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A kind of starch composite film material and preparation method thereof

A kind of starch composite film and starch technology, applied in the field of starch composite film, can solve the problems of immature technology and achieve the effect of improving application performance, good practicability and improving hydrophobic performance

Active Publication Date: 2021-11-16
NANJING FORESTRY UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there are few studies on improving the hydrophobic properties of starch films by physical methods, and the technology is immature.

Method used

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  • A kind of starch composite film material and preparation method thereof
  • A kind of starch composite film material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] (1) Weigh 1g of formic acid lignin, dissolve it in 200mL tetrahydrofuran (THF), stir it with magnetic force (300rpm) to make it evenly dispersed and transfer it to the dialysis bag (M w =8000), using deionized water dialysis for 3 days to prepare formic acid nano lignin.

[0021] (2) Weigh the formic acid nano-lignin of 1% relative to the starch mass, and add polyvinyl alcohol (PVA) with the starch mass ratio of 1:10, 3:10, 1:2 and 1:1 into the beaker, and then pour Put it into 10g of 1% cornstarch liquid gelatinized in advance, place it on a constant temperature magnetic stirrer at 90°C, stir for 10min (400rpm), and ultrasonicate for 10min, with ultrasonic power of 100W, to disperse the formic acid nano-lignin evenly.

[0022] (3) After heating, in order to eliminate the mass loss caused by water evaporation, recalculate the starch solid content in (2), measure 6±1mL of starch liquid corresponding to the volume of 0.2g starch, and transfer it to a petri dish with a dia...

Embodiment 2

[0025] (1) Weigh 1g of formic acid lignin, dissolve it in 200mL tetrahydrofuran (THF), stir it with magnetic force (300rpm) to make it evenly dispersed and transfer it to the dialysis bag (M w =8000), using deionized water dialysis for 3 days to prepare formic acid nano lignin.

[0026] (2) Weigh the formic acid nano-lignin of 3% relative to the starch mass, and add polyvinyl alcohol (PVA) with the starch mass ratio of 1: 10, 3: 10, 1: 2 and 1: 1 into the beaker, and then pour Put it into 10g of 1% cornstarch liquid gelatinized in advance, place it on a constant temperature magnetic stirrer at 90°C, stir for 10min (400rpm), and ultrasonicate for 10min at a power of 100W to disperse the nano lignin evenly.

[0027] (3) After heating, in order to eliminate the mass loss caused by water evaporation, recalculate the starch solid content in (2), measure 6±1mL of starch liquid corresponding to the volume of 0.2g starch, and transfer it to a petri dish with a diameter of 6cm The sta...

Embodiment 3

[0030] (1) Weigh 1g of formic acid lignin, dissolve it in 200mL tetrahydrofuran (THF), stir it with magnetic force (300rpm) to make it evenly dispersed and transfer it to the dialysis bag (M w =8000), using deionized water dialysis for 3 days to prepare formic acid nano lignin.

[0031] (2) Weigh the formic acid nano-lignin of 1% relative to the starch mass, and add polyethylene oxide (PEO) with the starch mass ratio of 1:10, 3:10, 1:2 and 1:1 into the beaker, and then Pour it into 10g of 1% cornstarch liquid gelatinized in advance, place it on a constant temperature magnetic stirrer at 90°C, stir for 10min (400rpm), and ultrasonicate for 10min at a power of 100W to disperse the nano lignin evenly.

[0032] (3) After heating, in order to eliminate the mass loss caused by water evaporation, recalculate the starch solid content in (2), measure 6±1mL of starch liquid corresponding to the volume of 0.2g starch, and transfer it to a petri dish with a diameter of 6cm The starch com...

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Abstract

The invention discloses a starch composite membrane material and a preparation method thereof. In the preparation method, the mixture of formic acid nano-lignin and polyvinyl alcohol, the mixture of formic acid nano-lignin and poly(ethylene oxide) are uniformly dispersed in the starch liquid, and then left in a constant temperature and humidity environment to obtain hydrophobic properties. Significantly improved starch composite film material; the quality of formic acid nano lignin is 1%-3% of starch, and the mass ratio of polyvinyl alcohol or polyethylene oxide to starch is (1-10):10. In the present invention, the lignin obtained after formic acid pulping is made into a nanometer level, and then compounded with starch to prepare a starch composite film material, which can significantly improve its hydrophobic performance through tests, realize high-value utilization of formic acid lignin, and improve starch The application performance of the composite film provides technical support for the preparation of highly hydrophobic starch / polyvinyl alcohol or starch / polyethylene oxide composite materials using formic acid nano-lignin dispersion technology, and has good practicability.

Description

technical field [0001] The invention belongs to the technical field of starch composite membranes, and in particular relates to a starch composite membrane material and a preparation method thereof. Background technique [0002] The long-lasting and durable properties of traditional petroleum-based plastics make them ideal materials for packaging, coatings, construction and hygiene. However, fossil materials are not easily biodegradable, and the accumulation of their waste in the environment poses a serious threat to human health. It is this enhanced awareness of environmental protection that makes the research of natural raw materials such as starch, cellulose, and protein as substitutes for non-renewable biodegradable materials gaining increasing attention. Currently, due to the low cost of starch and its abundant availability worldwide, researchers are interested in the study of starch materials in the fields of food, paper and textile. Among them, starch / polyvinyl alco...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08J5/18C08L3/02C08L29/04C08L97/00
CPCC08J5/18C08J2303/02C08J2329/04C08J2429/04C08J2497/00
Inventor 戴红旗倪书振杨文恒宋红霞杨益琴吴伟兵
Owner NANJING FORESTRY UNIV