Polyolefin/enzymatic-hydrolyzed lignin composite material and preparation method thereof

A technology for enzymatic hydrolysis of lignin and composite materials, applied in the field of polyolefin/enzymatic hydrolyzed lignin composite materials and their preparation, can solve the problems of complex steps, poor compatibility, poor mechanical properties of composite materials, etc., and improve toughness. and elastic modulus, excellent biodegradability, and the effect of improving compatibility

Inactive Publication Date: 2013-07-31
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the difference in polarity, the compatibility between the two is not good, and the mechanical properties of the prepared composite material are poor.
The existing method of adding coupling agent, compatibilizer and chemical modification to improve the compatibility of lignin and polyolefin plastics has limitations, it is difficult to effectively improve the mechanical properties of composite materials, and the steps are complicated and the preparation cost High, difficult to achieve industrialization

Method used

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  • Polyolefin/enzymatic-hydrolyzed lignin composite material and preparation method thereof
  • Polyolefin/enzymatic-hydrolyzed lignin composite material and preparation method thereof
  • Polyolefin/enzymatic-hydrolyzed lignin composite material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] (1) 100 grams of dried enzymatic lignin is crushed to obtain enzymatic lignin powder with a particle size of about 10 microns, and then 5 grams of polyethylene wax plasticizer is added to the enzymatic lignin powder to mix the two uniform, and then placed in an oven, treated at 60° C. for 15 hours to obtain dry enzymatic lignin pretreatment powder.

[0036] (2) 100 grams of the obtained enzymatic lignin pretreatment powder was mixed with 100 grams of injection-molded polypropylene pellets (PPK1008, Yanshan Petrochemical) and 150 grams of high-density polyethylene pellets, and then physically blended at 130°C , during the blending process, 10 grams of stearic acid and 30 grams of nano-calcium carbonate lubricant were added, and after 10 minutes of blending treatment, the cake was formed to obtain a polyolefin / enzymatic lignin composite material.

Embodiment 2

[0038] (1) After crushing 100 grams of dried enzymatic lignin to obtain enzymatic lignin powder with a particle size of about 100 microns, add 5 grams of maleic anhydride grafted polyethylene and 5 grams of palm to the enzymatic lignin powder Wax plasticizer, the three are mixed evenly, and then placed in an oven, treated at 70°C for 20 hours to obtain dry enzymatic lignin pretreatment powder.

[0039] (2) Mix 100 grams of the obtained enzymatic lignin pretreatment powder with 100 grams of low-density polyethylene pellets, then physically blend at 160° C., and add 20 grams of stearic acid during the blending process Calcium and 30 grams of 1000-mesh calcium carbonate powder lubricant, after blending for 15 minutes, the cake can be formed to obtain polyolefin / enzymolysis lignin composite material.

Embodiment 3

[0041] (1) 100 grams of dried enzymatic lignin is pulverized to obtain enzymatic lignin powder with a particle size of about 20 microns, and then 5 grams of dibutyl phthalate and 10 grams of cyclohexanol are added to the enzymatic lignin powder. Oxygenated soybean oil plasticizer, the three are mixed evenly, and then placed in an oven, treated at 85° C. for 18 hours to obtain dry enzymatic lignin pretreatment powder.

[0042] (2) Mix 100 grams of the obtained enzymatic lignin pretreatment powder with 200 grams of high-density polyethylene pellets, then physically blend at 150° C., and add 15 grams of stearic acid during the blending process Zinc and 45 grams of 500 mesh calcium carbonate powder lubricants, after blending for 20 minutes, the cake can be formed to obtain a polyolefin / enzymolysis lignin composite material.

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Abstract

The invention discloses a polyolefin / enzymatic-hydrolyzed lignin composite material and a preparation method thereof. According to the method, a dried raw material enzymatic-hydrolyzed lignin is crushed, such that enzymatic-hydrolyzed lignin powder is obtained; a plasticizer is added, and the mixture is well mixed; the mixture is processed for 12-24h under a temperature of 60-90 DEG C in a baking oven; the obtained enzymatic-hydrolyzed lignin pretreated powder is mixed with polyolefin particles; physical blending is carried out under a temperature of 120-160 DEG C; and a lubricant is added, and blending is carried out. According to the mass, the application amounts of the enzymatic-hydrolyzed lignin, polyolefin plastic, the plasticizer, and the lubricant are respectively 100 parts, 100-400 parts, 5-20 parts, and 40-100 parts. According to the invention, enzymatic-hydrolyzed lignin with wide source and low cost is adopted as the raw material. The prepared polyolefin / enzymatic-hydrolyzed lignin composite material has good comprehensive mechanical properties such as tensile strength, elongation at break, and the like. Also, the material has low density, and is antioxidant and degradable.

Description

technical field [0001] The invention relates to a polyolefin resin composite material, in particular to a polyolefin / enzymolysis lignin composite material and a preparation method thereof. Background technique [0002] Polyolefin resin is the most produced variety among synthetic resins, among which polyethylene and polypropylene are the main ones, and are used in every corner of the national economy. Polyethylene resin accounts for about 38% of the global production of general-purpose plastics. my country has a huge demand for polyethylene plastics. The annual domestic production and usage are showing an increasing trend. In 2011, the output of polyethylene plastics in my country exceeded 10 million tons. [0003] Polyolefin resins are derived from non-renewable petrochemical resources. Under the circumstances that petrochemical resources are gradually depleted and environmental pressure is increasing, it has become a world development trend to search for renewable biomass ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L23/06C08L23/12C08L97/00C08H7/00
Inventor 邱学青周明松杨东杰黄锦浩楼宏铭庞煜霞孙章建
Owner SOUTH CHINA UNIV OF TECH
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