scholarly journals Starch-Based Super Water Absorbent: A Promising and Sustainable Way to Increase Survival Rate of Trees Planted in Arid Areas

Polymers ◽  
2021 ◽  
Vol 13 (8) ◽  
pp. 1314
Author(s):  
Pattra Lertsarawut ◽  
Thitirat Rattanawongwiboon ◽  
Theeranan Tangthong ◽  
Sakchai Laksee ◽  
Tanagorn Kwamman ◽  
...  
Keyword(s):  
Survival Rate ◽  
Graft Polymerization ◽  
Scale Up ◽  
Chemical Characterization ◽  
Field Tests ◽  
Thermal Characterization ◽  
Agricultural Applications ◽  
Radiation Induced ◽  
Porous Morphology ◽  
Highly Porous

This research aimed to scale up the production of starch-based super water absorbent (SWA) and to validate the practical benefits of SWA for agricultural applications. SWA was successfully prepared in an up-scaling production by radiation-induced graft polymerization of acrylic acid onto cassava starch. Chemical characterization by FTIR and thermal characterization by TGA showed results that differentiated starting materials from the prepared SWA, thus confirming effective preparation of starch-based SWA via radiation-induced graft polymerization. SEM results visibly revealed a highly porous morphology of the synthesized SWA, substantiating its high swelling ability. Results from the field tests, performed for two seasons, revealed that the prepared SWA was able to increase the survival rate of young rubber trees planted in arid area by up to 40%, while simultaneously enhancing the growth characteristics of the young rubber trees.

scholarly journals Radiation-Induced Asymmetric Grafting of Different Monomers into Base Films to Prepare Novel Bipolar Membranes

Molecules ◽  
2021 ◽  
Vol 26 (7) ◽  
pp. 2028
Author(s):  
Shin-ichi Sawada ◽  
Yasunari Maekawa
Keyword(s):  
Acrylic Acid ◽  
Anion Exchange ◽  
Graft Polymerization ◽  
The Other ◽  
Practical Applications ◽  
Bipolar Membranes ◽  
Graft Polymers ◽  
Grafting Reactions ◽  
Radiation Induced

We prepared novel bipolar membranes (BPMs) consisting of cation and anion exchange layers (CEL and AEL) using radiation-induced asymmetric graft polymerization (RIAGP). In this technique, graft polymers containing cation and anion exchange groups were introduced into a base film from each side. To create a clear CEL/AEL boundary, grafting reactions were performed from each surface side using two graft monomer solutions, which are immiscible in each other. Sodium p-styrenesulfonate (SSS) and acrylic acid (AA) in water were co-grafted from one side of the base ethylene-co-tetrafluoroethylene film, and chloromethyl styrene (CMS) in xylene was simultaneously grafted from the other side, and then the CMS units were quaternized to afford a BPM. The distinct SSS + AA- and CMS-grafted layers were formed owing to the immiscibility of hydrophilic SSS + AA and hydrophobic CMS monomer solutions. This is the first BPM with a clear CEL/AEL boundary prepared by RIAGP. However, in this BPM, the CEL was considerably thinner than the AEL, which may be a problem in practical applications. Then, by using different starting times of the first SSS+AA and second CMS grafting reactions, the CEL and AEL thicknesses was found to be controlled in RIAGP.

scholarly journals Radiation-Induced Graft Polymerization of Acrylonitrile onto Poly(vinyl chbride) Film

1973 ◽  
pp. 1188-1194
Author(s):  
Shoji HASHIMOTO ◽  
Akira UDAGAWA ◽  
Eiichi KAGEYAMA
Keyword(s):  
Graft Polymerization ◽  
Radiation Induced

Design of urea-permeable anion-exchange membrane by radiation-induced graft polymerization

1993 ◽  
Vol 81 (3) ◽  
pp. 295-305 ◽  
Author(s):  
William Lee ◽  
Kyoichi Saito ◽  
Shintaro Furusaki ◽  
Takanobu Sugo ◽  
Keizo Makuuchi
Keyword(s):  
Anion Exchange ◽  
Graft Polymerization ◽  
Anion Exchange Membrane ◽  
Radiation Induced ◽  
Exchange Membrane

scholarly journals Development of an Adsorbent for Cs Removal Synthesized by Radiation-Induced Graft Polymerization

2015 ◽  
Vol 26 (1) ◽  
pp. 9-14 ◽  
Author(s):  
Takuya SHIBATA ◽  
Noriaki SEKO ◽  
Haruyo AMADA ◽  
Noboru KASAI ◽  
Seiichi SAIKI ◽  
...  
Keyword(s):  
Graft Polymerization ◽  
Radiation Induced

scholarly journals Application of proton beams to radiation-induced graft polymerization for making amidoxime-type adsorbents

2004 ◽  
Vol 69 (2) ◽  
pp. 171-178 ◽  
Author(s):  
Akira Kitamura ◽  
Shimpei Hamamoto ◽  
Akira Taniike ◽  
Yusuke Ohtani ◽  
Naoyoshi Kubota ◽  
...  
Keyword(s):  
Graft Polymerization ◽  
Proton Beams ◽  
Radiation Induced
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