Cellulosic thickener

The thickener mechanism of the cellulose thickener is the hydrophobic main chain of the cellulose thickener molecule associates with the surrounding water molecules through hydrogen bonds. The fluid volume of the polymer itself is increased, and the space for free movement of particles is reduced, thereby increasing the viscosity of the system.

Viscosity can also be increased through the entanglement of molecular chains, showing high viscosity at static and low shear, and low viscosity at high shear. This is because the cellulose molecular chains are in a disordered state at static or low shear rates, making the system highly viscous. At high shear rates, the molecules are arranged in an orderly manner parallel to the flow direction and are easy to slide with each other, so the viscosity of the system decreases.

Product representative: Hydroxypropyl Starch Ether (HPS), Sodium carboxymethyl starch (CMS)

1. Hydroxypropyl starch ether (HPS)

Basic introduction

Hydroxypropyl Starch Ether (HPS) is a white fine powder obtained from natural plants through modification, high degree of etherification reaction, and spray drying, without plasticizer. It is completely different from ordinary starch or modified starch.

Physical properties

White (colorless) powder with good fluidity and good water solubility. Its aqueous solution is transparent and colorless, with good stability. Stable to acid and alkali. The gelatinization temperature is lower than that of native starch.

The change of hot and cold viscosity is more stable than that of native starch. Mixing with salt, sucrose, etc. has no effect on viscosity. After etherification, the ice-thaw stability and transparency are improved.

Technical indicators

Appearance: white powder, easy to absorb moisture
Solubility: soluble in water and become a transparent solution
Viscosity (5% aqueous solution, 20°C): 500-20000 mPa.s
PH value (2% aqueous solution): 8-10.5

Application

1. Paper industry: Hydroxypropyl starch is used for internal sizing and surface sizing of paper. Hydroxypropyl starch makes the printing ink bright and uniform, the film is smooth, reduces ink consumption, and has a certain pulling ability.
2. Textile industry: Hydroxypropyl starch is used as warp size to improve wear resistance and weaving efficiency during weaving. Highly substituted hydroxypropyl starch can be used as printing paste.
3. Daily chemical industry: Hydroxypropyl starch is used as adhesive, suspending agent and thickener in daily chemical industry and in cosmetics or coatings.
4. Construction field: Hydroxypropyl starch can also be used as an adhesive for construction materials, a coating or a gelling agent for organic liquids.
5. Among building materials:

(1) Various types of (cement, gypsum, lime-calcium) putty for interior and exterior walls.
(2) All kinds of facing mortar and plastering mortar.
(3) Used as a forming adhesive in various gypsum, ceramic and porcelain products, with low ash content and good viscosity.
(4) It has good thickening and stability, and plays the role of suspending and emulsifying in aqueous solution.
Recommended dosage: 0.1%-0.3% (add 1.0-3.0 kg per ton)

Application Features

(1) Provide very good rapid thickening ability; medium viscosity, high water retention;
(2) The dosage is small, and a lower dosage can achieve good results;
(3) It can be used in conjunction with methyl cellulose (MC) or hydroxypropyl methyl cellulose (HPMC) to reduce the amount of cellulose ether used.
(4) Improve the anti-sagging ability of the material as a whole, so that the material does not slip when smeared or pasted with other materials.
(5) It has good lubricity, which can improve the operating performance of the material and make the operation smoother.

2. Sodium carboxymethyl starch (CMS)

• Sodium carboxymethyl starch (CMS), is the best substitute of sodium carboxymethyl cellulose (CMC).

• CMS has the functions of stability, thickening, emulsification and dispersion, cohesiveness, suspension, water retention, chelation, flocculation, excipient, leveling and ion exchange.
• CMS is widely used in food, medicine, cosmetics, toothpaste, textile, printing and dyeing, paint, paper, detergent, environmental protection, building materials, batteries, welding electrodes and oil drilling, geological drilling, mine development, natural gas exploitation and other fields.
• In addition to the functions of CMC, CMS also has the advantages of fast dissolution, large expansion ratio, low energy consumption, easy operation, and low overall cost, and has good promotion and use value.

The physical and chemical properties of CMS:

• CMS is an ionic starch ether, an important representative of starch derivatives.
• Appearance: White or yellowish free-flowing powder.
• Physical properties: non-toxic, odorless, tasteless, soluble in cold water, insoluble in ethanol, solid and aqueous solution are weakly alkaline, with good stability

CMS Specifications: