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Preparation method and device of a nanofiber composite light-transmitting material

A technology of light-transmitting materials and nanofibers, which is applied in fiber processing, conjugated synthetic polymer rayon, non-woven fabrics, etc., can solve the problems of low reinforcing fiber content, complex parameters, unstable process, etc. The effect of enhanced tensile mechanical properties, undisturbed light transmission, and simple process

Inactive Publication Date: 2011-12-14
DONGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there are still some deficiencies in the nanofiber-reinforced transparent composites prepared by coaxial co-spinning: (1) The various parameters involved in coaxial electrospinning are relatively complicated, the process is unstable, and not all of the prepared fibers are shell-core structure; (2) The content of reinforcing fibers in the composite material is low, and the effect of improving the mechanical properties of the material is not significant. If the content of the reinforcing material is increased, the supply rate of the core material during spinning must be increased, resulting in the diameter of the reinforcing fiber being larger than that of visible light The low-end limit wavelength will eventually affect the light transmittance of the composite material; (3) The performance of the reinforcement fiber-matrix interface cannot be changed

Method used

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  • Preparation method and device of a nanofiber composite light-transmitting material
  • Preparation method and device of a nanofiber composite light-transmitting material
  • Preparation method and device of a nanofiber composite light-transmitting material

Examples

Experimental program
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Effect test

Embodiment l

[0026] Weigh 0.8g of PA-6 and 4g of PMMA with an electronic analytical balance and dissolve them in 10g and 16g of trifluoroethanol respectively, stir for 24h until completely dissolved, and obtain PA-6 enhancements with a concentration of 8% (solute gram / solvent gram) respectively. Fibrous material spinning solution and 25% (solute gram / solvent gram) PMMA light-transmitting matrix material spinning solution.

[0027] Such as figure 1 Shown is a schematic diagram of a uniform blending device. Spinnerets 2 are installed on the left and right sides of the receiving drum 1, and the supply rates of the spinning light-transmitting matrix material and the reinforcing material stock solution are respectively controlled by a micro-injection pump 3. A voltage is applied between the receiving drums 1 through a high-voltage power supply 4, a stable jet is formed between the spinneret 2 and the receiving drum 1, and the left reinforcing material spinneret 2 is reciprocated to collect the...

Embodiment 2

[0029] Weigh 3g PA-6 and 3g PMMA with an electronic analytical balance and dissolve them in 20g and 10g of trifluoroethanol respectively, stir for 24h until completely dissolved, and obtain PA-6 reinforcing fibers with a concentration of 15% (solute gram / solvent gram) respectively Material spinning solution and 30% (solute gram / solvent gram) PMMA light-transmitting matrix material spinning solution.

[0030]The conditions for uniform blending are as follows: the voltage of the transparent base material is 1 kV, the electric field or receiving distance is 2 cm, the diameter of the spinneret is 1 μm, and the supply rate of spinning dope is 0.1 mL / h; the voltage of the reinforcing material is 20 kV, and the electric field or receiving distance is 4cm, the diameter of the spinneret is 1.2μm, the supply rate of PA-6 spinning solution is 0.2mL / h; the rotation speed of the drum collection device is 1rpm, the ambient temperature is 20°C, and the relative humidity of the environment is ...

Embodiment 3

[0032] Weigh 1g PA-6 and 3g PMMA with an electronic analytical balance and dissolve them in 10g and 10g of trifluoroethanol respectively, stir for 24h until completely dissolved, and obtain PA-6 reinforcing fibers with a concentration of 10% (solute gram / solvent gram) respectively Material spinning solution and 30% (solute gram / solvent gram) PMMA light-transmitting matrix material spinning solution.

[0033] The conditions for uniform blending are as follows: the voltage of the transparent base material is 100kV, the electric field or receiving distance is 50cm, the diameter of the spinneret is 0.1mm, and the supply rate of spinning dope is 20mL / h; the voltage of the reinforcing material is 80kV, and the electric field or receiving distance is 60cm, the spinneret diameter is 0.2mm, the supply rate of PA-6 spinning dope is 18mL / h; the rotating speed of the drum collection device is 10000rpm, the ambient temperature is 60°C, and the relative humidity of the environment is 80%. T...

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Abstract

The invention relates to a method and device for preparing a nanofiber composite light-transmitting material, comprising: (1) preparing PA-6 spinning solution and PMMA spinning solution respectively, and spinning with a uniform blending device to obtain a composite nanofiber mat; ( 2) Lay the above-mentioned composite nanofiber felt in a mold, heat and pressurize, keep warm and pressurized for 20-60 minutes, take off the mold, and wait for complete cooling at room temperature to obtain the product. The device includes a receiving drum (1), a spinneret (2), a micro-injection pump (3) and a high-voltage power supply (4). The invention has the advantages of simple process, low cost and easy operation; the prepared composite light-transmitting material contains nanofiber reinforcement materials with a diameter less than 400nm, not only the original light transmission is not disturbed, but also the tensile mechanical properties can be significantly enhanced, thus It is very suitable for those occasions that have high requirements for light weight and mechanical properties.

Description

technical field [0001] The invention belongs to the field of preparation of composite light-transmitting materials, in particular to a preparation method and device of nanofiber composite light-transmitting materials. Background technique [0002] Plexiglass (such as polymethyl methacrylate, PMMA) is widely used in many fields such as car windows, face shields, spectacle lenses, and aircraft window covers because of its excellent light transmission, good processability, unbreakable, and light weight. However, its mechanical properties, especially its mechanical strength and impact toughness, are relatively low. According to the statistics of the Federal Aviation Administration of the United States, from 1990 to 2002, there were 7,212 collisions between plexiglass windows on commercial aircraft and birds and other objects in the United States, of which 449 cases caused serious losses. Therefore, further improving the mechanical properties of plexiglass has very important pra...

Claims

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Application Information

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IPC IPC(8): D04H1/72D04H1/44D01D5/00D01F8/10D01F8/12
Inventor 张彦中袁卉华贺斌李碧云冯蓓
Owner DONGHUA UNIV
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