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Polylactic acid based neutron shielding composite material and preparation method thereof

A composite material, polylactic acid-based technology, used in the field of ray shielding materials and nuclear radiation protection, can solve the problems of poor effect and high cost, and achieve the effects of simple preparation process, good flame retardant performance, and high neutron shielding performance.

Inactive Publication Date: 2018-02-16
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Technical problem to be solved: This application mainly proposes a polylactic acid-based neutron shielding composite material and its preparation method, which solves the technical problems of high cost and poor effect in the prior art, and has good mechanical properties, flame retardancy, Thermal neutron shielding properties and fully biodegradable neutron shielding composites

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] A polylactic acid-based neutron shielding composite material, the formula is: polylactic acid 100g, PBAT toughening agent 10g, B 4 C powder 80g, aluminum hydroxide powder 15g, DL-411 coupling agent 2g. Among them, the density of polylactic acid is 1.27g / cm 3 , the density of PBAT toughening agent is 1.23g / cm 3 , B 4 The particle size of C powder is 50um, the purity of aluminum hydroxide powder is 99.5%, and the particle size is 5um.

[0021] The preparation method of polylactic acid-based neutron shielding composite material comprises the following steps:

[0022] The first step, polylactic acid modification treatment: the temperature of the screw machine feeder is set at 180°C, and the polylactic acid and the toughening agent PBAT are added to the feeding port of the screw machine for melt blending for 8 minutes until the toughening agent and polylactic acid Mix well to obtain polylactic acid mixture.

[0023] The second step, surface modification treatment of fun...

Embodiment 2

[0031] The formula of the polylactic acid-based neutron shielding composite material with easy degradability is: polylactic acid 80g, PBAT toughening agent 40g, B 4 C powder 60g, aluminum hydroxide powder 15g, DL-411 coupling agent 2g. Among them, the density of polylactic acid is 1.27g / cm 3 , the density of PBAT toughening agent is 1.23g / cm 3 , B 4 The particle size of C powder is 50um, the purity of aluminum hydroxide powder is 99.5%, and the particle size is 5um.

[0032] The preparation steps of the polylactic acid-based neutron shielding composite material with easy degradability are as follows:

[0033] The first step, polylactic acid modification treatment: the temperature of the screw machine feeder is set at 180°C, and the polylactic acid and the toughening agent PBAT are added to the feeding port of the screw machine for melt blending for 8 minutes until the toughening agent and polylactic acid Mix well to obtain polylactic acid mixture;

[0034] The second step...

Embodiment 3

[0042] The formula of polylactic acid-based neutron shielding composite material with easy degradability is: polylactic acid 70g, PBAT toughening agent 35g, B 4 C powder 40g, aluminum hydroxide powder 15g, DL-411 coupling agent 2g. Among them, the density of polylactic acid is 1.27g / cm 3 , the density of PBAT toughening agent is 1.23g / cm 3 , B 4 The particle size of C powder is 50um, the purity of aluminum hydroxide powder is 99.5%, and the particle size is 5um.

[0043] The preparation steps of the polylactic acid-based neutron shielding composite material with easy degradability are as follows:

[0044] The first step, polylactic acid modification treatment: the temperature of the screw machine feeder is set at 180°C, and the polylactic acid and the toughening agent PBAT are added to the feeding port of the screw machine for melt blending for 8 minutes until the toughening agent and polylactic acid Mix well to obtain polylactic acid mixture;

[0045] The second step, su...

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Abstract

The invention discloses a polylactic acid based neutron shielding composite material and a preparation method thereof, relates to the field of composite materials for radiation protective clothing anda preparation method, and aims to treat radiation protective clothing which is polluted by a radioactive source. The preparation method comprises the following steps: fusing and blending polylactic acid which is a polymer material capable of being completely degraded with a toughening agent for modification; adding a polylactic acid based mixture, a neutron absorber material and a flame-retardantfilling material in an open mixing machine, and carrying out plastication to obtain the polylactic acid based composite material. The material has thermal neutron shielding property and good flexibility, flame retardancy and mechanical property. After being polluted by the radioactive source, the polylactic acid based neutron shielding composite material used as radioactive protective clothing for nuclear power is easily degraded, and no pollution exists in aftertreatment.

Description

technical field [0001] The invention belongs to the field of nuclear radiation protection and radiation shielding materials, and in particular relates to a polylactic acid-based neutron shielding composite material and a preparation method thereof. Background technique [0002] With the rapid development of the nuclear industry, more and more people are paying attention to its radiation safety and radiation protection. At present, traditional neutron radiation protective clothing is mainly made of fiber cloth and silica gel. After being contaminated by radioactive sources, there are problems such as difficulty in decontamination and easy generation of secondary pollution. Therefore, it has become an urgent technical problem in this field to develop a neutron shielding composite material that can be better post-processed after contamination by radioactive sources. Contents of the invention [0003] Technical problem to be solved: This application mainly proposes a polyla...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L67/04C08L67/02C08K3/22C08K3/38G21F1/10
CPCC08L67/04C08K2003/2227C08L2201/02C08L2201/06C08L2201/08G21F1/103C08L67/02C08K3/22C08K3/38
Inventor 汤晓斌陈托陈飞达张云
Owner NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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