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WO2018236293A1 - Matériau cellulosique absorbant - Google Patents

Matériau cellulosique absorbant Download PDF

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Publication number
WO2018236293A1
WO2018236293A1 PCT/TH2018/000012 TH2018000012W WO2018236293A1 WO 2018236293 A1 WO2018236293 A1 WO 2018236293A1 TH 2018000012 W TH2018000012 W TH 2018000012W WO 2018236293 A1 WO2018236293 A1 WO 2018236293A1
Authority
WO
WIPO (PCT)
Prior art keywords
cellulosic material
absorbent cellulosic
absorbent
cellulose
material according
Prior art date
Application number
PCT/TH2018/000012
Other languages
English (en)
Inventor
Kitikhun HIANGRAT
Thomas Christopher AURAND
Klanarong SRIROTH
Original Assignee
Mitr Phol Sugarcane Research Center Co., Ltd.
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from TH1703001095U external-priority patent/TH14468A3/th
Application filed by Mitr Phol Sugarcane Research Center Co., Ltd. filed Critical Mitr Phol Sugarcane Research Center Co., Ltd.
Publication of WO2018236293A1 publication Critical patent/WO2018236293A1/fr

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Classifications

    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
    • C08F251/00—Macromolecular compounds obtained by polymerising monomers on to polysaccharides or derivatives thereof
    • C08F251/02—Macromolecular compounds obtained by polymerising monomers on to polysaccharides or derivatives thereof on to cellulose or derivatives thereof

Definitions

  • the invention relates to a process for producing an absorbent material including cellulosic fiber.
  • SAPs Superabsorbent polymers
  • SAP is a general term referring to polymers that can absorb and are able to retain large amount water comparing to its weight. SAPs are primarily used as an absorbent for diapers, personal hygiene products, cosmetics, medical instruments, food, medicines and other use in agriculture.
  • SAP can be a moisture retention aid for soil by mixing SAP with the soil to optimal water retention of the soil and increase crop yield.
  • SAPs are commonly made from petroleum-based polymers such as polyacrylate or polyacrylamide. Petroleum based SAPs have high liquid absorbent capacity but are not suitable for soil additives due to its low biodegradation rate which leads to contaminant remainder in soil and water resource after long-term use that affected to ecological damages in its using area. Recently there have been studies of the synthetic absorbent material from natural-based polymer that are derived from agricultural materials such as starch or cellulose to use in superabsorbent polymers due to its suitable structure and properties, inexpensive, and environmental friendly property.
  • this invention aims to modify absorbent cellulosic material from sugar industries by products instead of starch as substrate for obtaining superabsorbent material.
  • Cellulose is inexpensive, has high biocompatibility and biodegradation rate and also inexpensive.
  • the chemical structure of cellulose consisting of high hydroxyl group which can be easily modified to increase liquid absorbent capacity.
  • cellulose has higher salt resistance and anti-mildew resistance compared with starch.
  • the absorbent cellulosic material in this present invention comprises cellulose from bagasse, ethylenically unsaturated monomer, free radical initiator, crosslinker, and distilled water.
  • the absorbent cellulosic material which made from the polymerization of said compositions by thermal processing, electron beam or gamma ray.
  • the objective of this invention is to develop absorbent material made from cellulose that can absorb and retain extremely large amounts of liquid for using as a soil additive to increase the water retention of soils. It can increase crop quality and crop yield under drought stress.
  • this invention can be used to grow indoor plants to reduce watering frequency.
  • This invention discloses the absorbent cellulosic material for agricultural purposes as a moisture retention aid for soil.
  • the absorbent cellulosic material is used by mixing the material with soil to increase water retention of soil.
  • the absorbent cellulosic material comprises;
  • the cellulose substrate from bagasse has been removed from lignin, hemicellulose, and extractive by pre-treatment process, and milled into particle size of 80 mesh before polymerization into superabsorbent polymer.
  • Ethylenically unsaturated monomers help to increase liquid absorbent capacity of cellulose to obtain cellulose based polymer which having higher absorbent capacity than general cellulose.
  • Ethylenically unsaturated monomers is used between 10-50 wt%, preferably 15-40 wt%.
  • Ethylenically unsaturated monomer can be selected from the group consisting of acrylic acid, acrylamide, methacrylamide, acrylonitrite, vinyl-substituted heterocyclic compound, and combinations thereof.
  • the most suitable ethylenically unsaturated monomer for this invention is acrylic acid.
  • Free radical initiator can be selected from the group consisting of water soluble persulfate, water soluble azo-compound, hydrogen peroxide, ammonium persulfate, ammonium cerium nitrite, and combinations thereof.
  • the suitable amount of free radical initiator to initiate the process of this invention must be around 2-10 wt%, preferably between
  • the most suitable free radical initiator for this invention is ammonium persulfate.
  • Crosslinker bonds one polymer chain to another to form a larger mesh-like polymer molecule that has higher strength, and liquid absorption.
  • Crosslinker can be added into polymer solution.
  • Crosslinking density of absorbent polymer mesh in this invention is between 0.1 -30%, preferably less than 20%. Additionally, it must maintain hydrogel structure during swelling.
  • the preferred crosslinker for this invention is the compound that able to react with carboxyl group or hydroxyl group, and able to initiate polymerization when free radical initiator is present.
  • the amount of crosslinker for this invention is 2-10 wt%, the most suitable range is 2-5 wt%.
  • Crosslinker can be selected from the group of acrylate or acrylate of ethylene glycol, bisacrylamide, epoxy acrylates, allylamine, polyepoxide, epoxy silane, and combinations thereof.
  • the most suitable crosslinker for this invention is N, N'-Methylenebisacrylamide.
  • the absorbent cellulosic material is made from the polymerization of above composition by thermal processing, electron beam, or gamma ray.
  • the absorbent cellulosic material in this invention has higher absorption property than the absorbent material from starch. According to the test, the absorbent cellulosic material in this invention has the swelling capacity of 10-1500 times in distilled water, and 2-120 times in saline solution.
  • the absorbent cellulosic material in this invention has higher liquid absorbent capacity compared with the absorbent material from starch.
  • Thermal processing, electron beam and gamma ray are used in the manufacturing of this absorbent cellulosic material to increase liquid absorbent capacity.
  • Electron beam or gamma ray is used to crosslink the polymer together, which is cleaner and safer from chemical residue compared with the use of chemical compound.
  • Electron beam or gamma ray induces crosslinking between polymer chains to secure polymer molecules within the structure, to protect the molecule from hydrolysis after long-term use.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Health & Medical Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Medicinal Chemistry (AREA)
  • Polymers & Plastics (AREA)
  • Organic Chemistry (AREA)
  • Graft Or Block Polymers (AREA)
  • Polymerisation Methods In General (AREA)
  • Solid-Sorbent Or Filter-Aiding Compositions (AREA)

Abstract

La présente invention concerne un matériau cellulosique absorbant comprenant des monomères à insaturation éthylénique, un initiateur de radicaux libres, des agents de réticulation et de l'eau distillée. L'objectif de la présente invention est de développer un matériau absorbant fabriqué à partir de cellulose issue de la bagasse qui peut absorber et retenir des quantités extrêmement importantes de liquide afin d'être utilisé comme auxiliaire de rétention d'humidité pour le sol afin d'augmenter la rétention d'eau des sols. Ledit matériau peut augmenter la qualité des cultures et le rendement des cultures soumises à un stress de sécheresse. De plus, la présente invention peut être utilisée pour faire pousser des plantes intérieures pour réduire la fréquence d'arrosage.
PCT/TH2018/000012 2017-06-20 2018-03-27 Matériau cellulosique absorbant WO2018236293A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
TH1703001095 2017-06-20
TH1703001095U TH14468A3 (th) 2017-06-20 วัสดุดูดซึมที่มีส่วนประกอบของเส้นใยเซลลูโลส

Publications (1)

Publication Number Publication Date
WO2018236293A1 true WO2018236293A1 (fr) 2018-12-27

Family

ID=64737735

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/TH2018/000012 WO2018236293A1 (fr) 2017-06-20 2018-03-27 Matériau cellulosique absorbant

Country Status (1)

Country Link
WO (1) WO2018236293A1 (fr)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2002092669A1 (fr) * 2001-05-16 2002-11-21 Cerefi Oy Procede de preparation de substances absorbantes
WO2004103412A2 (fr) * 2003-05-19 2004-12-02 Rayonier Products And Financial Services Company Fibre cellulosique superabsorbante et procede de fabrication
CN1715304A (zh) * 2004-06-29 2006-01-04 北京理工大学 纤维素改性高吸水性树脂的制备方法
CN103333292A (zh) * 2013-06-17 2013-10-02 海南大学 一种蔗渣高吸水树脂的制备方法
CN104448145A (zh) * 2013-11-26 2015-03-25 柳州爱格富食品科技股份有限公司 高吸水树脂的制备方法

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2002092669A1 (fr) * 2001-05-16 2002-11-21 Cerefi Oy Procede de preparation de substances absorbantes
WO2004103412A2 (fr) * 2003-05-19 2004-12-02 Rayonier Products And Financial Services Company Fibre cellulosique superabsorbante et procede de fabrication
CN1715304A (zh) * 2004-06-29 2006-01-04 北京理工大学 纤维素改性高吸水性树脂的制备方法
CN103333292A (zh) * 2013-06-17 2013-10-02 海南大学 一种蔗渣高吸水树脂的制备方法
CN104448145A (zh) * 2013-11-26 2015-03-25 柳州爱格富食品科技股份有限公司 高吸水树脂的制备方法

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