scholarly journals Preparation and properties of fast temperature-responsive soy protein/PNIPAAm IPN hydrogels

2014 ◽  
Vol 79 (2) ◽  
pp. 211-224 ◽  
Author(s):  
Yong Liu ◽  
Yingde Cui ◽  
Guojie Wu ◽  
Miaochan Liao
Keyword(s):  
Soy Protein ◽  
Polymer Network ◽  
Reaction Medium ◽  
Interpenetrating Polymer Network ◽  
Fickian Diffusion ◽  
Gravimetric Analysis ◽  
Scanning Calorimetry ◽  
Temperature Responsive ◽  
Swelling Mechanism ◽  
Responsive Hydrogels

The interpenetrating polymer network of fast temperature-responsive hydrogels based on soy protein and poly(N-isopropylacrylamide) were successfully prepared using the sodium bicarbonate (NaHCO3) solutions as the reaction medium. The structure and properties of the hydrogels were characterized by Fourier transform infrared spectroscopy, scanning electron microscopy, differential scanning calorimetry and thermal gravimetric analysis. The swelling and deswelling kinetics were also investigated in detail. The results have shown that the proposed hydrogels had high porous structure, good miscibility and thermal stability, and fast temperature responsivity. The presence of NaHCO3 had little effect on the volume phase transition temperature (VPTT) of the hydrogels, and the VPTTs were at about 32?C. Compared with the traditional hydrogels, the proposed hydrogels had much faster swelling and deswelling rate. The swelling mechanism of the hydrogels was the non-Fickian diffusion. This fast temperature-responsive hydrogels may have potential applications in the field of biomedical materials.

Drug Release Mechanism of Fast Temperature-Responsive Soy Protein/PNIPAAm IPN Hydrogels

2013 ◽  
Vol 781-784 ◽  
pp. 803-807 ◽  
Author(s):  
Yong Liu ◽  
Shou Lian Wei ◽  
Miao Chan Liao
Keyword(s):  
Soy Protein ◽  
Polymer Network ◽  
Reaction Medium ◽  
Interpenetrating Polymer Network ◽  
Release Mechanism ◽  
Porous Structures ◽  
Temperature Responsive ◽  
Drug Release Mechanism ◽  
Potential Applications ◽  
Fast Release

Fast temperature-responsive interpenetrating polymer network hydrogels based on soy protein and poly(N-isopropylacrylamide) (PNIPAAm) were prepared using the sodium bicarbonate (NaHCO3) solutions as the reaction medium. The structure and properties were characterized using Fourier transform infrared spectroscopy (FTIR) and scanning electron microscopy (SEM). The bovine serum albumin (BSA) release behaviors and release mechanism were also investigated. The results show that the proposed hydrogels have high porous structures and have a fast release rate. The BSA release mechanism belongs to an anomalous transport and the Fickian contribution is dominant. The proposed hydrogels may have the potential applications in the field of biomedical materials such as in the controlled release of drugs.

Controlled Release of Salidroside Microspheres Prepared Using a Chitosan and Methylcellulose Interpenetrating Polymer Network

2017 ◽  
Vol 13 (10) ◽  
Author(s):  
Zhenlin Chen ◽  
Fangjian Ning ◽  
Xingcun He ◽  
Hailong Peng ◽  
Hua Xiong
Keyword(s):  
Controlled Release ◽  
Polymer Network ◽  
Interpenetrating Polymer Network ◽  
Fickian Diffusion ◽  
Release Mechanism ◽  
X Ray Diffraction ◽  
Scanning Calorimetry ◽  
Release Process ◽  
Ft Ir ◽  
Schiff Base Formation

AbstractIn this work, salidroside, a functional food agent, was incorporated into novel interpenetrating polymer network microspheres (IPN-Ms) prepared by chitosan (CS) and methylcellulose (MC) for controlled release and stabilization. IPN-Ms were characterized using scanning electron microscopy, Fourier transform infrared spectroscopy (FT-IR), differential scanning calorimetry and X-ray diffraction. The result indicated that salidroside-loaded IPN-Ms (S-IPN-Ms) are hollow and highly spherical, with a coarse pleated surface and a particle size ranging from 5 to 30 µm. Schiff base formation and the hemiacetal reaction are the primary mechanisms underlying the interpenetrating network cross-linking of IPN-Ms. In S-IPN-Ms, the CS and MC were homogeneously blended, and the salidroside was molecularly and amorphously dispersed. The encapsulation efficiency of the salidroside within the S-IPN-Ms was up to 75.64 %. In the S-IPN-M complex, the release of salidroside by S-IPN-Ms was governed by burst and sustained release, and Fickian diffusion was the primary release mechanism for the entire release process. Thus, controlled release and stabilization of salidroside were achieved through incorporation of salidroside into IPN-Ms prepared by chitosan (CS) and methylcellulose.

Study of Application of Thermal Infrared Camouflage Materials in the National Defense Engineering

2014 ◽  
Vol 651-653 ◽  
pp. 107-110
Author(s):  
Nai Yan Zhang ◽  
Jun Liu
Keyword(s):  
Differential Scanning Calorimetry ◽  
Glass Transition ◽  
Room Temperature ◽  
Polymer Network ◽  
Thermal Infrared ◽  
Interpenetrating Polymer Network ◽  
National Defense ◽  
Scanning Calorimetry ◽  
Response To Temperature ◽  
Infrared Camouflage

In this paper, a series of semi-interpenetrating polymer network materials based on poly ((2-dimethylamino) ethyl methacrylate)/poly (N, N-diethylacrylamide) (PDMAEMA/PDEA) were synthesized at room temperature. The influence of this additive on the property of resulting PDEA materials was investigated and characterized. The glass transition temperature (Tg) of the semi-IPN materials was observed by Differential Scanning Calorimetry (DSC). Compared to PDEA, the semi-IPN materials exhibited excellent mutative values in response to an alternation of the temperature, and showed fast swelling and deswelling rates in response to temperature change, which suggests that these materials have potential application as thermal infrared camouflage materials.

Impedimetric transduction of swelling in pH-responsive hydrogels

The Analyst ◽  
2015 ◽  
Vol 140 (9) ◽  
pp. 3003-3011 ◽  
Author(s):  
Nicky Mac Kenna ◽  
Paul Calvert ◽  
Aoife Morrin
Keyword(s):  
Gluconic Acid ◽  
Polymer Network ◽  
Ph Responsive ◽  
Glucose Diffusion ◽  
Swelling Mechanism ◽  
Responsive Hydrogels ◽  
Over Time

Schematic of the swelling mechanism: (i) GOx immobilised within a polymer network, (ii) glucose diffusion and (iii) production of gluconic acid/network ionisation. Swelling response of glucose-sensitive hydrogels in 10 mM glucose over time. (After immersion for 24 h in DI water).

scholarly journals Synthesis and Characteristics of Interpenetrating Polymer Network Hydrogels Based on Silicone and Poly(vinyl alcohol)

2000 ◽  
Author(s):  
Seon Jeong Kim ◽  
Mi Seon Shin
Keyword(s):  
Aqueous Solution ◽  
Vinyl Alcohol ◽  
Contact Lenses ◽  
Gas Permeability ◽  
Polymer Network ◽  
Polymer Networks ◽  
Interpenetrating Polymer Networks ◽  
Interpenetrating Polymer Network ◽  
Poly Vinyl Alcohol ◽  
Scanning Calorimetry

Abstract Hydrogels have become increasingly important for use in the biomedical field. They are used diagnostic, therapeutic and implantable devices(e.g. catheter, biosensor, artificial skin, controlled release drug delivery system and contact lenses). Also silicone derivatives are widely used owing to their favorable properties such as low-glass transition temperature, high gas permeability, high thermal stability and good biocompatibility. We have studied the interpenetrating polymer networks(IPN) by previous reports, and to report on the preparation and properties of poly(vinyl alcohol), (PVA) and vinyl terminated polydimethylsiloxane(PDMS) IPN hydrogel in this presentation. The IPN composed of PVA and PDMS was synthesized by the following method. PVA was dissolved in the water to make 10wt% aqueous solution. And PDMS was mixed with 0.5wt% 2,2-dimethyl-2-phenylacetophenone(DMPAP) and 0.5mol% methylenebis acrylicamide(MBAAm). This mixture was added to PVA aqueous solution and heated at 90oC for 3hrs. Various IP{Ns were prepared from different mol ratios of PVA/PDMS. Hydrogels obtained were characterized by using FT-IR, wide angle X-ray diffractometry(WAXD), differential scanning calorimetry(DSC), dielectric analysis(DEA), and equilibrium water content(EWC).

Sign in / Sign up

Export Citation Format

Share Document