Journal
POLYMERS
Volume 12, Issue 1, Pages -Publisher
MDPI
DOI: 10.3390/polym12010140
Keywords
PDMS sponge; porous 3D matrix; artificial soil; seed germination; plant cultivation
Categories
Funding
- National Key Scientific Instrument and Equipment Development Projects of China [2013YQ03062909]
- Natural Science Foundation of Chongqing [cstc2019jcyj-msxmX0211]
- Applied Basic Research Program of Sichuan Province [19YJC0975, 2018GZYZF0008]
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In this work, a citric acid monohydrate (CAM)-templated polydimethylsiloxane (PDMS) sponge was proposed to mimic heterogeneous pore structures in the soil for plant cultivation. The porosity of the PDMS sponges was tuned by adjusting the CAM template. The water intake capability of the sponge was improved by (3-Aminopropyl) triethoxysilane (APTES) functionalization. The pore size and pore distribution were characterized by SEM and micro-computed tomography (micro-CT). The effect of pore structures on Oryzasativa (O. sativa) growth was investigated. Also, a 3D multi-layer PDMS sponge assembling was proposed to mimic the heterogeneous pore distribution at the different soil depth. The different growth rates of O. sativa and Nicotiana tabacum L. (N. tabacum) seeds on porous PDMS sponge indicated the impact of physical obstacles (pores) and chemical (water content) conditions on plant development. It is anticipated that this PDMS sponge could serve as a 3D matrix to mimic soil and provide a new idea for plant cultivation.
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