Aramid III fiber reinforced self-lubricating gasket composite material and preparation method thereof

A liner material and self-lubricating technology, applied in the aramid III fiber reinforced self-lubricating liner composite material and its preparation, in the field of fiber-reinforced self-lubricating liner composite material, can solve the problem that the interface reinforcement cannot be achieved, and the fiber- Resin matrix, modification damage and other problems, to achieve the effect of improving mechanical properties and friction and wear properties, slowing down the generation and expansion of micro-cracks, excellent bearing capacity and wear life

Active Publication Date: 2021-07-09
LANZHOU INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this method is not suitable for the modification of fiber-resin matrix interface properties in aramid III / PTFE self-lubricating gaskets
The main reason is that during the weaving process of aramid III fiber fabrics, healds and buckles need to be threaded, and the pre-modifications will be destroyed by friction during the weaving preparation stage and during the weaving process, failing to achieve the purpose of interfacial reinforcement.

Method used

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  • Aramid III fiber reinforced self-lubricating gasket composite material and preparation method thereof
  • Aramid III fiber reinforced self-lubricating gasket composite material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] (1) 200D aramid III fiber and PTFE fiber are plied and twisted on the fiber twisting equipment to obtain a twisted yarn with a twist of 160 twists / meter;

[0027] (2) Prepare polyester size, add antioxidant, antistatic agent and other components to it, and carry out sizing treatment on aramid III fiber;

[0028] (3) Sizing aramid III fibers are used as warp yarns, and twisted yarns of aramid fibers III and PTFE fibers are used as weft yarns, and are woven on a loom, and the gray fabric is a plain weave; the fabric after being off the machine is desized to obtain aramid fibers III / PTFE fabric gray cloth;

[0029] (4) Immerse the aramid III / PTFE fabric gray cloth in the aqueous solution of tannic acid (1mg / ml)-aminopropyltriethoxysilane (1mg / ml) and react at room temperature for 6 hours to obtain surface-activated aramid fiber III / PTFE fabric gray cloth;

[0030] (5) The activated aramid III / PTFE fabric gray cloth was immersed in the MgAl-LDH precursor solution (0.012m...

Embodiment 2

[0034] (1), (2), (3), (4) are the same as embodiment 1;

[0035] (5) The activated aramid III / PTFE fabric gray cloth was immersed in the MgAl-LDH precursor solution (0.009molMg(NO 3 ) 2 ·6H 2 O and 0.003mol Al(NO 3 ) 3 9H 2 O added to 120ml deionized water), pressurized reaction at 120°C for 24h, after the reaction, wash the fabric gray cloth with deionized water, and dry at 80°C; soak the dried aramid III / PTFE fabric gray cloth into dopamine-polyethylene Imine buffer solution (1.5mg / ml), react at room temperature for 6h, take out and wash with deionized water, dry at 80°C, and then immerse in ANFs dimethyl sulfoxide solution (0.002g / ml), react at room temperature for 1h, take out Rinse with dimethyl sulfoxide for 2 minutes, rinse with deionized water for 3 times, and dry at 80°C to obtain aramid III / PTFE fabric gray fabric with strong-tough integrated interface modification;

[0036] (6) Repeatedly soak the modified aramid III / PTFE fabric gray cloth in the phenolic resi...

Embodiment 3

[0039] (1), (2), (3), (4) are the same as embodiment 1;

[0040] (5) The activated aramid III / PTFE fabric gray cloth was immersed in the MgAl-LDH precursor solution (0.006molMg(NO 3 ) 2 ·6H 2 O and 0.002mol Al(NO 3 ) 3 9H 2 O added to 120ml deionized water), pressurized reaction at 120°C for 24h, after the reaction, wash the fabric gray cloth with deionized water, and dry at 80°C; soak the dried aramid III / PTFE fabric gray cloth into dopamine-polyethylene Imine buffer solution (2mg / ml), react at room temperature for 6h, take it out and wash it with deionized water, dry it at 80°C and immerse it in ANFs dimethyl sulfoxide solution (0.0015g / ml), react at room temperature for 1h, take it out for Rinse with dimethyl sulfoxide for 2 minutes, rinse with deionized water for 3 times, and dry at 80°C to obtain aramid III / PTFE fabric gray fabric with integrated strong-tough interface modification;

[0041] (6) Repeatedly soak the modified III / PTFE fabric gray cloth in the phenolic...

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Abstract

The invention discloses a preparation method of an aramid III fiber reinforced self-lubricating gasket composite material. The preparation method comprises the following steps: weaving is conducted on a weaving machine by taking sized aramid III fibers as weft yarns and taking twisted yarns of the aramid III fibers and PTFE fibers as warp yarns; and after being subjected to desizing treatment, the fabric is firstly soaked in a tannic acid-aminopropyltriethoxysilane aqueous solution for activation, then soaked in a MgAl-LDH precursor solution for enhanced modification through a hydrothermal interface reaction, then soaked in a dopamine-polyethyleneimine buffer solution for tackifying modification, and finally soaked in aramid nanofibers for toughening modification, and finally the strength-toughness integrated interface modified aramid fiber III/PTFE fabric grey cloth is obtained. The aramid III fiber reinforced self-lubricating gasket prepared by the preparation method has excellent mechanical properties and frictional wear properties, so that the composite material of the fabric self-lubricating gasket is greatly improved, and the comprehensive performance of fabric type self-lubricating parts is further improved.

Description

technical field [0001] The invention relates to a fiber-reinforced self-lubricating liner composite material, in particular to an aramid III fiber-reinforced self-lubricating liner composite material and a preparation method thereof, belonging to the field of composite materials and the technical field of lubricating materials. Background technique [0002] The self-lubricating liner plays the role of lubricant in the bearing. It converts the friction between the two metal surfaces in the bearing into the friction between the metal and the self-lubricating liner. Its performance directly determines the service stability and performance of the self-lubricating bearing. service life. At present, the reinforcing fibers used in self-lubricating gaskets are mainly aramid fibers and glass fibers. [0003] Aramid III fiber is a kind of para-aramid. Aramid III is obtained by copolymerization of three monomers: p-phenylenediamine, terephthaloyl chloride and diamine containing hetero...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D06M15/41D06M15/37D06M15/61D06M11/44D06M11/45D06M15/59D06M13/238D06M13/513D06M15/507D06M101/36D06M101/22
CPCD06M15/41D06M15/37D06M15/61D06M11/44D06M11/45D06M15/59D06M13/238D06M13/513D06M15/507D06M2101/36D06M2101/22D06M2200/40D06M2200/35
Inventor 杨明明陈祖均张招柱李佩隆姜葳袁军亚赵鑫储凡杰
Owner LANZHOU INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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