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Gels publishes Special Issues to create collections of papers on specific topics, with the aim of building a community of authors and readers to discuss the latest research and develop new ideas and research directions. Special Issues are led by Guest Editors, who are experts on the topic and all Special Issue submissions follow MDPI's standard editorial process. The journal’s Editor-in-Chief and/or designated Editorial Board Member will oversee Guest Editor appointments and Special Issue proposals, checking their content for relevance and ensuring the suitability of the material for the journal. The papers published in a Special Issue will be collected and displayed on a dedicated page of the journal’s website. Further information on MDPI's Special Issue policies and Guest Editor responsibilities can be found here. For any inquiries related to a Special Issue, please contact the Editorial Office.

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Gel-Based Materials for Intelligent Sensors and Self-Powered Nanogenerators

edited by

Vineet Kumar

and

Sang-Shin Park

submission deadline 20 Nov 2025 | 9 articles | Viewed by 11833 | Submission Open

Keywords: ionogels; organogels; and soft elastomers; carbon nanomaterials; smart sensing; self-powered nanogenerators; Internet of Things; real-time monitoring

(This special issue belongs to the Section Gel Applications)

Development and Applications of Advanced Geopolymer Gel Materials

edited by

Marija Ivanovic

and

Miloš Nenadović

submission deadline 20 Nov 2025 | 2 articles | Viewed by 1108 | Submission Open

Keywords: synthesis; advanced materials; waste materials; hydrogel; nanomaterials; porous materials; characterization; wastewater treatment; environmental protection; construction application

(This special issue belongs to the Section Gel Analysis and Characterization)

Advanced Gels for Oil Recovery (2nd Edition)

edited by

Han Jia

and

Mingwei Zhao

submission deadline 25 Nov 2025 | 5 articles | Viewed by 8489 | Submission Open

Keywords: application of polymer gels in improved oil recovery; theory of polymer gels in improved oil recovery; synthesis and characterization of advanced polymer gels; structure-property relationships of novel polymer; unconventional oil and gas exploration and development

(This special issue belongs to the Section Gel Applications)

Advanced Hydrogels for Regenerative Medicine and Tissue Engineering (3rd Edition)

edited by

Wen Shi

Shixuan Chen

and

Bo Liu

submission deadline 30 Nov 2025 | 6 articles | Viewed by 25831 | Submission Open

Keywords: hydrogels; tissue engineering; regenerative medicine; 3D bioprinting; multifunctional; disease models; scaffolds; stem cells; extracellular matrix

(This special issue belongs to the Section Gel Applications)

Recent Research on Alginate Hydrogels in Bioengineering Applications

edited by

Magdalena Łabowska

Jerzy Detyna

and

Patrycja Szymczyk-Ziółkowska

submission deadline 30 Nov 2025 | 6 articles | Viewed by 22992 | Submission Open

Keywords: alginate hydrogel; smart hydrogels; bioresponsive hydrogels; processing of hydrogels; material properties; bioengineering applications; biomedical applications

(This special issue belongs to the Section Gel Applications)

Alginate-Based Gels: Preparation, Characterization and Application (2nd Edition)

edited by

Cheng Hu

and

Kongyin Zhao

submission deadline 30 Nov 2025 | 6 articles | Viewed by 12065 | Submission Open

Keywords: alginate hydrogel ; alginate gel ; alginate composite material; synthesis and characterization of alginate; applications of alginate; theory and simulation of alginate

(This special issue belongs to the Section Gel Applications)

Design and Optimization of Pharmaceutical Gels (2nd Edition)

edited by

Zhengwei Huang

Ying Huang

and

Xuanjuan Zhang

submission deadline 30 Nov 2025 | 3 articles | Viewed by 10330 | Submission Open

Keywords: gelation materials; novel gel-based delivery systems; intelligent hydrogels; in situ gels; emulsion gels; nanogels; vesicular gels; microgels

(This special issue belongs to the Section Gel Applications)

Polysaccharide Gels for Biomedical and Environmental Applications

edited by

Ioana A. Duceac

Jana Čopíková

and

Sergiu Coseri

submission deadline 30 Nov 2025 | 7 articles | Viewed by 10120 | Submission Open

Keywords: natural and modified polysaccharides; dynamic and photoreactive crosslinks; (nano)gels; gel composites and 3D-printed constructs; structure– property– application relationships; drug delivery and diagnosis in cancer and other diseases; wound dressing and tissue engineering; sensors; environmental applications

(This special issue belongs to the Section Gel Applications)

Advances in Chitin- and Chitosan-Based Hydrogels (2nd Edition)

edited by

Xinjian Cheng

submission deadline 30 Nov 2025 | 4 articles | Viewed by 8950 | Submission Open

Keywords: chitin; chitosan; chitin/chitosan derivatives; hydrogels; (nano)composites; tissue engineering; drug delivery; chitosan applications

(This special issue belongs to the Section Gel Applications)

Functional Gels for Dental Applications

edited by

Pedro C. Lopes

Željka Vanić

and Anna Carolina Volpi Mello-Moura

submission deadline 30 Nov 2025 | 4 articles | Viewed by 8824 | Submission Open

Keywords: functional gels; hydrogels; biomaterials; dental applications; oral disease prevention; regenerative dentistry

(This special issue belongs to the Section Gel Processing and Engineering)

Edible Coatings and Film: Gel-Based Innovations

edited by

Roberta Passafiume

Ilenia Tinebra

and

Vittorio Farina

submission deadline 30 Nov 2025 | 3 articles | Viewed by 7067 | Submission Open

Keywords: gel-based materials; edible coatings; food preservation; sustainable packaging; biopolymers; active packaging; intelligent packaging; food quality; shelf-life extension; environmental impact; food safety

(This special issue belongs to the Section Gel Applications)

Properties and Structure of Plant-Based Emulsion Gels

edited by Cynthia Fontes-Candia,

Daniel Alexander Méndez Reyes

and

Olaf Holderer

submission deadline 30 Nov 2025 | 3 articles | Viewed by 6231 | Submission Open

Keywords: emulsion gels; food application; fat replacers; lipid carriers; bioactive carriers; biopolymers; encapsulation; novel characterization methods; molecular modelling; multi-scale characterization

(This special issue belongs to the Section Gel Analysis and Characterization)

Advances in Protein Gels and Their Applications

edited by Qi Han and Junhua Li

submission deadline 30 Nov 2025 | 3 articles | Viewed by 6007 | Submission Open

Keywords: protein gels; protein structure; protein aggregation; hydrogels; gelling properties

(This special issue belongs to the Section Gel Applications)

Characterization Techniques for Hydrogels and Their Applications

edited by

Juan Manuel Lázaro-Martínez

submission deadline 30 Nov 2025 | 5 articles | Viewed by 5394 | Submission Open

Keywords: characterization; spectroscopies; NMR; XPS; mechanical properties

(This special issue belongs to the Section Gel Analysis and Characterization)

Polymer Aerogels and Aerogel Composites

edited by

Haiquan Guo

and

Baochau N. Nguyen

submission deadline 30 Nov 2025 | 4 articles | Viewed by 4432 | Submission Open

Keywords: aerogels; novel polymer aerogels; aerogel composites; structure-to-property relationship; characterization; applications

(This special issue belongs to the Section Gel Processing and Engineering)

Research and Application of Injectable Hydrogels

edited by

Hongwei Cheng

and

Zibiao Li

submission deadline 30 Nov 2025 | 1 articles | Viewed by 1998 | Submission Open

Keywords: injectable hydrogel; biomechanics drug delivery; stimuli-responsive hydrogel; theranostics

(This special issue belongs to the Section Gel Applications)

Current Research on Eutectogels

edited by

Liane Meneses

and

Ana Rita Xavier De Jesus Gameiro

submission deadline 30 Nov 2025 | 1 articles | Viewed by 1587 | Submission Open

Keywords: eutectogel; gel; deep eutectic solvents; polymer; biomaterials; applications

(This special issue belongs to the Section Gel Applications)

Sustainable Functional Hydrogels in Flexible Electronics, Energy and Thermoelectrics

edited by

Leire Ruiz-Rubio

and

Mario Culebras

submission deadline 30 Nov 2025 | 1 articles | Viewed by 1391 | Submission Open

Keywords: functional hydrogels; flexible electronic; sensor and actuators; thermoelectric; energy; batteries

(This special issue belongs to the Section Gel Analysis and Characterization)

Hydrogels for Bone Regeneration (2nd Edition)

edited by

Jennifer Z. Paxton

submission deadline 30 Nov 2025 | 2 articles | Viewed by 672 | Submission Open

Keywords: hydrogels; polymer gels; bone; bone regeneration; bone tissue engineering; osteoblasts; osteoclasts

(This special issue belongs to the Section Gel Applications)

Advancements in Biopolymer-Based Functional Hydrogels for Intelligent Wearable Devices and Textiles

edited by Hong Zhao and

Kindness Alfred Uyanga

submission deadline 30 Nov 2025 | 1 articles | Viewed by 524 | Submission Open

Keywords: biopolymer-based hydrogels; sustainable microstructure designs; intelligent wearables

(This special issue belongs to the Section Gel Applications)

Biopolymeric Hydrogels for Drug Delivery and Tissue Regeneration

edited by Nairrita Majumder and Nandita Das

submission deadline 30 Nov 2025 | Viewed by 198 | Submission Open

Keywords: gels; hydrogels; wound healing; chronic wounds; burn; tissue scaffolding; tissue engineering; anti-microbial applications

(This special issue belongs to the Section Gel Applications)

Food Gels: Structure and Application

edited by

Monika Jokūbaitė

and Kristina Ramanauskienė

submission deadline 30 Nov 2025 | Viewed by 188 | Submission Open

Keywords: food gels; proteins; polysaccharides; lipids; formulation and structure design; structure– property relationship; gel-based foods

(This special issue belongs to the Section Gel Processing and Engineering)

Recent Development and Theoretical View of Physical Gels

edited by

Di Jia

and

Pablo H. Di Chenna

submission deadline 30 Nov 2025 | Viewed by 165 | Submission Open

Keywords: physical gels; mechanical strength; resilience; responsiveness; drug delivery; tissue engineering; food technology

(This special issue belongs to the Section Gel Analysis and Characterization)

Innovative Gels: Structure, Properties, and Emerging Applications

edited by

Teodora Staicu

and

Marin Micutz

submission deadline 20 Dec 2025 | 4 articles | Viewed by 5569 | Submission Open

Keywords: hydrogels; organogels; gel characterization; gel properties; gel applications

(This special issue belongs to the Section Gel Analysis and Characterization)

Hydrogel-Based Scaffolds with a Focus on Medical Use (3rd Edition)

edited by

Federica Re

and

Elisa Borsani

submission deadline 20 Dec 2025 | 3 articles | Viewed by 3955 | Submission Open

Keywords: hydrogel-based scaffolds; resorbable scaffolds; synthesis of biomaterials; mesenchymal stromal cells; bioengineered models; bone regeneration; cartilage regeneration; skin regeneration

(This special issue belongs to the Section Gel Applications)

Synthesis and Applications of Hydrogels (3rd Edition)

edited by

Jun Huang

submission deadline 20 Dec 2025 | 3 articles | Viewed by 2977 | Submission Open

Keywords: biomaterials; sensors and actuators; adhesives; flexible electronics; 3D printing; drug delivery; network

(This special issue belongs to the Section Gel Chemistry and Physics)

Gels for Energy Applications

edited by Panpan Zhao and

Miguel Sanchez-Soto

submission deadline 20 Dec 2025 | 2 articles | Viewed by 2407 | Submission Open

Keywords: gels; bio-based materials; phase change materials; energy storage/release; thermal management

(This special issue belongs to the Section Gel Applications)

Advances in Cellulose-Based Gels

edited by

Danica Zmejkoski

and

Ksenija Radotić

submission deadline 20 Dec 2025 | 1 articles | Viewed by 416 | Submission Open

Keywords: biomedical applications; drug delivery systems; functional biomaterials; environmental application; electrochemical materials; coatings and films; sustainable materials

(This special issue belongs to the Section Gel Chemistry and Physics)

Natural Bioactive Compounds and Gels

edited by

and

submission deadline 25 Dec 2025 | 4 articles | Viewed by 20067 | Submission Open

Keywords: polyphenols; bioactive compounds; HPLC; biological activity; gelling agents; food fortification; functional additives; bioavailability; active coatings; micro- and nanocapsules; carbohydrates; hydrocolloids; rheology; thixotropy

(This special issue belongs to the Section Gel Applications)

Gels: 10th Anniversary

edited by

Esmaiel Jabbari

and

Gulden Camci-Unal

submission deadline 31 Dec 2025 | 13 articles | Viewed by 25334 | Submission Open

Keywords: hydrogels with hierarchical and self-assembled structures; environmentally sustainable; compatible and resorbable hydrogels; load-bearing and self-healing hydrogels; hydrogels for cell encapsulation and bio-fabrication; hydrogels for micro-patterning; micro-fluidic devices and high-throughput screening; hydrogels for injectable; in situ gelling and minimally invasive applications; hydrogels for modulating the immune response; hydrogels for spatiotemporal delivery of growth factors; particulate; nano- and micro-structured hydrogels for drug delivery; hydrogels for protein; RNA and DNA delivery; hydrogels in medicine; biotechnology and pharmacy; hydrogels in tissue engineering and regenerative medicine; hydrogels in cosmetics; hygiene and personal care products; hydrogels in agriculture; food production and eco-friendly applications; hydrogels in electro-magneto-mechanical devices; hydrogels in oil and gas exploration; hydrogels in energy applications; hydrogel in chemical processing

(This special issue belongs to the Section Gel Applications)

Advanced Hydrogels for Tissue Engineering and Drug Delivery (2nd Edition)

edited by

Jin-Oh Jeong

submission deadline 31 Dec 2025 | 3 articles | Viewed by 22923 | Submission Open

Keywords: biomaterial; hydrogel; tissue engineering; smart drug delivery; biopolymers

(This special issue belongs to the Section Gel Applications)

Thixotropic Gels: Mechanisms, Functions and Applications

edited by

Nataša Šijaković Vujičić

and

Anabela Raymundo

submission deadline 31 Dec 2025 | 6 articles | Viewed by 17238 | Submission Open

Keywords: thixotropy; self-assembly; organogels; rheology; applications; 3D-printing gels

(This special issue belongs to the Section Gel Analysis and Characterization)

Recent Advances in Biopolymer Gels (2nd Edition)

edited by

Luis Morales-Quintana

and

Milton Vázquez-Lepe

submission deadline 31 Dec 2025 | 6 articles | Viewed by 11418 | Submission Open

Keywords: synthesis and characterization of biodegradable biopolymers; approaches for biodegradable biopolymers (wastewater treatment); biodegradable biopolymeric material with properties of detoxification; bioremediation; or bio-absorption; biopolymer gels in the food industry; biopolymer gels for controlled release

(This special issue belongs to the Section Gel Analysis and Characterization)

Smart Hydrogel for Wound Healing and Tissue Repair

edited by Xiayi Xu and Boguang Yang

submission deadline 31 Dec 2025 | 2 articles | Viewed by 9721 | Submission Open

Keywords: hydrogel; wound healing; tissue repair; stimuli-responsive; wound dressing; regenerative medicine; biomedical application; anti-inflammation; biomaterials; bio-adhesion

(This special issue belongs to the Section Gel Analysis and Characterization)

Gel-Based Materials for Sensing and Monitoring

edited by

Xiao Li

submission deadline 31 Dec 2025 | 4 articles | Viewed by 9531 | Submission Open

Keywords: gel-based materials; wearable sensors; stimuli-responsive gels; self-healing materials; biocompatibility; real-time monitoring

(This special issue belongs to the Section Gel Applications)

State-of-the Art Gel Research in USA

edited by

Esmaiel Jabbari

and

Nasim Annabi

submission deadline 31 Dec 2025 | 3 articles | Viewed by 9421 | Submission Open

Keywords: gels; chemistry; physics; characterization; processing; applications

(This special issue belongs to the Section Gel Chemistry and Physics)

Advanced Gels in the Food System

edited by Xiaokang Na, Wuchao Ma and

Zihao Wei

submission deadline 31 Dec 2025 | 4 articles | Viewed by 5581 | Submission Open

Keywords: protein hydrogels; polysaccharide gels; nanogels; oleogels; food texture improvement; sustainable food development

(This special issue belongs to the Section Gel Analysis and Characterization)

Hydrogels with Appropriate/Tunable Properties for Biomedical Applications (3rd Edition)

edited by

Yanyu Yang

Yazhong Bu

and Feifei Sun

submission deadline 31 Dec 2025 | 4 articles | Viewed by 4260 | Submission Open

Keywords: functional hydrogels; biomedical applications; adhesives; smart hydrogels; medical devices; health diagnosis

(This special issue belongs to the Section Gel Applications)

Preparation, Structure-Property Relationships, and Applications of Emulsion Gels

edited by Peilong Li, Tongze Zhang, Saphwan Al-Assaf and

Liuping Fan

submission deadline 31 Dec 2025 | 2 articles | Viewed by 3850 | Submission Open

Keywords: emulsion; gel; polymer; oil; rheology; interfacial phenomena; microstructure; food structuring; bioactive delivery

(This special issue belongs to the Section Gel Analysis and Characterization)

Functional Hydrogels: Design, Processing and Biomedical Applications

edited by

Jianhao Wang

and

Cheng Wang

submission deadline 31 Dec 2025 | 2 articles | Viewed by 3506 | Submission Open

Keywords: functional hydrogels; biomedical applications; drug delivery systems; tissue engineering; 3D bioprinting; stimuli-responsive materials; regenerative medicine

(This special issue belongs to the Section Gel Applications)

Innovative Approaches of Biopolymer-Based Hydrogels: Development, Characterization, and Biomedical Applications

edited by

Camelia Elena Iurciuc-Tincu

and

Lacramioara Ochiuz

submission deadline 31 Dec 2025 | 4 articles | Viewed by 3217 | Submission Open

Keywords: hydrogels; biopolymer; sensitive hydrogels; functional hydrogels; biomaterials; synthetic materials; drug delivery; cell carrier; tissue engineering

(This special issue belongs to the Section Gel Applications)

Conductive Gels: Preparation, Properties and Applications

edited by

Konstantin Milakin

and

Pavel Gurikov

submission deadline 31 Dec 2025 | 1 articles | Viewed by 2928 | Submission Open

Keywords: hydrogels; aerogels; cryogels; composites; electronic conductivity; conducting polymers; carbon materials; conducting fillers; self-healing; stimuli-responsive behavior; sensors; energy storage; drug delivery; water purification

(This special issue belongs to the Section Gel Applications)

Recent Advances in Multi-Material Hydrogel Bioinks for 3D Bioprinting

edited by

Jiannan Li

and

Xin Jing

submission deadline 31 Dec 2025 | 1 articles | Viewed by 2810 | Submission Open

Keywords: bioprinting; multi-material bioink; biomaterials; hydrogel; tissue engineering; regenerative medicine; flexible wearable devices; health monitoring

(This special issue belongs to the Section Gel Processing and Engineering)

Synthesis and Application of Aerogel (2nd Edition)

edited by Guanglei Zhang

submission deadline 31 Dec 2025 | 2 articles | Viewed by 2762 | Submission Open

Keywords: aerogel; synthesis; property; application

(This special issue belongs to the Section Gel Analysis and Characterization)

Polymer Gels for Oil Recovery and Industry Applications

edited by Yinbo He,

Zheyu Liu

Yiqiang Li

and Jingyang Pu

submission deadline 31 Dec 2025 | 3 articles | Viewed by 2365 | Submission Open

Keywords: polymer gel; polymer flooding; enhanced oil recovery; intelligent gel; temperature resistance; salt resistance; flow behavior

(This special issue belongs to the Section Gel Applications)

Recent Advances in Multi-Functional Polymer-Based Hydrogels

edited by

Mustapha El Hariri El Nokab

and

Khaled Sebakhy

submission deadline 31 Dec 2025 | 2 articles | Viewed by 2153 | Submission Open

Keywords: multi-functional polymer-based hydrogels; biomedicine; environmental science; soft robotics; mechanical strength; self-healing properties; stimuli-responsive behavior; conductivity; bioactivity

(This special issue belongs to the Section Gel Analysis and Characterization)

Application of Gel Dosimetry

edited by Gabriele Magugliani and Eros Mossini

submission deadline 31 Dec 2025 | 3 articles | Viewed by 2056 | Submission Open

Keywords: radiotherapy; dosimetry; gel dosimetry; quality assurance; polymer gels; radiochromic gels; dosimetric phantom; radiation chemistry

(This special issue belongs to the Section Gel Chemistry and Physics)

Safety of Aerogel Materials

edited by

Zhi Li

and

Changcheng Liu

submission deadline 31 Dec 2025 | 1 articles | Viewed by 2020 | Submission Open

Keywords: aerogels; safety; safety characteristics; thermal safety; environmental impacts; process safety; occupational health risks; lifecycle assessment; safety applications

(This special issue belongs to the Section Gel Processing and Engineering)

Novel Gels for 3D Bioprinting in Tissue Engineering

edited by