4 research outputs found
Covalent Organic Network Membranes with Tunable Nanoarchitectonics from Macrocycle Building Blocks for Graded Molecular Sieving
Traditional piperazine-based polyamide
membranes usually suffer
from the intrinsic trade-off relationship between selectivity and
permeance. The development of macrocycle membranes with customized
nanoscale pores is expected to address this challenge. Herein, we
introduce 1,4-diazacyclohexane (2N), 1,4,7-triazacyclononane (3N),
and 1,4,8,11-tetraazacyclotetradecane (4N) as molecular building blocks
to construct the nanoarchitectonics of polyamide membranes prepared
from interfacial polymerization (IP). The permeance of covalent organic
network membranes follows the trend of 4N-TMC > 3N-TMC > 2N-TMC,
while
the molecular weight cutoff (MWCO) also follows the same trend of
4N-TMC > 3N-TMC > 2N-TMC, according to their nanopore size of
the
membranes. The microporosity, orientation, and surface chemistry of
covalent organic network membranes can be rationally designed by macrocycle
building units. The ordered nanoarchitectonics allows the membranes
to attain an excellent performance in graded molecular sieving. Importantly,
the novel covalent organic network membranes with tunable nanoarchitectonics
prepared from macrocycle building units exhibited high water permeance
(32.5 LMH/bar) and retained long-term stability after 100 h of test
and bovine serum albumin fouling. These results reveal the enormous
potential of 3N-TMC and 4N-TMC membranes in saline textile wastewater
treatments and precise molecular sieving
Covalent Organic Network Membranes with Tunable Nanoarchitectonics from Macrocycle Building Blocks for Graded Molecular Sieving
Traditional piperazine-based polyamide
membranes usually suffer
from the intrinsic trade-off relationship between selectivity and
permeance. The development of macrocycle membranes with customized
nanoscale pores is expected to address this challenge. Herein, we
introduce 1,4-diazacyclohexane (2N), 1,4,7-triazacyclononane (3N),
and 1,4,8,11-tetraazacyclotetradecane (4N) as molecular building blocks
to construct the nanoarchitectonics of polyamide membranes prepared
from interfacial polymerization (IP). The permeance of covalent organic
network membranes follows the trend of 4N-TMC > 3N-TMC > 2N-TMC,
while
the molecular weight cutoff (MWCO) also follows the same trend of
4N-TMC > 3N-TMC > 2N-TMC, according to their nanopore size of
the
membranes. The microporosity, orientation, and surface chemistry of
covalent organic network membranes can be rationally designed by macrocycle
building units. The ordered nanoarchitectonics allows the membranes
to attain an excellent performance in graded molecular sieving. Importantly,
the novel covalent organic network membranes with tunable nanoarchitectonics
prepared from macrocycle building units exhibited high water permeance
(32.5 LMH/bar) and retained long-term stability after 100 h of test
and bovine serum albumin fouling. These results reveal the enormous
potential of 3N-TMC and 4N-TMC membranes in saline textile wastewater
treatments and precise molecular sieving
Covalent Organic Network Membranes with Tunable Nanoarchitectonics from Macrocycle Building Blocks for Graded Molecular Sieving
Traditional piperazine-based polyamide
membranes usually suffer
from the intrinsic trade-off relationship between selectivity and
permeance. The development of macrocycle membranes with customized
nanoscale pores is expected to address this challenge. Herein, we
introduce 1,4-diazacyclohexane (2N), 1,4,7-triazacyclononane (3N),
and 1,4,8,11-tetraazacyclotetradecane (4N) as molecular building blocks
to construct the nanoarchitectonics of polyamide membranes prepared
from interfacial polymerization (IP). The permeance of covalent organic
network membranes follows the trend of 4N-TMC > 3N-TMC > 2N-TMC,
while
the molecular weight cutoff (MWCO) also follows the same trend of
4N-TMC > 3N-TMC > 2N-TMC, according to their nanopore size of
the
membranes. The microporosity, orientation, and surface chemistry of
covalent organic network membranes can be rationally designed by macrocycle
building units. The ordered nanoarchitectonics allows the membranes
to attain an excellent performance in graded molecular sieving. Importantly,
the novel covalent organic network membranes with tunable nanoarchitectonics
prepared from macrocycle building units exhibited high water permeance
(32.5 LMH/bar) and retained long-term stability after 100 h of test
and bovine serum albumin fouling. These results reveal the enormous
potential of 3N-TMC and 4N-TMC membranes in saline textile wastewater
treatments and precise molecular sieving
Covalent Organic Network Membranes with Tunable Nanoarchitectonics from Macrocycle Building Blocks for Graded Molecular Sieving
Traditional piperazine-based polyamide
membranes usually suffer
from the intrinsic trade-off relationship between selectivity and
permeance. The development of macrocycle membranes with customized
nanoscale pores is expected to address this challenge. Herein, we
introduce 1,4-diazacyclohexane (2N), 1,4,7-triazacyclononane (3N),
and 1,4,8,11-tetraazacyclotetradecane (4N) as molecular building blocks
to construct the nanoarchitectonics of polyamide membranes prepared
from interfacial polymerization (IP). The permeance of covalent organic
network membranes follows the trend of 4N-TMC > 3N-TMC > 2N-TMC,
while
the molecular weight cutoff (MWCO) also follows the same trend of
4N-TMC > 3N-TMC > 2N-TMC, according to their nanopore size of
the
membranes. The microporosity, orientation, and surface chemistry of
covalent organic network membranes can be rationally designed by macrocycle
building units. The ordered nanoarchitectonics allows the membranes
to attain an excellent performance in graded molecular sieving. Importantly,
the novel covalent organic network membranes with tunable nanoarchitectonics
prepared from macrocycle building units exhibited high water permeance
(32.5 LMH/bar) and retained long-term stability after 100 h of test
and bovine serum albumin fouling. These results reveal the enormous
potential of 3N-TMC and 4N-TMC membranes in saline textile wastewater
treatments and precise molecular sieving