GMZ Enerji
Green Membrane Zone

Invisible materials.
Visible impact.

PFAS-free ion exchange and advanced nanofiber membranes designed for cleaner energy, water reuse, and more efficient systems.

Explore our membranesDiscuss your application
Conceptual laboratory imagery
Look beneath the system

The layer that changes what a system can do.

From a complete system to the structure of a membrane, this is where material design begins to matter.

The invisible layer

Some of the most important parts of clean technology are the ones you never see.

Inside an electrolyzer or fuel cell, a membrane can be only micrometres thick, yet influence what passes, how ions move, and how the system performs.

Conceptual sequence showing an electrolyzer system, stack, exploded cell, membrane sheet, and illustrative fibrous microstructure
SystemElectrolyzer or fuel cell
StackCells working together
CellMembrane inside each cell
MembraneThin, functional material
Micro / nano structureEngineered at a smaller scale

Conceptual electrochemical sequence; the fibrous microstructure is illustrative of the nanofiber platform, not an IEM cross-section or measured SEM image. On mobile, swipe to explore the five stages.

The challenge

Tomorrow’s technologies need better materials inside them.

Clean energy and circular water systems depend on the choices made at the material level.

Conceptual close-up of an ion exchange membrane sheet handled in a laboratory
Illustrative membrane scene
01 / ENERGY SYSTEMS

Ion exchange membranes

Material chemistry

Some conventional membrane options rely on persistent fluorinated substances.

Cost and access

Material and manufacturing choices shape the economics of adoption.

Conceptual scene of a woman examining a nanofiber membrane roll in a laboratory
Illustrative nanofiber membrane
02 / INDUSTRIAL WATER

Nanofiber membranes

Operating conditions

Flux, strength, and stability must be evaluated with the intended effluent and process.

Water reuse

Industrial effluent needs application-specific separation before reuse can be considered.

Two membrane platforms · One purpose

Designed for the challenges inside energy and water systems.

Different operating conditions call for different materials. Explore the platform that fits your application.

Conceptual laboratory scene with a thin membrane sheet and electrochemical test cell
01 / CLEAN ENERGY & ELECTROCHEMISTRY

Ion Exchange Membranes

PFAS-free membrane development for selective ion transport in hydrogen technologies, electrodialysis, flow batteries, and electrochemical research.

HYDROGENFUEL CELLSELECTRODIALYSISENERGY STORAGE
Discuss an ion exchange application ↗
Conceptual laboratory scene with a fibrous membrane and textile dye wastewater samples
02 / INDUSTRIAL WATER

Nanofiber Membranes

Functional nanofiber materials developed for industrial wastewater treatment, initially focused on textile effluent and application-specific separation needs.

TEXTILE DYESHEAVY METALSWATER REUSE RESEARCH
Explore a water pilot ↗
Invisible Materials. Visible Impact.
You may never see what we create.But you will see what it makes possible.

Cleaner hydrogen. Cleaner water. More efficient systems.
New possibilities at the material level.

One material science platform · Two challenges

Cleaner energy. Water used again.

Our two membrane families serve distinct systems, linked by the same approach to material design.

Conceptual wide view of a female engineer beside a pilot electrochemical system
Energy & electrochemistry
PFAS-free ion exchange membranes

PEM, AEM, CEM and BPM materials developed for selective ion transport in electrochemical applications.

  • Hydrogen production
  • Fuel cells
  • Electrodialysis
  • Flow batteries
  • CO₂ conversion research
Conceptual wide view of a female engineer at a textile water filtration system
Industrial water
Advanced nanofiber membranes

Functional fibrous materials tailored to the composition and treatment needs of industrial effluent.

  • Textile dyes
  • Heavy metals
  • Industrial contaminants
  • Water reuse pilots
Measured in the laboratory

Deep-tech claims need evidence.

Selected material measurements and treatment results shared by GMZ Enerji.

Conceptual photograph of an ion exchange membrane sheet by a test fixtureIllustrative membrane scene
Energy

Ion exchange membranes

Selected IEC and tensile strength measurements for PEM and AEM samples.

1.3PEM IEC · meq/g
3.2AEM IEC · meq/g
38PEM tensile strength · MPa
44AEM tensile strength · MPa
Conceptual close view of a fibrous nanofiber membraneConceptual membrane and microstructureIllustrative nanofiber microstructure detail, not a measured SEM image
Water

Nanofiber membranes

Reported laboratory removal results across tested dye and heavy metal conditions.

89–98%Dye removal range
97.5%Average heavy metal removal
Illustrative side-by-side laboratory vials with lavender-purple dyed water and visibly clear water
Illustrative laboratory scene

From textile effluent toward water reuse

Nanofiber membrane development targets dye and heavy metal removal in industrial water treatment.

Image is illustrative. The removal percentages above come from separate measurements and depend on test conditions.

Values are representative test results, not guaranteed specifications for every membrane or operating condition. Request the relevant test method, sample details, and technical brief for your application.

From material design to scale-up

Science built to meet operating reality.

01 / MATERIAL DESIGN

Engineer the material

We map the application and tune membrane chemistry, structure, thickness, and function to the properties that matter most.

02 / LABORATORY VALIDATION

Measure in the laboratory

We characterize membrane properties and evaluate transport, strength, and stability under controlled laboratory conditions.

03 / APPLICATION VALIDATION

Test in the intended system

We evaluate membranes in relevant cells, devices, or treatment setups to understand performance under application-specific conditions.

04 / INDUSTRIAL VALIDATION

Validate with industry

We work with industrial partners to plan and evaluate pilots using real operating conditions, feeds, and integration requirements.

05 / SCALE-UP

Build toward repeatable production

We develop production processes toward larger batches, consistent quality, and supply that can meet the needs of the application.

Our story

In Pursuit of the Possibilities Within the Invisible

The story of GMZ Enerji began in 2009, long before the company itself was founded.

During the final year of her Chemical Engineering studies, our founder, Dr. Gamze Karanfil Kaçmaz, was introduced to hydrogen energy and membranes while choosing the topic for her graduation thesis.

At the time, hydrogen was far from receiving the attention it does today. She was fascinated not only by this invisible energy carrier, which does not occur freely in nature, but also by the thin membranes working quietly at the heart of hydrogen systems. That curiosity marked the beginning of a scientific journey that would eventually lead to GMZ Enerji.

Dr. Gamze Karanfil Kaçmaz working at a laboratory bench during her first membrane production in 2010
Dr. Gamze Karanfil Kaçmaz · First membrane production, 2010

Her academic journey later brought her into the world of nanoparticles and, during her PhD research, nanofibers. The nanoscale world revealed something important: a small change at a scale invisible to the naked eye could create a significant impact in the visible world.

Over time, these two scientific passions converged into a single question:

What could become possible if the power of membranes were combined with the possibilities of the nanoscale world?

After years of research, another question emerged:

Why should scientific knowledge remain within the walls of a laboratory?

The ambition to see advanced materials working in real systems, addressing real problems, and turning scientific knowledge into measurable impact led to a decision to transform academic expertise into technology.

GMZ Enerji was born from that vision.

Dr. Gamze Karanfil Kaçmaz holding membrane samples in a laboratory coat beside the GMZ Enerji sign
Dr. Gamze Karanfil Kaçmaz · Membranes today

Today, we develop advanced membrane materials for energy, water, and carbon technologies. From ion exchange membranes to functional nanofiber membranes, we create new possibilities within the invisible layers that determine what systems can achieve.

Because for us, it has never been simply about producing membranes. It is about turning innovation at the material level into real-world impact.

There is also a meaningful coincidence at the heart of our story. GMZ originally began simply as an abbreviation of our founder's name. Today, it has evolved into three words that represent what we do and the future we want to help shape:

Green Membrane Zone

The curiosity that began with hydrogen and membranes in 2009 continues to live on through GMZ Enerji today. And the same question still guides us:

What else is possible within the invisible?

We look for the answer within the material itself.

GMZ Enerji
Invisible Materials. Visible Impact.
What we believe

GMZ Enerji Manifesto

Every era has been shaped by the materials that made its future possible.

Today, humanity stands at the threshold of a new future — striving for cleaner energy, more sustainable water use, and more efficient technologies.

Yet we are still designing the technologies of tomorrow within the limits of yesterday’s materials.

The components of the technologies we call clean are not always equally clean. Even today, some clean energy technologies still rely on chemicals with high environmental persistence.

And much of our water remains outside the circular economy: only 11% of treated wastewater worldwide is currently reused.1

We refuse to let these contradictions become the legacy of tomorrow’s technologies.

Because sometimes, the problem is not the system itself.
It is the material it is made of.

The world does not simply need more technology. It needs new possibilities at the material level.

Because big changes do not always begin at a large scale.

Sometimes, a layer just a few micrometers thick can transform the performance of an entire system. A tiny change at the nanoscale can create a significant impact in the visible world.

Invisible does not mean insignificant.

For us, sustainability should never mean compromising on performance. Nor should the limits of a technology be defined by the limits of the materials available today.

And science exists not only to understand, but to transform.

When an idea leaves the laboratory, addresses a real problem, and becomes a working technology, science begins to create impact.

That is why, at GMZ Enerji, we engineer change at the material level. We create new possibilities within the invisible layers that determine what systems can achieve.

At the micro and nanoscale, we engineer the chemistry, structure, and functionality of materials, transforming scientific knowledge into technologies that address real-world challenges in energy and water.

Today, we do this through PFAS-free ion exchange membranes and advanced nanofiber membranes.

But for us, it has never been simply about membranes. It is about redefining the limits of materials to expand what is possible in technology.

Cleaner energy.Reusable water.More efficient systems.Lower environmental impact.

These are big ambitions. But achieving big ambitions does not mean change must always begin somewhere big.

Sometimes it begins in a molecule.
Sometimes in a nanofiber.
Sometimes in an invisible layer only a few micrometers thick.

That is exactly where we look.

Because where others see only a material, we see a possibility yet to be realized. And we work to bring that possibility out of the laboratory and into the real world.

The future has not yet been written.
Neither have the materials that will make it possible.

We engineer the invisible.
Join us in shaping the future through what it makes possible.

GMZ Enerji
Invisible Materials. Visible Impact.

1 UNEP, Wastewater — Turning Problem to Solution (2023). Global treated wastewater reuse estimate.

Our ecosystem

Memberships, programmes and recognitions

Hydrogen Europe logo
Hydrogen Europe
EmpoWomen and Funded by the European Union logos
EmpoWomen
TİM-TEB Girişim Evi logo
TİM-TEB Girişim Evi
GCIP logo
GCIP Türkiye
İTÜ Çekirdek 2026 accelerator badge
İTÜ Çekirdek
Build the next possibility with us

Tell us what your system needs.

Membrane selection, technical collaboration, and pilot discussions start with a conversation.

Location
75. Yıl Mah. OSB Mah. Bilim Cad. No: 3/3,
Odunpazarı/Eskişehir, Türkiye
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Eskişehir, Türkiye

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