Synthesis and Characterization of a New Organic–Inorganic Hybrid Hydrogel by Using
Nanoparticles as an Initiator
Haiwang Wang ,
and Xiwei Qi
Materials and Metallurgical College, Northeastern University, Shenyang 110819, China
Hebei Provincial Laboratory for Dielectric and Electrolyte Materials, Northeastern University at Qinhuangdao,
Qinhuangdao 066004, China
Department of Materials Science and Engineering, Harbin Institute of Technology, Harbin 150080, China
Beijing National Laboratory for Molecular Sciences, Institute of Chemistry Chinese Academy of Sciences, Beijing
China Coal Information Institute, Beijing 100029, China
(Received: August 27, 2017; Accepted: October 26, 2017; Published Online: January 5, 2018; DOI: 10.1002/jccs.201700295)
A new type of organic–inorganic hybrid hydrogel (OIHH) was prepared under low air pressure
nanoparticles as initiator. The obtained OIHH shows a novel microstructure and char-
acteristics, which increased the salt resistance and water absorbance. We investigate the effects of
the reaction conditions on the absorption ability. The xerogel shows absorbance of 339.9 and
102.8 g/g for distilled water and for 0.9 wt% NaCl solution. Moreover, a reasonable microstruc-
ture of the superabsorbent polymer is shown.
Keywords: Surface-initiated; Polymerization; Nanoparticles; Hydrogel.
It is known that the microstructure of polymers
affect their characteristics greatly.
For example, San-
tin et al.
prepared a poly(HEMA)–gelatin composite
hydrogel using a sequential interpenetrating polymer
network (IPN) technique. The properties of these
hydrogels, such as biocompatibility, biodegradability,
improved greatly. Gong et al.
created tough double-
network (DN) gels, which exhibited excellent compres-
sive fracture strength and high Young’ modulus. The
synthesis schemes of both the IPN gel and the DN gel
consist of (1) gelation of rigid SPA (the ﬁrst network),
and (2) synthesis of the polymer (the second network)
in the ﬁrst network.
Therefore, it is attractive to design new hydrogels
with novel microstructures. For example, organic and
inorganic particles were added to the three-dimensional
polymer network, and new three-dimensional star net-
work structures were obtained. We also have reported a
unique property of nanoparticles to initiate acrylic acid
and acrylamide solution polymerization under low air
pressure. A wide variety of hybrid organic–inorganic
nanoparticles with three-dimensional star network
structures could be synthesized using this scheme.
Here we report the design and preparation of an
organic–inorganic hybrid hydrogel (OIHH) with a
novel microstructure using this property, which shows
high resistance to various salts. The product would
have applications in agriculture, soil improvement, and
plant growth. Particles of the superabsorbent polymer
distributed in the soil can absorb large volumes of
water, thereby efﬁciently improving the water-retaining
capacity of the soil and promoting optimal plant
growth. Numerous investigations have shown that this
concept is sound.
RESULTS AND DISCUSSION
The synthetic process involving the polymerization
of AM on the surface of SiO
nanoparticles, and the
subsequent cross-linking of the polymers under low air
pressure, is schematically shown in Figure 1. The mech-
anism underlying the protocol proposed in this study is
*Corresponding author. Email: firstname.lastname@example.org; email@example.com; firstname.lastname@example.org; email@example.com;
J. Chin. Chem. Soc. 2018, 65, 225–230
© 2018 The Chemical Society Located in Taipei & Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim
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