Nanyang Technological University

Agency for Science, Technology and Research

Nippon Shokubai Co., Ltd.

Kyoto University

Godo Shigen Co., Ltd

Atsushi Goto

Yoshinobu Tsujii

Rong Wang

Keita Sakakibara

Hirotaka Mizoguchi

Alexander M Van Herk

Jit Sarkar

Longqiang Xiao

Feifei Li

Alexander William Jackson

Miao Tian

Yasuyuki Miyoshi

Michihiko Miyamoto

Hiroto Komatsu

Takuya Jitsukawa

The present invention relates to a nanoparticulate composition comprising nanoparticles formed from an amphipathic block copolymer comprising a hydrophilic block and a hydrophobic block, where the nanoparticles are provided in the form of micelles, cylindrical worm structures or vesicles and the size of the nanoparticles is from 25 to 500 nm, wherein: the composition is substantially free of heavy metals and compounds comprising sulfur. Also disclosed herein is a method of forming said nanoparticulate composition by polymerization induced self-assembly (PISA) via non-transition-metal catalysed controlled radical polymerization (NTMC-CRP).

Heavy metal- and odour-free nanoparticulate compositions

The present invention provides an antifouling ability-imparting agent that adheres well to a variety of water treatment membranes such as reverse osmosis membranes and imparts excellent antifouling ability to the water treatment membranes. The present invention relates to an antifouling ability-imparting agent containing a copolymer, the copolymer containing: a structural unit (I) represented by the following formula (1): wherein Ris a hydrogen atom or a methyl group; Ris a direct bond, —CH—, —CHCH—, or —CO—; Rs are the same as or different from each other and are each a C1-C20 alkylene group; X is —CHCH(OH)CH(OH) or —CH(—CHOH); and n is a number of moles of oxyalkylene groups added and is 0 to 100; and a structural unit (II) represented by the following formula (2): wherein Ris a hydrogen atom or a methyl group; Ris a direct bond, —CH—, —CHCH—, or —CO—; Rs are the same as or different from each other and are each a C1-C20 alkylene group; Ris a hydrogen atom or a C1-C20 alkyl group; and m is a number of moles of oxyalkylene groups added and is 1 to 100.

Fouling prevention ability-imparting agent and water treatment membrane manufactured using same

Growing community of inventors

Singapore, Singapore

Atsushi Goto