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Polysiloxane-based polyurethane/lignin elastomer as well as preparation method and application thereof

A polysiloxane-based, polysiloxane technology, which is applied in the field of polysiloxane-based polyurethane/lignin elastomer and its preparation, can solve the problems that have not yet been seen, reduce the mechanical strength of materials, and reduce the polysiloxane phase. Poor tolerance and other problems, to achieve the effect of rich raw materials, good hydrophobicity, and smooth surface

Active Publication Date: 2020-05-19
GUANGZHOU CHEM CO LTD CHINESE ACADEMY OF SCI +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the existing technology only studies polysiloxane-based polyurethane or lignin, and there are often polar hard segment structures and poor compatibility with non-polar polysiloxanes, thereby reducing the mechanical strength of the material. The problem
[0004] At present, there is no relevant research on the preparation of polyurethane materials using polyurethane matrix and lignin as raw materials and their use in the field of biomedicine

Method used

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  • Polysiloxane-based polyurethane/lignin elastomer as well as preparation method and application thereof
  • Polysiloxane-based polyurethane/lignin elastomer as well as preparation method and application thereof
  • Polysiloxane-based polyurethane/lignin elastomer as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0055] (1) Preparation of polysiloxane-based polyurethane / lignin solution

[0056] Mix 1.17g isophorone diisocyanate (IPDI) and dibutyltin dilaurate catalyst (catalyst addition is 2-3 drops), 20mL N,N-dimethylformamide (DMF) and 5g polycarbonate diol (PCDL) was added into a 250mL three-necked flask, the temperature was raised to 60°C, and the mechanical stirrer was stirred at a speed of 500rpm, and the reaction was carried out for 3h to obtain a prepolymer mixed solution; then 1.25g of hydroxyl-capped Terminated polysiloxane was dissolved in 5 mL of DMF, and 0.25% by mass of lignin (the mass fraction of lignin was the percentage of the mass sum of IPDI, PCDL, and PDMS) was added to the above-mentioned PDMS-dissolved solution for ultrasonic treatment for 30 min, and then added The reaction was continued for 3 hours during the reaction. After the reaction, the reaction temperature was lowered to 50° C., and the product (polysiloxane-containing polyurethane / lignin solution contai...

Embodiment 2

[0060] (1) Preparation of polysiloxane-based polyurethane / lignin solution

[0061] Mix 1.17g isophorone diisocyanate (IPDI) and dibutyltin dilaurate catalyst (catalyst addition is 2-3 drops), 20mL N,N-dimethylformamide (DMF) and 5g polycarbonate diol Add it into a 250mL three-necked flask, raise the temperature to 60°C, stir under the action of a mechanical stirrer at a speed of 500rpm, and react for 3h to obtain a prepolymer mixed solution; then add 1.25g of hydroxyl-terminated polysilicon Dissolve oxane in 5 mL of DMF, add 0.5% lignin by mass (the mass fraction of lignin is the percentage of the mass sum of IPDI, PCDL, and PDMS) into the PDMS-dissolved solution for ultrasonic treatment for 30 min, and then add to the reaction to continue After the reaction was completed for 3 hours, the reaction temperature was lowered to 50° C., and the product (polysiloxane-containing polyurethane / lignin solution containing solvent) was removed from the three-necked flask.

[0062] (2) Pr...

Embodiment 3

[0065] (1) Preparation of polysiloxane-based polyurethane / lignin solution

[0066] Mix 1.17g isophorone diisocyanate (IPDI) and dibutyltin dilaurate catalyst (catalyst addition is 2-3 drops), 20mL N,N-dimethylformamide (DMF) and 5g polycarbonate diol Add it into a 250mL three-necked flask, raise the temperature to 60°C, stir under the action of a mechanical stirrer at a speed of 500rpm, and react for 3h to obtain a prepolymer mixed solution; then add 1.25g of hydroxyl-terminated polysilicon Dissolve oxane in 5 mL of DMF, add 1% lignin by mass (the mass fraction of lignin is the percentage of the mass sum of IPDI, PCDL and PDMS) into the PDMS-dissolved solution for ultrasonic treatment for 30 min, and then add to the reaction to continue After the reaction was completed for 3 hours, the reaction temperature was lowered to 50° C., and the product (polysiloxane-containing polyurethane / lignin solution containing solvent) was removed from the three-necked flask.

[0067] (2) Prepa...

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Abstract

The invention discloses a polysiloxane-based polyurethane / lignin elastomer as well as a preparation method and application thereof, and belongs to the technical field of preparation of polyurethane / polysiloxane elastomers. Thepreparation method comprises the following steps: (1) mixing an isocyanate, a catalyst, a polycarbonate diol and an organic solvent to obtain a prepolymer mixed solution; then adding polysiloxane and ligninfor continuous mixing reaction, carrying out cooling treatmentafter the reaction is finished to obtain a polysiloxane-based polyurethane / lignin solution; and (2) carrying out molding treatment on the polysiloxane-based polyurethane / lignin solution to obtain the polysiloxane-based polyurethane / lignin elastomer. According to the invention, the characteristics that lignin is abundant in resource, easily available and renewableare utilized, and a cross-linked structure or filler effect is formed under the action of covalent bonds, so that the polyurethane elastomerhas the characteristics of hydrophobicity, high mechanical strength and cytotoxicity resistance.

Description

technical field [0001] The invention belongs to the technical field of polyurethane / polysiloxane elastomer preparation, in particular to a polysiloxane-based polyurethane / lignin elastomer and its preparation method and application. Background technique [0002] Polyurethane exhibits excellent properties in terms of wear resistance, oil resistance, mechanical properties and elasticity, so polyurethane elastomer materials have been widely used in people's daily life, but due to the properties of polyurethane materials in heat resistance, hydrophobicity, and cell resistance There are still deficiencies in compatibility and other aspects, thus limiting the application fields of polyurethane elastomers. [0003] Polysiloxane has the advantages of good high and low temperature resistance, low surface performance, hydrophobicity, and biocompatibility, and has been paid attention to and used by more and more researchers. In the prior art, there are many methods for introducing poly...

Claims

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Application Information

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IPC IPC(8): C08G18/44C08G18/61C08G18/64C08G18/10
CPCC08G18/4081C08G18/44C08G18/61C08G18/6492C08G18/10C08G18/40
Inventor 吕满庚徐长安屈贞财谭智友吴坤史珺
Owner GUANGZHOU CHEM CO LTD CHINESE ACADEMY OF SCI
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