Modified microfibrillated cellulose and resin composite material comprising the same

一种纤维素、树脂组合物的技术，应用在改性微纤化纤维素及含有其的树脂组合物及树脂复合材料领域，能够解决亲水性性质残留、凝聚·凝结、羟基残留等问题，达到防止凝聚、反应性优异、提高断裂韧性的效果

Active Publication Date: 2012-09-12
DIC CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, such modified microfibrillated cellulose has the following problems: the hydroxyl group on the surface remains and the hydrophilic property remains, which leads to insufficient dispersion in the organic solvent, and aggregation and coagulation occur when it is injected into the resin. Or the mechanical properties of the resin cannot be improved even if it is mixed with the resin
However, for this material, the surface treatment agent is a low-molecular-weight monomer that acts as a silane coupling agent. Therefore, in order to improve the mechanical properties of the composite resin, if a large amount of silane coupling agent is not bonded to the surface of the microfibrillated cellulose , it will not show its expected function
When trying to bind more silane coupling agents to the surface of microfibrillated cellulose, there is a problem that the polycondensation reaction between silane coupling agents occurs as a side reaction during surface treatment and cannot be effectively treated.

Method used

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  • Modified microfibrillated cellulose and resin composite material comprising the same

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Embodiment

[0076] The present invention will be described in further detail below using examples. In addition, "part" and "%" in the text represent mass or weight basis.

Synthetic example 1

[0077] Synthesis Example 1

[0078] Weigh 468g of xylene and put it into a 3L stainless steel separable flask. It heated to 100 degreeC, stirring at 120 rpm under nitrogen flow. Next, 315 g of 2-ethylhexyl acrylate, 280 g of glycidyl methacrylate, and 105 g of SZ6030 (TORAY·DOWCORNING) were weighed into a 1L stainless steel container and stirred with a glass rod. Thereafter, 105 g of xylene and 84 g of Perbutyl O (NOF Corporation) were added and fully stirred and mixed with a glass rod. This mixed solution was transferred to a 1 L dropping funnel, and added dropwise to xylene heated to 100° C. over 4 hours. After the dropwise addition, the solution was kept at 100° C. for 7 hours to perform polymerization. The polymerized acrylic resin is referred to as a hydrolyzable silyl group-containing acrylic resin (I). Weigh 1 g of hydrolyzable silyl group-containing acrylic resin (I), add 5 g of toluene / methanol mixed solution (7 / 3 weight ratio) and stir, and place in a dryer at 1...

Embodiment 1

[0107] Add 1.9 g of 6% hydrochloric acid aqueous solution and 15 g of dimethylformamide to 33.3 g of hydrolyzable silyl acrylic resin (I), and stir with a stirrer for 1 hour to make the methoxy of hydrolyzable silyl acrylic resin (I) Silane hydrolysis. 20.6 g of dry microfibrillated cellulose and 132.8 g of xylene were added to this resin solution, and the mixture was stirred at 50 rpm for 6 hours with TK HIVISMIX f model (Tokuki Kagaku Kogyo) while heating to 80°C. Take 10 g of the modified microfibrillated cellulose resin mixture, add 80 g of xylene, and stir for 10 minutes with TK HOMODISPER of TK ROBOMIX at 3000 rpm. Thereafter, the solvent was removed by suction filtration, and the modified microfibrillated cellulose was washed. This washing operation was performed again with xylene, and thereafter, washing was performed twice by changing the washing solvent to ethanol. The resulting modified microfibrillated cellulose / ethanol slurry had a solids content of 22%. 8.6 pa...

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Abstract

Provided is a modified microfibrillated cellulose, and also provided are a resin composition and resin composite material comprising the modified microfibrillated cellulose. The modified microfibrillated cellulose is obtained as a result of hydrolysable silyl group-containing resin (A) bonding or adsorbing to the surface of cellulose, and the modified microfibrillated cellulose has a silicon atom content of 0.01% to 0.5% in terms of the number of atoms. Furthermore, the resin composition comprises 0.1 to 10 wt% of the modified microfibrillated cellulose.

Description

technical field [0001] The present invention relates to a modified microfibrillated cellulose capable of obtaining a molded product excellent in miscibility with resin, mechanical properties of a resin molded product, especially fracture toughness, a resin composition and a resin composite material containing the same. Background technique [0002] For the cell walls of all plants, high-strength nanofibers with a width of about 4 nm called microfibrillated cellulose form the basic framework. Microfibrillated cellulose is nanofibers composed of extremely elongated chain crystals obtained by defibrating plant fibers such as pulp to the level of microfibrillated cellulose. In addition, microfibrillated cellulose derived from bacteria (mainly acetic acid bacteria) is also known, and nata de coco is widely known as a food using it. It is known that microfibrillated cellulose can generally be produced by pulverizing and beating cellulose-based fibers with a homogenizer, a homogen...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08B15/05
CPCC08B15/05C08L1/02C08L2205/16C08J5/045C08J5/06C08L33/14C08F8/12C08F220/1808C08F220/325C08L101/10C08F230/085C08L1/08
Inventor 滨田健一原田哲哉
Owner DIC CORP
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