A kind of pcl/pla composite foam oil-absorbing material and preparation method thereof

A technology for composite foaming and oil-absorbing materials, applied in separation methods, chemical instruments and methods, liquid separation, etc., can solve the problems of inability to achieve fast and efficient oil absorption, low mechanical strength of film materials, and inability to be recycled for multiple times. Achieve the effect of improving nucleation rate and nucleation point uniformity, avoiding cavitation effect, and increasing foaming ratio

Active Publication Date: 2022-01-28
ZHENGZHOU UNIV
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  • 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 pores, and the internal pores are relatively independent and poor in connectivity, so it is impossible to achieve fast and efficient oil absorption

Method used

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  • A kind of pcl/pla composite foam oil-absorbing material and preparation method thereof
  • A kind of pcl/pla composite foam oil-absorbing material and preparation method thereof
  • A kind of pcl/pla composite foam oil-absorbing material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] Embodiment 1: The preparation method of PCL / PLA composite foam oil-absorbing material

[0039] The preparation method of PCL / PLA composite foaming oil-absorbing material comprises the following steps:

[0040] (1) PCL and PLA are melt blended to make a thin plate

[0041] With the PCL (number average molecular weight 50000) of 68wt%, the PLA (weight average molecular weight 210000) of 30wt%, the antioxidant 1010 of 0.5wt%, the lubricating agent polytetrafluoroethylene of 1.0wt%, the antihydrolysis agent of 0.5wt% Bio Adimide 100 was melt blended and granulated on a twin-screw extruder to obtain PCL / PLA blended particles; the PCL / PLA blended particles were placed on a vacuum hot press, and the temperature and pressure were respectively 100 ° C and 1200 psi Under the condition of hot pressing for 5 minutes, the PCL / PLA blended particles were prepared into thin plates with length, width and height of 300mm, 200mm and 1mm respectively.

[0042] (2) High temperature pretre...

Embodiment 2

[0052] Example 2: Effect of high temperature pretreatment before saturation on the performance of PCL / PLA composite foamed oil-absorbing material

[0053] 1. Specimen Preparation

[0054] Sample 1: The PCL / PLA composite foamed oil-absorbing material prepared with reference to the steps (1) to (6) of the method described in Example 1, wherein the temperature of the high-temperature pretreatment in step (2) is 80°C, recorded as Sample 1.

[0055] Control Sample 1: The only difference between Control Sample 1 and Sample 1 in the preparation process is that Control Sample 1 has not undergone the high-temperature pretreatment process before step (2) saturation in Example 1. Specifically: the thin plate is prepared with reference to step (1) in Example 1. In step (3), the mold temperature is raised to 40° C., and 2000 psi of supercritical CO is introduced. 2 Saturation 1.0h, forming PCL / PLA polymer and CO 2 For the homogeneous system, the PCL / PLA composite foam oil-absorbing mate...

Embodiment 3

[0078] Embodiment 3: the impact of ultrasonic treatment in different stages on the performance of PCL / PLA composite foam material

[0079] 1. Specimen Preparation

[0080] 1) Sample 2

[0081]With 78wt% PCL (number average molecular weight 50000), 20wt% PLA (weight average molecular weight 210000), 0.5wt% antioxidant 1010, 1.0wt% lubricant polytetrafluoroethylene, 0.5wt% antihydrolysis agent Bio Adimide 100 was used as the raw material, and the PCL / PLA composite foamed oil-absorbing material sample prepared by referring to the preparation method in Example 1 was designated as sample 2. That is, during the preparation process of sample 2, the ultrasound only acts on the stage after saturation and before pressure release.

[0082] 2) Control sample 2

[0083] The preparation raw material of control sample 2 is the same as sample 2, also with reference to the preparation method given in Example 1, but ultrasonic treatment acts on step (4) and step (5) in the preparation proces...

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Abstract

The invention belongs to the field of environmental protection, and specifically discloses a PCL / PLA composite foamed oil-absorbing material and a preparation method thereof. The preparation method includes the following steps: (1) Melting and blending PCL, PLA, and additives, and pressing them into thin plates; (2) Put the thin plate in the reaction kettle, heat it to 40°C-50°C, and after the temperature is constant, introduce supercritical gas, control the pressure range from 1600psi to 2500psi, then continue to heat up to 80°C-100°C, and keep warm for 5~ 10min; (3) After heat preservation, lower the temperature to 36°C-42°C, and saturate at this temperature for 1h-4h; (4) After saturation, perform ultrasonic treatment on the thin plate; (5) After ultrasonication, release supercritical The fluid enters the reaction kettle under normal pressure, and then lowers the temperature in the reaction kettle to 0-10°C; (6) After cooling down, take out the sheet and dry it to obtain a PCL / PLA composite foam oil-absorbing material. The PCL / PLA composite foamed oil-absorbing material prepared by the invention has high cell density, high foaming ratio, biodegradability, high oil-absorbing ratio and reusability.

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 specifically to a PCL / PLA composite foamed oil-absorbing material and a preparation method thereof. Background technique [0002] With the rapid development of modern industry, petroleum and its products are widely used, and oil spill accidents of different scales occur frequently, affecting the survival of marine organisms 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 amount of oil pollutants have entered rivers, oceans and other water bodies, and entered the human body through the food chain, seriously threatening human health. At present, the main methods to deal with oil pollution include in-situ combustion, use of oil dispersants or adsorbents, biodegrada...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08J9/12C08L67/04B01D17/022
CPCC08J9/122C08J9/0061B01D17/0202C08J2367/04C08J2467/04C08J2203/06C08J2203/08
Inventor 蒋晶曹永俊李倩李子辉彭宇李家苇侯健华
Owner ZHENGZHOU UNIV
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