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Preparation method of waste paper fiber/nanocellulose reinforced polylactic acid-based composite material

A technology of nanocellulose and waste paper fiber, which is applied in the field of composite material preparation, can solve the problems of recycled paper production limitations and low added value, and achieve the effects of avoiding deinking problems, low cost, and achieving cost and performance

Pending Publication Date: 2021-07-20
XIAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the deinking process of digitally printed waste paper involves a deeper understanding of the ink and its interaction with various types of substrates, so although digitally printed waste paper has good fiber quality, it is difficult to use for recycled paper production. Limited, low added value

Method used

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  • Preparation method of waste paper fiber/nanocellulose reinforced polylactic acid-based composite material
  • Preparation method of waste paper fiber/nanocellulose reinforced polylactic acid-based composite material
  • Preparation method of waste paper fiber/nanocellulose reinforced polylactic acid-based composite material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0082] A method of preparing an NCC enhanced PLA-based composite material, which is implemented in accordance with the following steps:

[0083] Step 1, weigh 1.8 g of NCC and 178.2G PLA in the oven, drying, drying time of 8 h, drying temperature is 80 ° C;

[0084] Step 2, the weighing PLA is placed in the mixer, and the time is 1 min. After the PLA is changed from the particulate shape, it is gradually placed in the weighing NCC for kneading, the kneading time is 5 min; The mixed temperature is 170 ° C, and the blend is screened after uniformity; the mass fraction of NCC in the blend is 1%, and the mass fraction of PLA is 99%;

[0085] Step 3, placing the scraped blends in the multifunctional pulverizer for crushing, obtaining a particulate composite, a pulverization time of 1 min;

[0086] Step 4, placing the particulate composite in the oven and dried, the drying time is 4 h, the drying temperature is 80 ° C;

[0087] Step 5, remove the dry composite from the oven to pour into...

Embodiment 2

[0090] A method of preparing an NCC enhanced PLA-based composite material, which is implemented in accordance with the following steps:

[0091] Step 1, 5.4 g of NCC and 174.6 g of PLA were weeded in the oven for drying, the drying time was 8 h, the drying temperature was 80 ° C;

[0092] Step 2, the weighing PLA is placed in the mixer, and the time is 1 min. After the PLA is changed from the particulate shape, it is gradually placed in the weighing NCC for kneading, the kneading time is 5 min; The mixed temperature is 170 ° C, and the blend is scraped off after mixing; the mass fraction of NCC in the blend is 3%, and the mass fraction of the PLA is 97%;

[0093] Step 3, placing the scraped blends in the multifunctional pulverizer for crushing, obtaining a particulate composite, a pulverization time of 1 min;

[0094] Step 4, placing the particulate composite in the oven and dried, the drying time is 4 h, the drying temperature is 80 ° C;

[0095] Step 5, remove the dry composite ...

Embodiment 3

[0098] A method of preparing an NCC enhanced PLA-based composite material, which is implemented in accordance with the following steps:

[0099] Step 1, weigh 9 g of NCC and 171 g of PLA in the oven, drying, drying time of 8 h, drying temperature is 80 ° C;

[0100] Step 2, the weighing PLA is placed in the mixer, and the time is 1 min. After the PLA is changed from the particulate shape, it is gradually placed in the weighing NCC for kneading, the kneading time is 5 min; The mixed temperature is 170 ° C, and the blend is scratched after mixing; the mass fraction of NCC in the blend is 5%, and the mass fraction of the PLA is 95%;

[0101] Step 3, placing the scraped blends in the multifunctional pulverizer for crushing, obtaining a particulate composite, a pulverization time of 1 min;

[0102] Step 4, placing the particulate composite in the oven and dried, the drying time is 4 h, the drying temperature is 80 ° C;

[0103] Step 5, remove the dry composite from the oven to pour int...

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Abstract

The invention discloses a preparation method of a waste paper fiber / nanocellulose reinforced polylactic acid-based composite material. The preparation method is specifically implemented according to the following steps: 1, preparing modified NCC and WF; 2, putting the NCC, the WF and the PLA before and after modification into a drying oven to be dried; 3, putting the dried NCC, WF and PLA before and after modification into a mixing mill to be subjected to melt mixing, and obtaining a blend; 4, crushing the blend to obtain a granular composite material, and drying the granular composite material in a drying oven; and 5, taking out the dried composite material from the oven, pouring the composite material into a vertical injection molding machine for injection molding, and taking out the standard sample after cooling to obtain the NCC / PLA, WF / NCC / PLA or modified WF / NCC / PLA composite material. The preparation process is safe and environment-friendly, the preparation technology is simple, the cost is low, and high-value utilization of the digital printing waste paper is achieved.

Description

Technical field [0001] The present invention belongs to the preparation method of composite material, and is related to the preparation method of waste paper fiber / nanocolytic reinforced polylactic acid group composite. Background technique [0002] With the continuous development of industrial society, non-renewable resources such as petroleum resources and plastic products have been largely consumed, and their inducible environmental issues have brought serious environmental issues. In recent years, people's environmental awareness has gradually strengthened, and the research of composite technology has also made certain progress, and biodegradable composites have attracted the focus of researchers worldwide. [0003] Polylactic acid (PLA) is an ideal biological group degradable polymer material, derived from a renewable resource such as starch, can be completely decomposed to obtain carbon dioxide and water under specific conditions such as composting, combustion to achieve ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L67/04C08L97/02C08L1/04
CPCC08L67/04C08L2205/03C08L2205/16C08L97/02C08L1/04
Inventor 张效林迪静静李佳
Owner XIAN UNIV OF TECH