A kind of preparation method of polyacrylate/lignin composite oil-absorbing material

A technology of acrylate and alkyl acrylate, applied in the field of functional polymer synthetic materials, can solve the problems of difficult preparation of high oil-absorbing resin, mutual interference of oil-absorbing performance, poor polymerization ability, etc., achieve good structural uniformity and wide application range , fast response effect

Inactive Publication Date: 2015-11-11
NORTHEAST FORESTRY UNIVERSITY +2
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Problems solved by technology

Olefin resins are non-polar resins, which have high oil absorption for non-polar oils, but the raw materials for synthesizing the resins are generally synthesized from relatively expensive α-long-chain olefins and long-chain alkyl styrene monomers, and the polymerization ability Poor, difficult to prepare high oil-absorbing resin with excellent oil-absorbing performance
[0003] The structure of high oil-absorbing resin is characterized by a low three-dimensional network chemical cross-linked structure. The design of high oil-absorbing resin usually uses acrylic alkyl resin as raw material, but in actual work, it is found that there is mutual interference between water absorption and oil absorption. phenomenon, there is a problem of water and oil competitive adsorption in the problem of oil pollution caused by oil spills from tankers. This project introduces graft copolymerization of lignin with amorphous hydrophobic structure and polyacrylic acid to change and reduce the three-dimensional network chemical The degree of cross-linking improves the oil absorption efficiency of the resin and the competitive adsorption rate of the resin to oil

Method used

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  • A kind of preparation method of polyacrylate/lignin composite oil-absorbing material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] At 0°C, drop 1wt% triethylamine into the solvent / water mixture solution of 1g lignin, and add an appropriate amount of acryloyl chloride dropwise (the molar ratio of acryloyl chloride to hydroxyl groups in lignin is 2:1) until the system produces the maximum The amount of precipitation was used to complete the reaction, and the lignin acrylate A was obtained by washing three times with absolute ethanol, in which the grafting rate of double bonds was 50.09% (based on lignin hydroxyl content as 100%). Comparison Manual Attached figure 1 Infrared spectra of lignin and lignin acrylate A, analysis of the absorption band of product A at 2400cm-1 to 2900cm-1 is the resonance peak strengthened by the double bond between the benzene ring and the acryloyl group after lignin grafting, proving that the lignin Vegan acrylates have been synthesized.

[0019] Then mix the monomers of A, butyl acrylate and octadecyl acrylate uniformly at a molar ratio of 1:2:1, make a solution of 0.25...

Embodiment 2

[0022] Refer to Example 1 to prepare lignin acrylate A, and then uniformly mix the monomers of A, butyl acrylate and octadecyl acrylate at a molar ratio of 1:3:2, and use deionized water to make 0.25% to 3.0 % (W / V) solution into a 100mL three-necked flask (intermediate indirect reflux condenser), add 3wt% benzoyl peroxide, 7wt% 1,4-butylene dimethacrylate and stir evenly Nitrogen was introduced, and then polymerized at 70° C. for 30 hours. After the polymerization reaction was completed, the freeze-dried product B was washed to obtain polyacrylate / lignin composite oil-absorbing material C (yield 81.5%). The butyl acrylate and stearyl acrylate polymers without lignin acrylate were used as the control sample D to conduct the chloroform adsorption test experiment, and 0.1g of the above-mentioned composite oil-absorbing material C and control sample D were weighed and placed in a 100mL grinding port. Dry the Erlenmeyer flask, add 50mL of distilled water to soak, measure the mass...

Embodiment 3

[0024] Refer to Example 1 to prepare lignin acrylate A, and then uniformly mix the monomers of A, butyl acrylate and octadecyl acrylate at a molar ratio of 1:3:2, and use deionized water to make 0.25% to 3.0 % (W / V) solution was added to a 100mL three-necked flask (intermediate indirect reflux condenser), 3wt% benzoyl peroxide and 7wt% ethylene glycol diacrylate were added and stirred evenly, then nitrogen gas was introduced, and then at 70 Polymerization was carried out at °C for 30 hours. After the polymerization reaction was completed, the freeze-dried product B was washed to obtain polyacrylate / lignin composite oil-absorbing material C (yield 87.88%). The butyl acrylate and stearyl acrylate polymers without lignin acrylate were used as the control sample D to conduct the chloroform adsorption test experiment, and 0.1g of the above-mentioned composite oil-absorbing material C and control sample D were weighed and placed in a 100mL grinding port. Dry the Erlenmeyer flask, a...

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Abstract

The invention relates to a method for preparing a high-oil-absorption material by graft copolymerization of lignin and acrylic alkyl ester. The method comprises the following steps of: preparing lignin acrylate A by lignin and acryloyl chloride extracted in papermaking black liquor, adopting a solution polymerization method to prepare polyacrylate / lignin compound oil-absorbing material C by the lignin acrylate A, acrylic short-chain alkyl ester and acrylic long-chain alkyl ester monomer under the condition of nitrogen atmosphere. The method has the advantages that the copolymerization process is simple, side reaction is less, the treatment process is simple and the energy consumption is low; the prepared polyacrylate / lignin high-rate oil absorbing material has good structure uniformity, can solve the problem of mutual interference between the water absorbing performance and the oil absorbing performance in actual working can be solved, also has the biodegradability of the lignin, so that the difficulty that general oil absorbing material can not be biodegraded is solved and the wide application to sea oil-product pollution caused by oil leakage of a tanker and oil-product recovery in sewage can be achieved.

Description

technical field [0001] The invention relates to a preparation method of a polyacrylate / lignin composite oil-absorbing material, which belongs to the field of functional polymer synthetic materials. Background technique [0002] In the field of environmental protection research, for oil pollution on the sea surface caused by oil spills from tankers, fast, cheap and effective oil-absorbing materials are needed to complete oil adsorption and recovery. High oil-absorbing resins are widely used in environmental protection due to the characteristics of various types of oil absorption, large oil absorption capacity, convenient recycling, and strong oil retention capacity. The resin is mainly divided into two categories: one is alkyl acrylate resin, and the other is olefin resin. Olefin resins are non-polar resins, which have high oil absorption for non-polar oils, but the raw materials for synthesizing the resins are generally synthesized from relatively expensive α-long-chain ole...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F289/00C08H7/00C09K3/32
CPCY02P20/149Y02P20/141
Inventor 马艳丽王慧敏方桂珍李金苑代俊秀赵利利
Owner NORTHEAST FORESTRY UNIVERSITY
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