Coaggregation of mineral filler particles and starch granules as a basis for improving filler-fiber interaction in paper production.
The sustainable, efficient use of renewable bio-based additives in the production of various materials fits well into the concept of sustainability. Here, the concept of coaggregation of mineral filler particles and starch granules for improving filler-fiber interaction in paper-based cellulosic networks is presented. Coaggregation of precipitated calcium carbonate filler particles and uncooked, unmodified corn starch granules by cationic polyacrylamide (a cationic high molecular weight polymer flocculant) in combination with bentonite (an anionic microparticle) prior to addition to cellulosic fiber slurry delivered enhanced filler bondability with cellulosic fibers. For instance, under the conditions studied, preaggregation resulted in an increase in filler bondability factor from 9.24 to 15.21 at starch dosage of 1% (on the basis of the dry weight of papermaking stock). The swelling and gelatinization of the starch granules in starch-filler preaggregates or hybrids enabled the "bridging" of the gaps in cellulosic networks, leading to structural consolidation and strength enhancement.
Key Laboratory of Bio-based Material Science and Technology of Ministry of Education, Northeast Forestry University, Harbin 150040, China.
Ting
T
Li
Key Laboratory of Bio-based Material Science and Technology of Ministry of Education, Northeast Forestry University, Harbin 150040, China.
Jun
J
Fan
Key Laboratory of Bio-based Material Science and Technology of Ministry of Education, Northeast Forestry University, Harbin 150040, China.
Wensen
W
Chen
Key Laboratory of Bio-based Material Science and Technology of Ministry of Education, Northeast Forestry University, Harbin 150040, China.
Jiayan
J
Shu
Key Laboratory of Bio-based Material Science and Technology of Ministry of Education, Northeast Forestry University, Harbin 150040, China.
Xueren
X
Qian
Jiangsu University of Science and Technology, Zhenjiang 212003, China.
Haifeng
H
Wei
Key Laboratory of Bio-based Material Science and Technology of Ministry of Education, Northeast Forestry University, Harbin 150040, China; College of Materials and Energy, South China Agricultural University, Guangzhou 510642, China.
Qingwen
Q
Wang
Key Laboratory of Bio-based Material Science and Technology of Ministry of Education, Northeast Forestry University, Harbin 150040, China. Electronic address: jingshen.china@hotmail.com.
Jing
J
Shen
D002119:Calcium Carbonate / Q000737:chemistry; D002482:Cellulose / Q000737:chemistry; D008903:Minerals / Q000737:chemistry*; D008970:Molecular Weight; D010209:Paper; D013213:Starch / Q000737:chemistry*
D008903:Minerals; D002482:Cellulose; D013213:Starch; D002119:Calcium Carbonate
Bondability; Coaggregation; Mineral filler particles; Paper-based cellulosic networks; Starch granules; Strength enhancement