CN109438897A - A kind of gamma Rays protection composite material and preparation method - Google Patents
A kind of gamma Rays protection composite material and preparation method Download PDFInfo
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- CN109438897A CN109438897A CN201811299881.6A CN201811299881A CN109438897A CN 109438897 A CN109438897 A CN 109438897A CN 201811299881 A CN201811299881 A CN 201811299881A CN 109438897 A CN109438897 A CN 109438897A
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- composite material
- gamma rays
- density polyethylene
- linear low
- low density
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L51/00—Compositions of graft polymers in which the grafted component is obtained by reactions only involving carbon-to-carbon unsaturated bonds; Compositions of derivatives of such polymers
- C08L51/06—Compositions of graft polymers in which the grafted component is obtained by reactions only involving carbon-to-carbon unsaturated bonds; Compositions of derivatives of such polymers grafted on to homopolymers or copolymers of aliphatic hydrocarbons containing only one carbon-to-carbon double bond
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/02—Elements
- C08K3/08—Metals
- C08K2003/0837—Bismuth
Abstract
The present invention provides a kind of gamma Rays to protect composite material and preparation method, the radiation protection composite material is with the linear low density polyethylene (LLDPE) of modified by maleic acid anhydride graft for matrix resin, using low melting point bismuth alloy as antiradiation agent, it is equipped with rheology modifier, the gamma Rays protection composite material that antioxidant is produced.It is prepared, and according to determining component proportion, is placed in mixer after each component is mixed, melt blending is produced at 160-180 DEG C.Gamma Rays protection composite material provided by the invention has good flexibility, lower temperature resistance, resistance to ag(e)ing, shielding property excellent, and production and processing method is easy.Gamma Rays protection composite material provided by the invention has wide practical use in fields such as aerospace industry, nuclear energy nuclear power, Radiation Medicines.
Description
Technical field
The present invention relates to gamma Rays protection technology fields, are to be related to one kind for protecting gamma-rays more specifically
The composite material and preparation method of radiation.
Background technique
In recent years, with the fast development in the fields such as China's aerospace industry, nuclear energy nuclear power, Radiation Medicine, generation is radiated
Influence of the various rays to the mankind and environment is increasingly taken seriously.Wherein gamma-rays be a kind of wavelength is short, penetration capacity is extremely strong,
The high electromagnetic wave of energy can cause the diseases such as biological cell mutation, hematopoiesis function missing, cancer.Traditional gamma Rays
Protective materials mainly uses stereotype, flint glass, concrete, heavy metallic oxide and high hydrogeneous organic compound etc., by γ
The work and life environment of ray radiation source and people separate, to protect injury of the gamma-rays to human body.Gamma-rays of the invention
Radiation protection material, antiradiation agent have good dispersibility in matrix resin, have that light weight, shielding property be good, Yi Jia
The advantages that work, process are environment-friendly, easy to industrialized production, use scope is wide.
In order to obtain better gamma Rays protective materials, researcher has done many research and developments, such as publishes
In " the active Bi of " functional material "2O3The preparation and the research of gamma Rays protective performance of/rubber composite material " (Wei Xia, Zhou Yuan
Woods etc., [J] functional material, 2013,44 (2) 216-220), it has studied with bismuth oxide (Bi2O3) it is antiradiation agent, with rubber
For the preparation method and performance of gamma Rays protective materials made of matrix；Publish " plastics industry " " radiation protection is leaded
Preparation and performance of organic glass " (Jiang Pingping, Shen Fenglei etc., [J] plastics industry, 2000,28 (4) 17-18) etc., have studied with
Metallic lead is antiradiation agent, using organic glass as the preparation method and performance of gamma Rays protective materials made of matrix.Lead
It is the optimal antiradiation agent of performance generally acknowledged at present with bismuth, typically with lead and bismuth metal powder, metal oxide or metal
The form of salt is added in basis material.But since they are not melted in process, in process to processing
The loss of equipment is big, and processing difficulties, dispersion performance is poor, influences the radiation protection performance of material.
Summary of the invention
For deficiency existing for existing gamma Rays protective materials technology, the purpose of the present invention is intended to provide a kind of new
Gamma Rays protect composite material and preparation method, to solve to add existing for the gamma Rays protective materials of the prior art
The problems such as work performance is poor, production and processing is difficult, product radiation resistance obtained is undesirable.
Gamma Rays provided by the invention protect composite material, are poly- with the linea low density of modified by maleic acid anhydride graft
Ethylene (LLDPE) is equipped with rheology modifier, one that antioxidant is produced using low melting point bismuth alloy as antiradiation agent for matrix resin
Kind gamma Rays protect composite material, and constituent component includes: in parts by weight
The modifying linear low-density polyethylene has for linear low density polyethylene through modified by maleic acid anhydride graft following
The modifying linear low-density polyethylene of molecular structure:
In above-mentioned technical proposal of the invention, the low melting point bismuth alloy is the fusing point temperature being made of bismuth, tin, lead and cadmium
The bismuth alloy that degree is 100-120 DEG C.
In above-mentioned technical proposal of the invention, the modifying linear low-density polyethylene are as follows: linear low density polyethylene
(LLDPE) using maleic anhydride as grafted monomers, with cumyl peroxide (DCP) for initiator, at a temperature of 180 DEG C -190 DEG C
The modifying linear low-density polyethylene of fusion-grafting preparation, wherein the weight consumption of maleic anhydride is linear low density polyethylene
3-5%, the weight consumption of cumyl peroxide are the 0.3-0.6% of linear low density polyethylene.Further, described linear
Low density polyethylene (LDPE) preferentially selects linear low density polyethylene of the melt index (MI) (MI) between 0.25-4.00.
In above-mentioned technical proposal of the invention, the rheology modifier is preferably selected from fluororesin, polyethylene wax and crystallite
Wax.
In above-mentioned technical proposal of the invention, it is 264 or/and 1010 antioxygen that the antioxidant, which preferentially selects the trade mark,
Agent.
Gamma Rays protection composite material provided by the invention can be prepared as follows: according to determining component
Proportion is placed in mixer after mixing each component, and melt blending is produced at 160-180 DEG C.
Using low melting point bismuth alloy as antiradiation agent, composite material, institute are protected by the gamma Rays of matrix resin of LLDPE
The Key technique problem to be solved is that since low melting point bismuth alloy is highly polar substance, and matrix resin LLDPE is low pole
Substance, according to " similar compatibility " principle between substance, it is generally the case that low melting point bismuth alloy and LLDPE tree as metal
Lipid phase is held poor.Therefore, the technical problem to be solved by the present invention is to how improve the polarity of LLDPE resin.Inventor passes through reason
By analysis and many experiments, using modified by maleic acid anhydride graft LLDPE resin, introduced on the nonpolar main chain of LLDPE strong
Polar maleic anhydride side group has it with highly polar low melting point bismuth alloy to substantially increase the polarity of LLDPE resin
There is excellent compatibility.
Gamma Rays protective materials provided by the invention selects low melting point bismuth alloy and LLDPE as producing gamma-rays
Radiation protection material takes full advantage of the characteristic of both raw material.Bismuth metal is as a kind of novel " green metal ", to human body
With it is environmental-friendly, have good shielding action to gamma-rays, be the substitute of good gamma Rays protective agent.LLDPE belongs to
In high hydrogeneous organic compound, there is certain shielding action to gamma-rays, LLDPE in addition to the performance with polyolefin resin,
Tensile strength, tearing toughness, environmental stress cracking resistance, resistance to low temperature be superior to HDPE (high density polyethylene (HDPE)) and
LDPE (low density polyethylene (LDPE)).Gamma Rays protective materials provided by the invention, fills the performance of two kinds of basic materials
Distribution is waved, and therefore, has good flexibility, lower temperature resistance, resistance to ag(e)ing and excellent gamma-rays shielding property, and produce
Processing method is easy, and production process whole process takes physical method to solve the problems, such as, organic solvent-free, free from environmental pollution and safety
Height is very suitable for the flow line production of automation.It can be widely used for the fields such as aerospace industry, nuclear energy nuclear power, Radiation Medicine.
Gamma Rays protection composite material and preparation method provided by the invention compared with prior art, sums up
With following beneficial technical effect very outstanding:
1. the present invention uses low melting point bismuth alloy for gamma-ray antiradiation agent, the fusing point of low melting point bismuth alloy is only 100-
120 DEG C, therefore processing performance is good, entire production and processing is convenient to be easy, safe and environment friendly and pollution-free.The low melting point bismuth alloy can
From the direct acquisition in market.
2. the present invention uses low melting point bismuth alloy for antiradiation agent, low melting point bismuth alloy is one kind by bismuth, tin, lead and cadmium etc.
Raw material by a certain percentage, made of fusing by special process, with fusing point, invade by low, anti-radiation, uniform in material, solvent resistant
The advantages that erosion, not oxidizable and any surface finish.Gamma Rays as made from it protect composite material to have good gamma-rays
Radiation protection performance (see specific implementation part table 2).
3. gamma Rays protection composite material provided by the invention uses LLDPE for matrix resin, LLDPE belongs to height and contains
Hydrogen organic compound has certain shielding action to gamma-rays.For LLDPE in addition to the performance with polyolefin resin, anti-tensile is strong
Degree, tearing toughness, environmental stress cracking resistance, resistance to low temperature are superior to HDPE (high density polyethylene (HDPE)) and LDPE is (low
Density polyethylene), therefore, gamma Rays prepared therefrom protect composite material, correspondingly have good tensile strength, soft
Toughness, lower temperature resistance (see specific implementation part table 2).
Specific embodiment
Specific embodiment is given below to be described further to technical solution of the present invention, but it is worth noting that following
Embodiment should not be understood as limiting the scope of the invention, and the person skilled in the art in the field is according to the specific of foregoing invention
Content makees some nonessential modifications to the present invention and adjustment still falls within protection scope of the present invention.
Table 1: the component of gamma Rays protection composite material forms (in parts by weight) in embodiment 1-5
In the various embodiments described above, the modified by maleic acid anhydride graft LLDPE resin, the LLDPE resin being modified is selected
Melt index (MI) (MI): the resin between 0.25-4.00.It is modified using maleic anhydride as grafted monomers, with DCP (peroxidating diisopropyl
Benzene) it is initiator, the maleic anhydride that at a temperature of 180 DEG C prepared by fusion-grafting is grafted LLDPE resin, and maleic anhydride dosage is
5%, the DCP dosage of LLDPE is the 0.5% of LLDPE.
The preparation of gamma Rays protection composite material: it according to determining component proportion, is placed in after each component is mixed close
In mill, respectively at 160 DEG C；160℃；170℃；180℃；Mixing is melted at 180 DEG C to produce.
Table 2: the radiation protection performance and mechanical performance of gamma Rays protection composite material in embodiment 1-5
Remarks:
1. gamma Rays protective performance mass attentuation coefficient μm(g/cm2) test equipment be GEM/GMX HpGe γ energy
Spectrometer (domestic).
2. tensile strength, the test equipment of elongation at break are INSTRON-5567 universal testing machine (U.S.)；It draws
Stretch rate: 200mm/min.
3, mixing equipment is RC-90HAKKE rheometer (Germany).
Claims (7)
1. a kind of gamma Rays protect composite material, which is characterized in that the constituent component of composite material includes: in parts by weight
The modifying linear low-density polyethylene has following molecule through modified by maleic acid anhydride graft for linear low density polyethylene
The modifying linear low-density polyethylene of structure:
2. gamma Rays according to claim 1 protect composite material, which is characterized in that the low melting point bismuth alloy is
The bismuth alloy for being 100-120 DEG C by the melting temperature that bismuth, tin, lead and cadmium form.
3. gamma Rays according to claim 1 protect composite material, it is characterised in that the modified linear low density
Polyethylene are as follows: linear low density polyethylene is using maleic anhydride as grafted monomers, using cumyl peroxide as initiator, 180
The modifying linear low-density polyethylene that at a temperature of DEG C -190 DEG C prepared by fusion-grafting, the weight consumption of maleic anhydride are linear low close
The 3-5% of polyethylene is spent, the weight consumption of cumyl peroxide is the 0.3-0.6% of linear low density polyethylene.
4. gamma Rays according to claim 3 protect composite material, which is characterized in that the linear low density polyethylene
Alkene is linear low density polyethylene of the melt index (MI) between 0.25-4.00.
5. gamma Rays according to claim 1 protect composite material, which is characterized in that the rheology modifier is selected from
Fluororesin, polyethylene wax and microwax.
6. gamma Rays according to claim 1 protect composite material, which is characterized in that the antioxidant be 264 or/
With the antioxidant of 1010 trades mark.
7. the preparation method of the protection composite material of gamma Rays described in one of claim 1 to 6, it is characterised in that according to true
Fixed component proportion is placed in mixer after mixing each component, and melt blending is produced at 160-180 DEG C.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201811299881.6A CN109438897B (en) | 2018-11-02 | 2018-11-02 | Gamma-ray radiation protection composite material and preparation method thereof |
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| CN201811299881.6A CN109438897B (en) | 2018-11-02 | 2018-11-02 | Gamma-ray radiation protection composite material and preparation method thereof |
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| CN109438897A true CN109438897A (en) | 2019-03-08 |
| CN109438897B CN109438897B (en) | 2020-03-10 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112724487A (en) * | 2020-12-22 | 2021-04-30 | 武汉第二船舶设计研究所(中国船舶重工集团公司第七一九研究所) | High-temperature-resistant modified polyethylene-based shielding material and preparation method thereof |
| CN113930041A (en) * | 2021-11-12 | 2022-01-14 | 四川大学 | Polymer-based sound-absorbing material and preparation method thereof |
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| CN105778315A (en) * | 2015-12-15 | 2016-07-20 | 安徽瑞研新材料技术研究院有限公司 | Magnesium particle polyallylbenzene composite plastic |
| CN107501701A (en) * | 2017-08-15 | 2017-12-22 | 四川大学 | A kind of X-band microwave radiation shielding composite and preparation method thereof |
| CN107722425A (en) * | 2017-10-27 | 2018-02-23 | 镇江奥特氟科技有限公司 | A kind of composite particulate material and radiant panel of the radiation of high-intensity shielding neutron gamma |
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2018
- 2018-11-02 CN CN201811299881.6A patent/CN109438897B/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105778315A (en) * | 2015-12-15 | 2016-07-20 | 安徽瑞研新材料技术研究院有限公司 | Magnesium particle polyallylbenzene composite plastic |
| CN107501701A (en) * | 2017-08-15 | 2017-12-22 | 四川大学 | A kind of X-band microwave radiation shielding composite and preparation method thereof |
| CN107722425A (en) * | 2017-10-27 | 2018-02-23 | 镇江奥特氟科技有限公司 | A kind of composite particulate material and radiant panel of the radiation of high-intensity shielding neutron gamma |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112724487A (en) * | 2020-12-22 | 2021-04-30 | 武汉第二船舶设计研究所(中国船舶重工集团公司第七一九研究所) | High-temperature-resistant modified polyethylene-based shielding material and preparation method thereof |
| CN113930041A (en) * | 2021-11-12 | 2022-01-14 | 四川大学 | Polymer-based sound-absorbing material and preparation method thereof |
| CN113930041B (en) * | 2021-11-12 | 2022-06-17 | 四川大学 | Polymer-based sound-absorbing material and preparation method thereof |
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