JP6103838B2 - イオン性高分子微粒子を利用した土壌浸食防止方法 - Google Patents
イオン性高分子微粒子を利用した土壌浸食防止方法 Download PDFInfo
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- JP6103838B2 JP6103838B2 JP2012152103A JP2012152103A JP6103838B2 JP 6103838 B2 JP6103838 B2 JP 6103838B2 JP 2012152103 A JP2012152103 A JP 2012152103A JP 2012152103 A JP2012152103 A JP 2012152103A JP 6103838 B2 JP6103838 B2 JP 6103838B2
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- soil erosion
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- 238000000034 method Methods 0.000 title claims description 20
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- 239000006185 dispersion Substances 0.000 claims description 36
- 239000002689 soil Substances 0.000 claims description 32
- 235000002639 sodium chloride Nutrition 0.000 claims description 23
- 229920000642 polymer Polymers 0.000 claims description 21
- 150000003839 salts Chemical class 0.000 claims description 21
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- HRPVXLWXLXDGHG-UHFFFAOYSA-N Acrylamide Chemical compound NC(=O)C=C HRPVXLWXLXDGHG-UHFFFAOYSA-N 0.000 claims description 13
- 125000002091 cationic group Chemical group 0.000 claims description 12
- 239000001257 hydrogen Substances 0.000 claims description 12
- 229910052739 hydrogen Inorganic materials 0.000 claims description 12
- 125000004432 carbon atom Chemical group C* 0.000 claims description 10
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- 125000000217 alkyl group Chemical group 0.000 claims description 8
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- BFNBIHQBYMNNAN-UHFFFAOYSA-N ammonium sulfate Chemical compound N.N.OS(O)(=O)=O BFNBIHQBYMNNAN-UHFFFAOYSA-N 0.000 claims description 6
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- 125000002496 methyl group Chemical group [H]C([H])([H])* 0.000 claims description 6
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- NIXOWILDQLNWCW-UHFFFAOYSA-N 2-Propenoic acid Natural products OC(=O)C=C NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 description 4
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- OEIXGLMQZVLOQX-UHFFFAOYSA-N trimethyl-[3-(prop-2-enoylamino)propyl]azanium;chloride Chemical compound [Cl-].C[N+](C)(C)CCCNC(=O)C=C OEIXGLMQZVLOQX-UHFFFAOYSA-N 0.000 description 3
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- FVPMLCUKLBYBSV-UHFFFAOYSA-M 2-hydroxypropyl-dimethyl-(prop-2-enoyloxymethyl)azanium;chloride Chemical compound [Cl-].CC(O)C[N+](C)(C)COC(=O)C=C FVPMLCUKLBYBSV-UHFFFAOYSA-M 0.000 description 2
- DWSMBORYMHSAEA-UHFFFAOYSA-N 3-[(4-amino-4-iminobutan-2-yl)diazenyl]butanimidamide;dihydrochloride Chemical compound Cl.Cl.NC(=N)CC(C)N=NC(C)CC(N)=N DWSMBORYMHSAEA-UHFFFAOYSA-N 0.000 description 2
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- GQOKIYDTHHZSCJ-UHFFFAOYSA-M dimethyl-bis(prop-2-enyl)azanium;chloride Chemical compound [Cl-].C=CC[N+](C)(C)CC=C GQOKIYDTHHZSCJ-UHFFFAOYSA-M 0.000 description 1
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- VGHRSPNHHSLNCP-UHFFFAOYSA-M ethyl-dimethyl-[phenyl(prop-2-enoyloxy)methyl]azanium;chloride Chemical compound [Cl-].C=CC(=O)OC([N+](C)(C)CC)C1=CC=CC=C1 VGHRSPNHHSLNCP-UHFFFAOYSA-M 0.000 description 1
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- LSHROXHEILXKHM-UHFFFAOYSA-N n'-[2-[2-[2-(2-aminoethylamino)ethylamino]ethylamino]ethyl]ethane-1,2-diamine Chemical compound NCCNCCNCCNCCNCCN LSHROXHEILXKHM-UHFFFAOYSA-N 0.000 description 1
- ZIUHHBKFKCYYJD-UHFFFAOYSA-N n,n'-methylenebisacrylamide Chemical group C=CC(=O)NCNC(=O)C=C ZIUHHBKFKCYYJD-UHFFFAOYSA-N 0.000 description 1
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Description
非特許文献1では、適切な塩濃度の水溶液中で正電荷をもつポリカチオンと負電荷をもつポリアニオンと溶解させたポリイオンコンプレックスを土壌に散布する方法が開示されているが、固定化強度で必ずしも満足する結果が得られているわけではなく、ポリイオンコンプレックス溶液を調製するのに時間を要し作業効率が低下するといった課題がある。
一般式(1)
R1は水素、メチル基またはカルボキシメチル基、AはSO3、C6H4SO3、CONHC(CH3)2CH2SO3、C6H4COOあるいはCOO、R2は水素またはCOOY2、Y1あるいはY2は水素または陽イオンをそれぞれ表わす。
一般式(2)
R1は水素又はメチル基、R2、R3は炭素数1〜3のアルキルあるいはヒドロキシアルキル基、R4は水素、炭素数1〜3のアルキル基、炭素数7〜20のアルキル基あるいはアリール基であり、同種でも異種でも良い、Aは酸素またはNH、Bは炭素数2〜4のアルキレン基またはアルコキシレン基を表わす、X1 −は陰イオンをそれぞれ表わす。
一般式(3)
R5は水素又はメチル基、R6、R7は炭素数1〜3のアルキル基あるいはヒドロキシアルキル基、X2 −は陰イオンをそれぞれ表わす。
イオン性高分子微粒子分散液として合成例1で得られた試作1を用い、カチオン性高分子および無機塩類を混合した混合分散液試料1〜3を調製し表1に示した。含有量は水溶液試料中のそれぞれの質量%を表す。混合分散液試料1〜3を用いて、後述の項目を評価した。
表2に示す混合分散液比較試料1〜3を調製した。含有量は混合分散液試料中のそれぞれの質量%を表す。混合分散液比較試料1〜3を用いて、後述の項目を評価した。
容器から取り出した時の混合分散液サンプルの固化の様子を4段階で評価した。
1:ほとんど崩れずに固化していた
2:少し崩れた部分があったが大部分は固化していた
3:半分がくずれてしまった
4:大部分がくずれてしまった
混合分散液サンプルを水中に浸漬させたときの様子を4段階で評価した。
1:ほとんどひび割れが発生しなかった
2:少しひび割れが発生し、一部崩壊した
3:ひび割れが発生し、半分程度が崩壊した
4:ひび割れが発生し、大部分が崩壊した
水分を4%程度含有する砂を半径7cm、高さ3cmのポリプロピレン製容器に550g敷き詰め、砂表面に表2で示す混合分散液試料1〜3を均等に散布した。その後、50℃の乾燥機で24時間乾燥させ、固化した砂を容器から取り出し混合分散液サンプルとした。混合分散液サンプルを実施例1と同様に各項目の評価を4段階で評価した。結果を表3に示す。
Claims (5)
- 下記(A)、(B)、(C)を含有する混合分散液を土壌表面に散布することを特徴とする土壌浸食防止方法。
(A)塩水溶液中に少なくとも一種の多糖類を分散させ、下記一般式(1)で表されるアニオン性単量体を2〜100モル%、共重合可能な非イオン性単量体0〜98モル%を含有する単量体あるいは単量体混合物を、該塩水溶液中に可溶な高分子分散剤を共存させ、攪拌下、分散重合して得られたイオン性高分子微粒子分散液。
(B)下記一般式(2)あるいは(3)で表される単量体を必須として含有する単量体混合物を重合したカチオン性高分子。
(C)無機塩類。
一般式(1)
ここでR1は水素、メチル基またはカルボキシメチル基、AはSO3、C6H4SO3、CONHC(CH3)2CH2SO3、C6H4COOあるいはCOO、R2は水素またはCOOY2、Y1あるいはY2は水素または陽イオンをそれぞれ表わす
一般式(2)
R1は水素又はメチル基、R2、R3は炭素数1〜3のアルキルあるいはヒドロキシアルキル基、R4は水素、炭素数1〜3のアルキル基、炭素数7〜20のアルキル基あるいはアリール基であり、同種でも異種でも良い、Aは酸素またはNH、Bは炭素数2〜4のアルキレン基またはアルコキシレン基を表わす、X1 −は陰イオンをそれぞれ表わす。
一般式(3)
R5は水素又はメチル基、R6、R7は炭素数1〜3のアルキル基あるいはヒドロキシアルキル基、X2 −は陰イオンをそれぞれ表わす。 - 前記一般式(1)のアニオン性単量体が、(メタ)アクリル酸、イタコン酸、2−アクリルアミド2−メチルプロパンスルホン酸またはこれらの塩から選択される一種以上であることを特徴とする請求項1に記載の土壌浸食防止方法。
- 前記一般式(2)あるいは(3)のカチオン性高分子が、ポリジアリルジメチルアンモニウムクロリド、アクリルアミド−ジアリルジメチルアンモニウムクロリド共重合体、ポリ(メタ)アクリロイルオキシエチルトリメチルアンモニウムクロリド、アクリルアミド−(メタ)アクリロイルオキシエチルトリメチルアンモニウムクロリド共重合体、ポリ(メタ)アクリロイルオキシエチルジメチルベンジルアンモニウムクロリド、アクリルアミド−(メタ)アクリロイルオキシエチルジメチルベンジルアンモニウムクロリド共重合体、から選択される1種以上であることを特徴とする請求項1に記載の土壌浸食防止方法。
- 請求項1に記載の無機塩類が硫酸アンモニウム、硫酸ナトリウム、塩化ナトリウムから選択される1種以上であることを特徴とする請求項1に記載の土壌浸食防止方法。
- 請求項1に記載の多糖類が澱粉類であることを特徴とする請求項1に記載の土壌浸食防止方法。
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