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Preparation method of nylon 6 and natural fiber composite material

A natural fiber and composite material technology, applied in the field of polymer material preparation, to achieve the effect of improving comprehensive performance, good dispersion effect and improving uniformity

Inactive Publication Date: 2015-02-25
SICHUAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, the traditional anionic polymerized nylon 6 polymerization system cannot be directly used for the reaction processing of natural fiber composites.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Add the caprolactam monomer into the reaction kettle, heat up to 100°C to melt, then vacuumize and drain for 15 minutes, then add the initiator caprolactam magnesium bromide 0.6mol%, vacuumize and drain for 15 minutes, and finally add bis-acylated lactam-1,6 - Hexamethylenediamine 0.6mol%, mix well and then vacuumize for 10min. The above-prepared active material was poured into a mold with ramie fiber fabric placed, vacuumed to -0.05Mpa quickly, polymerized at a polymerization temperature of 160°C for 60min, and the mold was cooled naturally to obtain a composite material product.

Embodiment 2

[0028] Add the caprolactam monomer into the reaction kettle, heat up to 120°C to melt, then vacuumize and drain for 15 minutes, then add the initiator caprolactam magnesium bromide 0.6mol% and vacuumize and drain for 15min, finally add TDI 0.6mol%, mix well. The active material prepared above was poured into a mold with ramie fiber fabric placed, quickly evacuated to -0.05Mpa, polymerized at a polymerization temperature of 165°C for 60min, and the mold was naturally cooled to obtain a composite material product.

Embodiment 3

[0030] Add the caprolactam monomer into the reaction kettle, heat up to 100°C to melt, then vacuumize and drain for 15 minutes, then add the initiator caprolactam magnesium bromide 0.6mol% and vacuumize and drain for 15 minutes, then add 5% of the dried cellulose powder into the In the solution, stir well to make it evenly dispersed, and finally add 0.6mol% of bisacylated lactam-1,6-hexanediamine, mix well and then vacuumize for 10min. Pour the above-prepared active material into the preheated mold, quickly evacuate to -0.096Mpa, polymerize at a polymerization temperature of 160°C for 60 minutes, and cool the mold naturally to obtain a composite material product.

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Abstract

The invention discloses a preparation method of a nylon 6 and natural fiber composite material. The method comprises the steps that: 1, natural fiber is pretreated; 2, the pretreated natural fiber is dried for 24h in a lyophilization machine; and the fiber is preheated; 3, nylon 6 monomer caprolactam is heated to 80-130 DEG C and is fused; vacuuming dewatering is carried out; an initiator is added, and vacuuming dewatering is carried out; an activating agent is added, the mixture is well mixed, and vacuuming dewatering is carried out, such that an active material is prepared; and 4, the active material is added into natural fiber; rapid vacuuming is carried out; polymerization is carried out for 0.5-1.5h under a polymerization temperature; and cooling is carried out, such that nylon 6 and natural fiber composite material is obtained. According to the material, a reaction processing method is adopted, such that the natural fiber can be more uniformly dispersed in resin, and composite material interface performance can be improved. The mechanical performance of the material is higher than common nylon 6, and the material has an environment-friendly characteristic. The material has a wide application range.

Description

technical field [0001] The invention belongs to the field of polymer material preparation, and in particular relates to a preparation method of nylon 6 and natural fiber composite material. Background technique [0002] Composite materials occupy a place in the field of material science with irreplaceable advantages such as high strength and energy saving, but the waste of many composite materials has brought about increasingly serious environmental problems. With the continuous enhancement of people's awareness of environmental protection, the application of renewable, sustainable utilization and degradable biomaterials has attracted much attention and attention. Environmentally friendly materials are especially concerned by scholars. Therefore, the research and development of natural fiber-reinforced composite materials has become a research hotspot in the new century, such as Chinese patents CN102532661A, CN101003667A, and CN102002859A, which disclose polyethylene, polyla...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L77/02C08L1/02C08G69/20
Inventor 杨鸣波阚泽陈鹏
Owner SICHUAN UNIV
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