Fibrous cellulose composite resin and method for producing same

Abstract

Provided are: a fibrous cellulose composite resin having high strength; and a method for producing the fibrous cellulose composite resin. The fibrous cellulose composite resin contains microfiber cellulose in which hydroxyl groups are replaced by urethane groups and washed, the microfiber cellulose is split to have an average fiber width of 0.1 [mu] m or more, and the average fiber width is 0.1 [mu] m or more per 100 parts by mass of the urethane-modified cellulose, a resin, and an acid-modified resin. And the amount of by-products is 10% or less. In addition, the production method comprises: a step in which a cellulose raw material and urea are heat-treated to obtain a urethane-modified cellulose; a step for cleaning the urethane-modified cellulose; a step for splitting the urethane-modified cellulose to obtain a dispersion of urethane-modified microfibrous cellulose having an average fiber width of 0.1 [mu] m or more; a step for mixing the dispersion liquid with an acid-modified resin to obtain a substance containing urethane-modified microfiber cellulose; and a step in which the resin is kneaded with the substance containing the urethane-modified microfiber cellulose to obtain a composite resin.

Description

Technical field [0001] The present invention relates to a fibrous cellulose composite resin and a method of producing thereof. Background technique [0002] In recent years, fine fibers such as cellulose nanofibers, microfibroblasts (microfibrillary cellulose) have received interest in the use of resin reinforcing materials. However, the fine fibers are hydrophilic, relative to it, and the resin is hydrophobic, and thus the fine fibers are used as a resin reinforcing material, and the dispersibility of the fine fibers has a problem. Thus, the inventors have proposed a solution of a hydroxyl group having a fine fiber using a urethane (see Patent Document 1). According to this scheme, the dispersibility of fine fibers is increased, so that the enhancement effect of the resin is improved. However, various studies are still continuing, such as whether the reduction in breaking strains can be suppressed. The reduction in breaking strain can cause rupture or gap of the resin. [0003] ...

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Problems solved by technology

Reduction in breaking strain can lead

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