditions, it will cause secondary pollution

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] First, add 50 parts of shell powder that has been washed and dried to an average particle size of 0.1 mm and 50 parts of polyvinyl alcohol with a degree of polymerization of 2400 and a degree of alcoholysis of 88% into a disc-shaped mechanochemical reactor. The solid-phase shear pulverization mixes 35 times under min, and the polyvinyl alcohol / shell powder biomass mixture that obtains shell powder average particle size is 0.1 μ m; The gained mixture is mixed with 15 parts of water, Add the compound plasticizer composed of pentaerythritol and acetamide into a high-speed mixer and mix for 5 hours at 55°C at a speed of 500r / min; put the resulting mixture into a twin-screw extruder at a speed of 100r / min at an extrusion temperature of 205°C Melt-extrusion and granulation are performed to obtain a melt-processable polyvinyl alcohol / shell powder biomass composite material.

[0039] The melting point of the composite material is 191°C, the thermal decomposition temperature is ...

Embodiment 2

[0041] First, add 70 parts of shell powder that has been washed and dried to an average particle size of 3.1mm and 30 parts of polyvinyl alcohol with a degree of polymerization of 1700 and a degree of alcoholysis of 99% into a disc-shaped mechanochemical reactor. Lower solid-phase shearing pulverization mixes 20 times, and the polyvinyl alcohol / shell powder biomass mixture that obtains shell powder average particle diameter is 7.1 μm; Gained mixture is mixed with 18 parts of water, propane Add the compound plasticizer composed of triol and ethanolamine into a high-speed mixer, and mix for 4 hours at 70°C at a speed of 700r / min; put the resulting mixture into a twin-screw extruder at a speed of 150r / min and an extrusion temperature of 195°C Melt extrusion and granulation can produce melt-processable polyvinyl alcohol / shell powder biomass composite material.

[0042] The melting point of the composite material is 172°C, the thermal decomposition temperature is 262°C, the tensile...

Embodiment 3

[0044] First, add 55 parts of shell powder that has been washed and dried to an average particle size of 7.8mm and 45 parts of polyvinyl alcohol with a degree of polymerization of 2000 and a degree of alcoholysis of 99% into a disc-shaped mechanochemical reactor, at a speed of 200r / min Lower solid-phase shear pulverization mixes 30 times, obtains shell powder average particle diameter and is the polyvinyl alcohol / shell powder biomass mixture of 86 μm; Gained mixture is mixed with 22 parts of water, urea and Add the composite plasticizer composed of polyethylene glycol with a number average molecular weight of 2000 into a high-speed mixer, and mix for 4.5 hours at 60°C at a speed of 600r / min; min, melt-extruded at an extrusion temperature of 183°C, and granulated to obtain a melt-processable polyvinyl alcohol / shell powder biomass composite material.

[0045] The melting point of the composite material is 164°C, the thermal decomposition temperature is 248°C, the tensile strengt...

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Abstract

The present invention discloses a polyvinyl alcohol / shell powder biomass composite material. The polyvinyl alcohol / shell powder biomass composite material is formed by fusing and blending the following components in parts by weight: 20-80 parts of polyvinyl alcohol, 20-80 parts of shell powder and 10-30 parts of a plasticizer; and the fusing point of the composite material is 155-200 DEG C, the thermal decomposition temperature is 230-270 DEG C, the tensile strength is 30-80MPa and the elongation at break is 80-300%. The present invention further discloses a preparation method for the polyvinyl alcohol / shell powder biomass composite material. Polyvinyl alcohol and the polar shell powder in the composite material disclosed by the present invention have good natural compatibility, and the shell powder is uniformly dispersed in a polyvinyl alcohol base body by adopting a milling-disc-shaped force chemical reactor, so that the filling amount of the shell powder is greatly increased under the condition of not adding a surface modifying agent and a mobile modifying agent, and the mechanical property and elongation at break of the composite material are also improved; and meanwhile, the preparation method has a simple process and short flow, and has no three-waste pollution in a production process, and the industrialized production is liable to realize.

Description

technical field [0001] The invention belongs to the technical field of polymer / biomass composite material and its preparation, and in particular relates to a melt-processable polyvinyl alcohol / shell powder biomass composite material and a preparation method thereof. Background technique [0002] In today's increasingly severe resource shortage and environmental pollution crisis, making full use of renewable resources, developing environmentally friendly materials, reducing pollution, and protecting the environment have become urgent tasks for national economic development. Natural shells are formed by the long-term mineralization of molluscs, which are typical organic / inorganic hybrid materials and are important bio-renewable resources. In recent years, with the rapid development of my country's shellfish farming industry, a large number of discarded shells have formed many "shell mountains" in coastal areas, which not only wastes valuable bio-renewable resources, but also i...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L29/04C08K9/00C08K3/26
Inventor 陈宁王琪李莉韩瑞芹华正坤
Owner 安徽瑞鸿新材料科技有限公司
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