WO2011132675A1 - Water absorbent material - Google Patents
Water absorbent material Download PDFInfo
- Publication number
- WO2011132675A1 WO2011132675A1 PCT/JP2011/059629 JP2011059629W WO2011132675A1 WO 2011132675 A1 WO2011132675 A1 WO 2011132675A1 JP 2011059629 W JP2011059629 W JP 2011059629W WO 2011132675 A1 WO2011132675 A1 WO 2011132675A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- water
- soft tissue
- oil palm
- trunk
- water absorption
- Prior art date
Links
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
- B01J20/22—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising organic material
- B01J20/24—Naturally occurring macromolecular compounds, e.g. humic acids or their derivatives
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J2220/00—Aspects relating to sorbent materials
- B01J2220/40—Aspects relating to the composition of sorbent or filter aid materials
- B01J2220/48—Sorbents characterised by the starting material used for their preparation
- B01J2220/4812—Sorbents characterised by the starting material used for their preparation the starting material being of organic character
- B01J2220/485—Plants or land vegetals, e.g. cereals, wheat, corn, rice, sphagnum, peat moss
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J2220/00—Aspects relating to sorbent materials
- B01J2220/50—Aspects relating to the use of sorbent or filter aid materials
- B01J2220/68—Superabsorbents
Definitions
- the present invention relates to a naturally derived water-absorbing material.
- a highly water-absorbing material is a material that can absorb water from several tens to several thousand times its own weight.
- a highly water-absorbing resin having a water absorption performance of 10 g or more per 1 g of resin. It stipulates.
- a resin obtained by cross-linking sodium polyacrylate with N—N′-methylenebisacrylamide is widely used as a typical synthetic superabsorbent resin.
- Synthetic superabsorbent resins are widely used in disposable hygiene products and the like, but their biodegradability is low, and their disposal method is problematic.
- Starch which is a naturally derived material, or cellulose such as pulp or paper has water absorbency, and is superior to synthetic superabsorbent resins in terms of biodegradability.
- the water absorption of cellulose is due to the capillary phenomenon between the fibers, and does not reach the synthetic high water absorption resin.
- the water-absorbing material derived from starch has low water absorption performance and is not classified as high water absorption. Furthermore, since starch becomes slurry when absorbed, it is difficult to handle.
- xanthan gum-derived polymers (Patent Document 1) and Karaya gum-derived polymers (Patent Document 2) are known as highly water-absorbing materials mainly composed of naturally occurring polysaccharides.
- xanthan gum and karaya gum which are naturally derived polysaccharides, are water-soluble and, like starch, dissolve when water is absorbed and are difficult to handle.
- Patent Document 1 heats xanthan gum at 90 ° C. to 120 ° C. or mixes it with a poor solvent for xanthan gum.
- Patent Document 2 polycarboxylic acid is added to Karaya gum and then heated at 120 ° C. to 180 ° C. for surface crosslinking.
- it is generally necessary to perform extraction and purification operations from natural materials, and further, in order to insolubilize the materials, such as Karaya gum and xanthan gum. Need.
- Today there is a demand for naturally-derived water-absorbing materials that can reduce the running cost without adding the availability and processing of the materials.
- the present invention provides a water-absorbing material that is obtained from an oil palm trunk and is mainly composed of a fine particulate material called a soft tissue in the trunk.
- the soft tissue in the oil palm trunk is a fine particulate material present in the woody part inside the trunk.
- the water-absorbing material of the present invention can be obtained, for example, by drying the felled oil palm trunk and separating the soft tissue from the solid content in the wood part.
- the water-absorbing material of the present invention is a naturally-derived material and can be used in various fields such as animal excreta treatment, feed additives, agricultural and horticultural materials.
- animal excreta treatment e.g., cowpoxa treatment
- feed additives e.g., talc, karaya gum
- heat treatment or the like e.g., heat treatment or the like
- Oil palm is a plant of the palm family that is cultivated to collect palm oil, and is cut and replanted approximately every 25 years in order to maintain oil and fat productivity.
- about 40 million hectares of replanting is currently being carried out annually, so about 30 million tons of oil palm has been harvested.
- the trunk is hardly reused and it is left as it is. ing.
- FIG. 2 is a cross-sectional view of the oil palm trunk cut in the longitudinal direction as indicated by broken lines in FIG.
- the oil palm trunk constitutes a woody part composed of a soft tissue 1, a vascular bundle 2 and a bark 3. Since the outer layer portion near the bark 3 has a relatively low water content, the outer layer portion is used for plywood only in the outer layer portion.
- the soft tissue 1 and the vascular bundle 2 it has only been studied to hydrolyze and use as a raw material for ethanol fermentation, and its use has not been established yet.
- the oil palm trunk can be easily divided into fine powdery solid solids and acicular solids with a sieve after drying the water-insoluble component after collecting the sap, that is, the juice residue.
- the powdery fine particulate solid is called soft tissue. It is also possible to dry the felled oil palm trunk without squeezing the sap and separate the soft tissue from the woody part.
- the soft structure of oil palm that is, the water-absorbing material of the present invention has a porous structure in which fine pores are densely packed, and this porous structure is considered to play an important role in water absorption performance.
- Oil palm soft tissue can be obtained by simply defibrating and drying the wood part of the oil palm trunk tree, and does not require additional treatment such as heat treatment at high temperatures. Therefore, the running cost can be reduced as compared with the extraction and purification of polysaccharides.
- the soft tissue of oil palm swells when water is added, but is not gel-like when it does not contain water.
- a major feature is that even if salts and organic components are contained in the moisture, the water absorption capacity of the soft tissue hardly changes. For this reason, soft tissue is applied to water-absorbing articles intended to absorb body fluids such as urine, sweat, saliva and blood, such as paper diapers, portable toilets, pet urine absorbing materials, meat and fish freshness-retaining materials, etc. can do.
- water-absorbing articles for civil engineering materials that absorb mud, river water, seawater, soil and fertilizers can be used as soil improvement materials, or agricultural and horticultural materials such as water retention materials in dry land It can be used in a wide range, for example, as a water-absorbing article.
- the soft tissue may be used alone, for example, by wrapping it with a cloth or non-woven fabric to form a water-absorbing article.
- the water-absorbing material of the present invention may be preliminarily mixed with water and mixed with inorganic matter, soil or fertilizer.
- the oil palm trunk is divided into a hard bark surrounding the outside and a yellowish white wood part.
- the bark of the felled oil palm was removed, the woody part was squeezed, and the solid residue after squeezing the sap was dried at 60 ° C. for 1 to 3 days.
- the dried product was lightly pulverized in a mortar and fractionated with a sieve, it could be divided into fine powdery particles, ie soft tissue (diameter of about 30 ⁇ m to 50 ⁇ m), and needle-like solid solids, ie vascular bundles. .
- a soft tissue image is shown in FIG. 3, and a vascular bundle image is shown in FIG. It can be seen that the soft tissue is fine powdery particles and the vascular bundle is in a needle-like form.
- about 50 to 60% of the wood part was soft tissue and the rest was vascular bundle.
- Soft tissue and vascular bundles were dried at 70 ° C. for 1 day. 1 g of each solid content was weighed and placed in a tea bag under conditions that allow free swelling (size of bag that does not rupture even if it absorbs water 100 times) and was immersed in 1 liter of distilled water at 20 ° C. for 1 hour. Thereafter, the tea bag was suspended for 3 hours to drain water, then weighed (20 ° C.), and the water absorption capacity was determined from the following formula from the weight difference before and after immersion. The results are shown in Table 1.
- microcrystalline cellulose powder (Sigma Cell; Sigma Aldrich), cellulose powder (Whatman), starch (from corn; Wako Pure Chemical), silica gel (Wako Pure Chemical), agar (for microbial culture; Wako Pure Chemical), 1 g each of duran gum (Wako Pure Chemical Industries) was weighed, placed in a tea bag under conditions that allow free swelling (size of bag that does not burst even if it absorbs water 100 times), and was immersed in 1 liter of distilled water at 20 ° C. for 1 hour.
- the tea bag was suspended for 3 hours to drain water, and then weighed (20 ° C.) (this was referred to as the resin amount after immersion), and the water absorption ratio was determined from the weight difference from the resin amount before immersion. The results are shown in Table 1.
- the solid content obtained from the oil palm trunk, particularly the soft tissue has very high water absorption performance.
- the vascular bundle had a water absorption ratio of 1.4 times, while the soft tissue showed a water absorption ratio of about 20 times. That is, it can be seen that the water-absorbing material of the present invention has performance comparable to that of the highly water-absorbent resin specified in JIS Method-K-7223.
- the solid content from oil palm trunk is known to contain cellulose and hemicellulose as a constituent component, and a small amount of starch, but it is extremely high compared to the commercially available cellulose and starch components listed as comparative examples. It showed water absorption ability. Therefore, the water-absorbing performance of this soft tissue has shown that it has the water-absorbing ability by the function or structure different from the water-absorbing ability which a cellulose and starch have. Moreover, it turns out that the water absorption capacity
- FIG. 5 reveals that the soft tissue has a structure in which fine porous structures such as egg shells are densely packed.
- FIG. 6 it can be seen that fine pores are not densely packed in the vascular part, and that the structure is completely heterogeneous.
- the soft tissue was immersed in 0.05M phosphate buffer pH 5.5, and then excess water was removed with gauze and transferred to a petri dish, and the soil containing microorganisms was reduced to about 0. Mixed with 5 g, spread flat to make a solid medium and cultured at 30 ° C. Vigorous growth of filamentous fungi was mainly confirmed on the second day of culture.
- 1 ml of commercially available mold enzyme (Sigma, Cellulase) is added to 1 g of soft tissue and reacted in an acetate buffer (pH 5.0) for 48 hours. I let you.
- the decomposition solution was centrifuged at 14,000 rpm at 4 ° C. for 5 minutes, and the supernatant was diluted with distilled water to an appropriate concentration, and the sugar composition was measured.
- Each free sugar contained in the decomposition solution was measured by high performance liquid chromatography (Prominence, manufactured by Shimadzu Corporation) using a differential refraction detector with an Aminex HPX-87P column (Bio-Rad).
- High performance liquid chromatography Prominence, manufactured by Shimadzu Corporation
- Aminex HPX-87P column Bio-Rad
- the high water absorption performance of the soft tissue prepared from the oil palm trunk depends on its unique porous structural characteristics, and further has biodegradability. . Therefore, the solid content prepared from the oil palm trunk, particularly the soft tissue, can be used as a highly water-absorbing material.
- the water-absorbing material of the present invention may be wrapped in a water-permeable material such as paper or cloth to make a water-absorbing article.
- a water-permeable material such as paper or cloth
- water absorption performance hardly deteriorates even in solutions containing high salt concentrations such as seawater or flammable organic solvents. It can also be used as a poor environmental improvement material in the region. It can also be used as a soil conditioner that absorbs moisture and gradually releases the absorbed moisture.
Landscapes
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Solid-Sorbent Or Filter-Aiding Compositions (AREA)
- Water Treatment By Sorption (AREA)
Abstract
Description
今日、天然由来の吸水素材に関して、素材の入手の容易さと加工処理を付加することなく、ランニングコストを低減できるものが求められている。 However, xanthan gum and karaya gum, which are naturally derived polysaccharides, are water-soluble and, like starch, dissolve when water is absorbed and are difficult to handle. In order to solve this problem, Patent Document 1 heats xanthan gum at 90 ° C. to 120 ° C. or mixes it with a poor solvent for xanthan gum. In
Today, there is a demand for naturally-derived water-absorbing materials that can reduce the running cost without adding the availability and processing of the materials.
なお、キサンタンガムやカラヤガムとは異なり、加熱処理等を行う必要がないので安価に製造することができる。 The water-absorbing material of the present invention is a naturally-derived material and can be used in various fields such as animal excreta treatment, feed additives, agricultural and horticultural materials.
In addition, unlike xanthan gum and karaya gum, it is not necessary to perform heat treatment or the like, and can be manufactured at low cost.
伐採したオイルパームの樹皮を除いて、木質部を圧搾し、樹液を搾汁した後の固形残渣を60℃で1日から3日間乾燥させた。乾燥物を乳鉢で軽く粉砕後、篩により分画すると、パウダー状の細かい粒子、すなわち柔組織(直径約30μm~50μm)と、針状の固い固形分、すなわち維管束とに分けることができた。
柔組織の像を図3に、維管束の像を図4に示す。柔組織は、パウダー状の細かい粒子であり、維管束は、針状の形態であることがわかる。柔組織と維管束の分量は、木質部の約50~60%が柔組織で、残りが維管束であった。 The oil palm trunk is divided into a hard bark surrounding the outside and a yellowish white wood part.
The bark of the felled oil palm was removed, the woody part was squeezed, and the solid residue after squeezing the sap was dried at 60 ° C. for 1 to 3 days. When the dried product was lightly pulverized in a mortar and fractionated with a sieve, it could be divided into fine powdery particles, ie soft tissue (diameter of about 30 μm to 50 μm), and needle-like solid solids, ie vascular bundles. .
A soft tissue image is shown in FIG. 3, and a vascular bundle image is shown in FIG. It can be seen that the soft tissue is fine powdery particles and the vascular bundle is in a needle-like form. Regarding the amount of soft tissue and vascular bundle, about 50 to 60% of the wood part was soft tissue and the rest was vascular bundle.
柔組織1gをティーバッグに入れ、20℃の塩化ナトリウム5%(w%)、10%、20%溶液1リットルに浸漬した。結果を表2に示す。
有機溶媒を含む溶液に関しては、メタノール(和光純薬 特級)-蒸留水10%、30%(v%)溶液、及びエタノール(和光純薬 特級)-蒸留水10%、30%(v%)溶液をそれぞれ調製し、柔組織の浸漬を行った。その結果を表3に示す。 In order to examine the water absorption characteristics of the soft tissue, the water absorption effect of a solution containing a high salt concentration or a solution containing an organic solvent was tested.
1 g of soft tissue was placed in a tea bag and immersed in 1 liter of a 20% sodium chloride 5% (w%), 10%, 20% solution. The results are shown in Table 2.
For solutions containing organic solvents, methanol (Wako Pure Chemical), distilled water 10%, 30% (v%) solution, and ethanol (Wako Pure Chemical), distilled water 10%, 30% (v%) solution Each was prepared and the soft tissue was immersed. The results are shown in Table 3.
柔組織が、カビ酵素により分解可能かどうかを確認するため、市販カビ酵素(シグマ社、セルラーゼ)を柔組織1gに対し1ml加えて50℃、酢酸緩衝液(pH5.0)中で48時間反応させた。反応後、分解液を、14,000回転、4℃、5分間遠心したのち、上清を適当な濃度に蒸留水で希釈し糖組成について測定を行った。
分解液に含まれる各遊離糖の測定には、アミネックスHPX-87Pカラム(バイオラッド)による示差屈折検出器を用いた高速液体クロマトグラフィー(島津製作所製、Prominence)により測定した。
その結果、セロビオース、グルコース、キシロビオース、キシロース、アラビノースが検出され、柔組織が、酵素により分解していることが確認された。これらの結果から柔組織は、生分解能を持つ高吸水性素材であることが確認できた。 In order to confirm the biodegradability of the soft tissue, the soft tissue was immersed in 0.05M phosphate buffer pH 5.5, and then excess water was removed with gauze and transferred to a petri dish, and the soil containing microorganisms was reduced to about 0. Mixed with 5 g, spread flat to make a solid medium and cultured at 30 ° C. Vigorous growth of filamentous fungi was mainly confirmed on the second day of culture.
In order to confirm whether soft tissue can be decomposed by mold enzymes, 1 ml of commercially available mold enzyme (Sigma, Cellulase) is added to 1 g of soft tissue and reacted in an acetate buffer (pH 5.0) for 48 hours. I let you. After the reaction, the decomposition solution was centrifuged at 14,000 rpm at 4 ° C. for 5 minutes, and the supernatant was diluted with distilled water to an appropriate concentration, and the sugar composition was measured.
Each free sugar contained in the decomposition solution was measured by high performance liquid chromatography (Prominence, manufactured by Shimadzu Corporation) using a differential refraction detector with an Aminex HPX-87P column (Bio-Rad).
As a result, cellobiose, glucose, xylobiose, xylose and arabinose were detected, and it was confirmed that the soft tissue was degraded by the enzyme. From these results, it was confirmed that soft tissue is a highly water-absorbing material having biodegradability.
従ってオイルパーム幹から調製した固形分、特に柔組織は、高吸水性素材として利用することが可能である。 From the above results, it became clear that the high water absorption performance of the soft tissue prepared from the oil palm trunk depends on its unique porous structural characteristics, and further has biodegradability. .
Therefore, the solid content prepared from the oil palm trunk, particularly the soft tissue, can be used as a highly water-absorbing material.
Claims (4)
- オイルパーム幹から得られる幹中の柔組織と呼ばれる細かい粒子状の素材を主成分とする、吸水性素材。 A water-absorbing material composed mainly of fine particulate material called soft tissue in the trunk obtained from oil palm trunk.
- 前記柔組織が、伐採されたオイルパーム幹から得られる粒子状の素材である、請求項1記載の吸水性素材。 The water-absorbing material according to claim 1, wherein the soft tissue is a particulate material obtained from a felled oil palm trunk.
- 前記柔組織が、前記オイルパーム幹を搾汁した後に得られる残渣である、請求項1記載の吸水性素材。 The water absorbent material according to claim 1, wherein the soft tissue is a residue obtained after squeezing the oil palm trunk.
- オイルパーム幹又は伐採されたオイルパーム幹から得られる固形分から柔組織を分離することを特徴とする、吸水性素材の製造方法。 A method for producing a water-absorbing material, characterized in that soft tissue is separated from a solid content obtained from an oil palm trunk or a cut oil palm trunk.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN201180030545.1A CN102946992B (en) | 2010-04-20 | 2011-04-19 | Water absorbent material |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2010-097436 | 2010-04-20 | ||
JP2010097436A JP2011224479A (en) | 2010-04-20 | 2010-04-20 | Water absorbing material |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2011132675A1 true WO2011132675A1 (en) | 2011-10-27 |
Family
ID=44834194
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2011/059629 WO2011132675A1 (en) | 2010-04-20 | 2011-04-19 | Water absorbent material |
Country Status (4)
Country | Link |
---|---|
JP (1) | JP2011224479A (en) |
CN (1) | CN102946992B (en) |
MY (1) | MY171656A (en) |
WO (1) | WO2011132675A1 (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2014019036A (en) * | 2012-07-17 | 2014-02-03 | Mywood 2 Kk | Oil palm consolidated wood |
EP3424591A4 (en) * | 2016-03-01 | 2019-10-09 | Biosolvit Indústria, Comércio E Distribuição De Fibras Vegetais E Productus Derivados LTDA | Method for obtaining hydrocarbon absorber and product obtained |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2016159402A1 (en) * | 2015-03-30 | 2016-10-06 | 주식회사 아시아모빌 | Paper composition using oil palm trunk and method for preparing same |
KR101771606B1 (en) * | 2015-07-24 | 2017-08-28 | 아시아나노셀룰로오스 주식회사 | Nanocellulose using non-wood biomass and cosmetic composition and super absorbent material comprising it |
JP7260861B2 (en) * | 2017-05-25 | 2023-04-19 | 株式会社パームホルツ | How to use palm wood |
CN112604389A (en) * | 2020-11-13 | 2021-04-06 | 无锡华南钢结构环保有限公司 | Water mist separator for gas turbine air intake system |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP4604136B1 (en) * | 2009-06-16 | 2010-12-22 | 株式会社 東亜興業 | Pulp manufacturing apparatus, pulp manufacturing method, and high-concentration pulper |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0671171A (en) * | 1992-06-17 | 1994-03-15 | Masanaka Watanabe | Tropical palm adsorbent |
JPH11293677A (en) * | 1998-04-14 | 1999-10-26 | Kanegafuchi Chem Ind Co Ltd | Vegetation basic material |
JP3969913B2 (en) * | 1999-11-19 | 2007-09-05 | 正中 渡邉 | Raw garbage processing method and processed product |
JP4665261B2 (en) * | 2008-06-19 | 2011-04-06 | 株式会社北海道エコシス | Oil adsorbent with water repellency |
-
2010
- 2010-04-20 JP JP2010097436A patent/JP2011224479A/en active Pending
-
2011
- 2011-04-19 CN CN201180030545.1A patent/CN102946992B/en not_active Expired - Fee Related
- 2011-04-19 MY MYPI2012700795A patent/MY171656A/en unknown
- 2011-04-19 WO PCT/JP2011/059629 patent/WO2011132675A1/en active Application Filing
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP4604136B1 (en) * | 2009-06-16 | 2010-12-22 | 株式会社 東亜興業 | Pulp manufacturing apparatus, pulp manufacturing method, and high-concentration pulper |
Non-Patent Citations (2)
Title |
---|
TOMIMURA, YOICHI: "Chemical Characteristics of Oil Palm Trunk, Bulletin of FFPRI", BULL. FOR. & FOR. PROD. RES. INST., no. 362, 1992, pages 133 - 142 * |
YUTAKA MORI ET AL.: "Ethanol and Lactic Acid Production from Oil Palm Trunk", THE JAPAN INSTITUTE OF ENERGY, 2 August 2007 (2007-08-02), pages 196 - 197 * |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2014019036A (en) * | 2012-07-17 | 2014-02-03 | Mywood 2 Kk | Oil palm consolidated wood |
EP3424591A4 (en) * | 2016-03-01 | 2019-10-09 | Biosolvit Indústria, Comércio E Distribuição De Fibras Vegetais E Productus Derivados LTDA | Method for obtaining hydrocarbon absorber and product obtained |
Also Published As
Publication number | Publication date |
---|---|
CN102946992A (en) | 2013-02-27 |
JP2011224479A (en) | 2011-11-10 |
MY171656A (en) | 2019-10-22 |
CN102946992B (en) | 2014-12-17 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
WO2011132675A1 (en) | Water absorbent material | |
CN103392613B (en) | Cat litter with high water absorption | |
CN107183019A (en) | A kind of compound bio charcoal base carrier and preparation method and application with pesticide slow-release performance | |
DE102008032033A1 (en) | Composite material and shaped body made of polymer material and porous carrier as well as their production and application | |
CN102639229A (en) | Absorbent composition and methods thereof | |
US9901040B2 (en) | Cellulose blends with enhanced water retention and their use in irrigation | |
CN111109093B (en) | Composite cat litter and preparation method thereof | |
JP2017190448A (en) | Soil improvement agent | |
CN112521219B (en) | Biomass-based pesticide-fertilizer liquid mulching film and preparation method and application thereof | |
CN105483185A (en) | Modified sorghum starch and preparation process thereof | |
AU779420B2 (en) | Porous structure comprising fungi cell walls | |
Kaur et al. | Waste hemp-stalk derived nutrient encapsulated aerogels for slow release of fertilizers: A step towards sustainable agriculture | |
CN110896824A (en) | Nutrient seedling substrate for tomatoes | |
CN201051819Y (en) | Self-service sustained-releasing solid state water bag | |
SE1350743A1 (en) | A process for treating a plant with a solution comprising a nanofibrillated polysaccharide | |
JP6281074B2 (en) | Manufacturing method of water-absorbing material | |
CN111109046A (en) | Degradable seedling raising pot and preparation method thereof | |
Dingley et al. | Application of superabsorbent natural polymers in agriculture | |
CN108911856B (en) | Slow-release fertilizer wrapped by microalgae bodies or algae residues and preparation method thereof | |
CN112876793B (en) | Compound liquid film agent and preparation method and application thereof | |
EP3612145B1 (en) | Biobased super-absorbing polymers | |
Nasution et al. | Characteristics of CNC reinforced cassava starch biocomposites activated with holy basil extract | |
Treinyte et al. | Applicability of crude glycerol as the multifunctional additive for the preparation of mulching coatings | |
JP2007002383A (en) | Biodegradable sheet, and biodegradable container | |
CN104689365A (en) | Compound biological dressing for accelerating wound healing and preparation method thereof |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
WWE | Wipo information: entry into national phase |
Ref document number: 201180030545.1 Country of ref document: CN |
|
121 | Ep: the epo has been informed by wipo that ep was designated in this application |
Ref document number: 11772010 Country of ref document: EP Kind code of ref document: A1 |
|
WWE | Wipo information: entry into national phase |
Ref document number: 1201005579 Country of ref document: TH |
|
NENP | Non-entry into the national phase |
Ref country code: DE |
|
122 | Ep: pct application non-entry in european phase |
Ref document number: 11772010 Country of ref document: EP Kind code of ref document: A1 |