02264nas a2200193   4500008004100000022001400041245012300055210006900178260000800247300001400255490000700269520156500276100002001841700002301861700001701884700002601901700002101927856012201948       2022                        eng d  a1759-995400aAmino acid-derived ABCBA-type antifouling biohybrid with multi-stimuli responsivity and contaminant removal capability0 aAmino acidderived ABCBAtype antifouling biohybrid with multistim  cAPR  a1960-19690 v133 a<p>Multi-stimuli (pH/thermo/redox)-responsive amphiphilic poly(cysteine methacrylamide)-block-poly(2-(dimethylamino)ethyl methacrylate)-block-polybutadiene-block-poly(2-(dimethylamino)ethyl methacrylate)-block-poly(cysteine methacrylamide) (PCysMAM-b-PDMAEMA-b-PB-b-PDMAEMA-b-PCysMAM) pentablock copolymer biohybrids, based on hydrophobic PB, ampholytic redox responsive PCysMAM and dual (pH and temperature) stimuli responsive PDMAEMA segments, are synthesized via a four-step synthesis protocol. The synthesis protocol involves: (1) in situ post polymerization modification of living polybutadiene-based carbanionic species to prepare hydroxyl terminated polybutadiene (HTPB); (2) introduction of an initiating functionality (capable of acting as an ATRP initiator) to HTPB, yielding a telechelic ATRP macroinitiator (Br-PB-Br); (3) recyclable alloy-mediated successive RDRP of DMAEMA and CysMAM, yielding a series of PCysMAM-b-PDMAEMA-b-PB-b-PDMAEMA-b-PCysMAM (A-B-C-B-A) pentablock copolymers with various chain lengths; and (4) conversion of the PDMAEMA block to poly(quaternary ammonium) (PQA) via quaternization. The stimuli responsiveness of the copolymer is investigated against changes in pH, temperature and redox. The pentablock copolymer self-assembles into spherical nanospheres, can switch between its monocationic, zwitterionic and monoanionic charged states, exhibits antifouling behaviour and is capable of removing ionic contaminants from water. These pentablock copolymers may emerge as a promising material for emerging applications.</p>
1 aKumar, Devendra1 aMohammad, Sk, Arif1 aKumar, Anand1 aMane, Shivshankar, R.1 aBanerjee, Sanjib  uhttps://library.ncl.res.in/content/amino-acid-derived-abcba-type-antifouling-biohybrid-multi-stimuli-responsivity-and