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A kind of pcl/plga composite foaming 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 problems such as 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 the uniformity of nucleation points, increasing the nucleation rate, and avoiding the cavitation effect

Active Publication Date: 2022-01-28
ZHENGZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

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/plga composite foaming oil-absorbing material and preparation method thereof
  • A kind of pcl/plga composite foaming oil-absorbing material and preparation method thereof
  • A kind of pcl/plga composite foaming oil-absorbing material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] Embodiment 1: the preparation method of PCL / PLGA composite foaming oil-absorbing material

[0038] The preparation method of PCL / PLGA composite foamed oil-absorbing material comprises the following steps:

[0039] (1) PCL and PLGA are melt-blended to make thin plates

[0040] 78wt% PCL (number average molecular weight 50000), 20wt% PLGA (weight average molecular weight 100000, ratio of lactic acid LA to glycolic acid GA 50:50), 0.5wt% antioxidant 1010, 1.0wt% lubrication Polytetrafluoroethylene and 0.5wt% anti-hydrolysis agent Bio Adimide 100 were melt-blended on a twin-screw extruder and pelletized to obtain PCL / PLGA blended granules; the PCL / PLGA blended granules were placed in vacuum hot pressing On the machine, the temperature and pressure were respectively 100 °C and 1200 psi for 5 minutes, and the PCL / PLGA blended particles were supported on thin plates with length, width and height of 300 mm, 200 mm and 1 mm, respectively.

[0041] (2) High temperature heat tre...

Embodiment 2

[0051] Example 2: Influence of high temperature thermal pretreatment before saturation on properties of PCL / PLGA composite foamed oil-absorbing material

[0052] 1. Specimen Preparation

[0053] Sample 1: PCL / PLGA composite foaming oil-absorbing material prepared with reference to the method steps (1) to (6) described in Example 1, wherein the temperature of the high-temperature heat treatment in step (2) is 85°C, which is denoted as the sample 1.

[0054] Control sample 1: Refer to step (1) in Example 1 to prepare a thin plate. In step (3), the temperature of the mold is raised to 40 ° C, and supercritical CO of 2000 psi is passed in. 2 Saturation 2.0h to form PCL / PLGA polymer and CO 2 The PCL / PLA composite foaming oil-absorbing material prepared with reference to steps (4) to (6) is recorded as control sample 1.

[0055] 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-temp...

Embodiment 3

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

[0079] 1. Specimen Preparation

[0080] 1) Sample 2

[0081]Lubrication with 88wt% PCL (number average molecular weight 50000), 10wt% PLGA (weight average molecular weight 100000, ratio of lactic acid LA to glycolic acid GA 50:50), 0.5wt% antioxidant 1010, 1.0wt% lubrication A sample of PCL / PLGA composite foaming oil-absorbing material was prepared by referring to the preparation method in Example 1, and was designated as Sample 2. During this process, ultrasound only acts on the stage after saturation and before pressure relief.

[0082] 2) Control sample 2

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

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Abstract

The invention belongs to the field of environmental protection, and specifically discloses a PCL / PLGA composite foamed oil-absorbing material and a preparation method thereof. The preparation method includes the following steps: 1) melt-blending PCL, PLGA, and additives, and pressing them into thin plates; ( 2) Put the thin plate in the reaction kettle, heat it to 42°C-55°C, and pass supercritical gas after the temperature is constant, control the pressure range to 1800psi-2500psi, then raise the temperature to 80°C-90°C, and keep it warm for 3-5 minutes; (3) After heat preservation, lower the temperature to 40°C-45°C, and saturate at this temperature for 1h-3h; (4) After saturation, perform ultrasonic treatment on the thin plate; (5) After ultrasonication, release the ultra- The critical fluid is in the state of normal pressure in the reactor, and then the temperature is lowered to 0-10°C; (6) After the temperature is lowered, the sheet is taken out and dried to obtain the PCL / PLGA composite foam oil-absorbing material. The PCL / PLGA composite foamed oil-absorbing material prepared by the invention has small cell size, high cell density, is biodegradable, has strong oil-absorbing performance, and can be used repeatedly.

Description

technical field [0001] The invention belongs to the field of environmental protection, in particular to the field of polymer material processing for oil pollution treatment, and more particularly relates to a PCL / PLGA composite foamed 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 or adsorbents, and...

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 蒋晶蔡泊志李倩王小峰金志伟郭海洋乔玉辉
Owner ZHENGZHOU UNIV
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