Nanofiber dispersion, method for producing nanofiber dispersion, powdery nanofibers obtained from dispersion, resin composition including said powdery nanofibers, and molding material for 3D printer in which said resin composition is used

A technology of nanofibers and manufacturing methods, which is applied in the field of modeling materials for 3D printers, can solve the problems of insufficient dispersion of nanofillers and inability to fully exert the functions of nanofillers, and achieve excellent surface smoothness, improved elastic modulus, and improved uniformity Effect

Active Publication Date: 2018-11-09
日本星光工业株式会社
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In this case, the dispersion of the nanofiller is insufficient, and the function of the original

Method used

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  • Nanofiber dispersion, method for producing nanofiber dispersion, powdery nanofibers obtained from dispersion, resin composition including said powdery nanofibers, and molding material for 3D printer in which said resin composition is used
  • Nanofiber dispersion, method for producing nanofiber dispersion, powdery nanofibers obtained from dispersion, resin composition including said powdery nanofibers, and molding material for 3D printer in which said resin composition is used
  • Nanofiber dispersion, method for producing nanofiber dispersion, powdery nanofibers obtained from dispersion, resin composition including said powdery nanofibers, and molding material for 3D printer in which said resin composition is used

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Experimental program
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Effect test

preparation example Construction

[0177]

[0178] The molding material of the present invention is prepared using the dispersion obtained as described above and the (C) resin component.

[0179] In this case, the method for producing the resin composition of the present invention is to knead with (C) the resin component after drying the dispersion mainly composed of (A) nanofibers and (B) dispersant. As a specific example at this time, after freeze-drying, drying under reduced pressure, heat drying or spray drying the dispersion (emulsion or slurry) mainly composed of (A) nanofibers and (B) dispersant, Knead with (C) resin component.

[0180] The drying method of the dispersion, the kneading method of the powdery nanofibers and the (C) resin component, and the blending of other additives are as described above.

[0181]

[0182] The compounding ratio of each component in the molding material of the present invention is in terms of solid content. Usually, (A) nanofibers such as cellulose nanofibers are 0.5...

Embodiment 1～3、 comparative example 1～3

[0201] Using K-2 manufactured by HIROSHIMA METAL & MACHINERY Co., Ltd. as a medialess disperser, the slurry that was dispersed with purified water, cellulose nanofibers, and a dispersant as a dispersion medium was put into the medialess disperser, and was rotated at a peripheral speed of 30 m / s to circulate, promote the dispersion and defibration of cellulose by shearing, and obtain a dispersed and stable cellulose nanofiber dispersion.

[0202] That is, using the above-mentioned apparatus, cellulose nanofibers (BiNFi-s, manufactured by SUGINOMACHINE Co., Ltd.) containing 0.1% by weight and polymethacryloyl oxide at different concentrations (0.004% by weight to 0.01% by weight) as a dispersant The aqueous dispersion of ethyl ethyl phosphorylcholine (LIPIDURE HM, manufactured by NOF Corporation) was repeatedly subjected to 5 times of mediumless dispersion treatment to prepare cellulose nanofiber dispersion, and the ζ-potential and dispersibility were measured, and the sedimenta...

Embodiment 4～6、 comparative example 4～5

[0206] The type of dispersant was changed to polybutyl methacrylate-methacryloyloxyethyl phosphorylcholine (LIPIDURE PMB, manufactured by NOF Corporation), except that it was performed in the same manner as in Example 1 to prepare Cellulose Nanofiber Dispersion. The results are shown in Table 2.

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Abstract

The invention aims to obtain a dispersion in which cellulose nanofibers are dispersed well, powdery cellulose nanofibers obtained by powdering the dispersion, a resin composition in which the powderycellulose nanofibers are blended into a resin, and a molding material for 3D printers in which the resin composition is used. A cellulose nanofiber stable dispersion is obtained by treating a mixture,which includes unmodified cellulose nanofibers and a dispersant, together with water by a high-speed stirring-type medialess disperser, and a composition in which cellulose nanofibers are finely anduniformly dispersed is obtained by powdering the dispersion and blending the same with a resin and a rubber component. In addition, a resin composition having improved mechanical properties and heat resistance, the resin composition being obtained by blending the powdered cellulose nanofibers with a thermoplastic resin or thermosetting resin, is also useful as a molding material for 3D printers.

Description

technical field [0001] The present invention relates to a dispersion in which nanofibers such as cellulose nanofibers are well dispersed, a method for producing the dispersion, powdery nanofibers obtained by drying the dispersion, a resin composition in which the nanofibers are uniformly dispersed, and a method using the dispersion. A resin composition molding material for 3D printers. Background technique [0002] In cellulose, which is naturally abundant biomass, nanofibers are bundled to form a fibrous structure, and function mainly as a strong structural material of plants. In such a structural material of cellulose fibers, the surfaces of the nanofibers are firmly bundled mainly by the bonding force through hydrogen bonds, so it is difficult to disperse the original state of the nanofibers. [0003] Therefore, Patent Document 1 proposes a dispersion of cellulose nanofibers obtained by subjecting a dispersion containing cellulose nanofibers and an anionic dispersant to ...

Claims

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Application Information

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IPC IPC(8): C08J3/05B33Y70/00C08K7/08C08L101/00
CPCC08J3/05C08K7/08C08L101/00B33Y70/00B33Y70/10B82Y30/00C08F130/02C08F220/1804C08F220/1818C08F230/02C08K2201/011C08L1/02C08L7/00C08L23/06C08L23/12C08L43/02C08L67/04C08L2205/16D21H11/18C08L33/00B33Y80/00B82Y40/00C08B15/00C08J2301/02C08K7/02D21H11/20
Inventor 藤桥政人西沢真由美堀内彻河边保雅
Owner 日本星光工业株式会社
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