911968
Alginate methacrylate
Low viscosity, degree of methacrylation: 10-30%
Synonym(s):
AlMA, Alginate, AlginateMA, Algini acid, Methacrylate-modified alginate, Sodium alginate
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About This Item
Linear Formula:
(NaC13H17O10)m (NaC6H7O7)n
UNSPSC Code:
12352201
form
powder or solid (fluffy)
mol wt
~75 kDa (Alginate)
color
white to off-white
suitability
conforms to structure for NMR
storage temp.
−20°C
Application
Alginate is an anionic polysaccharide that is widely used in pharmaceutical and biomedical applications due to its non-animal origin, low toxicity, biocompatibility, and biodegradability. Alginate hydrogels are commonly used to fabricate tissue engineering scaffolds, bioinks for 3D bioprinting, and nanocarriers for drug & gene delivery. While alginate is commonly crosslinked into a hydrogel via ionic-crosslinking with divalent cations (e.g., Ca2+), these gels feature limited long-term stability due to exchange reactions and migration of divalent cations from the alginate matrix. To prevent matrix degradation, alginate can be functionalized with reactive groups that can be chemically crosslinked, such as methacrylates. Methacrylate-functionalized alginate can be used to prepare hydrogels by thermal or photochemical crosslinking of the terminal methacrylates. Properties of the resulting hydrogel (e.g., stiffness, swelling ratio, rate of degradation) can be tuned by alginate molecular weight, degree of methacrylate functionalization, and crosslink density.
Storage Class Code
11 - Combustible Solids
WGK
WGK 3
Flash Point(F)
Not applicable
Flash Point(C)
Not applicable
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Alginate: properties and biomedical applications
Lee K Y, et al.
Progress in Polymer Science, 37(1), 106-126 (2012)
Engineering alginate as bioink for bioprinting
Jia J, et al.
Acta Biomaterialia, 10(10), 4323-4331 (2014)
K A Smeds et al.
Journal of biomedical materials research, 54(1), 115-121 (2000-11-15)
In situ photopolymerization is an exciting new technique for tissue engineering. Two photocrosslinkable polysaccharides composed of alginate and hyaluronan are described that upon photolysis form soft, flexible, and viscoelastic hydrogels. The degree of methacrylate modification and thus covalent affects mechanical
Siddhesh N Pawar et al.
Biomaterials, 33(11), 3279-3305 (2012-01-28)
Alginates have become an extremely important family of polysaccharides because of their utility in preparing hydrogels at mild pH and temperature conditions, suitable for sensitive biomolecules like proteins and nucleic acids, and even for living cells such as islets of
Andrew D Rouillard et al.
Tissue engineering. Part C, Methods, 17(2), 173-179 (2010-08-14)
Methods for seeding high-viability (>85%) three-dimensional (3D) alginate-chondrocyte hydrogel scaffolds are presented that employ photocrosslinking of methacrylate-modified alginate with the photoinitiator VA-086. Comparison with results from several other photoinitiators, including Irgacure 2959, highlights the role of solvent, ultraviolet exposure, and
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