A naturally crosslinked chitosan based ionic actuator with cathode deflection phenomenon

Sun, Zhuangzhi; Zhao, Gang; Song, Wenlong

doi:10.1007/s10570-016-1161-1

Cited by 25 publications

(12 citation statements)

References 16 publications

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“…The most common stimulus-response materials that could be used for an engineered brush border system include poly(N-isopropyl acrylamide) (temperature sensitive nanobrush), ionic polymer-metal composites (charge sensitive nanobrush) 32 , or chitosan (pH-sensitive nanobrush) [33][34][35] . Among these materials, chitosan (CHI) is one of the most attractive for analysis of food, as the polymer is biocompatible, low cost, and has unique stimulus-response properties that can be easily controlled 36 .…”

Section: Introductionmentioning

confidence: 99%

Actuation of chitosan-aptamer nanobrush borders for pathogen sensing

Hills

Oliveira

Cavallaro

et al. 2018

Analyst

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We demonstrate a sensing mechanism for rapid detection of Listeria monocytogenes in food samples using the actuation of chitosan-aptamer nanobrush borders. The bio-inspired soft material and sensing strategy mimic natural symbiotic systems, where low levels of bacteria are selectively captured from complex matrices. To engineer this biomimetic system, we first develop reduced graphene oxide/nanoplatinum (rGO-nPt) electrodes, and characterize the fundamental electrochemical behavior in the presence and absence of chitosan nanobrushes during actuation (pH-stimulated osmotic swelling). We then characterize the electrochemical behavior of the nanobrush when receptors (antibodies or DNA aptamers) are conjugated to the surface. Finally, we test various techniques to determine the most efficient capture strategy based on nanobrush actuation, and then apply the biosensors in a food product. Maximum cell capture occurs when aptamers conjugated to the nanobrush bind cells in the extended conformation (pH < 6), followed by impedance measurement in the collapsed nanobrush conformation (pH > 6). The aptamer-nanobrush hybrid material was more efficient than the antibody-nanobrush material, which was likely due to the relatively high adsorption capacity for aptamers. The biomimetic material was used to develop a rapid test (17 min) for selectively detecting L. monocytogenes at concentrations ranging from 9 to 107 CFU mL-1 with no pre-concentration, and in the presence of other Gram-positive cells (Listeria innocua and Staphylococcus aureus). Use of this bio-inspired material is among the most efficient for L. monocytogenes sensing to date, and does not require sample pretreatment, making nanobrush borders a promising new material for rapid pathogen detection in food.

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Section: Introductionmentioning

confidence: 99%

Actuation of chitosan-aptamer nanobrush borders for pathogen sensing

Hills

Oliveira

Cavallaro

et al. 2018

Analyst

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“…One such natural polymer, an amino polysaccharide derived from shrimp shells known as chitosan, finds use in electromechanical actuators mostly due to its low cost, biocompatibility, and good miscibility with ILs . Chitosan‐based actuators commonly contain a blend of chitosan and an IL or acidic electrolyte solution, coated with carbon nanotubes as the electrodes as shown in Figure The actuators bend due to ion migration from either the IL present in the membrane, or the counterion in the acidic electrolyte solution, which quaternizes the amine group on chitosan. Actuators based on chitosan show decent bending deformations at low voltages (<7 V) and relatively large blocking forces with a maximum force of 7.5 mN …”

Section: Ionic Polymer–metal Compositesmentioning

confidence: 99%

Section: Ionic Polymer–metal Compositesmentioning

confidence: 99%

Advances in Polymeric Materials for Electromechanical Devices

White

Long

2018

Macromol. Rapid Commun.

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DEs especially exhibit potential for mimicking human muscles due to their high strain capacity and work density. [6] Polymers used for DEs often include siloxanes or acrylic elastomers, and the optimal DE actuators (DEA) in literature are surprisingly comprised of a commercial acrylic adhesive from 3 M. [7] However, these DEs require prestretching and large driving voltages to achieve large actuation strains, which limit their impact. The past decade has seen a plethora of research dedicated to finding materials to circumvent these limitations.Nafion has long served as the benchmark material for IPMCs due to its commercial availability and superior actuation performance at low voltages. Nafion actuators, however, have several drawbacks such as: low bending performance at low humidity, processing difficulties, and back relaxation. Due to these limitations, interest in new ionic polymers for IPMCs continues to grow in the literature. [8] This review aims to summarize the progress made in materials for EAP actuators over the past decade, focusing on IPMCs and DEAs, which comprise a significant fraction of the recent advances.

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“…Because the DEAP is capable of simplifying the mechanical structure and improving the energy conversion rate, it is widely used in many scientific fields of bionic engineering, Micro‐Electro‐Mechanical System (MEMS), flexible robots, wearable sensors, electric control valves and biological medicine etc 4–7 . According to the actuation mechanism, the DEAP can be divided into two categories, that is, electronic type and ionic type, where the electronic DEAP includes dielectric elastomers, fenoelectric polymer, grafted elastomer, 8,9 and the ionic DEAP involves ionic polymer metal composite, ionic polymeric gel and conductive polymer 10,11 . Among them, biomimetic gelatinous polymer actuator (BGPA) belongs to the ionic DEAP that can produce reversible bending deflection and output force under external DC voltage.…”

Section: Introductionmentioning

confidence: 99%

Technology efficiency and promotion mechanism on the response output performance of a biomimetic gelatinous polymer actuator based on different process approaches

Yang

Kang

Tao

et al. 2022

J of Applied Polymer Sci

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In this paper, from different aspects of internal material composition, biomass modification method and assembly process factor of the biomimetic gelatinous polymer actuator (BGPA), its three process approaches including ionic liquid (IL, [EMIm]BF 4 ) doping amount, sodium alginate (SA) -carboxymethyl chitosan (CMCS) crosslinking ratio and casting assembly temperature were comprehensively compared, and accordingly their technology efficiency and promotion mechanism on response output performance of the BGPA had also been fully researched. The results suggested that under monotonic work cycle, when the IL doping amount was 4 ml, operating life of BGPA reached the maximum of 1720 s and its smallest tremor amplitude was 8.51%. When the SA-CMCS crosslinking ratio was 5:5, all three evaluation indexes of the duty cycle, internal resistance and elastic modulus of BGPA achieved the minima around 0.97%, 1.61 Ω and 0.207 MPa, respectively. When the casting assembly temperature was 50 C, specific capacitance and output force density of the BGPA separately obtained the largest values of 551.34 mF/g and 16.249 mN/g. Within the cycle repetition period, the best stable output force of the BGPA was approximately 2.877 mN with 4 ml ionic liquid, and its optimal electron current was 12.771 mA at 50 C.

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A naturally crosslinked chitosan based ionic actuator with cathode deflection phenomenon

Cited by 25 publications

References 16 publications

Actuation of chitosan-aptamer nanobrush borders for pathogen sensing

Actuation of chitosan-aptamer nanobrush borders for pathogen sensing

Advances in Polymeric Materials for Electromechanical Devices

Technology efficiency and promotion mechanism on the response output performance of a biomimetic gelatinous polymer actuator based on different process approaches

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