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Raelle F Gomes et al.
International journal of biological macromolecules, 156, 446-453 (2020-04-12)
In order to synthesize nanoparticles of galactomannan-g-poly-N-isopropylacrylamide copolymers, galactomannan from fava d'anta was partially hydrolyzed using hydrochloric acid. Degradation reduced the molar mass and increase mannose/galactose molar ratio. This study shows that high molar mass of galatomannan lead to formation
Roya Salehi et al.
International journal of pharmaceutics, 487(1-2), 274-284 (2015-04-22)
Two novel dual temperature/pH-sensitive superparamagnetic nanogels were developed with the aim of simultaneously delivering two different anticancer drugs, doxorubicin (DOX) and methotrexate (MTX). The studied copolymers were characterized by (1)H NMR, SEM, and FTIR spectroscopy. Morphological investigations showed that both
Yan Man et al.
Journal of separation science, 38(2), 339-345 (2014-11-08)
The polydimethylsiloxane microfluidic chip grafted with poly(N-isopropylacrylamide-3-acrylamidephenylboronic acid) (P(NIPAAm-co-AAPBA)) was fabricated by UV-induced grafting polymerization for the capture-release of cis-diol-containing biomolecules by temperature-modulated changes instead of changing the pH value of the mobile phase. Based on the optimal time for
Marcel Rey et al.
Soft matter, 16(14), 3407-3415 (2020-03-11)
The controlled aggregation of colloidal particles is not only a widespread natural phenomenon but also serves as a tool to design complex building blocks with tailored shape and functionalities. However, the quantitative characterization of such heteroaggregation processes remains challenging. Here
Rimesh Augustine et al.
Journal of materials chemistry. B, 8(26), 5745-5755 (2020-06-11)
A series of multi-stimuli-responsive poly(N-isopropylacrylamide)30-SS-block-poly(L-lysine)30-block-poly(caprolactone)n (p(NIPAM)30-SS-b-p(Lys)30-b-p(CL)n) (n = 50, 75, 100, 125) triblock copolymers have been synthesized by combining reversible addition-fragmentation chain transfer polymerization of NIPAM, organo-catalyzed ring-opening polymerization (ROP) of Z-lysine N-carboxyanhydride and metal-catalyzed ROP of CL with an
Yunlong Yu et al.
Soft matter, 11(43), 8508-8516 (2015-09-16)
Poly(N-isopropyl acrylamide) (PNIPAM) is a stimulus-responsive polymer that can switch in water from an expanded state below the lower critical solution temperature (LCST) of 32 °C to a globular state above the LCST. It was recently shown that, as a
Yuan-Jen Chang et al.
PloS one, 7(10), e44905-e44905 (2012-10-19)
In this study, a two-level full factorial design was used to identify the effects of the interactions between compositions in an N-isopropylacrylamide (NIPAM) gel dosimeter involving the following variables: (A) gelatin, (B) NIPAM, (C) the crosslinker N, N'-methylene-bis-acrylamide (Bis), and
Yamin Li et al.
Biomacromolecules, 13(11), 3877-3886 (2012-09-28)
Polymeric drug nanocarriers integrated with diagnostic and sensing functions are capable of in situ monitoring the biodistribution of chemotherapeutic drugs and imaging/contrasting agents, which enables the establishment of image-guided personalized cancer therapeutic protocols. Responsive multifunctional theranostic nanocarriers possessing external stimuli-tunable
Huayu Tian et al.
Macromolecular bioscience, 12(12), 1680-1688 (2012-11-07)
25 kDa branched polyethylenimines are modified by N-isopropylacrylamide via Michael addition. An agarose gel retardation assay shows that all derivatives display good binding affinity toward plasmid DNA. The modified PEI-25K shows lower cytotoxicity in MTT assay and better transfection efficiency
Weitai Wu et al.
Journal of diabetes science and technology, 6(4), 892-901 (2012-08-28)
The concept of closed-loop control of glucose, in which continuous glucose sensing is coupled to a fully automated insulin delivery device, without human input, has been an attractive idea for diabetes management. This study presents a new class of hybrid
Nobuo Uehara et al.
Analytical sciences : the international journal of the Japan Society for Analytical Chemistry, 31(6), 495-501 (2015-06-13)
Thermoresponsive immunonephelometry was achieved with biotinylated poly(acrylate) and thermoresponsive gold nanocomposites composed of 13-nm gold nanoparticles and thermoresponsive polymers containing triethylenetetramine and biotin groups. The avidin-biotin interaction was used to model an immunoreaction in order to demonstrate thermoresponsive immunonephelometry. In
Na Huang et al.
Chemphyschem : a European journal of chemical physics and physical chemistry, 15(9), 1785-1792 (2014-05-28)
Composite hydrogels--macroscopic hydrogels with embedded microgel particles--are expected to respond to external stimuli quickly because microgels swell much faster than bulky gels. In this work, the kinetics of the pH-induced swelling of a composite hydrogel are studied using turbidity measurements.
Polymerizing nonfluorescent monomers without incorporating any fluorescent agent produces strong fluorescent polymers.
Jun-Jie Yan et al.
Advanced materials (Deerfield Beach, Fla.), 24(41), 5617-5624 (2012-08-29)
Tobias K H Müller et al.
Journal of chromatography. A, 1285, 97-109 (2013-03-14)
An integrated approach to temperature-controlled chromatography, involving copolymer modified agarose adsorbents and a novel travelling cooling zone reactor (TCZR) arrangement, is described. Sepharose CL6B was transformed into a thermoresponsive cation exchange adsorbent (thermoCEX) in four synthetic steps: (i) epichlorohydrin activation;
Daisong Hou et al.
Journal of chromatography. A, 1349, 30-36 (2014-05-27)
Aqueous two-phase systems are efficient purification methods for bioproducts. However, recovery difficulty of the copolymers forming aqueous two-phase systems becomes obstacle in scale-up application. In the study, novel recyclable aqueous two-phase systems have been developed by using two thermo-responsive copolymers
Bailey Risteen et al.
Small (Weinheim an der Bergstrasse, Germany), 14(46), e1802060-e1802060 (2018-09-11)
A thermally "switchable" liquid-crystalline (LC) phase is observed in aqueous suspensions of cellulose nanocrystals (CNCs) featuring patchy grafts of the thermoresponsive polymer poly(N-isopropylacrylamide) (PNIPAM). "Patchy" polymer decoration of the CNCs is achieved by preferential attachment of an atom transfer radical
Ewa Moczko et al.
Journal of chromatography. B, Analytical technologies in the biomedical and life sciences, 1124, 1-6 (2019-06-09)
Herein an approach to prepare molecularly imprinted polymer nanoparticles (nanoMIPs) with specific binding affinity for antibodies is reported. The process relied on the covalent immobilization of the template (whole immunoglobulin G (IgG), Fc domain of human IgG and peptide epitope)
Katarzyna Zielińska et al.
Nanoscale, 8(9), 4951-4960 (2015-12-25)
The development of effective transdermal drug delivery systems based on nanosized polymers requires a better understanding of the behaviour of such nanomaterials at interfaces. N-Isopropylacrylamide-based nanogels synthesized with different percentages of N,N'-methylenebisacrylamide as cross-linker, ranging from 10 to 30%, were
Shannon E Bakarich et al.
Macromolecular rapid communications, 36(12), 1211-1217 (2015-04-14)
A smart valve is created by 4D printing of hydrogels that are both mechanically robust and thermally actuating. The printed hydrogels are made up of an interpenetrating network of alginate and poly(N-isopropylacrylamide). 4D structures are created by printing the "dynamic"
Zifu Li et al.
Langmuir : the ACS journal of surfaces and colloids, 31(23), 6282-6288 (2015-04-04)
Two distinct uniform hybrid particles, with similar hydrodynamic diameters and comparable zeta potentials, were prepared by copolymerizing N-isopropylacrylamide (NIPAM) and styrene. These particles differed in their styrene to NIPAM (S/N) mass ratios of 1 and 8 and are referred to
Sebastian Seiffert et al.
Journal of colloid and interface science, 452, 38-42 (2015-04-29)
Microfluidic droplet templating produces monodisperse particles of well controllable sizes, but this is limited by the necessity to operate microfluidic devices at low flow rates in the dripping regime. Here, the per-channel rate of droplet production could be substantially increased
Meunier, F., Elaissari, A.
Surfactant Science Series, 115, 117-117 (2003)
Bojan Mitrovic et al.
Langmuir : the ACS journal of surfaces and colloids, 29(2), 696-700 (2012-12-19)
A cationic polymer nanobrush was synthesized, attached to a MALDI target, and used for the fractionation of peptides and proteins based on their pI, prior to analysis by MALDI-MS. The cationic polymer nanobrush was synthesized on a gold substrate by
Gerard H Bode et al.
PloS one, 10(5), e0126136-e0126136 (2015-05-23)
The aim of the current study was to develop a method to detect peptide-linked nanoparticles in blood plasma. A convenient enzyme linked immunosorbent assay (ELISA) was developed for the detection of peptides functionalized with biotin and fluorescein groups. As a
Muhammad Zafar et al.
Materials science & engineering. C, Materials for biological applications, 40, 135-141 (2014-05-27)
The present investigation involves the preparation and characterisation of silver containing nanogels and their incorporation onto the surface of woven fabrics so that they can be potentially used in biomedical applications such as wound dressings. These silver nanoparticles were mixed
Peter Werner et al.
Analytical and bioanalytical chemistry, 409(3), 807-819 (2016-11-11)
The coil-to-globule transition of poly(N-isopropylacrylamide) (PNIPAM) microgel particles suspended in water has been investigated in situ as a function of heating and cooling rate with four optical process analytical technologies (PAT), sensitive to structural changes of the polymer. Photon Density
Fernando Benito-Lopez et al.
Lab on a chip, 14(18), 3530-3538 (2014-07-16)
This paper reports for the first time the use of a cross-linked poly(N-isopropylacrylamide) ionogel encapsulating the ionic liquid 1-ethyl-3-methylimidazolium ethyl sulphate as a thermoresponsive and modular microfluidic valve. The ionogel presents superior actuation behaviour to its equivalent hydrogel. Ionogel swelling
Marcin Lemanowicz et al.
Water research, 46(13), 4091-4098 (2012-06-05)
The impact of suspension heating method on the flocculation process using thermosensitive polymer is reported in this paper. In experiments a model suspension of chalk in RO water (purified by Reverse Osmosis) was destabilized using a copolymer of N-isopropylacrylamide (NIPAM)
Ming-Yue Jiang et al.
ACS applied materials & interfaces, 6(21), 19405-19415 (2014-10-18)
A novel type of smart microspheres with K(+)-induced shrinking and aggregating properties is designed and developed on the basis of a K(+)-recognition host-guest system. The microspheres are composed of cross-linked poly(N-isopropylacrylamide-co-acryloylamidobenzo-15-crown-5) (P(NIPAM-co-AAB15C5)) networks. Due to the formation of stable 2:1
Marieta Constantin et al.
European journal of pharmaceutical sciences : official journal of the European Federation for Pharmaceutical Sciences, 62, 86-95 (2014-05-23)
A dual drug delivery system based on a "biosensor" (pH-sensitive unit) and a delivery component (thermosensitive hydrogel) was developed. The pH/thermosensitive hydrogel is able to restore the thermosensitive characteristics after electrostatic interaction of the pH-sensitive units with selected biologically active
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