亲水性多孔聚二甲基硅氧烷海绵作为一种模拟土壤中异质孔隙的新型三维基质用于植物栽培。

Hydrophilic Porous Polydimethysiloxane Sponge as a Novel 3D Matrix Mimicking Heterogeneous Pores in Soil for Plant Cultivation.

作者信息

Chen Feng, Chai Huihui, Song Zhaoxi, Yu Ling, Fang Can

机构信息

Key Laboratory of Luminescent and Real-Time Analytical Chemistry (Southwest University), Ministry of Education, Institute for Clean Energy and Advanced Materials, Faculty of Materials and Energy, Southwest University, Chongqing 400715, China.

School of Computer Science and Software Engineering, Southwest University, Chongqing 400715, China.

出版信息

Polymers (Basel). 2020 Jan 6;12(1):140. doi: 10.3390/polym12010140.

DOI:10.3390/polym12010140

PMID:31935876

原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC7023002/

Abstract

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 () 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 and () 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.

摘要

在这项工作中，提出了一种以一水柠檬酸（CAM）为模板的聚二甲基硅氧烷（PDMS）海绵，以模拟土壤中的非均质孔隙结构用于植物栽培。通过调整CAM模板来调节PDMS海绵的孔隙率。通过（3-氨丙基）三乙氧基硅烷（APTES）功能化提高了海绵的吸水能力。用扫描电子显微镜（SEM）和微型计算机断层扫描（micro-CT）对孔径和孔隙分布进行了表征。研究了孔隙结构对（）生长的影响。此外，还提出了一种3D多层PDMS海绵组装体，以模拟不同土壤深度的非均质孔隙分布。（）种子和（）种子在多孔PDMS海绵上不同的生长速率表明了物理障碍（孔隙）和化学（含水量）条件对植物发育的影响。预计这种PDMS海绵可以作为一种模拟土壤的3D基质，为植物栽培提供新思路。