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Condensed tannin-containing composition which is cured by application of heat and pressure

A composition and condensation-type technology, which is applied in the field of manufacturing shaped bodies, can solve the problems such as the inability to use the main components of non-fossil resource-derived materials, and achieve the effects of simple manufacturing process, high widely usability, and high safety

Inactive Publication Date: 2014-03-26
KYOTO UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The invention related to Patent Document 1 is excellent in that a plastic-like molded body can be obtained without using fossil resource-derived substances, but it cannot use non-fossil resource-derived substances other than plant-derived substances as main components, so there is a problem in wide applicability. question

Method used

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  • Condensed tannin-containing composition which is cured by application of heat and pressure
  • Condensed tannin-containing composition which is cured by application of heat and pressure
  • Condensed tannin-containing composition which is cured by application of heat and pressure

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0076] [Example 1] Curing experiment

[0077] Using cellulose filter paper powder (consisting almost 100% of cellulose) as a component, prepared vitex tannin (in the table, denoted as tannic acid ME) as a condensed tannin, and oligosaccharide (sucrose) Composition (Sample 1). In addition, a composition was prepared by adding lignin and sucrose without adding condensed tannin to the cellulose filter paper powder (sample 2). In addition, a composition (sample 3) in which only condensed tannins were added to the cellulose filter paper powder was prepared. Furthermore, a composition (sample 4) in which hydrolyzable tannin (gala tannin) and sucrose were added to acacia wood powder (which hardly contained condensed tannin) was prepared.

[0078] These compositions were heated and pressurized under the conditions shown in Table 1 to form molded bodies, and water resistance was evaluated. The results are shown in Table 1.

[0079] [Table 1]

[0080]

[0081] As shown in Table ...

Embodiment 2

[0083] [Example 2] Research on the weight ratio of condensed tannins and monosaccharides / oligosaccharides

[0084] Using cellulose filter paper powder, wattle tannin, and sucrose, various compositions having different mixing ratios were prepared, molded products were produced under the conditions shown in Table 2, and water resistance was evaluated. The results are shown in Table 2. The ratios of condensed tannins and sucrose reported in the tables are weight ratios.

[0085] [Table 2]

[0086]

[0087] As shown in Table 2, all compositions in which the weight ratio of sucrose to condensed tannin 1.0 was in the range of 0.2 to 5.0 were cured by heating and pressing to obtain plastic-like molded articles. In particular, a composition having a weight ratio of condensed tannin 1.0:sucrose 0.5 to 1.0 is excellent in water resistance.

Embodiment 3

[0088] [Example 3] Study on the content rate of condensed tannins and monosaccharides / oligosaccharides

[0089] Using cellulose filter paper powder, wattle tannin, and sucrose, the composition was prepared in such a way that the content of wattle tannin or sucrose reached 10% by weight or 50% by weight, and hot pressing was carried out under the conditions shown in Table 3, Water resistance was evaluated. The results are shown in Table 3.

[0090] [table 3]

[0091] Table 3 Research on the content rate of condensed tannins and monosaccharides / oligosaccharides

[0092]

[0093] As shown in Table 3, all the compositions were cured by heating and pressing to become plastic-like molded objects. In addition, the weight reduction rates after the boiling treatment were all 25% or less. From this, it can be seen that even if the content of wattle tannin or sucrose is varied between 10% and 50% by weight, a plastic-like molded article can be obtained.

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Abstract

The present invention addresses the problem of providing: a composition which is capable of forming a biomass material with low energy consumption by simple processes and simple facilities; a molded body which is obtained from the composition; and a method for producing the molded body. A composition of the present invention is a composition which is cured by the application of heat and pressure and which is characterized by containing an element that is powdered or broken into small pieces, 8% by weight or more of condensed tannin and 8% by weight or more of a sugar that is selected from the group consisting of monosaccharides and oligosaccharides. Sucurose, glucose, fructose, maltose, xylose or lactose is preferable as the above-mentioned sugar. It is also preferable that the composition additionally contains an acid catalyst.

Description

technical field [0001] The present invention is a composition that can be used as a raw material for a molded body and an adhesive, and relates to a composition that does not require fossil resources, a molded body containing the composition, and a method for producing the molded body. Background technique [0002] In recent years, in order to prevent global warming and suppress the consumption of fossil resources, so-called bioplastics produced from biological resources have been actively developed instead of resins produced from fossil resources. Various raw materials such as polylactic acid have been studied, but in order to ensure sufficient performance, it is necessary to chemically modify compounds derived from fossil resources and use agents equivalent to poisonous or highly toxic substances. According to such a development method, even if it is possible to manufacture materials with reduced environmental impact, it is difficult to manufacture safe bioplastics compose...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L93/00B27N3/00C08K5/1545C09J11/00C09J105/00C09J171/10
CPCC08K5/1545C09J105/00C08L97/005C08L5/00C09J197/005C08B37/00C08L1/02C08H6/00C08L97/02
Inventor 梅村研二
Owner KYOTO UNIV
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