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A kind of high foaming ratio pla/pbat/talc composite foaming oil-absorbing material and preparation method thereof

A technology for composite foaming and oil-absorbing materials, applied in the field of environmental protection, can solve the problems of inability to use oil-stained adsorption materials, incapable of oil-stained adsorption treatment, low mechanical strength of film materials, etc., so as to avoid cavitation effect, improve nucleation rate, The effect of increasing the aperture ratio

Active Publication Date: 2022-08-05
ZHENGZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] In addition, the existing technology, such as the publication number CN104987523A, the patent name is a preparation method of polymer microfoamed film, which uses ultrasonic treatment after saturation until the supercritical fluid is released to normal pressure. Due to the cavitation effect caused by too long ultrasonic time, the cells collapse during the cell growth process, which makes the mechanical strength of the prepared film material low and cannot be recycled for many times; in addition, the patented method is only used for polymer The inside of the film is foamed, so that the surface of the polymer film cannot produce cells, and the internal cells are relatively independent and have poor connectivity, so they cannot be used for oil adsorption treatment. Therefore, the method disclosed in this patent cannot be used for oil adsorption materials. preparation of

Method used

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  • A kind of high foaming ratio pla/pbat/talc composite foaming oil-absorbing material and preparation method thereof
  • A kind of high foaming ratio pla/pbat/talc composite foaming oil-absorbing material and preparation method thereof
  • A kind of high foaming ratio pla/pbat/talc composite foaming oil-absorbing material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] Embodiment 1: the preparation method of PLA / PBAT / Talc composite foaming oil-absorbing material

[0037] The preparation method of PLA / PBAT / Talc composite foaming oil-absorbing material, comprising the following steps:

[0038] (1) PLA, PBAT and Talc are melted and blended to make a sheet

[0039] 65wt% PLA (number average molecular weight 50000), 30wt% PBAT, 3wt% talc, 0.5wt% antioxidant 1010, 0.5wt% lubricant polytetrafluoroethylene, 1.0wt% anti-hydrolysis agent Bio Adimide 100 was melt-blended and pelletized on a twin-screw extruder to obtain PLA / PBAT / Talc blended granules; the PLA / PBAT / Talc blended granules were placed on a vacuum hot press, and the temperature and pressure were 160 The PLA / PBAT / Talc blended particles were hot-pressed for 5 min under the conditions of ℃ and 1200 psi to prepare thin plates with length, width and height of 300 mm, 200 mm and 1 mm respectively.

[0040] (2) High temperature heat treatment before saturation treatment

[0041] The thin...

Embodiment 2

[0050] Example 2: Effect of high temperature heat treatment before saturation on the properties of PLA / PBAT / Talc composite foamed oil-absorbing material

[0051] 1. Specimen Preparation

[0052] Sample 1: The PLA / PBAT / Talc composite foamed oil-absorbing material prepared with reference to the method steps (1) to (6) described in Example 1 is designated as sample 1, wherein the high temperature heat treatment in step (2) The temperature is set to 180 °C.

[0053] Control sample 1: refer to the PLA / PBAT / Talc composite foamed oil-absorbing material prepared by steps (1), steps (3) to (6) in Example 1, and denoted as control sample 1.

[0054] The difference between the control sample 1 and the sample 1 in the preparation process is only that the control sample 1 has not undergone the high-temperature heat treatment process before step (2) in Example 1 is saturated.

[0055] 2. Performance test

[0056] The performance test indicators of PLA / PBAT / Talc composite foamed oil-absor...

Embodiment 3

[0078] Example 3: Effects of ultrasonic treatment at different stages on the properties of PLA / PBAT / Talc composite foam materials

[0079] 1. Specimen Preparation

[0080] 1) Sample 2

[0081] 73wt% PLA (number average molecular weight 50000), 20wt% PBAT, 5wt% talc, 0.5wt% antioxidant 1010, 1.0wt% lubricant polytetrafluoroethylene, 0.5wt% anti-hydrolysis agent Bio Adimide 100 was used as a raw material, and a PLA / PBAT / Talc composite foaming oil-absorbing material sample was prepared with reference to steps (1) and steps (4) to (6) in Example 1, which was designated as sample 2. The difference from Embodiment 1 is the relevant parameter settings in steps (2) and (3):

[0082] Step (2) High temperature heat treatment before saturation treatment

[0083] The thin plate is placed in the mold cavity of the supercritical fluid reactor, the temperature in the mold cavity of the reactor is heated to 130 °C, and the supercritical CO is introduced after the temperature is constant. ...

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Abstract

The invention belongs to the field of environmental protection, and specifically discloses a high foaming ratio PLA / PBAT / Talc composite foaming oil-absorbing material and a preparation method thereof. The preparation method comprises the following steps: (1) melting PLA, PBAT, Talc and auxiliary agents Blend and press into a thin plate; (2) place the thin plate in a reactor, heat it to 130°C to 145°C, and after the temperature is constant, introduce supercritical gas to control the pressure range from 1600psi to 1800psi, and then continue to heat up to 160°C ~180℃, keep the temperature for 3~5min; (3) After the heat preservation, reduce the temperature to 100℃~115℃, and saturate at this temperature for 0.5h~1h; (4) After reaching the saturation, perform ultrasonic treatment on the sheet; ( 5) After ultrasonication, release the supercritical fluid to the normal pressure state in the reactor, and then reduce the temperature to 0-5 °C; (6) After cooling, take out the sheet and dry to obtain PLA / PBAT / Talc composite foaming Oil absorbing material. The PLA / PBAT / Talc composite foaming oil-absorbing material prepared by the invention has small cell size, high cell density, is biodegradable, has strong oil-absorbing performance, and can be reused.

Description

technical field [0001] The invention relates to the field of environmental protection, in particular to the field of polymer material processing for oil pollution treatment, and more particularly to a high foaming ratio PLA / PBAT / Talc composite foaming oil-absorbing material and a preparation method thereof. Background technique [0002] With the rapid development of modern industry, oil and its products are widely used, and oil spill accidents of different scales occur frequently, affecting the survival of marine life and destroying the natural ecological environment. At the same time, the discharge of industrial organic wastewater and urban oily wastewater has also increased significantly. A large number of oil pollutants enter the water environment such as rivers and oceans, and enter the human body through the food chain, which seriously threatens human health. At present, the main methods for dealing with oil pollution are in-situ combustion, the use of oil dispersants o...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08J9/12C08L67/04C08L67/02C08K3/34
CPCC08J9/122C08J9/0061C08J9/0066C08J2203/06C08J2203/08C08J2367/04C08J2467/02C08J2205/05
Inventor 蒋晶李子辉李倩乔玉辉侯健华王小峰
Owner ZHENGZHOU UNIV
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