skip to main content
OSTI.GOV title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: Controlled release of entrapped nanoparticles from thermoresponsive hydrogels with tunable network characteristics

Journal Article · · Soft Matter
DOI:https://doi.org/10.1039/d0sm00207k· OSTI ID:2281991
 [1]; ORCiD logo [2];  [3];  [4]
  1. Northwestern Polytechnical Univ., Xi'an, Shaanxi (China); Brown Univ., Providence, RI (United States)
  2. Clemson Univ., SC (United States)
  3. Northwestern Polytechnical Univ., Xi'an, Shaanxi (China)
  4. Brown Univ., Providence, RI (United States)

Thermoresponsive hydrogels have been studied intensively for creating smart drug carriers and controlled drug delivery. Understanding the drug release kinetics and corresponding transport mechanisms of nanoparticles (NPs) in a thermoresponsive hydrogel network is the key to the successful design of smart drug delivery systems. Here, we construct a mesoscopic model of rigid NPs entrapped in a hydrogel network in an aqueous solution, where the hydrogel network is formed by cross-linked semiflexible polymers of thermoresponsive poly(N-isopropylacrylamide) (PNIPAM). By varying the temperature crossing the lower critical solution temperature of PNIPAM, we can significantly change the hydrogel network characteristics. We systematically investigate how the matrix porosity and the nanoparticle size affect the transport kinetics of NPs at different temperatures. Quantitative results on the mean-squared displacement and the van Hove displacement distributions of NPs show that all NPs entrapped in the smart hydrogels undergo subdiffusion at both low and high temperatures. For a coil state, the transport of NPs in the hydrogels can be enhanced by decreasing the matrix porosity of the polymer network and NPs' size. However, when the solution temperature is increased above the critical temperature, the hydrogel network collapses following the coil-to-globule transition, with the NPs tightly trapped in some local regions inside the hydrogels. Consequently, the NP diffusion coefficient can be reduced by two orders of magnitude, or the diffusion processes can even be completely stopped. These findings provide new insights for designing controlled drug release from stimuli-responsive hydrogels, including autonomously switch on/off drug release in response to physical and chemical stimuli.

Research Organization:
Brown Univ., Providence, RI (United States)
Sponsoring Organization:
USDOE
Grant/Contract Number:
SC0019453; DESC0019453
OSTI ID:
2281991
Alternate ID(s):
OSTI ID: 1617391
Journal Information:
Soft Matter, Vol. 16, Issue 20; ISSN 1744-683X
Publisher:
Royal Society of ChemistryCopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 10 works
Citation information provided by
Web of Science

References (62)

Temperature-Dependent Nanoparticle Dynamics in Poly( N -isopropylacrylamide) Gels journal May 2018
New directions in thermoresponsive polymers journal January 2013
Environment-sensitive hydrogels for drug delivery journal December 2001
Energy-conserving dissipative particle dynamics with temperature-dependent properties journal May 2014
Polymer microcapsules as mobile local pH-sensors journal January 2007
Stimulus responsive nanogels for drug delivery journal January 2011
Network confinement and heterogeneity slows nanoparticle diffusion in polymer gels journal May 2017
Fast Parallel Algorithms for Short-Range Molecular Dynamics journal March 1995
Dissipative particle dynamics: Bridging the gap between atomistic and mesoscopic simulation journal September 1997
Diffusion of nanoparticles in semidilute polymer solutions: A mode-coupling theory study journal July 2015
A review of stimuli-responsive nanocarriers for drug and gene delivery journal March 2008
Near-infrared-actuated devices for remotely controlled drug delivery journal January 2014
Temperature-Sensitive Polymersomes for Controlled Delivery of Anticancer Drugs journal November 2015
Flow around spheres by dissipative particle dynamics journal October 2006
Collapse–Swelling Transitions of a Thermoresponsive, Single Poly( N -isopropylacrylamide) Chain in Water journal December 2016
Soft micromachines with programmable motility and morphology journal July 2016
Non-Equilibrium Dynamics of Vesicles and Micelles by Self-Assembly of Block Copolymers with Double Thermoresponsivity journal March 2016
Anomalous yet Brownian journal July 2009
Hydrogel Nanoparticles with Thermally Controlled Drug Release journal June 2014
Diffusion of Sticky Nanoparticles in a Polymer Melt: Crossover from Suppressed to Enhanced Transport journal March 2018
Theory and Simulation of Attractive Nanoparticle Transport in Polymer Melts journal March 2018
Size-Dependent Dynamics of Nanoparticles in Unentangled Polyelectrolyte Solutions journal September 2015
Lower critical solution temperature versus volume phase transition temperature in thermoresponsive drug delivery systems journal January 2011
Investigation of swelling, drug release and diffusion behaviors of poly(N-isopropylacrylamide)/poly (N-vinylpyrrolidone) full-IPN hydrogels journal January 2007
Macromolecular Diffusion in a Crowded Polymer Nanocomposite journal May 2011
Controlled Release of Nanoparticles and Macromolecules from Responsive Microgel Capsules journal December 2011
Mobility of Nanoparticles in Semidilute Polyelectrolyte Solutions journal July 2014
Light-Triggered Soft Artificial Muscles: Molecular-Level Amplification of Actuation Control Signals journal August 2017
Near Infrared Laser-Induced Targeted Cancer Therapy Using Thermoresponsive Polymer Encapsulated Gold Nanorods journal May 2014
Mesoscale modeling of phase transition dynamics of thermoresponsive polymers journal January 2015
Statistical Mechanics of Dissipative Particle Dynamics journal May 1995
Hydrodynamic and subdiffusive motion of tracers in a viscoelastic medium journal October 2013
Thermo- and pH-responsive polymers in drug delivery☆ journal December 2006
Energy Conservative Dissipative Particle Dynamics Simulation of Natural Convection in Liquids journal September 2011
Dissipative particle dynamics with energy conservation journal December 1997
Theory of nanoparticle diffusion in unentangled and entangled polymer melts journal December 2011
Recent advances and challenges in designing stimuli-responsive polymers journal January 2010
Energy conservative dissipative particle dynamics simulation of natural convection in eccentric annulus journal October 2013
Nanoparticle Diffusion in Polymer Nanocomposites journal March 2014
Anomalous transport in the crowded world of biological cells journal March 2013
Hopping Diffusion of Nanoparticles in Polymer Matrices journal January 2015
Dissipative Particle Dynamics with Energy Conservation: Heat Conduction journal December 1998
Dissipative particle dynamics with energy conservation journal October 1997
Therapeutic Nanoparticles for Drug Delivery in Cancer journal March 2008
Stimuli-responsive polymers and their applications journal January 2017
Molecular Dynamics of Spherical Nanoparticles in Dense Polymer Melts journal March 2014
Structure and Dynamics of a Polymer–Nanoparticle Composite: Effect of Nanoparticle Size and Volume Fraction journal July 2018
Anomalous Diffusion in Thermoresponsive Polymer–Clay Composite Hydrogels Probed by Wide-Field Fluorescence Microscopy journal November 2014
Increased Temperature of Malignant Urinary Bladder Tumors In Vivo: The Application of a New Method Based on a Catheter Technique journal February 2001
Microscopic Theory of the Long-Time Diffusivity and Intermediate-Time Anomalous Transport of a Nanoparticle in Polymer Melts journal December 2014
Mesoscale modelling of environmentally responsive hydrogels: emerging applications journal January 2015
Diffusion of Nanoparticles in Semidilute Polymer Solutions: Effect of Different Length Scales journal July 2012
Natural convection heat transfer simulation using energy conservative dissipative particle dynamics journal May 2010
Micro-scale kinetics and heterogeneity of a pH triggered hydrogel journal January 2012
Molecular Dynamics Study on Nanoparticle Diffusion in Polymer Melts:  A Test of the Stokes−Einstein Law journal May 2008
Making flexible magnetic aerogels and stiff magnetic nanopaper using cellulose nanofibrils as templates journal August 2010
Molecular Dynamics Simulations of Fullerene Diffusion in Polymer Melts journal February 2017
Design of polymeric nanoparticles for biomedical delivery applications journal January 2012
Long-Time Tails and Cage Effect in Driven Granular Fluids journal March 2009
Technics, Individuation and Tertiary Memory: Bernard Stiegler's Challenge to Media Theory journal December 2012
Evidence of hydrodynamic and subdiffusive motion of tracers in a viscoelastic medium text January 2013
Dissipative Particle Dynamics with energy conservation text January 1997

Cited By (1)

Smart Polymers for Advanced Applications: A Mechanical Perspective Review journal August 2020

Similar Records

Related Subjects