What are multiple crosslinked preformed particle gels (MC-PPGs)?

State-of-the-art multiple crosslinked preformed particle gels (MC-PPGs) were developed. MC-PPGs display exceptional resistance to temperature and salinity as well as broad pH adaptability. MC-PPGs show ultra-high plugging strength (>14 MPa/m) for open fractures/void space conduit.

What are the physicochemical properties of cross-linked polymer gels?

3.2. Tuning the Physicochemical Properties of the Gels Cross-linked polymer gels have interesting properties: strong swelling in water and nonaqueous solvents (and its mixtures), critical solution temperatures (LCST), solute partition, mass transport, and mechanical characteristics.

Can polysaccharides be cross-linked to make more open gels?

To make more open gels, branched polysaccharides (e.g., amylopectin ) could be cross-linked molecularly and chemically modified to link thermosensitive groups . We observed that PNIPAM can absorb large amounts of water and also low-molecular-weight solvents.

How to prepare polyaluminum chloride (PAC G)?

In order to overcome the drawbacks, the fresh aluminum hydroxide gels were proposed to prepare the polyaluminum chloride (PAC G) in this study. The optimal preparation condition of PAC G was obtained by optimizing the preparation conditions including temperature, time and acid concentration.

How are cross-linked gels synthesized?

Author to whom correspondence should be addressed. Cross-linked gels are synthesized by homo- and copolymerization of functionalized acrylamides. The gels swell in aqueous solution, and some of them (e.g., poly (N-isopropylacrylamide (PNIPAM)) also in organic solvents of low polarity (e.g., dichloromethane), making the gels amphiphilic materials.

Can reversibly cross-linking polymers be gelled with randomly distributed functional groups?

In conclusion, our results present valuable preliminary insights into the gelling process of reversibly cross-linking polymers with randomly distributed functional groups. The competition between intra- and intermolecular bonds leads to complex structural rearrangements purely governed by entropical contributions.