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Detergent Purification of Membrane Proteins

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Detergents are used to purify the integral proteins of the membrane. The hydrophobic portion of the detergent can replace membrane phospholipids while solubilizing the membrane proteins. When detergent monomers reach a specific concentration in a solution called critical micelle concentration (CMC), they form micelles. Above CMC, the concentration of the detergent monomers remains in equilibrium with the micelle. The number of detergent monomers present in the CMC varies for each detergent, and...

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Updated: Jan 12, 2026

Multimodal Analysis of Microplastics in Drinking Water using a Silicon Nanomembrane Analysis Pipeline

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Published on: June 13, 2025

Membrane-based nanopurification for plastic recycling.

Jean-Philippe Laviolette¹, Ali Eslami², Jocelyn Doucet³

¹Pyrowave Inc (now operating as Emterra Innovations), Montreal, Canada. jp.laviolette@gmail.com.

Communications Chemistry

|November 1, 2025

Summary

This summary is machine-generated.

A new membrane process effectively removes over 90% of harmful additives from plastics like polystyrene. This innovative plastic purification technique significantly boosts recyclability, potentially increasing recycled plastic content from 9% to over 68.5%.

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Forming Micro-and Nano-Plastics from Agricultural Plastic Films for Employment in Fundamental Research Studies

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Area of Science:

Materials Science
Chemical Engineering
Environmental Science

Background:

Current plastic recycling methods like mechanical, dissolution, and chemical recycling face limitations in removing embedded additives and contaminants.
These limitations hinder the effective purification of waste plastics, restricting their recyclability and the quality of recycled materials.

Purpose of the Study:

To introduce and demonstrate a novel membrane-based size-exclusion process for purifying waste plastics.
To exploit the molecular size difference between polymers and common additives for efficient contaminant removal.

Main Methods:

Utilized ceramic tubular ultrafiltration membranes for a size-exclusion separation process.
Applied the membrane technology to virgin and post-consumer polystyrene (PS) to remove hexabromocyclododecane (HBCD) and polymer tailings.

Main Results:

Achieved over 90% removal of hexabromocyclododecane (HBCD) from polystyrene.
Successfully eliminated polymer tailings, which are degraded polymer chains, from the plastic samples.
Demonstrated the potential applicability to common plastics including PE, PP, PS, PVC, and PU.

Conclusions:

The membrane-based size-exclusion process offers a viable new technology for plastic purification and regeneration.
This approach significantly enhances plastic recyclability, with a potential to increase the global recycled plastic fraction from approximately 9% to over 68.5%.