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CN-116888207-B - Fibrous cellulose-containing material, fibrous cellulose composite resin, and method for producing fibrous cellulose-containing material

CN116888207BCN 116888207 BCN116888207 BCN 116888207BCN-116888207-B

Abstract

The present invention provides a fibrous cellulose-containing material excellent in dispersibility even when dried, a method for producing the same, and a fibrous cellulose composite resin excellent in strength. A fibrous cellulose-containing material added to a resin, the fibrous cellulose having an average fiber width of 0.1 [ mu ] m to 19 [ mu ] m and hydroxyl groups being substituted with urethane groups, the fibrous cellulose-containing material comprising a powder that interacts with the fibrous cellulose. The fibrous cellulose composite resin uses the fibrous cellulose-containing material as the fibrous cellulose. Further, in the method for producing a fibrous cellulose-containing material, a fibrous cellulose in which hydroxyl groups are substituted with urethane groups is opened so that the average fiber width is 0.1 to 19 [ mu ] m, and a powder which interacts with the fibrous cellulose is mixed to obtain a mixed solution, and the mixed solution is dried.

Inventors

  • AOKI RYUNOSUKE
  • Song Moyiji
  • IMAI TAKAAKI

Assignees

  • 大王制纸株式会社

Dates

Publication Date
20260508
Application Date
20220118
Priority Date
20210331

Claims (7)

  1. 1. A fibrous cellulose-containing material to be added to a resin, characterized in that, The fibrous cellulose has a mode diameter of 2-4 [ mu ] m, a fiber length of 0.2-0.6 mm of 14-40%, a fiber length of less than 0.2mm of 8-73%, an average fiber length of 0.18-1.46 mm, and a part or all of hydroxyl groups are substituted with urethane groups, The fibrous cellulose content comprises a powder that interacts with the fibrous cellulose, The powder which is subjected to interaction is acid modified resin, the 90% particle size/10% particle size is 10-93.08, The mixing amount of the interactive powder is 10-900% by mass relative to the fibrous cellulose, The arithmetic standard deviation of the interacted powder is 68.15-503.01 μm, The volume average particle diameter of the powder subjected to the interaction is 50-450 mu m.
  2. 2. The fibrous cellulose product according to claim 1, wherein the volume average particle diameter of the interactive powder/the average fiber length of the fibrous cellulose is 0.005 to 5000, and wherein the volume average particle diameter and the average fiber length are in μm.
  3. 3. The fibrous cellulose product according to claim 1 or 2, wherein the fibrous cellulose has an average fiber length of 1.0mm or less, an average fiber width of 10 μm or less, and a fibrillation rate of 2.5% or more.
  4. 4. The fibrous cellulose product according to claim 1 or 2, wherein the powder having the interaction is an acid-modified resin having an acid value of 2.0% or more.
  5. 5. Fibrous cellulose content according to claim 1 or 2, wherein the interactive powder is maleic anhydride modified polypropylene.
  6. 6. A fibrous cellulose composite resin comprising a fibrous cellulose and a resin mixed together, characterized in that, The fibrous cellulose according to any one of claims 1 to 5.
  7. 7. A method for producing a fibrous cellulose-containing material, characterized in that a fibrous cellulose in which a part or all of the hydroxyl groups are substituted with urethane groups is subjected to fiber opening so that the mode diameter of the fiber width is 2-4 [ mu ] m, the ratio of the fiber length is 0.2-0.6 mm, 14-40%, the ratio of the fiber length is less than 0.2mm, 8-73%, the average fiber length is 0.18-1.46 mm, the fibrous cellulose and the powder that interacts with the fibrous cellulose are mixed so that the mixing amount of the powder that interacts with the fibrous cellulose is 10-900 mass% relative to the fibrous cellulose, the powder that interacts with the fibrous cellulose is an acid-modified resin, the arithmetic standard deviation of the powder that interacts with the fibrous cellulose is 68.15-503.01 [ mu ] m, the particle diameter of the powder that interacts with the fibrous cellulose is 10-93.08%, the arithmetic standard deviation of the powder that interacts with the fibrous cellulose is 50-900 mass% of the fibrous cellulose, The mixture was dried.

Description

Fibrous cellulose-containing material, fibrous cellulose composite resin, and method for producing fibrous cellulose-containing material Technical Field The present invention relates to a fibrous cellulose-containing material, a fibrous cellulose composite resin, and a method for producing a fibrous cellulose-containing material. Background In recent years, the use of microfibers such as cellulose nanofibers and microfibrillated cellulose (microfibrillated cellulose) has been attracting attention as a resin reinforcing material. However, since the microfibers are hydrophilic, and the resin is hydrophobic, when the microfibers are used as a resin reinforcing material, dispersibility of the microfibers is problematic. Accordingly, the present inventors have proposed a method of substituting a hydroxyl group of a microfiber with a urethane group (see patent document 1). According to this embodiment, dispersibility of the microfibers is improved, and thus the reinforcing effect of the resin is improved. However, since the fine fibers agglomerate during drying, the agglomeration is strong, and therefore, when the dried fine fibers are used as a reinforcing material for resins, there is a problem in terms of dispersibility. Prior art literature Patent literature Patent document 1 Japanese patent application laid-open No. 2019-1876 Disclosure of Invention Problems to be solved by the invention The main object to be solved by the present invention is to provide a fibrous cellulose-containing material excellent in dispersibility even when dried, a method for producing the same, and a fibrous cellulose composite resin excellent in strength. Means for solving the problems In the conventional developments, for example, the developments of the patent documents mentioned above, the main focus is on the dispersibility of the microfibers when the microfibers are held in the state of a dispersion, and it has been found that the introduction of urethane (urethanization) is excellent in many modification methods such as esterification, etherification, amidation, vulcanization, and the like. In contrast, the present invention has been made mainly with an object of finding that the above problems can be solved by pursuing other substances and physical properties to be used together with the microfibers in the course of various experiments on the premise of introducing urethane, in view of dispersibility of the microfibers when the microfibers are mixed with a resin after the microfibers are dried temporarily or the like, and has been made. The means thus conceived are as follows. (Means described in scheme 1) A fibrous cellulose-containing material to be added to a resin, characterized in that, The fibrous cellulose has an average fiber width of 0.1 to 19 μm, and a part or all of the hydroxyl groups are substituted with urethane groups, The fibrous cellulose-containing material contains a powder that interacts with the fibrous cellulose. (Means described in scheme 2) The fibrous cellulose product according to claim 1, wherein the interaction powder has a 90% particle diameter/10% particle diameter of 2 to 1000. (Means described in scheme 3) The fibrous cellulose-containing material according to claim 1 or 2, wherein the volume average particle diameter of the powder for interaction is 0.01 μm to 10000 μm, and the volume average particle diameter (μm) of the powder for interaction/the average fiber length (μm) of the fibrous cellulose is 0.005 to 5000. (Means described in scheme 4) The fibrous cellulose product according to any one of the aspects 1 to 3, wherein the fibrous cellulose has a fiber length of less than 0.2mm of 5% or more and a fiber length of 0.2mm to 0.6mm of 10% or more. (Means described in scheme 5) The fibrous cellulose product according to any one of claims 1 to 4, wherein the fibrous cellulose has an average fiber length of 1.0mm or less, an average fiber width of 10 μm or less, and a fibrillation rate of 2.5% or more. (Means described in scheme 6) The fibrous cellulose product according to any one of the aspects 1 to 5, wherein the powder having the interaction is an acid-modified resin having an acid value of 2.0% or more. (Means described in scheme 7) The fibrous cellulose-containing material according to any one of the above-mentioned aspects 1 to 6, wherein the powder for interaction is maleic anhydride-modified polypropylene. (Means as described in scheme 8) A fibrous cellulose composite resin comprising a fibrous cellulose and a resin mixed together, characterized in that, The fibrous cellulose-containing material according to any one of the aspects 1 to 7, which is used as the fibrous cellulose. (Means as described in scheme 9) A method for producing a fibrous cellulose-containing material, characterized in that a fibrous cellulose in which a part or all of the hydroxyl groups are substituted with urethane groups is opened so that the average fiber width is 0.1-19 [ mu ] m, and a powder which interact