scholarly journals Melt Electrowriting of Amphiphilic Physically Crosslinked Segmented Copolymers

2021 ◽  
pp. 2100259
Author(s):  
Ezgi Bakirci ◽  
Andreas Frank ◽  
Simon Gumbel ◽  
Paul F. Otto ◽  
Eva Fürsattel ◽  
...  
Keyword(s):  
Segmented Copolymers ◽  
Physically Crosslinked

scholarly journals Antioxidant Network Based on Sulfonated Polyhydroxyalkanoate and Tannic Acid Derivative

2021 ◽  
Vol 8 (1) ◽  
pp. 9
Author(s):  
Laura Brelle ◽  
Estelle Renard ◽  
Valerie Langlois
Keyword(s):  
Gallic Acid ◽  
Tannic Acid ◽  
Water Soluble ◽  
Gel Formation ◽  
Ene Reaction ◽  
Inorganic Cations ◽  
Medium Chain Length ◽  
Physically Crosslinked ◽  
The Stability ◽  
Derivatives Of

A novel generation of gels based on medium chain length poly(3-hydroxyalkanoate)s, mcl-PHAs, were developed by using ionic interactions. First, water soluble mcl-PHAs containing sulfonate groups were obtained by thiol-ene reaction in the presence of sodium-3-mercapto-1-ethanesulfonate. Anionic PHAs were physically crosslinked by divalent inorganic cations Ca2+, Ba2+, Mg2+ or by ammonium derivatives of gallic acid GA-N(CH3)3+ or tannic acid TA-N(CH3)3+. The ammonium derivatives were designed through the chemical modification of gallic acid GA or tannic acid TA with glycidyl trimethyl ammonium chloride (GTMA). The results clearly demonstrated that the formation of the networks depends on the nature of the cations. A low viscoelastic network having an elastic around 40 Pa is formed in the presence of Ca2+. Although the gel formation is not possible in the presence of GA-N(CH3)3+, the mechanical properties increased in the presence of TA-N(CH3)3+ with an elastic modulus G’ around 4200 Pa. The PHOSO3−/TA-N(CH3)3+ gels having antioxidant activity, due to the presence of tannic acid, remained stable for at least 5 months. Thus, the stability of these novel networks based on PHA encourage their use in the development of active biomaterials.

Fully-physically crosslinked silk fibroin/poly(hydroxyethyl acrylamide) hydrogel with high transparency and adhesive properties for wireless sensing and low-temperature strain sensing

2021 ◽  
Vol 9 (6) ◽  
pp. 1880-1887
Author(s):  
Xia Sun ◽  
Shaoshuai He ◽  
Mengmeng Yao ◽  
Xiaojun Wu ◽  
Haitao Zhang ◽  
...  
Keyword(s):  
Low Temperature ◽  
Silk Fibroin ◽  
Temperature Sensing ◽  
Wireless Sensing ◽  
Strain Sensitivity ◽  
Strain Sensing ◽  
Adhesive Properties ◽  
High Transparency ◽  
Physically Crosslinked ◽  
Temperature Strain

Fully-physically crosslinked hydrogels with strain sensitivity and anti-freezing properties for wireless sensing and low temperature sensing were prepared.

Physically crosslinked injectable hydrogels for long-term delivery of oncolytic adenoviruses for cancer treatment

2019 ◽  
Vol 7 (10) ◽  
pp. 4195-4207 ◽  
Author(s):  
Thai Minh Duy Le ◽  
Bo-Kyeong Jung ◽  
Yi Li ◽  
Huu Thuy Trang Duong ◽  
Thanh Loc Nguyen ◽  
...  
Keyword(s):  
Cancer Treatment ◽  
Injectable Hydrogels ◽  
Injectable Hydrogel ◽  
Temperature Responsive ◽  
Oncolytic Adenoviruses ◽  
Term Delivery ◽  
Physically Crosslinked ◽  
Hydrogel System

A dual pH- and temperature-responsive physically crosslinked and injectable hydrogel system was developed for efficient and long-term delivery of oncolytic adenoviruses (Ads).

scholarly journals Super Bulk and Interfacial Toughness of Physically Crosslinked Double-Network Hydrogels

2017 ◽  
Vol 27 (44) ◽  
pp. 1703086 ◽  
Author(s):  
Hong Chen ◽  
Yonglan Liu ◽  
Baiping Ren ◽  
Yanxian Zhang ◽  
Jie Ma ◽  
...  
Keyword(s):  
Double Network ◽  
Interfacial Toughness ◽  
Physically Crosslinked

The control of cargo release from physically crosslinked hydrogels by crosslink dynamics

Biomaterials ◽  
2014 ◽  
Vol 35 (37) ◽  
pp. 9897-9903 ◽  
Author(s):  
Eric A. Appel ◽  
Rebecca A. Forster ◽  
Matthew J. Rowland ◽  
Oren A. Scherman
Keyword(s):  
Physically Crosslinked

scholarly journals Effect of Crosslinking Type on the Physical-Chemical Properties and Biocompatibility of Chitosan-Based Electrospun Membranes

Polymers ◽  
2021 ◽  
Vol 13 (5) ◽  
pp. 831
Author(s):  
Andrea Dodero ◽  
Sonia Scarfi ◽  
Serena Mirata ◽  
Alina Sionkowska ◽  
Silvia Vicini ◽  
...  
Keyword(s):  
Chemical Properties ◽  
Biological Properties ◽  
Diglycidyl Ether ◽  
Chemical Crosslinking ◽  
Electrospinning Technique ◽  
Vapour Permeability ◽  
Phosphate Ions ◽  
Physically Crosslinked ◽  
Mechanical Performances ◽  
Average Size

Chitosan nanofibrous membranes are prepared via an electrospinning technique and explored as potential wound healing patches. In particular, the effect of a physical or chemical crosslinking treatment on the mat morphological, mechanical, water-related, and biological properties is deeply evaluated. The use of phosphate ions (i.e., physical crosslinking) allows us to obtain smooth and highly homogenous nanofibers with an average size of 190 nm, whereas the use of ethylene glycol diglycidyl ether (i.e., chemical crosslinking) leads to rougher, partially coalesced, and bigger nanofibers with an average dimension of 270 nm. Additionally, the physically crosslinked mats show enhanced mechanical performances, as well as greater water vapour permeability and hydrophilicity, with respect to the chemically crosslinked ones. Above all, cell adhesion and cytotoxicity experiments demonstrate that the use of phosphate ions as crosslinkers significantly improves the capability of chitosan mats to promote cell viability owing to their higher biocompatibility. Moreover, tuneable drug delivery properties are achieved for the physically crosslinked mats by a simple post-processing impregnation methodology, thereby indicating the possibility to enrich the prepared membranes with unique features. The results prove that the proposed approach may lead to the preparation of cheap, biocompatible, and efficient chitosan-based nanofibers for biomedical and pharmaceutical applications.

NMR relaxation in poly(butylene terephthalate) and poly(butylene terephthalate) containing segmented copolymers. 5

1983 ◽  
Vol 16 (3) ◽  
pp. 409-415 ◽  
Author(s):  
Lynn W. Jelinski ◽  
Joseph J. Dumais ◽  
P. I. Watnick ◽  
M. D. Sefcik ◽  
A. Engel ◽  
...  
Keyword(s):  
Nmr Relaxation ◽  
Butylene Terephthalate ◽  
Segmented Copolymers

scholarly journals A facile method for synthesizing free-shaped and tough double network hydrogels using physically crosslinked poly(vinyl alcohol) as an internal mold

2010 ◽  
Vol 1 (5) ◽  
pp. 693 ◽  
Author(s):  
Tasuku Nakajima ◽  
Naoyuki Takedomi ◽  
Takayuki Kurokawa ◽  
Hidemitsu Furukawa ◽  
Jian Ping Gong
Keyword(s):  
Vinyl Alcohol ◽  
Poly Vinyl Alcohol ◽  
Internal Mold ◽  
Double Network ◽  
Physically Crosslinked
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