WO2018049645A1 - Preparation method of latex gloves for neutron shielding and the gloves - Google Patents

Preparation method of latex gloves for neutron shielding and the gloves Download PDF

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Publication number
WO2018049645A1
WO2018049645A1 PCT/CN2016/099191 CN2016099191W WO2018049645A1 WO 2018049645 A1 WO2018049645 A1 WO 2018049645A1 CN 2016099191 W CN2016099191 W CN 2016099191W WO 2018049645 A1 WO2018049645 A1 WO 2018049645A1
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WO
WIPO (PCT)
Prior art keywords
latex
neutron shielding
gloves
rubber latex
dispersion
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PCT/CN2016/099191
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French (fr)
Inventor
Pengcheng Zhang
Duigong XU
Yichuan LIAO
Original Assignee
Institute Of Materials, China Academy Of Engineering Physics
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Application filed by Institute Of Materials, China Academy Of Engineering Physics filed Critical Institute Of Materials, China Academy Of Engineering Physics
Priority to PCT/CN2016/099191 priority Critical patent/WO2018049645A1/en
Publication of WO2018049645A1 publication Critical patent/WO2018049645A1/en

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Classifications

    • G—PHYSICS
    • G21—NUCLEAR PHYSICS; NUCLEAR ENGINEERING
    • G21F—PROTECTION AGAINST X-RADIATION, GAMMA RADIATION, CORPUSCULAR RADIATION OR PARTICLE BOMBARDMENT; TREATING RADIOACTIVELY CONTAMINATED MATERIAL; DECONTAMINATION ARRANGEMENTS THEREFOR
    • G21F3/00—Shielding characterised by its physical form, e.g. granules, or shape of the material
    • G21F3/02—Clothing
    • G21F3/035—Gloves
    • 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
    • C08K3/10—Metal compounds
    • C08K3/14—Carbides
    • 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
    • C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
    • C08K3/24—Acids; Salts thereof
    • 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
    • C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
    • C08K3/24—Acids; Salts thereof
    • C08K3/26—Carbonates; Bicarbonates
    • C08K2003/262—Alkali metal carbonates

Definitions

  • This invention relates to the field of preparation of protective articles, in particular to the field of radiation protection products, more particularly to Preparation method of Latex Gloves for Neutron Shielding and the Gloves.
  • the radioactive rays and their related radioactive nuclides have been widely applied in industry and medical treatment. Although the radioactive rays can bring great benefits to centuries, it may be harmful to human health if not be protected properly.
  • Neutron has a wide range of applications. Besides its high radiobiological effect and dose weighting factor, its neutron penetration ability is strong, and it is difficult to shield. In order to ensure the health and safety of handlers, and the application of radiation to be carried out smoothly, it must implement appropriate protection.
  • Thermal neutron absorption cross sections of lithium and boron is high.
  • Traditional structural materials containing lithium, lithium compounds, boron, boron compounds, have been widely used in Neutron Shielding.
  • 6061Al–B 4 C composite plates are used as a thermal neutron absorber for spent nuclear fuel pool storage rack. Concrete is generally used as shield material for construction design.
  • Some polymers materials with B4C are also used in Neutron Shielding, such as epoxy resins and high density polyethylene.
  • Neutron Shielding such as epoxy resins and high density polyethylene.
  • a flexible material to shield the neutrons such as protective shade, protective clothing, protective glove, protective helmet, etc.
  • the traditional structural materials, metal, Concrete and polymer sheet cannot meet the flexible requirements.
  • EPDM rubber with boric acid for Neutron Shielding is prepared by Mersin University. According to their results, the hardness is 45 HA. It is only suitable for using in a relatively hard situation.
  • Rubber latex is widely used in daily life as a traditional flexible material, and it can be modeled to an arbitrary shape with good plasticity and elasticity.
  • the object of this invention is to provide a Preparation method of Latex Gloves for Neutron Shielding and the Gloves.
  • the gloves can protect the hands of staff who engages in neutron related work.
  • the matrix of the article is latex.
  • the related Neutron Shielding gloves are prepared by dipping method. Other flexible articles used for Neutron Shielding also can be prepared by this method.
  • Neutron Shielding filler is pretreated by ball milling well mixed;
  • the mass ratio of Neutron Shielding filler, distilled water and dispersant is 1 : 1 ⁇ 2 : 0.001 ⁇ 0.05.
  • the dispersant is used to make the filler particles uniformly dispersed in the water, to form a stable suspension agentsuspension agent. Uniform and stable Neutron Shielding filler dispersion is got by Pretreatment.
  • the related Neutron Shielding filler comprises at least one of boron, boron compounds, lithium, lithium compounds.
  • the related dispersant comprises at least one of inorganic dispersion agent and organic dispersing agent.
  • the related dispersant may be inorganic dispersion agent and organic dispersing agent, one or some of them.
  • the compounding agents include vulcanizater, active agent, accelerator, reinforcing agent, antioxidant, and dispersant, with mass ratio of 1: 0.2 ⁇ 5 : 0.2 ⁇ 5 : 0 ⁇ 5 : 0 ⁇ 2 : 0.001 ⁇ 0.05;
  • the compounding agents are milled by ball milling well mixed;
  • the mass ratio of compounding agents and distilled water is 1 : 1 ⁇ 2; After milling, the compounding agent dispersion is obtained.
  • the related vulcanizater may be sulfur, selenium, tellurium, sulfur compounds, peroxides, quinone compounds, amine compounds, resin compounds, metal oxides and isocyanate, one or some of them.
  • the related active agent comprises at least one of norganic active agent and organic active agent. Active agent can improve the vulcanization of rubber latex.
  • the related accelerator comprises at least one of diphenylguanidine, zinc diethyl dithiocarbamate, tetramethyl thiuram monosulfide.
  • the related reinforcing agent comprises at least one of carbon black, white carbon black, titanium oxide, zinc oxide, clay, kaolin, graphite oxide and graphene.
  • the related antioxidant comprises at least one of N-Phenyl-2-naphthylamine, 4, 4-bis (alpha, alpha-dimethylbenzyl) diphenylamine, 1, 4-Bis (phenylamino) benzene, N- (1-Methylethyl) -N'-phenyl-4-benzenediamine, N-phenyl-N'-cyclohexyl-P-phenylenediamine.
  • Dipping latex consists of rubber latex, compounding agent dispersion, Neutron Shielding filler dispersion; The compounding agent dispersion and Neutron Shielding filler dispersion is added to rubber latex slowly with stirring; Then, KOH, thickener solution are mixed in the latex respectively.
  • the pH of the latex could be controlled by adjusting the contents of KOH.
  • the viscosity of the latex could be controlled by adjusting the contents of the added compounds. After filtrated, stewed and defoamed, the desired latex is gotten.
  • the dipping latex is divided into the following components according to the mass percentage: rubber latex 30 ⁇ 85%, vulcanizater 1 ⁇ 5%, active agent 0.2 ⁇ 5%, accelerator 0.2 ⁇ 5%, reinforcing agent 0 ⁇ 10%, antioxidant 0.01 ⁇ 1%, KOH 0.01 ⁇ 0.5%, thickener 0.01 ⁇ 0.5%, Neutron Shielding filler 10 ⁇ 68%.
  • the total mass percentage is 100%.
  • the related rubber latex is water-based latex
  • the related thickener comprises at least one of sodium alginate, sodium polyacrylate, casein, polyurethane, methylcellulose.
  • Neutron Shielding filler is pretreated by ball millingfor at least 12 h with 300 ⁇ 2000 rpm.
  • Inorganic dispersant may be silicate (e.g. water glass) and alkali metal phosphate (for example, sodium tripolyphosphate, six partial sodium phosphate and sodium pyrophosphate) .
  • Organic dispersant may be three ethyl hexyl phosphoric acid, sodium dodecyl sulfate, methyl amyl alcohol, cellulose derivatives, polyacrylamide, guar gum, fat acid polyethylene glycol ester silicate, and sodium dibutyl naphthalene sulfonate.
  • the compounding agents are milled by ball milling for at least 12 h with 300 ⁇ 2000 rpm.
  • Inorganic active agent comprises at least one of metal oxide, hydroxide and magnesium carbonate.
  • Organic active agent comprises at least one of fatty acids, amines, soaps and polyhydric alcohols and amino alcohols.
  • the rubber latex comprises at least one of natural rubber latex, latex neoprene, nitrile rubber latex, styrene butadiene rubber latex, polyurethane rubber latex, butadiene rubber latex, acrylate latex rubber, chlorinated polyethylene rubber latex, chlorosulfonated polyethylene rubber latex, one or some of them.
  • the desired latex is gotten, then:
  • the related coagulant is aqueous solution of CaCl 2 , BaCl 2 , Ca (NO 3 ) 2 , Ba (NO 3 ) 2 , one or some of them.
  • the coagulant also contains starch and thickener.
  • the solute mass fraction of coagulant is 0 ⁇ 60%.
  • the related Neutron Shielding gloves are prepared by foregoing method.
  • the thermal Neutron Shielding properties of film are tested using 49-2 swimming pool type reactor of Reactor Engineering Research and Design Institute of Chinese Atomic Energy Academy. During the test, the sample is 1600 mm from the thermal column. Three Dy-Al alloy foil detectors are placed on both sides of each sample. It needs to ensure that the position of six foil detectors on both sides of the sample cannot overlap. The lateral neutrons of thermal column are shielded by cadmium foil. Performances of Dy-Al alloy foil detectors are as follows. The diameter is 4 mm. The thickness is 0.3 mm. The weight percentage of Dy detector is 10.21%. The correction coefficient between the foil detectors is less than 1%. Dy detector is only very sensitive to thermal neutrons.
  • the activation cross section of neutron above thermal neutron is very small, and it can be ignored relative to thermal neutron activation cross section.
  • the activity of the foil detector after activated by neutron is proportional to the neutron fluence rate on the detector. After the activity is measured, the activity is normalized to the same time according to the radioactive decay formula, in order to accurately compare samples on both sides of the thermal neutron flux.
  • the normalization activity difference between the front Dy detector and the back Dy detector can reflect the thermal Neutron Shielding performance of the sample.
  • the radioactive decay formula is as follows:
  • a 0 is the normalization activity at initial time
  • A is the normalization activity at time t
  • T 1/2 is half-time.
  • the thermal Neutron Shielding performance of the sample can be calculated by the formula:
  • a front is the normalization activity of the front Dy detector at time t
  • a back is the normalization activity of the back Dy detector at time t.
  • Neutron Shielding gloves can be prepared by the method of the invention.
  • the gloves have good protective effect for neutron and the characteristics of flexible operation. In particular, they can meet the needs of thermal Neutron Shielding. They can provide good hands protection to staff who engages in thermal neutron related work .
  • the mechanical properties and thermal Neutron Shielding properties of the gloves is good enough for thermal Neutron Shielding.
  • the gloves have been applied in the field of thermal Neutron Shielding.
  • Neutron Shielding filler is pretreated by ball milling for 12 h with 300 rpm.
  • the mass of Neutron Shielding filler (B 4 C, boron carbide) , distilled water and dispersant (sodium dibutyl naphthalene sulfonate) is 10kg, 15kg, 20g, respectively.
  • the compounding agents include 2kg vulcanizater (S, sulfur) , 1kg active agent (ZnO, zinc oxide) , 0.5kg accelerator (ZDC, zinc diethyl dithiocarbamate) , 0.2kg antioxidant (D, N-Phenyl-2-naphthylamine) , 0.05kg dispersant (BX, sodium dibutyl naphthalene sulfonate) , and 4kg distilled water.
  • the compounding agents are milled by ball milling for 12 h with 300 rpm.
  • Dipping latex consisted of 100kg natural rubber latex, related compounding agent dispersion) , related Neutron Shielding filler dispersion.
  • the solid content of natural rubber latex is 60%.
  • the compounding agent dispersion) and Neutron Shielding filler dispersion is added to rubber latex slowly with stirring. Then, 1000g 5wt%KOH solution, 2000g 10wt%casein solution are mixed in the latex respectively.
  • the pH of the latex is 8.7.
  • the viscosity of the latex is 60mPa ⁇ s. After filtrated, stewed for 2 days and defoamed, the desired latex is gotten.
  • the related Neutron Shielding gloves are prepared by dipping method.
  • the properties of the Neutron Shielding gloves are measured.
  • the elongation at break is 810%, the tensile strength is 25 MPa, and the hardness is 26 HA.
  • the shielding efficiency for thermal neutron are 10%, 15%, 25%, 30%with gloves thickness of 0.3mm, 0.6mm, 1.0mm, 1.3 mm, respectively.
  • Neutron Shielding filler is pretreated by ball milling for 12 h with 300 rpm.
  • the mass of Neutron Shielding filler (B 4 C, boron carbide) , distilled water and dispersant (sodium dibutyl naphthalene sulfonate) is 12kg, 18kg, 40g, respectively.
  • the compounding agents include 2.2kg vulcanizater (S, sulfur) , 1kg active agent (ZnO, zinc oxide) , 0.8kg accelerator (ZDC, zinc diethyl dithiocarbamate) , 0.2kg antioxidant (D, N-Phenyl-2-naphthylamine) , 0.05kg dispersant (BX, sodium dibutyl naphthalene sulfonate) , and 6kg distilled water.
  • the compounding agents are milled by ball milling for 12 h with 300 rpm.
  • Dipping latex consisted of 100kg natural rubber latex, related compounding agent dispersion) , related Neutron Shielding filler dispersion.
  • the solid content of natural rubber latex is 60%.
  • the compounding agent dispersion) and Neutron Shielding filler dispersion is added to rubber latex slowly with stirring. Then, 1000g 5wt%KOH solution, 2500g 10wt%casein solution are mixed in the latex respectively.
  • the pH of the latex is 8.6.
  • the viscosity of the latex is 65mPa ⁇ s. After filtrated, stewed for 2 days and defoamed, the desired latex is gotten.
  • the related Neutron Shielding gloves are prepared by dipping method.
  • the properties of the Neutron Shielding gloves are measured.
  • the elongation at break is 800%, the tensile strength is 29 MPa, and the hardness is 27 HA.
  • the shielding efficiency for thermal neutron are 12%, 17%, 26%, 33%with gloves thickness of 0.3mm, 0.5mm, 0.8mm, 1.2 mm, respectively.
  • Neutron Shielding filler is pretreated by ball milling for 12 h with 300 rpm.
  • the mass of Neutron Shielding filler (B 4 C, boron carbide) , distilled water and dispersant (sodium dibutyl naphthalene sulfonate) is 22kg, 35kg, 50g, respectively.
  • the compounding agents include 2.2kg vulcanizater (S, sulfur) , 1kg active agent (ZnO, zinc oxide) , 0.5kg accelerator (ZDC, zinc diethyl dithiocarbamate) , 0.2kg antioxidant (D, N-Phenyl-2-naphthylamine) , 0.07kg dispersant (BX, sodium dibutyl naphthalene sulfonate) , and 4.5kg distilled water.
  • the compounding agents are milled by ball milling for 12 h with 300 rpm.
  • Dipping latex consisted of 100kg natural rubber latex, related compounding agent dispersion) , related Neutron Shielding filler dispersion.
  • the solid content of natural rubber latex is 60%.
  • the compounding agent dispersion) and Neutron Shielding filler dispersion is added to rubber latex slowly with stirring. Then, 1100g 5wt%KOH solution, 2300g 10wt%casein solution are mixed in the latex respectively.
  • the pH of the latex is 8.6.
  • the viscosity of the latex is 62mPa ⁇ s. After filtrated, stewed for 2 days and defoamed, the desired latex is gotten.
  • the related Neutron Shielding gloves are prepared by dipping method.
  • the properties of the Neutron Shielding gloves are measured.
  • the elongation at break is 780%, the tensile strength is 23 MPa, and the hardness is 29 HA.
  • the shielding efficiency for thermal neutron are 15%, 24%, 33%, 40%with gloves thickness of 0.3mm, 0.6mm, 0.9mm, 1.2 mm, respectively.
  • Neutron Shielding filler is pretreated by ball milling for 24 h with 300 rpm.
  • the mass of Neutron Shielding filler (B 4 C, boron carbide) , distilled water and dispersant (sodium dibutyl naphthalene sulfonate) is 35kg, 50kg, 30g, respectively.
  • the compounding agents include 1kg vulcanizater (S, sulfur) , 3kg active agent (ZnO, zinc oxide) , 4kg accelerator (ZDC, zinc diethyl dithiocarbamate) , 4kg reinforcing agent (carbon black) , 0.03kg dispersant (BX, sodium dibutyl naphthalene sulfonate) , and 21kg distilled water.
  • S sulfur
  • ZnO zinc oxide
  • ZDC zinc diethyl dithiocarbamate
  • BX sodium dibutyl naphthalene sulfonate
  • Dipping latex consisted of 100kg butadiene-acrylonitrile rubber latex, related compounding agent dispersion) , related Neutron Shielding filler dispersion.
  • the solid content of butadiene-acrylonitrile rubber latex is 45%.
  • the compounding agent dispersion) and Neutron Shielding filler dispersion is added to rubber latex slowly with stirring. Then, 1000g 5wt%KOH solution, 4000g 10wt%casein solution are mixed in the latex respectively.
  • the pH of the latex is 8.3.
  • the viscosity of the latex is 55mPa ⁇ s. After filtrated, stewed for 3 days and defoamed, the desired latex is gotten.
  • the related Neutron Shielding gloves are prepared by dipping method.
  • the properties of the Neutron Shielding gloves are measured.
  • the elongation at break is 500%, the tensile strength is 30 MPa, and the hardness is 35 HA.
  • the shielding efficiency for thermal neutron are 16%, 25%, 36%, 45%with gloves thickness of 0.2mm, 0.5mm, 0.8mm, 1.0mm, respectively.
  • Neutron Shielding filler is pretreated by ball milling for 24 h with 300 rpm.
  • the mass of Neutron Shielding filler Li 2 CO 3 , lithium carbonate
  • distilled water and dispersant (sodium dibutyl naphthalene sulfonate) is 30kg, 45kg, 40g, respectively.
  • the compounding agents include 1.5kg vulcanizater (S, sulfur) , 2kg active agent (ZnO, zinc oxide) , 4kg accelerator (TMTM, tetramethyl thiuram monosulfide) , 3kg reinforcing agent (carbon black) , 0.03kg dispersant (BX, sodium dibutyl naphthalene sulfonate) , and 18kg distilled water.
  • S sulfur
  • active agent ZnO, zinc oxide
  • TMTM tetramethyl thiuram monosulfide
  • BX sodium dibutyl naphthalene sulfonate
  • BX sodium dibutyl naphthalene sulfonate
  • Dipping latex consisted of 100kg chloroprene rubber latex, related compounding agent dispersion) , related Neutron Shielding filler dispersion.
  • the solid content of chloroprene rubber latex is 50%.
  • the compounding agent dispersion) and Neutron Shielding filler dispersion is added to rubber latex slowly with stirring. Then, 1000g 5wt%KOH solution, 3000g 2wt%sodium polyacrylate solution are mixed in the latex respectively.
  • the pH of the latex is 8.
  • the viscosity of the latex is 67mPa ⁇ s. After filtrated, stewed for 3 days and defoamed, the desired latex is gotten.
  • the related Neutron Shielding gloves are prepared by dipping method.
  • the properties of the Neutron Shielding gloves are measured.
  • the elongation at break is 600%, the tensile strength is 24 MPa, and the hardness is 38 HA.
  • the shielding efficiency for thermal neutron are 20%, 30%, 43%, 52%with gloves thickness of 0.2mm, 0.5mm, 0.8mm, 1.0mm, respectively.
  • the invention is not limited to the specific implementation methods mentioned above.
  • the present invention extends to any new features or any new combination disclosed in this specification, as well as any new method or procedure of disclosure or any new combination.
  • Neutron Shielding filler is pretreated by ball milling for 12 h with 300 rpm.
  • the mass of Neutron Shielding filler (B 4 C, boron carbide) , distilled water and dispersant (sodium dibutyl naphthalene sulfonate) is 60kg, 90kg, 100g, respectively.
  • the compounding agents include 2.2kg vulcanizater (S, sulfur) , 1kg active agent (ZnO, zinc oxide) , 0.5kg accelerator (ZDC, zinc diethyl dithiocarbamate) , 0.2kg antioxidant (D, N-Phenyl-2-naphthylamine) , 0.07kg dispersant (BX, sodium dibutyl naphthalene sulfonate) , and 4.5kg distilled water.
  • the compounding agents are milled by ball milling for 12 h with 300 rpm.
  • Dipping latex consisted of 100kg natural rubber latex, related compounding agent dispersion) , related Neutron Shielding filler dispersion.
  • the solid content of natural rubber latex is 60%.
  • the compounding agent dispersion) and Neutron Shielding filler dispersion is added to rubber latex slowly with stirring. Then, 1200g 5wt%KOH solution, 2500g 10wt%casein solution are mixed in the latex respectively.
  • the pH of the latex is 8.6.
  • the viscosity of the latex is 64mPa ⁇ s. After filtrated, stewed for 2 days and defoamed, the desired latex is gotten.
  • the related Neutron Shielding gloves are prepared by dipping method.
  • the properties of the Neutron Shielding gloves are measured.
  • the elongation at break is 680%, the tensile strength is 18 MPa, and the hardness is 39 HA.
  • the shielding efficiency for thermal neutron are 35%, 49%, 60%, 70%with gloves thickness of 0.3mm, 0.6mm, 0.9mm, 1.2 mm, respectively.

Abstract

A preparation method of Latex Gloves for Neutron Shielding and the Gloves, the related Neutron Shielding gloves are prepared by dipping method. The dipping latex consists of rubber latex, compounding agent dispersion, Neutron Shielding filler dispersion. The compounding agents include vulcanizater, active agent, accelerator, reinforcing agent, antioxidant, and dispersant, with mass ratio of 1: 0.2～5 : 0.2～5 : 0～5 : 0～2 : 0.001～0.05. The Neutron Shielding filler dispersion consists of Neutron Shielding filler, distilled water and dispersant, with mass ratio of 1 : 1～2 : 0.001～0.05.

Description

Preparation method of Latex Gloves for Neutron Shielding and the Gloves FIELD
This invention relates to the field of preparation of protective articles, in particular to the field of radiation protection products, more particularly to Preparation method of Latex Gloves for Neutron Shielding and the Gloves.
BACKGROUND
The radioactive rays and their related radioactive nuclides have been widely applied in industry and medical treatment. Although the radioactive rays can bring great benefits to mankind, it may be harmful to human health if not be protected properly.
Neutron has a wide range of applications. Besides its high radiobiological effect and dose weighting factor, its neutron penetration ability is strong, and it is difficult to shield. In order to ensure the health and safety of handlers, and the application of radiation to be carried out smoothly, it must implement appropriate protection.
To avoid the radiation harm of thermal neutron, low Z elements are commonly used in Neutron Shielding. Thermal neutron absorption cross sections of lithium and boron is high. Traditional structural materials containing lithium, lithium compounds, boron, boron compounds, have been widely used in Neutron Shielding. For example, 6061Al–B4C composite plates are used as a thermal neutron absorber for spent nuclear fuel pool storage rack. Concrete is generally used as shield material for construction design.
Some polymers materials with B4C are also used in Neutron Shielding, such as epoxy resins and high density polyethylene. There are some situations which need to use a flexible material to shield the neutrons, such as protective shade, protective clothing, protective glove, protective helmet, etc. However, the traditional structural materials, metal, Concrete and polymer sheet, cannot meet the flexible requirements.
Flexible flame-retardant composites using high-functional methyl vinyl silicone rubber matrix with B4C as neutron absorber and zinc borate as flame retardant. Its elongation at break is up to 800％, but its tensile strength is only 0.5 MPa which is not strong enough.
EPDM rubber with boric acid for Neutron Shielding is prepared by Mersin University. According to their results, the hardness is 45 HA. It is only suitable for using in a relatively hard situation.
S.E. Gawkily prepared B4C/NR composites as thermal neutron radiation shields. The original samples are of 2, 3, 6 and 9 mm. The highest value obtained for the linear absorption coefficient is 0.34 cm-1 for the composite containing 20％B4C. They did not provide the shielding efficiency, as well as the mechanical properties of the composite. Their preparation raw materials and methods are aimed at solid rubber. There are great differences between solid rubber and rubber latex, such as preparation method, products properties, products form and so on.
Although there are some researches of protective materials based on polymer, so far, there is no report on the material used for personal flexible protection. Rubber latex is widely used in daily life as a traditional flexible material, and it can be modeled to an arbitrary shape with good plasticity and elasticity.
SUMMARY
The object of this invention is to provide a Preparation method of Latex Gloves for Neutron Shielding and the Gloves. The gloves can protect the hands of staff who engages in neutron related work. The matrix of the article is latex. The related Neutron Shielding gloves are prepared by dipping method. Other flexible articles used for Neutron Shielding also can be prepared by this method.
Preparation method of Latex Gloves for Neutron Shielding, comprising the steps of:
(1) Pretreatment of Neutron Shielding filler
Neutron Shielding filler is pretreated by ball milling well mixed； The mass ratio of Neutron Shielding filler, distilled water and dispersant is 1 : 1～2 : 0.001～0.05.
The dispersant is used to make the filler particles uniformly dispersed in the water, to form a stable suspension agentsuspension agent. Uniform and stable Neutron Shielding filler dispersion is got by Pretreatment.
The related Neutron Shielding filler comprises at least one of boron, boron compounds, lithium, lithium compounds.
The related dispersant comprises at least one of inorganic dispersion agent and organic dispersing agent. In other words, the related dispersant may be inorganic dispersion agent and organic dispersing agent, one or some of them.
(2) Preparation of compounding agent dispersion.
The compounding agents include vulcanizater, active agent, accelerator, reinforcing agent,  antioxidant, and dispersant, with mass ratio of 1: 0.2～5 : 0.2～5 : 0～5 : 0～2 : 0.001～0.05； The compounding agents are milled by ball milling well mixed； The mass ratio of compounding agents and distilled water is 1 : 1～2； After milling, the compounding agent dispersion is obtained.
The related vulcanizater may be sulfur, selenium, tellurium, sulfur compounds, peroxides, quinone compounds, amine compounds, resin compounds, metal oxides and isocyanate, one or some of them.
The related active agent comprises at least one of norganic active agent and organic active agent. Active agent can improve the vulcanization of rubber latex.
The related accelerator comprises at least one of diphenylguanidine, zinc diethyl dithiocarbamate, tetramethyl thiuram monosulfide.
The related reinforcing agent comprises at least one of carbon black, white carbon black, titanium oxide, zinc oxide, clay, kaolin, graphite oxide and graphene.
The related antioxidant comprises at least one of N-Phenyl-2-naphthylamine, 4, 4-bis (alpha, alpha-dimethylbenzyl) diphenylamine, 1, 4-Bis (phenylamino) benzene, N- (1-Methylethyl) -N'-phenyl-4-benzenediamine, N-phenyl-N'-cyclohexyl-P-phenylenediamine.
(3) Preparation of latex used for dipping
Dipping latex consists of rubber latex, compounding agent dispersion, Neutron Shielding filler dispersion； The compounding agent dispersion and Neutron Shielding filler dispersion is added to rubber latex slowly with stirring； Then, KOH, thickener solution are mixed in the latex respectively. The pH of the latex could be controlled by adjusting the contents of KOH. The viscosity of the latex could be controlled by adjusting the contents of the added compounds. After filtrated, stewed and defoamed, the desired latex is gotten.
In the dry weight, the dipping latex is divided into the following components according to the mass percentage: rubber latex 30～85％, vulcanizater 1～5％, active agent 0.2～5％, accelerator 0.2～5％, reinforcing agent 0～10％, antioxidant 0.01～1％, KOH 0.01～0.5％, thickener 0.01～0.5％, Neutron Shielding filler 10～68％. The total mass percentage is 100％.
The related rubber latex is water-based latex；
The related thickener comprises at least one of sodium alginate, sodium polyacrylate, casein, polyurethane, methylcellulose.
In the step (1) , Neutron Shielding filler is pretreated by ball millingfor at least 12 h with 300 ～2000 rpm.
In the step (1) , Inorganic dispersant may be silicate (e.g. water glass) and alkali metal phosphate (for example, sodium tripolyphosphate, six partial sodium phosphate and sodium pyrophosphate) . Organic dispersant may be three ethyl hexyl phosphoric acid, sodium dodecyl sulfate, methyl amyl alcohol, cellulose derivatives, polyacrylamide, guar gum, fat acid polyethylene glycol ester silicate, and sodium dibutyl naphthalene sulfonate.
In the step (2) , The compounding agents are milled by ball milling for at least 12 h with 300～2000 rpm.
In the step (2) , Inorganic active agent comprises at least one of metal oxide, hydroxide and magnesium carbonate. Organic active agent comprises at least one of fatty acids, amines, soaps and polyhydric alcohols and amino alcohols.
In the step (3) , The rubber latex comprises at least one of natural rubber latex, latex neoprene, nitrile rubber latex, styrene butadiene rubber latex, polyurethane rubber latex, butadiene rubber latex, acrylate latex rubber, chlorinated polyethylene rubber latex, chlorosulfonated polyethylene rubber latex, one or some of them.
The desired latex is gotten, then:
(a) Soak the glove mold in coagulant after the mold is cleaned, then dry it；
(b) Dip the related mold in the related latex for 5s～10min, then dry it；
(c) Roll edge, cure, unload mold, wash gloves, dry gloves, that is the related Neutron Shielding gloves.
The related coagulant is aqueous solution of CaCl2, BaCl2, Ca (NO3) 2, Ba (NO3) 2, one or some of them. The coagulant also contains starch and thickener. The solute mass fraction of coagulant is 0 ～ 60％.
The related Neutron Shielding gloves are prepared by foregoing method.
Mechanical properties (tensile strength and elongation at break) of the Neutron Shielding gloves are tested with universal testing machine at room temperature. The hardness of film was measured by shore durometer at room temperature.
The thermal Neutron Shielding properties of film are tested using 49-2 swimming pool type reactor of Reactor Engineering Research and Design Institute of Chinese Atomic Energy Academy. During the test, the sample is 1600 mm from the thermal column. Three Dy-Al alloy foil detectors are placed on both sides of each sample. It needs to ensure that the position of six  foil detectors on both sides of the sample cannot overlap. The lateral neutrons of thermal column are shielded by cadmium foil. Performances of Dy-Al alloy foil detectors are as follows. The diameter is 4 mm. The thickness is 0.3 mm. The weight percentage of Dy detector is 10.21％. The correction coefficient between the foil detectors is less than 1％. Dy detector is only very sensitive to thermal neutrons. The activation cross section of neutron above thermal neutron is very small, and it can be ignored relative to thermal neutron activation cross section. The activity of the foil detector after activated by neutron is proportional to the neutron fluence rate on the detector. After the activity is measured, the activity is normalized to the same time according to the radioactive decay formula, in order to accurately compare samples on both sides of the thermal neutron flux. The normalization activity difference between the front Dy detector and the back Dy detector can reflect the thermal Neutron Shielding performance of the sample.
The radioactive decay formula is as follows:
Figure PCTCN2016099191-appb-000001
In which, A0 is the normalization activity at initial time, A is the normalization activity at time t；T1/2 is half-time.
The thermal Neutron Shielding performance of the sample can be calculated by the formula:
Shielding efficiency ＝ (Afront -Aback) /Afront×100％       (2)
In which, Afront is the normalization activity of the front Dy detector at time t, Aback is the normalization activity of the back Dy detector at time t.
In summary, Neutron Shielding gloves can be prepared by the method of the invention. The gloves have good protective effect for neutron and the characteristics of flexible operation. In particular, they can meet the needs of thermal Neutron Shielding. They can provide good hands protection to staff who engages in thermal neutron related work .
According this invention, the mechanical properties and thermal Neutron Shielding properties of the gloves is good enough for thermal Neutron Shielding. The gloves have been applied in the field of thermal Neutron Shielding.
Detailed description
In accordance with the teaching of the present invention, All of the features, methods, steps disclosed in this specification, can be combined in any way, unless the features and /or steps that are mutually exclusive.
The any feature disclosed in this specification, unless specially described may be replaced by other substitution equivalent or similar to the purpose of the feature. Namely, unless otherwise stated, each feature is just an example of a series of equivalent or similar features.
EXAMPLE 1
The steps in the preparation of Neutron Shielding gloves with natural rubber latex as matrix are as follows.
1. Preparation of Neutron Shielding filler dispersion.
Neutron Shielding filler is pretreated by ball milling for 12 h with 300 rpm. The mass of Neutron Shielding filler (B4C, boron carbide) , distilled water and dispersant (sodium dibutyl naphthalene sulfonate) is 10kg, 15kg, 20g, respectively.
2. Preparation of compounding agent dispersion.
The compounding agents include 2kg vulcanizater (S, sulfur) , 1kg active agent (ZnO, zinc oxide) , 0.5kg accelerator (ZDC, zinc diethyl dithiocarbamate) , 0.2kg antioxidant (D, N-Phenyl-2-naphthylamine) , 0.05kg dispersant (BX, sodium dibutyl naphthalene sulfonate) , and 4kg distilled water. The compounding agents are milled by ball milling for 12 h with 300 rpm.
3. Preparation of latex used for dipping
Dipping latex consisted of 100kg natural rubber latex, related compounding agent dispersion) , related Neutron Shielding filler dispersion. The solid content of natural rubber latex is 60％. The compounding agent dispersion) and Neutron Shielding filler dispersion is added to rubber latex slowly with stirring. Then, 1000g 5wt％KOH solution, 2000g 10wt％casein solution are mixed in the latex respectively. The pH of the latex is 8.7. The viscosity of the latex is 60mPa·s. After filtrated, stewed for 2 days and defoamed, the desired latex is gotten.
4. The related Neutron Shielding gloves are prepared by dipping method.
a. Soak the glove mold in coagulant of 5wt％CaCl2 solution after the mold is cleaned, then dry it.
b. Dip the related mold in the related latex for 20s, then dry it. Repeat this step for 1～10 times.
c. Roll edge, cure in boiling water for 60min, unload mold, wash gloves, dry gloves below 100℃, that is the related Neutron Shielding gloves.
The properties of the Neutron Shielding gloves are measured. The elongation at break is 810％, the tensile strength is 25 MPa, and the hardness is 26 HA. The shielding efficiency for  thermal neutron are 10％, 15％, 25％, 30％with gloves thickness of 0.3mm, 0.6mm, 1.0mm, 1.3 mm, respectively.
EXAMPLE 2
The steps in the preparation of Neutron Shielding gloves with natural rubber latex as matrix are as follows.
Neutron Shielding filler is pretreated by ball milling for 12 h with 300 rpm. The mass of Neutron Shielding filler (B4C, boron carbide) , distilled water and dispersant (sodium dibutyl naphthalene sulfonate) is 12kg, 18kg, 40g, respectively.
2. Preparation of compounding agent dispersion.
The compounding agents include 2.2kg vulcanizater (S, sulfur) , 1kg active agent (ZnO, zinc oxide) , 0.8kg accelerator (ZDC, zinc diethyl dithiocarbamate) , 0.2kg antioxidant (D, N-Phenyl-2-naphthylamine) , 0.05kg dispersant (BX, sodium dibutyl naphthalene sulfonate) , and 6kg distilled water. The compounding agents are milled by ball milling for 12 h with 300 rpm.
3. Preparation of latex used for dipping
Dipping latex consisted of 100kg natural rubber latex, related compounding agent dispersion) , related Neutron Shielding filler dispersion. The solid content of natural rubber latex is 60％. The compounding agent dispersion) and Neutron Shielding filler dispersion is added to rubber latex slowly with stirring. Then, 1000g 5wt％KOH solution, 2500g 10wt％casein solution are mixed in the latex respectively. The pH of the latex is 8.6. The viscosity of the latex is 65mPa·s. After filtrated, stewed for 2 days and defoamed, the desired latex is gotten.
4. The related Neutron Shielding gloves are prepared by dipping method.
a. Soak the glove mold in coagulant of 10wt％BaCl2 solution after the mold is cleaned, then dry it.
b. Dip the related mold in the related latex for 10s, then dry it. Repeat this step for 1～10 times.
c. Roll edge, cure in boiling water for 60min, unload mold, wash gloves, dry gloves below 100℃, that is the related Neutron Shielding gloves.
The properties of the Neutron Shielding gloves are measured. The elongation at break is 800％, the tensile strength is 29 MPa, and the hardness is 27 HA. The shielding efficiency for thermal neutron are 12％, 17％, 26％, 33％with gloves thickness of 0.3mm, 0.5mm, 0.8mm, 1.2 mm, respectively.
EXAMPLE 3
The steps in the preparation of Neutron Shielding gloves with natural rubber latex as matrix are as follows.
1. Preparation of Neutron Shielding filler dispersion.
Neutron Shielding filler is pretreated by ball milling for 12 h with 300 rpm. The mass of Neutron Shielding filler (B4C, boron carbide) , distilled water and dispersant (sodium dibutyl naphthalene sulfonate) is 22kg, 35kg, 50g, respectively.
2. Preparation of compounding agent dispersion.
The compounding agents include 2.2kg vulcanizater (S, sulfur) , 1kg active agent (ZnO, zinc oxide) , 0.5kg accelerator (ZDC, zinc diethyl dithiocarbamate) , 0.2kg antioxidant (D, N-Phenyl-2-naphthylamine) , 0.07kg dispersant (BX, sodium dibutyl naphthalene sulfonate) , and 4.5kg distilled water. The compounding agents are milled by ball milling for 12 h with 300 rpm.
3. Preparation of latex used for dipping
Dipping latex consisted of 100kg natural rubber latex, related compounding agent dispersion) , related Neutron Shielding filler dispersion. The solid content of natural rubber latex is 60％. The compounding agent dispersion) and Neutron Shielding filler dispersion is added to rubber latex slowly with stirring. Then, 1100g 5wt％KOH solution, 2300g 10wt％casein solution are mixed in the latex respectively. The pH of the latex is 8.6. The viscosity of the latex is 62mPa·s. After filtrated, stewed for 2 days and defoamed, the desired latex is gotten.
4. The related Neutron Shielding gloves are prepared by dipping method.
a. Soak the glove mold in coagulant of 10wt％BaCl2 solution after the mold is cleaned, then dry it.
b. Dip the related mold in the related latex for 30s, then dry it. Repeat this step for 1～10 times.
c. Roll edge, cure in boiling water for 60min, unload mold, wash gloves, dry gloves below 100℃, that is the related Neutron Shielding gloves.
The properties of the Neutron Shielding gloves are measured. The elongation at break is 780％, the tensile strength is 23 MPa, and the hardness is 29 HA. The shielding efficiency for thermal neutron are 15％, 24％, 33％, 40％with gloves thickness of 0.3mm, 0.6mm, 0.9mm, 1.2 mm, respectively.
EXAMPLE 4
The steps in the preparation of Neutron Shielding gloves with butadiene-acrylonitrile rubber latex as matrix are as follows.
1. Preparation of Neutron Shielding filler dispersion.
Neutron Shielding filler is pretreated by ball milling for 24 h with 300 rpm. The mass of Neutron Shielding filler (B4C, boron carbide) , distilled water and dispersant (sodium dibutyl naphthalene sulfonate) is 35kg, 50kg, 30g, respectively.
2. Preparation of compounding agent dispersion.
The compounding agents include 1kg vulcanizater (S, sulfur) , 3kg active agent (ZnO, zinc oxide) , 4kg accelerator (ZDC, zinc diethyl dithiocarbamate) , 4kg reinforcing agent (carbon black) , 0.03kg dispersant (BX, sodium dibutyl naphthalene sulfonate) , and 21kg distilled water. The compounding agents are milled by ball milling for 72 h with 300 rpm.
3. Preparation of latex used for dipping
Dipping latex consisted of 100kg butadiene-acrylonitrile rubber latex, related compounding agent dispersion) , related Neutron Shielding filler dispersion. The solid content of butadiene-acrylonitrile rubber latex is 45％. The compounding agent dispersion) and Neutron Shielding filler dispersion is added to rubber latex slowly with stirring. Then, 1000g 5wt％KOH solution, 4000g 10wt％casein solution are mixed in the latex respectively. The pH of the latex is 8.3. The viscosity of the latex is 55mPa·s. After filtrated, stewed for 3 days and defoamed, the desired latex is gotten.
4. The related Neutron Shielding gloves are prepared by dipping method.
a. Soak the glove mold in coagulant of 3wt％BaCl2 solution after the mold is cleaned, then dry it.
b. Dip the related mold in the related latex for 1min, then dry it. Repeat this step for 1～10 times.
c. Roll edge, cure in hot steam for 80min, unload mold, wash gloves, dry gloves below 70℃, that is the related Neutron Shielding gloves.
The properties of the Neutron Shielding gloves are measured. The elongation at break is 500％, the tensile strength is 30 MPa, and the hardness is 35 HA. The shielding efficiency for thermal neutron are 16％, 25％, 36％, 45％with gloves thickness of 0.2mm, 0.5mm, 0.8mm, 1.0mm, respectively.
EXAMPLE 5
The steps in the preparation of Neutron Shielding gloves with chloroprene rubber latex as matrix are as follows.
1. Preparation of Neutron Shielding filler dispersion.
Neutron Shielding filler is pretreated by ball milling for 24 h with 300 rpm. The mass of Neutron Shielding filler (Li2CO3, lithium carbonate) , distilled water and dispersant (sodium dibutyl naphthalene sulfonate) is 30kg, 45kg, 40g, respectively.
2. Preparation of compounding agent dispersion.
The compounding agents include 1.5kg vulcanizater (S, sulfur) , 2kg active agent (ZnO, zinc oxide) , 4kg accelerator (TMTM, tetramethyl thiuram monosulfide) , 3kg reinforcing agent (carbon black) , 0.03kg dispersant (BX, sodium dibutyl naphthalene sulfonate) , and 18kg distilled water. The compounding agents are milled by ball milling for 72 h with 300 rpm.
3. Preparation of latex used for dipping
Dipping latex consisted of 100kg chloroprene rubber latex, related compounding agent dispersion) , related Neutron Shielding filler dispersion. The solid content of chloroprene rubber latex is 50％. The compounding agent dispersion) and Neutron Shielding filler dispersion is added to rubber latex slowly with stirring. Then, 1000g 5wt％KOH solution, 3000g 2wt％sodium polyacrylate solution are mixed in the latex respectively. The pH of the latex is 8. The viscosity of the latex is 67mPa·s. After filtrated, stewed for 3 days and defoamed, the desired latex is gotten.
4. The related Neutron Shielding gloves are prepared by dipping method.
a.Soak the glove mold in coagulant of 15wt％BaCl2 solution after the mold is cleaned, then dry it.
b. Dip the related mold in the related latex for 1min, then dry it. Repeat this step for 1～10 times.
c. Roll edge, cure in hot air for 80min, unload mold, wash gloves, dry gloves below 80℃, that is the related Neutron Shielding gloves.
The properties of the Neutron Shielding gloves are measured. The elongation at break is 600％, the tensile strength is 24 MPa, and the hardness is 38 HA. The shielding efficiency for thermal neutron are 20％, 30％, 43％, 52％with gloves thickness of 0.2mm, 0.5mm, 0.8mm, 1.0mm, respectively.
The invention is not limited to the specific implementation methods mentioned above. The present invention extends to any new features or any new combination disclosed in this  specification, as well as any new method or procedure of disclosure or any new combination.
EXAMPLE 6
The steps in the preparation of Neutron Shielding gloves with natural rubber latex as matrix are as follows.
1. Preparation of Neutron Shielding filler dispersion.
Neutron Shielding filler is pretreated by ball milling for 12 h with 300 rpm. The mass of Neutron Shielding filler (B4C, boron carbide) , distilled water and dispersant (sodium dibutyl naphthalene sulfonate) is 60kg, 90kg, 100g, respectively.
2. Preparation of compounding agent dispersion.
The compounding agents include 2.2kg vulcanizater (S, sulfur) , 1kg active agent (ZnO, zinc oxide) , 0.5kg accelerator (ZDC, zinc diethyl dithiocarbamate) , 0.2kg antioxidant (D, N-Phenyl-2-naphthylamine) , 0.07kg dispersant (BX, sodium dibutyl naphthalene sulfonate) , and 4.5kg distilled water. The compounding agents are milled by ball milling for 12 h with 300 rpm.
3. Preparation of latex used for dipping
Dipping latex consisted of 100kg natural rubber latex, related compounding agent dispersion) , related Neutron Shielding filler dispersion. The solid content of natural rubber latex is 60％. The compounding agent dispersion) and Neutron Shielding filler dispersion is added to rubber latex slowly with stirring. Then, 1200g 5wt％KOH solution, 2500g 10wt％casein solution are mixed in the latex respectively. The pH of the latex is 8.6. The viscosity of the latex is 64mPa·s. After filtrated, stewed for 2 days and defoamed, the desired latex is gotten.
4. The related Neutron Shielding gloves are prepared by dipping method.
a. Soak the glove mold in coagulant of 15wt％BaCl2 solution after the mold is cleaned, then dry it.
b. Dip the related mold in the related latex for 30s, then dry it. Repeat this step for 1～10 times.
c. Roll edge, cure in boiling water for 60min, unload mold, wash gloves, dry gloves below 100℃, that is the related Neutron Shielding gloves.
The properties of the Neutron Shielding gloves are measured. The elongation at break is 680％, the tensile strength is 18 MPa, and the hardness is 39 HA. The shielding efficiency for thermal neutron are 35％, 49％, 60％, 70％with gloves thickness of 0.3mm, 0.6mm, 0.9mm, 1.2 mm, respectively.

Claims (9)

  1. Preparation method of Latex Gloves for Neutron Shielding, comprising the steps of:
    (1) Pretreatment of Neutron Shielding filler
    Neutron Shielding filler is pretreated by ball milling well mixed； The mass ratio of Neutron Shielding filler, distilled water and dispersant is 1 : 1～2 : 0.001～0.05；
    The related Neutron Shielding filler comprises at least one of boron, boron compounds, lithium, lithium compounds；
    The related dispersant comprises at least one of inorganic dispersion agent and organic dispersing agent；
    (2) Preparation of compounding agent dispersion
    The compounding agents include vulcanizater, active agent, accelerator, reinforcing agent, antioxidant, and dispersant, with mass ratio of 1: 0.2～5 : 0.2～5 : 0～5 : 0～2 : 0.001～0.05； The compounding agents are milled by ball milling well mixed； The mass ratio of compounding agents and distilled water is 1 : 1～2； After milling, the compounding agent dispersion is obtained；
    The related vulcanizater may be sulfur, selenium, tellurium, sulfur compounds, peroxides, quinone compounds, amine compounds, resin compounds, metal oxides and isocyanate, one or some of them；
    The related active agent comprises at least one of norganic active agent and organic active agent；
    The related accelerator comprises at least one of diphenylguanidine, zinc diethyl dithiocarbamate, tetramethyl thiuram monosulfide；
    The related reinforcing agent comprises at least one of carbon black, white carbon black, titanium oxide, zinc oxide, clay, kaolin, graphite oxide and graphene；
    The related antioxidant comprises at least one of N-Phenyl-2-naphthylamine, 4, 4-bis (alpha, alpha-dimethylbenzyl) diphenylamine, 1, 4-Bis (phenylamino) benzene, N- (1-Methylethyl) -N'-phenyl-4-benzenediamine, N-phenyl-N'-cyclohexyl-P-phenylenediamine；
    (3) Preparation of latex used for dipping
    Dipping latex consists of rubber latex, compounding agent dispersion, Neutron Shielding filler dispersion； The compounding agent dispersion and Neutron Shielding filler dispersion is added to rubber latex slowly with stirring； Then, KOH, thickener solution are mixed in the latex respectively； After filtrated, stewed and defoamed, the desired latex is gotten；
    In the dry weight, the dipping latex is divided into the following components according to the mass percentage: rubber latex 30～85％, vulcanizater 1～5％, active agent 0.2～5％, accelerator  0.2～5％, reinforcing agent 0～10％, antioxidant 0.01～1％, KOH 0.01～0.5％, thickener 0.01～0.5％, Neutron Shielding filler 10～68％, The total mass percentage is 100％；
    The related rubber latex is water-based latex；
    The related thickener comprises at least one of sodium alginate, sodium polyacrylate, casein, polyurethane, methylcellulose.
  2. The method according to claim 1, wherein the step (1) , Neutron Shielding filler is pretreated by ball millingfor at least 12 h with 300 ～2000 rpm.
  3. The method according to claim 1, wherein the step (1) , Organic dispersant comprises at least one of three ethyl hexyl phosphoric acid, sodium dodecyl sulfate, methyl amyl alcohol, cellulose derivatives, polyacrylamide, guar gum, fat acid polyethylene glycol ester silicate, and sodium dibutyl naphthalene sulfonate.
  4. The method according to claim 1, wherein the step (2) , The compounding agents are milled by ball milling for at least 12 h with 300～2000 rpm.
  5. The method according to claim 1, wherein the step (2) , Inorganic active agent comprises at least one of metal oxide, hydroxide and magnesium carbonate. Organic active agent comprises at least one of fatty acids, amines, soaps and polyhydric alcohols and amino alcohols.
  6. The method according to claim 1, wherein the step (3) , The rubber latex comprises at least one of natural rubber latex, latex neoprene, nitrile rubber latex, styrene butadiene rubber latex, polyurethane rubber latex, butadiene rubber latex, acrylate latex rubber, chlorinated polyethylene rubber latex, chlorosulfonated polyethylene rubber latex, one or some of them.
  7. The method according to claim 1, the desired latex is gotten, then:
    (a) Soak the glove mold in coagulant after the mold is cleaned, then dry it；
    (b) Dip the related mold in the related latex for 5s～10min, then dry it；
    (c) Roll edge, cure, unload mold, wash gloves, dry gloves, that is the related Neutron Shielding gloves.
  8. The method according to claim 7, The related coagulant is aqueous solution of CaCl2, BaCl2, Ca (NO3) 2, Ba (NO3) 2, one or some of them. The coagulant also contains starch and thickener. The solute mass fraction of coagulant is 0 ～ 60％.
  9. The related Neutron Shielding gloves are prepared by foregoing method.
PCT/CN2016/099191 2016-09-18 2016-09-18 Preparation method of latex gloves for neutron shielding and the gloves WO2018049645A1 (en)

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CN113480743A (en) * 2021-05-31 2021-10-08 中国工程物理研究院材料研究所 Composite latex capable of preparing high-performance flexible product and matching process thereof
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CN113480743A (en) * 2021-05-31 2021-10-08 中国工程物理研究院材料研究所 Composite latex capable of preparing high-performance flexible product and matching process thereof
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