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Preparation method of room temperature sulfurated silicon rubber material co-enhanced by lignin and white black carbon

A technology of room temperature vulcanization and white carbon black, which is applied in the field of rubber materials to achieve the effects of cost reduction, simple process and remarkable reinforcement effect

Inactive Publication Date: 2014-05-07
NANCHANG HANGKONG UNIVERSITY
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The technical effect of the present invention is: the present invention uses lignin and fumed silica as a synergistic reinforcing agent to reinforce room temperature vulcanized silicone rubber, and silica plays a role in improving mechanical properties, and low-cost lignin filling can reduce The cost of silicone rubber materials solves the problem of resource utilization of lignin materials. This method can not only effectively utilize cheap and large quantities of lignin resources, but also effectively reduce the cost of room temperature vulcanized silicon rubber materials, and the reinforcement effect is remarkable. The process is simple

Method used

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  • Preparation method of room temperature sulfurated silicon rubber material co-enhanced by lignin and white black carbon

Examples

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Effect test

Embodiment 1

[0010] (1) Lignin purification: 100 g of wheat straw enzymatic lignin residue was added to 500 ml of 12% NaOH solution under continuous stirring and boiled for 2 h, and then the insoluble matter was removed by hot filtration. After the filtrate was cooled to room temperature, the pH value was adjusted to 7 with 1 mol / L of HCl, and lignin was precipitated after standing, and purified such as figure 1 lignin in

[0011] (2) Preparation of room temperature vulcanized silicone rubber material synergistically reinforced by lignin and silica: 100 g of 107 glue with a viscosity of 10000 cp, 5 g of methyl silicone oil, 80 g of n-hexane, 2 g of lignin, and 10 g of silica Mix with 0.1 g of coupling agent KH560 in a high-energy ball mill for 2 h at high speed, add 0.1 g of diisobutyltin dilaurate and 5 g of tetraethoxysilane, stir in vacuum for 10 min, pour into a mold for vacuum defoaming Cured at room temperature for 24 hours, cut into dumbbell-shaped samples for tensile performance t...

Embodiment 2

[0013] (1) lignin purification and modification are the same as in Example 1;

[0014] (2) Preparation of lignin-reinforced room temperature vulcanized silicone rubber material: 100 g of 107 glue with a viscosity of 10000 cp, 5 g of methyl silicone oil, 100 g of n-hexane, 4 g of lignin, 10 g of white carbon black and 0.1 g of dioxane The joint agent KH560 was ball-milled at a high speed in a high-energy ball mill for 2 hours, then 0.2 g of diisobutyltin dilaurate and 5 g of tetraethoxysilane were added, stirred in a vacuum for 10 minutes, poured into a mold for vacuum defoaming, and cured at room temperature for 24 hours , cut into dumbbell-shaped samples according to GB / T528-1998 for tensile performance test, the tensile strength is 0.48 MPa, the elongation at break is 54%, compared with pure room temperature vulcanized silicone rubber, respectively increased by 71% and decreased by 24% (corresponding The tensile strength test value of the blank sample of pure room temperatur...

Embodiment 3

[0016] (1) lignin purification and modification are the same as in Example 1;

[0017] (2) Preparation of lignin-reinforced RTV silicone rubber material: 100 g of 107 glue with a viscosity of 10000 cp, 5 g of methyl silicone oil, 100 g of n-hexane, 2 g of lignin, 8 g of white carbon black and 0.1 g of The joint agent KH560 was ball-milled at a high speed in a high-energy ball mill for 2 hours, then 0.2 g of diisobutyltin dilaurate and 5 g of tetraethoxysilane were added, stirred in a vacuum for 10 minutes, poured into a mold for vacuum defoaming, and cured at room temperature for 24 hours , cut into dumbbell-shaped samples according to GB / T528-1998 for tensile performance testing, the tensile strength is 0.72 MPa, and the elongation at break is 73%, which are respectively increased by 157% and 9% compared with pure room temperature vulcanized silicone rubber (corresponding The tensile strength test value of the blank sample of pure room temperature vulcanized silicone rubber w...

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Abstract

A preparation method of a room temperature sulfurated silicon rubber material co-enhanced by lignin and white black carbon comprises the following steps: (1) preparing the following raw materials in parts by weight: 100 parts of alpha,omega-dihydroxypolydimethylsiloxane (107 glue), 0 to 10 parts of lignin, 0 to 10 parts of white carbon black, 0.1 to 0.5 part of coupling agent, 1 to 10 parts of diluent, 50 to 100 parts of solvent, 4 to 10 parts of coupling agent, and 1 part of catalyst; (2) adding the 107 glue, diluent, solvent, lignin, white carbon black and coupling agent into a high-performance ball grinder, grinding for 2 hours, then adding the coupling agent and catalyst, vacuumizing and stirring for 10 minutes, pouring the mixture into a mould, eliminating the bubbles in vacuum environment, and allowing the mixture to carry out curing reactions for 24 hours at a room temperature so as to obtain the room temperature sulfurated silicon rubber material co-enhanced by lignin and white black carbon. Low cost lignin is cooperatively used with white black carbon as an enhancing agent for the room temperature sulfurated silicon rubber material, the enhancing agent can prominently improve the mechanical property of the room temperature sulfurated silicon rubber material, at the same time, the lignin resource is effectively utilized, and the manufacture cost for room temperature sulfurated silicon rubber material is reduced.

Description

technical field [0001] The invention relates to the field of rubber materials, in particular to a preparation method for synergistically reinforcing room temperature vulcanized silicone rubber materials with lignin and white carbon black. Background technique [0002] Silicone rubber elastomer is a high molecular polymer with a three-dimensional network structure formed by adding a filler to a liquid polyorganosiloxane-based rubber with a lower molar mass, and cross-linked under the action of a cross-linking agent and a catalyst. Silicone rubber has excellent properties such as high and low temperature resistance, aging resistance, electrical insulation, flame retardant, and physiological inertia, so it is widely used in aerospace, electronics, chemicals, textiles, machinery, construction, transportation, medical and health, etc. , has become an indispensable new polymer material in the national economy. The molecular structure of silicone rubber is helical, the molecular ...

Claims

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Application Information

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IPC IPC(8): C08L83/04C08L29/14C08L97/00C08K3/36C08J3/24
Inventor 王法军鄢贵龙
Owner NANCHANG HANGKONG UNIVERSITY
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