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A kind of high-barrier TPU film for pipeline lining and preparation method thereof

A high-barrier, thin-film technology, applied in coatings, polyurea/polyurethane coatings, etc., can solve the problems of poor dispersion, easy accumulation of GONRs, etc., and achieve the effects of good compatibility, improved penetration difficulty, and reduced solubility.

Active Publication Date: 2017-09-22
FUZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, like MWCNTs, GONRs have problems such as easy aggregation and poor dispersion in some organic solvents, which limit their use in composite materials to a certain extent.

Method used

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  • A kind of high-barrier TPU film for pipeline lining and preparation method thereof
  • A kind of high-barrier TPU film for pipeline lining and preparation method thereof
  • A kind of high-barrier TPU film for pipeline lining and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Slowly pour 15 g of pre-dried TPU particles into 80 mL of DMF solution, place it in a blast drying oven at 80 ° C for 1 h, and then stir the mixed system on a mechanical stirrer for 3.5 h until the TPU is completely dissolved. Place in a 100W ultrasonic cleaner for ultrasonic dispersion for 2 hours, then pour the mixed pasty liquid into a small volumetric flask with a straw, pump out the air in the pasty liquid on a suction filter and let it stand for 1.5 hours. Place the glass plate with a clean surface on the film coating machine to coat the film, and control the film thickness to 0.08mm. After the coating is completed, let the glass plate air at room temperature for 24 hours to fully evaporate the solvent and obtain a pure TPU material film.

Embodiment 2

[0025] A high-barrier TPU film for pipeline lining, the preparation method of which is to adopt the oxidation longitudinal cutting MWCNTs method, by controlling the MWCNTs and KMnO in the reaction system 4 The mass ratio of graphene oxide nanoribbons-carbon nanotubes (GONRs-CNTs) nanocomposite composites with different content ratios was prepared, and then TPU resin was used as a matrix to prepare GONRs-CNTs / TPU composite film.

[0026] The diameter of the MWCNTs is 60 nm.

[0027] Its preparation method specifically comprises the following steps:

[0028] 1) Preparation of GONRs-CNTs nanocomposite complex: 180mL concentrated H with a mass fraction of 98% 2 SO 4 Pour into a 250mL round bottom flask, then slowly add 20mL of 85.5% H 3 PO 4 , Stir evenly at a speed of 100 r / min; then add 1g MWCNTs, stir for 1.5h, after the MWCNTs are evenly dispersed, slowly add 2g KMnO 4 (KMnO 4 The speed of adding is controlled at 1g / h), and stirred for 1h to obtain a mixed solution with ...

Embodiment 3

[0032] Step 1) KMnO 4 The addition amount of GONRs-CNTs / TPU composite material is 3g, and other condition parameters are the same as in Example 2, and finally 0.075g of GONRs-CNTs / TPU composite film with a content of 1:3 (marked as 1:3-TPU) is obtained.

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Abstract

The invention discloses a high-barrier TPU film for pipeline lining and a preparation method thereof. Using MWCNTs and TPU as raw materials, adopting an oxidation longitudinal cutting MWCNTs method, and controlling the mass ratio of MWCNTs and KMnO4, GONRs-CNTs nanocomposite materials are prepared. The complex, and then use TPU resin as the matrix, and use the solution coating film forming process to prepare the GONRs-CNTs / TPU composite film. The composite material film prepared by the present invention, on the one hand, reduces the solubility of gas in polymers; on the other hand, it also makes the diffusion and permeation path of gas tortuous, prolongs the diffusion path, and improves the penetration of small molecular substances such as gas. Therefore, the barrier performance of the material has been greatly improved. It is especially suitable for the lining of unconventional gaseous energy transmission pipelines such as shale gas, and has a wide range of social and economic benefits.

Description

technical field [0001] The invention belongs to the technical field of polymer composite film preparation, and in particular relates to a high-barrier TPU film for pipeline inner lining and a preparation method thereof. Background technique [0002] Thermoplastic polyurethane (TPU) is a kind of elastic block copolymer with a wide range of uses. It is composed of soft segments and hard segments. Wear resistance, ductility and processability. At the same time, compared with traditional plastic materials such as PVC, EVA, and butyl rubber (IIR), TPU has the characteristics of high tension, toughness, and aging resistance, and is a mature environmentally friendly material. At present, TPU has been widely used in medical devices, automobile industry, construction industry and sports products, and has become a functional material with great development prospects in the new era. [0003] However, some specific fields have high requirements on the barrier performance of materials,...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08J5/18C08L75/04C08K7/24C08K3/04C09D7/61
CPCC09D5/00C08K2201/008C08K2201/011C09D175/04C09D7/61C08K3/04C08K3/041C08J5/18
Inventor 郑玉婴曹宁宁林锦贤
Owner FUZHOU UNIV
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