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Polymer composite

A technology of polymers and composites, applied in filament/thread forming, fiber processing, textiles and papermaking, etc., can solve the problems of limited reinforcement effect, complex and expensive nanocellulose, and achieve improved mechanical properties and excellent mechanical properties Effect

Active Publication Date: 2022-05-17
LG CHEM LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006]However, the process of producing nanocellulose from cellulose fibers is complex and expensive
In addition, there is a problem that cellulose fibers deteriorate due to high temperature during the process of compounding with polymers
In addition, since cellulose fibers and nanocellulose are easily aggregated in polymer composites, it is very difficult to disperse them at the nanoscale, and thus there is a limitation in obtaining sufficient reinforcement

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0089] 1) Preparation of microcellulose fibers containing nanofibrils and fine particles

[0090] Softwood kraft pulp fibers (cellulose fibers) were prepared as cellulose raw materials. Then, the shape of the pulp was observed using a scanning electron microscope ( figure 2 SEM images of ).

[0091] 20 g of the above pulp fiber was added to an aqueous solution in which 20 g of zinc acetate was dissolved in 1000 g of distilled water, and it was stirred at 500 rpm for 2 hours to prepare a mixture. In this mixture, zinc acetate is attached to the swollen pulp fibers via hydrogen or ionic bonds.

[0092] 3.6 g of sodium hydroxide (NaOH) was added to the mixture at room temperature, and it was stirred at 500 rpm for 2 hours to grow fine particles on the pulp fibers. Such as image 3 , Figure 5 (a) and Figure 6 As shown in (a), it was confirmed using a scanning electron microscope that fibrillation occurred in the pulp fiber portion on which particles (ZnO) were grown.

[...

Embodiment 2

[0098] 1) Preparation of microcellulose fibers containing nanofibrils and fine particles

[0099] 20 g of the same pulp fiber as in Example 1 was added to 1 L of a 0.05 M aqueous solution in which 9.08 g (0.05 mol) of copper acetate was dissolved in distilled water, and it was stirred at 500 rpm for 2 hours to prepare a mixture. In this mixture, copper acetate is attached to the swollen pulp fibers through hydrogen or ionic bonds.

[0100] 0.05 mol of benzene-1,3,5-tricarboxylate (BTC) was added to the mixture at room temperature, and it was stirred at 500 rpm for 2 hours to grow fine particles on pulp fibers. Such as Figure 4 Fibrillation in the fraction of pulp fibers on which particles (HKUST-1:Cu-BTC) grew was determined using scanning electron microscopy, as shown in .

[0101] Through the above method, microcellulose fibers comprising nanofibrils and fine particles were obtained.

[0102] 2) Preparation of polymer composites

[0103] 10 wt% of microcellulose fibers ...

Embodiment 3

[0106] Polymer composites and samples were prepared in the same manner as in Example 1, except that the content ratio of microcellulose fibers containing nanofibrils and fine particles, polypropylene, and compatibilizer was changed to 30: 55:15 (by weight %).

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Abstract

The present disclosure relates to polymer composites. According to the present disclosure, provided is a polymer composite capable of exhibiting excellent mechanical properties while being environmentally friendly by containing cellulose fibers as a reinforcing material.

Description

technical field [0001] Cross References to Related Applications [0002] This application claims Korean Patent Application No. 10-2020-0065204 filed with the Korean Intellectual Property Office on May 29, 2020, Korean Patent Application No. 10-2020-0086346 filed with the Korean Intellectual Property Office on July 13, 2020 , Korean Patent Application No. 10-2021-0069785 filed with the Korean Intellectual Property Office on May 31, 2021, Korean Patent Application No. 10-2021-0069786 filed with the Korean Intellectual Property Office on May 31, 2021, and Benefit of Korean Patent Application No. 10-2021-0069787 filed with the Korean Intellectual Property Office on May 31, 2021, the disclosure of which is incorporated herein by reference in its entirety. [0003] The present disclosure relates to polymer composites comprising microcellulose fibers comprising nanofibrils and fine particles. Background technique [0004] Pulp refers to lignocellulosic fibrous material obtained ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L23/12C08L1/02C08K3/22C08L87/00C08L23/00C08L77/00C08L25/06C08L69/00
CPCC08L23/12C08L23/00C08L77/00C08L25/06C08L69/00C08K2003/2296C08L1/02C08K3/22C08L87/00C08K3/08C08J5/005C08L67/02C08J2367/02C08J2401/02C08K7/02C08K9/02C08K9/04D21C9/007D21H11/18D21H17/74D21H21/52D21H17/63C08L101/00C08K3/013C08K2201/005C08K3/36D01D5/423
Inventor 李守熙金仁怜金尤利亚纳全广胜朴珉星
Owner LG CHEM LTD