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Graphene modified natural latex preparation method and high barrier property condom

A technology of graphene modification and natural latex, which is applied in the direction of male contraceptives, etc., can solve the problem of not being able to prevent the transmission of sexually transmitted diseases, and achieve the effects of reducing the chance of penetration, improving strength and toughness, and improving barrier performance

Active Publication Date: 2017-08-08
沈阳天地乳胶有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
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Problems solved by technology

The "New England Journal of Medicine" reported that the failure rate of condoms to prevent AIDS was 16.7%, and the "British Social Science Medical Journal" reported that the failure rate of condoms to prevent AIDS was as high as 31%; the National Institutes of Health (NIH), Food and Drug Administration FDA, Centers for Disease Control and Prevention (CDC) and the United States Agency for International Development (US-AID) jointly formed a scientific task force to examine hepatitis B, AIDS, gonorrhea, chlamydia, syphilis, chancroid, lymphogranuloma venereum, Several sexually transmitted diseases, including genital herpes and genital warts, found that currently widely used condoms do not prevent the transmission of any of the sexually transmitted diseases

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  • Graphene modified natural latex preparation method and high barrier property condom

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preparation example Construction

[0032] The high-barrier condom of the present invention is prepared by molding graphene-modified natural latex on a condom mold, and the preparation method of the graphene-modified natural latex includes the following steps:

[0033] 1) Mix the graphene powder and the dispersion aid in proportion, and obtain a uniform and stable graphene nano-dispersion A after grinding; wherein the mass ratio of the dispersion aid to the graphene powder is 2-10:1; the graphene The concentration of graphene in nano-dispersion A is 0.5-50mg / ml, the size of the graphene after grinding is 200-800nm, the thickness is 1-3nm, grinding equipment is used for grinding for 5-8 hours; the dispersant is ammonia water, KOH , Casein, Pingping O, Sodium Hexametaphosphate, Dispersant NF, Cetylbenzene Sulfonic Acid, Sodium Cetylbenzene Sulfonate, Stabilizer LW, Sodium Isopropyl Naphthalene Sulfonate and Isobutyl Naphthalene A mixture of at least one of sodium sulfonate.

[0034] 2) After adding stabilizers and sur...

Embodiment 1

[0048] The high barrier condom of this embodiment is prepared by using graphene-modified natural latex, and the preparation method of graphene-modified natural latex includes the following steps:

[0049] 1) Mix the dispersion aid and graphene powder at a mass ratio of 10:1, and obtain a uniform and stable graphene nano-dispersion A after grinding; the graphene concentration in the graphene nano-dispersion A is 0.5 mg / ml, The size of the graphene after grinding is 500-700nm, the thickness is 1-3nm, and the grinding equipment is used to grind for 6 hours during the grinding; the dispersant in this embodiment is a mixture of sodium isopropyl naphthalene sulfonate and sodium isobutyl naphthalene sulfonate liquid.

[0050] 2) After adding stabilizers and surfactants to the natural latex solution under continuous stirring, continue stirring for 5 minutes; then slowly add the graphene nano-dispersion A, and continue stirring for 7 minutes; add accelerators, antioxidants, and vulcanizatio...

Embodiment 2

[0063] The high barrier condom of this embodiment is prepared by molding graphene-modified natural latex on a condom mold, and the preparation method of graphene-modified natural latex includes the following steps:

[0064] 1) Mix the dispersing aid and graphene powder at a mass ratio of 5:1, and obtain a uniform and stable graphene nano-dispersion A after grinding; the graphene concentration in the graphene nano-dispersion A is 50 mg / ml, grinding The size of the latter graphene is 200-500nm, the thickness is 1-3nm, and the grinding equipment is used for grinding for 8 hours; the dispersant is dispersant NF.

[0065] 2) After adding stabilizers and surfactants to the natural latex solution under continuous stirring, continue stirring for 10 minutes; then slowly add the graphene nano-dispersion A, and continue stirring for 5 minutes; then add accelerators, antioxidants, and vulcanization And vulcanizing active agent to obtain latex mixture B.

[0066] Furthermore, 60% natural latex i...

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Abstract

The invention discloses a graphene modified natural emulsion preparation method and a high barrier condom. The graphene modified natural emulsion preparation method and the high barrier condom have the beneficial effects that firstly graphene and a dispersing agent mixed liquor are mixed, ground and stirred and then the product is mixed in a natural emulsion aqueous solution, so that graphene can be uniformly dispersed in emulsion and the strength of a natural emulsion composite material is improved; meanwhile, the number of micropores is smaller due to the graphene / emulsion composite action, thus greatly reducing the virus penetration probability; the thickness of the graphene condom can be 5-80mu m, so that the use requirements of the condom can be met; dense high barrier packing layers are formed by the composite crosslinked nano-packing technology, so that the natural gaps among molecules are reduced; therefore not only can HIVs be blocked but also hepatitis B viruses, hepatitis C viruses, human papilloma viruses, and the like, and most harmful bacteria, which are smaller than the HIVs, can not pass through the micropores.

Description

Technical field [0001] The invention belongs to the technical field of natural rubber compositions, and specifically relates to a method for preparing graphene-modified natural latex and a condom with high barrier properties. Background technique [0002] The role of condoms is mainly used to prevent pregnancy and prevent sexually transmitted diseases, also called condoms. However, some research projects of the National Family Planning Commission of China and a large number of international data have shown that: the condom products currently on the market are mainly made of natural latex, and the natural cracks are about 3000nm, which is enough to prevent human sperm heads with a diameter of about 5000nm. , But the diameter of HIV is only 120nm, the diameter of human papilloma virus is between 45-55nm, and the diameter of large spherical particles in hepatitis B virus is 42nm. The size of various viruses is much smaller than the natural cracks of natural latex. Even if condoms a...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L7/00C08K13/06C08K9/04C08K9/02C08K3/04C08K3/06C08K5/13C08K3/22A61F6/04
CPCA61F6/04C08K3/04C08K3/06C08K3/22C08K5/13C08K9/02C08K9/04C08K13/06C08K2003/2296C08K2201/011C08L7/00
Inventor 饶先花潘长富李朝龙高翾王强史浩飞
Owner 沈阳天地乳胶有限公司