Modified corn stalk carboxymethyl cellulose, acrylic acid and SBA‐15 based composite hydrogel used for agricultural water retention

Abstract

SBA‐15 is successfully incorporated into a composite superabsorbent hydrogel polymer (SAHP) by in situ graft polymerization of acrylic acid (AA) on a carboxymethyl cellulose (CMC) backbone using SBA‐15 as a filler. The structure and properties of the SAHPs are studied in detail by means of a variety of characterization methods, including Fourier transform infrared spectroscopy, X‐ray diffraction, and field emission scanning electron microscopy. And the effects of the originating mate‐rials (such as SBA‐15, initiator, cross‐linker, ratio of CMC to AA, and neutralization of AA) and pH on the water absorption properties are discussed. The obtained results show that the introduction of SBA‐15 have significant effect on the intrinsic structure of the superabsorbent. Importantly, the composite SAHP exhibit higher thermal stability and significant swelling as well as water retention capacity. The prepared SAHP show good sensitivity to various surfactant solutions, which not only have water retention applications in agriculture but also show potential applications in the field of biomaterials.

Preparation and Properties of Attapulgite-Hydroxyethyl Cellulose Composite Poly (Acrylic Acid-co-2-acrylamide-2-methylpropanesulfonic Acid) Concrete Internal Curing Material

“…However, it can be copolymerized with non-ionic groups (such as acrylamide) to improve the salt-resistant properties of waterabsorbing polymers [16,17]. To address the shortcomings of traditional synthetic high water-absorbent polymers, natural polysaccharide-modified water-absorbent materials, including cellulose [18,19], starch [20], sodium alginate [21], and chitosan [11], have been developed in recent years. These water-absorbent materials possess advantages such as degradability, renewability, good affinity, low cost, etc., resulting in better application prospects.…”