JP2006069802A - Inorganic silicon compound/organic composite nanosheet, its producing method, and method for swelling layered silicon compound/organic composite - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an inorganic/organic composite nanosheet and a method for producing the same, and to provide a method for swelling a layered silicon compound/organic composite in which an inorganic part and an organic part are bonded by a covalent bond. <P>SOLUTION: The inorganic/organic composite nanosheet has such a sheet-like shape that the length of two sides among three sides are 0.1-2 μm respectively, the length of other side is 1-3 nm, and the thickness is of a nanometerorder, includes the inorganic part and the organic part bonded by the covalent bond, and is expressed by general formula: R<SB>h</SB>M<SB>6/i</SB>Si<SB>j</SB>O<SB>k</SB>(OH)<SB>l</SB>(wherein, R is an organic group; M is at least one kind of element selected from Mg, Al, and Fe; 0.1≤h≤1; i is valence of the element M; 2≤j≤4; 6≤k≤10; and 2≤l≤6). The inorganic part has a structure similar to a 2:1-type layered clay mineral, in which the elements M form an octahedral sheet which is sandwiched by two tetrahedral sheets formed of Si. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

The present invention relates to an inorganic / organic composite nanosheet, a method for producing the same, and a method for swelling a layered silicon compound / organic composite. More specifically, the present invention relates to a method for producing an inorganic / organic composite nanosheet made possible by peeling off a layered silicon compound / organic composite in which an inorganic part and an organic part are covalently bonded.

Many intercalation compounds in which an organic substance is introduced by intercalation reaction between layers of inorganic layered compounds such as clay minerals have been reported. A layered organosilicon polymer (Patent Document 1) in which an organic part and an inorganic part are combined through a robust joint such as a covalent bond, and a thermoplastic layered alkylsiloxane invented by the present inventors (Patent Document 2) are also available. It is known.

In addition, a method for producing a nanosheet by peeling a layered compound such as a layered titanate is already known (for example, Patent Documents 3 and 4 and Non-Patent Document 1). In recent years, development of a large number of layered oxide nanosheets has been promoted due to the widespread expectation of development of new materials using nanosheets.

Japanese Patent Laid-Open No. 06-200034 JP 2004-107494 A JP 09-175816 A Japanese Patent Laid-Open No. 10-087320 J. Am. Chem. Soc., 1996, 118, 8329

If the layered inorganic / organic composite can be made into a nanosheet in the same manner as the inorganic layered compound, it can be expected to exert a great ripple effect on the development of new materials. In addition, development of lipophilic nanosheets has been awaited for purposes such as use as a filler for organic general-purpose resins and paints, and for the production of thin films on lipophilic substrates.

However, it is useless to simply apply the above-described method for obtaining nanosheets from inorganic layered compounds to the production of inorganic / organic composite nanosheets. This is because when the layered inorganic / organic composite is peeled off and separated to the nano level, and finally separated into a single layer, it is naturally separated into an inorganic substance and an organic substance. The object is no longer an inorganic / organic composite nanosheet, but merely a mixture of inorganic nanosheet and organic material.

In consideration of the practical use of the soot from which the inorganic / organic composite nanosheet was obtained, if not only the method for producing the nanosheet but also the swelling treatment method is disclosed, the swelling state, further inorganic / The continuous state with the organic composite nanosheet can be freely selected according to the application, which is very convenient. With respect to swelling, it is known that many of layered clay mineral / organic composites swell in organic solvents. However, in order to improve the convenience of the inorganic / organic composite nanosheet of the present invention, it is necessary to provide a swelling treatment method for a layered composite in which an inorganic portion and an organic portion are firmly bonded by a covalent bond. However, the latter processing method is not yet known.

Therefore, the present invention eliminates the problems of the prior art as described above, provides an inorganic / organic composite nanosheet and a method for producing the same, and further, a layered silicon compound / organic composite in which an inorganic part and an organic part are bonded by a covalent bond It is an object to provide a body swelling treatment method.

As a result of intensive studies to solve such problems, the present inventors have found that a method of applying a layered inorganic / organic composite in which an organic part and an inorganic part are combined through a strong joint such as a covalent bond is effective. I found something. In other words, as described above, most of the layered inorganic / organic composites, even if the method of obtaining the inorganic nanosheet is applied, eventually becomes a simple mixture of the inorganic nanosheet and the organic material, but both are robust through covalent bonds. I realized that this is not the case for composites with complex interfaces. As described above, a plurality of compounds are already known as the complex via the corresponding covalent bond.

The conditions for the complex used in the present invention are as follows. 1. The organic part and the inorganic part have a robust interface through a covalent bond. 2. High affinity for the solvent used for nanosheet formation. It is stable under nanosheet forming operation conditions. It has been found that it is optimal to use a composite already developed by the present inventors (for example, Patent Document 2; JP-A-2004-107494) as a layered inorganic / organic composite satisfying these conditions.

As a method for forming a nanosheet, 1. 1. It is simpler. 2. No expensive equipment is used. It was considered that a nanosheet forming method with a wider application range can be provided if it is performed under mild conditions such as near room temperature, normal pressure, and not using a highly active reagent.

Further, as the swelling treatment method, a method that can be continuously performed with nanosheets is more desirable. For example, it is very convenient if the process from the swollen state to the nanosheet can be carried out as a series of processes only by changing the mixing ratio of the solvent in the same solvent and container.

The method satisfying the above conditions succeeded in obtaining an inorganic / organic composite nanosheet as shown below, while maintaining the bond between the inorganic part and the organic part of the layered silicate / organic composite and the layered organosiloxane. It has succeeded in swelling.

That is, according to the present invention, first of all, two of the three sides are 0.1 to 2 μm and the remaining one is 1
It is a nano-order sheet shape with a thickness of ˜3 nm, and an inorganic part and an organic part are covalently bonded, and the composition is represented by the general formula R _h M _{6 / i} Si _j O _k (OH) _l ( Here, R represents an organic group, M represents at least one element of Mg, Al, and Fe, 0.1 ≦ h ≦ 1, i represents the valence of the element M, 2 ≦ j ≦ 4, 6 ≦ k ≤ 10, 2
<= L <= 6 is shown. An inorganic / organic composite nanosheet represented by:

Second, a composition in which a part of M in the general formula R _h M _{6 / i} Si _j O _k (OH) _l is substituted with at least one element of alkali metal is R _h (M _{( 6 / im)} L _m ) Si _j O _k (OH) _l (wherein L represents at least one element of alkali metal and provides an inorganic / organic composite nanosheet represented by 0.005 ≦ m ≦ 1) To do.

Third, according to the first and second inventions, there is provided an inorganic / organic composite nanosheet characterized in that R is a propyloctadecyldimethylammonium group.

Fourth, the present invention is a sheet of nano-order thickness in which two of the three sides are 0.1 to 2 μm and the remaining one side is 0.5 to 5 nm, and the organic group and siloxane The moiety is covalently bonded, and the composition is represented by the general formula [R ′ _n Si _p O _q (OJ) _r ] _s (where R ′ represents an organic group, J is H, Si, or in solution or suspended) Indicates a group that can easily convert an OJ group to an OH group in liquid, 0.5 ≦ n ≦ 2, 1.5 ≦ p ≦ 3, 2.5 ≦ q
≦ 4, 1 ≦ r ≦ 2.5, 2 ≦ s ≦ 200)). Examples of the group that can easily convert the OJ group into an OH group in a solution or suspension include a group that changes into an OH group by a ligand exchange reaction or the action of a catalyst, such as an alkoxy group.

Further, fifthly, the inorganic / organic composite nanosheet according to the fourth invention, wherein the organic group of the inorganic / organic composite nanosheet is an octadecyl group or a hexadecyl group.

Further, according to the present invention, sixthly, the composition has a general formula of R _h M _{6 / i} Si _j O _k (OH) _l or R _h (M _{(6 / im)} L
_m ) Si _j O _k (OH) _l (where R is an organic group, M is at least one element of Mg, Al, and Fe, L is at least one element of an alkali metal, 0.1 ≦ h ≦ 1, i is the valence of element M, 2 ≦ j ≦ 4
6 ≦ k ≦ 10, 2 ≦ l ≦ 6, 0.005 ≦ m ≦ 1. And the layered silicate / organic complex in which the silicate portion and the organic portion are covalently bonded to each other and peeled by the action of an organic solvent. / Providing a method for producing an organic composite nanosheet.

Further, seventhly, the present invention is to swell the layered silicate / organic composite by applying an organic solvent before peeling off the layered silicate / organic composite by applying an organic solvent. The sixth method for producing an inorganic / organic composite nanosheet is provided.

Eighth, the present invention relates to a composition of the general formula [R ′ _n Si _p O _q (OJ) _r ] _s (where R ′ represents an organic group, J is H, Si, or in solution). Or a group that can be easily converted into an OH group in a suspension, 0.
5 ≦ n ≦ 2, 1.5 ≦ p ≦ 3, 2.5 ≦ q ≦ 4, 1 ≦ r ≦ 2.5, and 2 ≦ s ≦ 200)). The method for producing an inorganic / organic composite nanosheet according to 4 or 5 is provided.

Ninthly, the present invention relates to the eighth inorganic / organic composition, wherein the organic solvent is allowed to act on the layered organosiloxane and the layered organosiloxane is swollen before the layered organosiloxane is peeled off. A method for producing a composite nanosheet is provided.

The tenth aspect of the present invention is a manufacturing method in which toluene is used as the organic solvent in any one of the sixth to ninth manufacturing methods, and the eleventh aspect is that the organic solvent acts at room temperature. A manufacturing method is provided.

In the twelfth aspect, the present invention relates to a layered silicate / organic compound by causing an organic solvent to act on a layered silicate / organic composite (wherein the silicate part and the organic group are covalently bonded). Provided is a method for swelling the composite, and thirteenth, a method for swelling the layered organosiloxane by causing an organic solvent to act on the layered organosiloxane. 14th is a swelling treatment method for a layered silicon compound / organic composite, characterized in that in the twelfth and thirteenth swelling treatment methods, the treatment is carried out at room temperature.

According to the fifteenth aspect of the present invention, there is provided a coating agent characterized by containing the inorganic / organic composite nanosheet according to any one of the first to fifth inventions as an active ingredient. A filler characterized in that at least a part of the inorganic / organic composite nanosheet according to any one of the first to fifth inventions is used. / The organic composite nanosheet constitutes at least a part of the inorganic /
A thin film obtained by aligning a layered inorganic / organic composite constructed using an organic composite nanosheet on an eighteenth, inorganic / organic composite nanosheet of any of the first to fifth inventions on a substrate I will provide a.

The reason why the inorganic / organic composite nanosheet is formed by the methods of the sixth and eighth inventions of the present invention is considered as follows. Due to the affinity between the organic solvent molecules and the organic portion, the organic solvent molecules are taken in between the layers of the composite, and the composite swells. Furthermore, when the mixing ratio of the organic solvent is increased and an excess organic solvent is present in the system, the affinity between the organic part and the organic solvent is strong, and the affinity between the layered composite and the organic solvent is an appropriate combination. The organic solvent solvates the organic portion of the composite, and the layered composite peels. The affinity between the organic solvent and the organic part is thought to be mainly due to van der Waals forces. It is thought that dipole-dipole attractive force also works between the organic solvent and the whole complex.

The solving means of the present invention is as described above, and the inorganic / organic composite nanosheet can be produced by these solving means. Also, instead of using nanosheets as a single species, multiple layered inorganic / organic composites can be reconstructed by combining and recombining multiple different types of composite nanosheets in which the organic and / or inorganic portions are different chemical species. Manufacture is possible. Thereby, for example, two or more different organic portions can exist in the same two-dimensional field (interlayer formed by a pair of adjacent sheet-like inorganic portions). There is a possibility that segregation, which has been a problem with conventional layered silicate / organic composites obtained by intercalation reactions, can also be solved.

Further, the present invention provides a layered silicon compound in which an inorganic part and an organic part are bonded by a covalent bond /
Since a method for swelling the organic composite is also provided, it can be formed using the method of the present invention over a wide range from the layered silicon compound to the inorganic / organic composite nanosheet through the swollen state.

The present invention has the features as described above, and an embodiment thereof will be described below. The inventors focused on the importance of refining to the nano level and achieving both inorganic / organic bonding in order to obtain an inorganic / organic composite nanosheet. As a layered composite that is a starting material that gives a composite nanosheet that can achieve both, 1. 1. The inorganic part and the organic part have a robust interface through a covalent bond; 2. It can be subdivided to nano level under relatively mild conditions. Even if it is subdivided to the nano level, the structure in the two-dimensional direction of the inorganic part is stable, that is, the bond in one direction (stacking direction) is weak, but the bond in the remaining two directions (in the layer) seems to be robust. 3. It has characteristics. Those that are stable even after the nanosheeting operation are desirable.
From such knowledge, the layered silicon compound / organic compound composite previously developed by the present inventors (for example, Patent Document 2; JP-A-2004-107494) is optimal.

That is, as described above, the inorganic / organic composite nanosheet provided by the first and second inventions of the present application is a nanosheet in which two of the three sides are 0.1 to 2 μm and the remaining one side is 1 to 3 nm. Although it is a sheet with a thickness of the order, the inorganic / organic interface is covalently bonded, so even if it is subdivided by being surrounded by the solvent to the nano level, the inorganic / organic interface is maintained, and the nano level composite Succeeded in producing the body.

In addition, the composition of the inorganic / organic composite nanosheet has a general formula R _h M _{6 / i} Si _j O _k (OH) _l (where R is an organic group, M is at least one of Mg, Al, and Fe). Represents an element, 0.1 ≦ h ≦ 1, i represents the valence of the element M, 2 ≦ j ≦ 4, 6 ≦ k ≦ 10, 2 ≦ l ≦ 6). Since the element M has an octahedral sheet, and the octahedral sheet is sandwiched between two tetrahedral sheets formed by Si, it has a structure similar to a 2: 1 type layered clay mineral. Even if it is subdivided to the nano level, the structure in the layer remains stable, and the size in two directions is 0.1-2 μm, which is relatively large with respect to the thickness direction, and thus has a sheet-like form. Moreover, such an inorganic part, an organic part, and an inorganic / organic interface are stable after the nanosheet forming operation provided in the sixth and eighth inventions of the present application.

In addition, as provided by the second invention of the present application, it is also possible to obtain an inorganic / organic composite nanosheet in which the element M forming the octahedral sheet is partially substituted with the element L. Here, L represents at least one element of alkali metal as described above. Since various alkali metals are included and the charge of the inorganic portion can be changed, there is a possibility of designing a nanosheet that can be freely adapted to the application.

In the first or second and sixth inventions of the present application, the coefficient h of the organic group R must be greater than 0,
Theoretically, 4 is allowed. However, in view of the structural stability of the inorganic silicate portion, it is more practically set to 1 or less.

In the first or second and sixth inventions of the present invention, as the organic group R, an alkyl group or an alkylammonium group is considered to be particularly convenient because it is a relatively stable and lipophilic group. There is no limit to this. The inorganic part of the inorganic / organic composite nanosheet provided by the present invention can be a siloxane sheet having a two-dimensional extent as provided by the fourth and fifth inventions of the present application.

As a method for producing the inorganic / organic composite nanosheet, as provided by the sixth or eighth invention of the present application, it can be expressed by a composition formula similar to the target inorganic / organic composite nanosheet, and the target nanosheets are stacked. It is most convenient to apply an organic solvent to the layered silicon compound / organic composite having the structure, and it can be widely applied. Further, as provided by the seventh or ninth invention of the present application, the organic solvent can be caused to swell before being peeled off by the action of the organic solvent.

The organic solvent used is: 1. High affinity with the layered inorganic / organic composite to be used, particularly with the organic moiety; The layered inorganic / organic composite to be used and the target inorganic / organic composite nanosheet must not be decomposed. Moreover, since it is desirable that the operation can be performed under a mild condition near room temperature, a liquid which is liquid near room temperature is preferable. Further, if the volatility is too high, a special environment is required for the nanosheet forming operation, and if it is too low, the purification treatment of the intended composite nanosheet obtained becomes troublesome. For example, it is very easy to use toluene, xylene or the like as provided in the tenth invention of the present application and allow an organic solvent to act at room temperature as provided in the eleventh invention of the present application.

Further, the invention of the twelfth to fourteenth aspects of the present application provides a method for swelling the layered silicon compound / organic composite. As a result, the solid layered silicon compound / organic composite, its swollen state, and composites in various states ranging from composite nanosheets can be used continuously, which is very convenient in practice. For example, when used as a viscosity modifier, the layered silicon compound / organic composite can be added in a swollen state according to the target viscosity.

The inorganic / organic composite nanosheet of the present application can be used in various applications. As provided in the fifteenth and sixteenth inventions of the present application, the inorganic / organic composite nanosheet is used as a coating agent and a filler, or as a constituent agent of a part thereof. I can do it.

Further, when the inorganic / organic composite nanosheet of the present application is used, various new materials as described above can be designed. The novel layered inorganic / organic composite obtained by restructuring the composite nanosheet provided in the seventeenth invention of the present application and the thin film provided in the eighteenth invention are also one of the new materials.

Examples will be shown below, and the embodiments of the present invention will be described in more detail.
9.13 g of silica sol, 45.26 g of 50 wt% methanol solution of octadecyldimethyl (3-trimethoxysilylpropyl) ammonium chloride, 3.50 g of magnesium hydroxide, and 0.31 g of lithium fluoride were weighed and thoroughly dispersed in ion-exchanged water to prepare a reaction solution. did. This reaction solution was kept at 200 ° C. for 3 days, and the product was filtered off, and then washed with methanol and then with ion-exchanged water. The obtained sample was dried to obtain a powder.

This powder has a 2: 1 structure in which the inorganic part is similar to hectorite, that is, a structure in which one octahedron sheet is sandwiched between two Si tetrahedron sheets and a layer is further laminated. Is an aliphatic quaternary ammonium group, an organic part is present between layers of an inorganic part, and is further complexed via a covalent bond. The composition is R _0.43 Li _0.009 (Mg _2.99 Li _0.009 ) Si _3.22 O _k (OH ) It was a layered silicate / alkylammonium complex represented by _l . This powder was used as starting material. When 200 mg of the powder of the layered silicate / alkylammonium complex was added to 1 ml of toluene and stirred at room temperature for about 30 minutes, a colloidal mixed solution (mixed solution A) was obtained.

Further, an X-ray diffraction pattern of a mixed colloid solution having a concentration of 20 mg / 1 ml, which was obtained by diluting the mixture 10 times with toluene, was measured (FIG. 1 (a)). A reflection corresponding to a d value of 4.4 nm was observed on the low angle side. The reflection corresponding to 2.3 nm is considered to be secondary reflection. Layered silicate starting material /
Since the surface spacing of the alkylammonium complex is about 2.3 nm, it can be seen that the complex was swollen by the action of toluene.

The interplanar spacing discussed here is the interplanar spacing and is the sum of the thickness of one 2: 1 layer and the distance between layers. This mixed colloid solution was dropped on a substrate and dried, and then observed with a scanning electron microscope (SEM). As shown in FIG. 2 (a), laminated layered images were observed.

To the colloidal mixed solution (mixed solution A) obtained in Example 1, toluene was further added to dilute the mixed solution A by about 67 times to obtain a mixed colloid solution having a concentration of 3 mg / 1 ml. The XRD pattern was measured in the same manner for the sample thus obtained. As shown in FIG. 1B, no reflection was observed, suggesting the formation of a nanosheet.

Further, after a sample diluted to 100 times and having a concentration of 3 × 10 ⁻² mg / 1 ml was dropped on the substrate and dried,
When SEM observation was performed, as shown in Fig. 2 (b), images of nanosheets of various sizes dispersed and aggregated in different directions were seen, and what was a 10-fold diluted sample (Fig. 2 (a)) A very different image was seen. It is considered that toluene molecules are excessively intercalated between the layers of the composite in the mixed solution, further solvate the organic part (alkyl ammonium group), and finally peel off the layers. It is considered that the inorganic / organic composite nanosheet formed into a nanosheet by peeling off was deposited on the substrate during the drying process on the substrate. From these results, it was shown that a lipophilic inorganic / organic composite nanosheet can be obtained in a toluene solution.

As in Example 1, a layered silicate / alkylammonium complex was used as a starting material. When 200 mg of powder of the layered silicate / alkylammonium complex was added to 1 ml of 1-octanol and stirred at room temperature for about 1 hour, a colloidal mixed solution was obtained. XRD of mixed solution
When the pattern was measured, reflection corresponding to about 4 nm was observed, suggesting swelling of the layered composite. This swollen state is very stable, and is completely round on a glass slide in a dry nitrogen atmosphere.
The swelling state was maintained even after drying in the sun. Figure 3 shows the XRD pattern of the drying process. FIG. 3 (a) shows the state immediately after dropping (swelled state), and FIG. 3 (b) shows the state after drying for 2 days.

As described above in detail, according to the present invention, an inorganic / organic composite nanosheet having both the characteristics of an inorganic silicon compound and an organic substance can be provided. In other words, it has become possible to obtain a completely new composite material having both inorganic and organic characteristics and a nano-level size. Thereby, since the lipophilic nanosheet, ie, the nanosheet which can exist in the lipophilic solvent, can be produced, it can be used in a wide range as a coating agent, a filler and a viscosity modifier.

In Example 1 and 2, the XRD pattern of the mixed solution of a layered silicate / alkylammonium complex and toluene. (a) 20 mg / 1 ml, (b) 3 mg / 1 ml. In Example 1 and 2, the drawing substitute SEM image of the observation sample obtained by dripping and drying the mixed solution of a layered silicate / alkyl ammonium complex and toluene. (a) 20 mg / 1 ml, (b) 3 × 10 ⁻² mg / 1 ml. In Example 3, the XRD pattern of the drying process of the layered silicate / alkyl ammonium complex swollen by 1-octanol. (a) Immediately after dropping (swelled state), (b) After drying for 2 days.

Claims (18)

The two sides of the three sides are 0.1 to 2 μm, the remaining one side is 1 to 3 nm, the sheet is a nano-order thickness, and the inorganic part and the organic part are covalently bonded, and the composition is , General formula R _h M _{6 / i} Si _j O
_k (OH) _l (where R represents an organic group, M represents at least one element of Mg, Al, Fe, and 0.1 ≦ h
≦ 1, i represents the valence of the element M, 2 ≦ j ≦ 4, 6 ≦ k ≦ 10, 2 ≦ l ≦ 6. ) An inorganic / organic composite nanosheet represented by: Here, the inorganic portion has a structure similar to a 2: 1 type layered clay mineral in which the element M forms an octahedral sheet, and the octahedral sheet is sandwiched between two tetrahedral sheets formed by Si. have. A part of M of the general formula _{R h M 6 / i Si j} O k (OH) l according to claim 1, wherein substituted with at least one element of alkali metals, the composition, R _{h (M (6 / im)} Inorganic / organic composite nanosheet represented by L _m ) Si _j O _k (OH) _l (where L represents at least one element among alkali metals, and 0.005 ≦ m ≦ 1). The R is propyloctadecyldimethylammonium group.
Or the inorganic / organic composite nanosheet of 2. The two sides of the three sides are 0.1 to 2 μm, the remaining one is 0.5 to 5 nm, the sheet is a nano-order thickness, the organic group and the siloxane moiety are covalently bonded, and the composition is general Formula [R ' _n Si _p O _q (O
J) _r ] _s (where R ′ represents an organic group, J is H, Si, or an OJ group is easily OH in solution or suspension)
Inorganic / organic composite nanosheet represented by 0.5 ≦ n ≦ 2, 1.5 ≦ p ≦ 3, 2.5 ≦ q ≦ 4, 1 ≦ r ≦ 2.5, 2 ≦ s ≦ 200) . 5. The inorganic / organic composite nanosheet according to claim 4, wherein R ′ is an octadecyl group or a hexadecyl group. The composition has the general formula R _h M _{6 / i} Si _j O _k (OH) _l or R _h L _m (M _{(6 / im)} L _m ) Si _j O _k (OH) _l (where R is organic Group, M is at least one element of Mg, Al, Fe, and L is at least one of alkali metals
Represents an element of the species, 0.1 ≦ h ≦ 1, i represents the valence of the element M, 2 ≦ j ≦ 4, 6 ≦ k ≦ 10, 2 ≦ l ≦ 6, 0.005
<= M <= 1 is shown. 4), and the layered silicate / organic complex in which the silicate portion and the organic portion are covalently bonded is peeled off by applying an organic solvent to the layered silicate / organic composite. The manufacturing method of inorganic / organic composite nanosheet of description. 7. The inorganic / organic compound according to claim 6, wherein the layered silicate / organic composite is swollen by applying an organic solvent before the layered silicate / organic composite is peeled by applying an organic solvent. Manufacturing method of composite nanosheet. The composition is represented by the general formula [R ′ _n Si _p O _q (OJ) _r ] _s (where R ′ represents an organic group, J is H, Si, or an OJ group easily in solution or suspension). Represents a group that can be converted to an OH group, 0.5 ≦ n ≦ 2, 1.5 ≦ p ≦ 3, 2.5 ≦ q
The inorganic / organic composite nanosheet according to claim 4 or 5, wherein the layered organosiloxane represented by ≦ 4, 1 ≦ r ≦ 2.5, and 2 ≦ s ≦ 200 is peeled by applying an organic solvent to the layered organosiloxane. Manufacturing method. 9. The method for producing an inorganic / organic composite nanosheet according to claim 8, wherein the organic solvent is allowed to swell before the layered organosiloxane is peeled off by applying an organic solvent to the layered organosiloxane. The method for producing an inorganic / organic composite nanosheet according to claim 6, wherein toluene is used as the organic solvent. The method for producing an inorganic / organic composite nanosheet according to any one of claims 6 to 10, wherein an organic solvent is allowed to act at room temperature. A method for swelling a layered silicate / organic composite by allowing an organic solvent to act on the layered silicate / organic composite. A method for swelling a layered organosiloxane by causing an organic solvent to act on the layered organosiloxane. 14. The method for swelling a layered silicon compound / organic composite according to claim 12 or 13, wherein an organic solvent is allowed to act at room temperature. 6. A coating agent comprising the inorganic / organic composite nanosheet according to claim 1 as an active ingredient. A filler comprising at least a part of the inorganic / organic composite nanosheet according to claim 1. A layered inorganic / organic composite constructed by using the inorganic / organic composite nanosheet according to claim 1, wherein the inorganic / organic composite nanosheet according to claim 1 constitutes at least a part thereof. A thin film obtained by aligning the inorganic / organic composite nanosheet according to any one of claims 1 to 5 on a substrate.

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