Title:
BIOLOGICAL MEMBRANE AND HYDROGEL VIA CARBAMATE PROCESS
Document Type and Number:
WIPO Patent Application WO/2017/023161
Kind Code:
A3
Abstract:
The present invention provides a method of preparing cellulose based material comprising the steps of extracting cellulose from a lignocellulosic biomass by using a bleaching agent and an alkali solution to produce cellulose pulp, drying the cellulose pulp, preparing cellulose carbamate from the cellulose pulp, pre-cooling a cellulose solvent at a first temperature, dissolving the cellulose carbamate in the pre-cooled cellulose solvent to form a transparent cellulose solution, casting the transparent cellulose solution on a casting plate and immersing the casting plate in a coagulant until the transparent cellulose solution coagulates to form a cellulose membrane. Also, a method of preparing a hydrogel using the cellulose carbamate is disclosed.
Inventors:
SARANI BINTI ZAKARIA (MY)
GAN SIN YEE (MY)
CHIA CHIN HUA (MY)
GAN SIN YEE (MY)
CHIA CHIN HUA (MY)
Application Number:
PCT/MY2016/000043
Publication Date:
July 13, 2017
Filing Date:
July 29, 2016
Export Citation:
Assignee:
UNIV KEBANGSAAN MALAYSIA (MY)
International Classes:
C08B15/06; C08J3/075; C08J3/12; C08J3/24; C08J5/22; C08K3/20; C08L1/28; D21C3/00; D21C9/10
Foreign References:
| US20080275231A1 | 2008-11-06 | |||
| CN104226268A | 2014-12-24 |
Other References:
GAN, SINYEE ET AL.: "Synthesis of kenaf cellulose carbamate using microwave irradiation for preparation of cellulose membrane", CARBOHYDRATE POLYMERS, vol. 106, 2014, pages 160 - 165, XP028844999
CHOOK, SOON WEI ET AL.: "A graphene oxide facilitated a highly porous and effective antibacterial regenerated cellulose membrane containing stabilized silver nanoparticles", CELLULOSE, vol. 21, 29 August 2014 (2014-08-29), pages 4261 - 4270, XP055331981
NAMDEO, MINI ET AL.: "Immobilization of alpha-amylase onto cellulose-coated magnetite (CCM) nanoparticles and preliminary starch degradation study", JOURNAL OF MOLECULAR CATALYSIS B: ENZYMATIC, vol. 59, 2009, pages 134 - 139, XP026044094, DOI: doi:10.1016/j.molcatb.2009.02.005
KACO, HATIKA ET AL.: "Transparent and printable regenerated kenaf cellulose/PVA film", BIORESOURCES, vol. 9, no. 2, 2014, pages 2167 - 2178, XP055397812
ZHOU, JINPING ET AL.: "Hydrogels prepared from unsubstituted cellulose in NaOH/urea aqueous solution", MACROMOLECULAR BIOSCIENCE, vol. 7, 31 May 2007 (2007-05-31), pages 804 - 809, XP055397814
CHOOK, SOON WEI ET AL.: "A graphene oxide facilitated a highly porous and effective antibacterial regenerated cellulose membrane containing stabilized silver nanoparticles", CELLULOSE, vol. 21, 29 August 2014 (2014-08-29), pages 4261 - 4270, XP055331981
NAMDEO, MINI ET AL.: "Immobilization of alpha-amylase onto cellulose-coated magnetite (CCM) nanoparticles and preliminary starch degradation study", JOURNAL OF MOLECULAR CATALYSIS B: ENZYMATIC, vol. 59, 2009, pages 134 - 139, XP026044094, DOI: doi:10.1016/j.molcatb.2009.02.005
KACO, HATIKA ET AL.: "Transparent and printable regenerated kenaf cellulose/PVA film", BIORESOURCES, vol. 9, no. 2, 2014, pages 2167 - 2178, XP055397812
ZHOU, JINPING ET AL.: "Hydrogels prepared from unsubstituted cellulose in NaOH/urea aqueous solution", MACROMOLECULAR BIOSCIENCE, vol. 7, 31 May 2007 (2007-05-31), pages 804 - 809, XP055397814
Attorney, Agent or Firm:
TEE LIN YIK (MY)
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