Hydrogels as the plant culture substrates: A review

Ma, Lin; Chai, Chunxiao; Wu, Wenna; Pan, Qi; Liu, Xingcen; Hao, Jingcheng

doi:10.1016/j.carbpol.2023.120544

Cited by 30 publications

(13 citation statements)

References 123 publications

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“…The weight parameters were significantly lower when the AC12 hydrogel was used as compared to the control condition. It is expected that the microstructure of hydrogels improves the water availability and airflow through the system, reducing the drought stress and aeration problems for plants, respectively . For PVA/HA hydrogels, the heterogeneous porous structure of the PVA network formed by adding GA seems to promote the growth and storage of seedlings, as compared to the behavior of autoclaved hydrogels with lower pore dimensions and a highly uniform pore distribution.…”

Section: Resultsmentioning

confidence: 99%

“…8−10 Poly(vinyl alcohol) (PVA) is a candidate for plant growth substrate uses. 11 PVA-based hydrogels have been widely developed owing to the feasible tune of their preparation methods, low toxicity, high water absorption, and mechanical stability. 7 Typically, PVA hydrogels have been prepared by physical cross-linking, through a series of freeze−thaw cycles and anneal-swell, or by adding chemical cross-linking agents, such as bifunctional aldehydes.…”

Section: ■ Introductionmentioning

confidence: 99%

“…Poly(vinyl alcohol) (PVA) is a candidate for plant growth substrate uses . PVA-based hydrogels have been widely developed owing to the feasible tune of their preparation methods, low toxicity, high water absorption, and mechanical stability .…”

Section: Introductionmentioning

confidence: 99%

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Physically and Chemically Cross-Linked Poly(vinyl alcohol)/Humic Acid Hydrogels for Agricultural Applications

Torres-Figueroa,

de los Santos-Villalobos,

Rodríguez-Félix

et al. 2023

ACS Omega

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The preparation method of hydrogels has a significant effect on their structural and physicochemical properties. In this report, physically and chemically cross-linked poly(vinyl alcohol) (PVA) networks containing humic acid (HA) were alternatively prepared by autoclaving (AC) and through glutaraldehyde (GA) addition, respectively, for agricultural purposes. PVA/HA hydrogels were comparatively characterized by Fourier transform infrared spectroscopy, thermogravimetric analysis, mechanical assays, scanning electron microscopy, swelling kinetics measurements, and water retention tests in soil. AC hydrogels showed a more homogeneous porous microstructure, higher swelling levels, and a better capacity to preserve the humidity of soil than those obtained by adding GA. Both PVA/HA hydrogels exhibited no phytotoxicity on cultivation trials of Sorghum sp., but the plant growth was promoted with the GA-cross-linked network as compared to the effect of the AC sample. The release behavior of urea was modified according to the preparation method of the PVA/HA hydrogels. After 3 days of sustained urea release, 91% of the fertilizer was delivered from the AC hydrogel, whereas a lower amount of 56% was released for the GA-cross-linked hydrogel. Beyond the advantages of applying PVA/HA hydrogels in the agricultural field, an appropriate method of preparing these materials endows them with specific properties according to the requirements of the target crop.

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Section: Resultsmentioning

confidence: 99%

Section: ■ Introductionmentioning

confidence: 99%

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Physically and Chemically Cross-Linked Poly(vinyl alcohol)/Humic Acid Hydrogels for Agricultural Applications

Torres-Figueroa,

de los Santos-Villalobos,

Rodríguez-Félix

et al. 2023

ACS Omega

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“…Conductive hydrogels have recently received notable attention due to their numerous advantages, such as their excellent stretchability, 1 high flexibility, soft-and-wet nature, 2,3 mechanical deformation, and environmental stimuli that can be converted into electrical signals. 4−7 These superior characteristics have allowed them to be ideal candidates for diverse applications such as human−machine interfaces, 8 soft robots, 9 electrochromic devices, 10 supercapacitors, 11,12 implantable biosensors, 13 electrostimulated drug release units, 14 plant culture substrate, 15 human health monitoring, 16−18 tissue repair materials, 19,20 and artificial skin. 21 The preparation methods, however, have always been burdened by laborious and time-consuming manufacturing processes, 22 as well as the additional input of external energy, to satisfy all of these stringent requirements.…”

Section: ■ Introductionmentioning

confidence: 99%

“…Conductive hydrogels have recently received notable attention due to their numerous advantages, such as their excellent stretchability, high flexibility, soft-and-wet nature, , mechanical deformation, and environmental stimuli that can be converted into electrical signals. − These superior characteristics have allowed them to be ideal candidates for diverse applications such as human–machine interfaces, soft robots, electrochromic devices, supercapacitors, , implantable biosensors, electrostimulated drug release units, plant culture substrate, human health monitoring, − tissue repair materials, , and artificial skin . The preparation methods, however, have always been burdened by laborious and time-consuming manufacturing processes, as well as the additional input of external energy, to satisfy all of these stringent requirements. − For example, the preparation strategy for polyacrylic acid (PAA)-based conductive hydrogels usually requires lots of time and energy for the cleavage of initiators such as ammonium persulfate (APS) to initiate the polymerization reaction. − Especially, the prepared hydrogels displayed a huge deformation and even damage when exposed to external forces, which greatly reduced their sensitivity and service life. , To address this issue, the development of self-healing hydrogels has been extensively studied by introducing dynamic covalent bonding into the hydrogel network. , Due to their dynamic qualities and simplicity of synthesis, boronate ester linkages generated by the interaction of boronic acid with cis -diols have been frequently employed to prepare multifunctional hydrogels. , Lin et al, for example, reported a multiple sensing hydrogel via boronic ester bonds based on Ag/TA/CNC nanohybrids, PVA, and borax.…”

Section: Introductionmentioning

confidence: 99%

Simple and Rapid Way to a Multifunctionally Conductive Hydrogel for Wearable Strain Sensors

Miao

et al. 2023

Langmuir

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Conductive hydrogels have gained increasing attention in the field of wearable smart devices. However, it remains a big challenge to develop a multifunctionally conductive hydrogel in a rapid and facile way. Herein, a conductive tannic acid–iron/poly (acrylic acid) hydrogel was synthesized within 30 s at ambient temperature by the tannic acid–iron (TA@Fe3+)-mediated dynamic catalytic system. The TA@Fe3+ dynamic redox autocatalytic pair could efficiently activate the ammonium persulfate to initiate the free-radical polymerization, allowing the gelation to occur easily and rapidly. The resulting hydrogel exhibited enhanced stretchability (3560%), conductivity (33.58 S/m), and strain sensitivity (gauge factor = 2.11). When damaged, it could be self-healed through the dynamic and reversible coordination bonds between the Fe3+ and COO– groups in the hydrogel network. Interestingly, the resulting hydrogel could act as a strain sensor to monitor various human motions including the huge movement of deformations (knuckle, wrist) and subtle motions (smiling, breathing) in real time due to its enhanced self-adhesion, good conductivity, and improved strain sensitivity. Also, the obtained hydrogel exhibited efficient electromagnetic interference (EMI) shielding performance with an EMI shielding effectiveness value of 24.5 dB in the X-band (8.2–12.4 GHz). Additionally, it displayed antibacterial properties, with the help of the activity of TA.

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Vat Photopolymerization 3D Printing Hydrogels and Bionic Adhesive Devices: A Minireview

Shi,

Wang,

et al. 2024

Adv Materials Technologies

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Vivid biological structures with reversible adhesive properties are widely found in nature. Although current biomimicking adhesion systems have attracted extensive attention, unmet challenges remain in terms of excellent adhesion preservation, precise structural fabrication, and good environmental compatibility. By combining advanced vat photopolymerization 3D printing technology with hydrogel materials with excellent environmental adaptability, bioinspired adhesion devices present satisfactory application prospects. Herein, a systematic overview of bioinspired hydrogel adhesion devices from the perspectives of material design, structural design, and fabrication is presented. First, the main types and application prospects of vat photopolymerization 3D printed hydrogels are introduced. Subsequently, the research progress on hydrogel‐based vat photopolymerized 3D printed bionic adhesion devices is detailed. Future developments, such as balancing unmet challenges and expected opportunities, in 3D printable multiscale bionic adhesive devices are presented.

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Hydrogels as the plant culture substrates: A review

Cited by 30 publications

References 123 publications

Physically and Chemically Cross-Linked Poly(vinyl alcohol)/Humic Acid Hydrogels for Agricultural Applications

Physically and Chemically Cross-Linked Poly(vinyl alcohol)/Humic Acid Hydrogels for Agricultural Applications

Simple and Rapid Way to a Multifunctionally Conductive Hydrogel for Wearable Strain Sensors

Vat Photopolymerization 3D Printing Hydrogels and Bionic Adhesive Devices: A Minireview

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