水再分散型纳米纤维素晶须的制备及表征

doi:10.3969/j.issn.0253-2417.2014.03.002

Abstract

Abstract: Aqueous suspensions of nanocellulose whiskers (NCW) were prepared by the sulfuric acid hydrolysis. The redispersed powders of NCW were obtained through adding a certain amount of sodium carboxymethyl cellulose (CMC-Na) to NCW suspensions and then processed by spray drying. The NCW powders were redispersed in the water and the redispersed NCW (re-NCW) were obtained. The influences of CMC-Na dosages, ultrasonic time, pH of the suspensions, and inlet temperature of the spray drying on the redispersibility of re-NCW were investigated. Then the re-NCW were characterized using several analytical techniques such as FT-IR, SEM, TEM and TGA etc. The results showed that the NCW water-redispersibility suspension were obtained with an average particle size of 170 nm and a Zeta potential of 65 mV, when the amount of CMC-Na was 6%, the ultrasonic time was 5 min, the pH value of the suspensions was 7, the inlet temperature for spray drying was 160℃, respectively.

Key words: nanocellulose whiskers, sodium carboxymethyl cellulose, water-redispered suspension

CLC Number:

TQ35

TAO Xiang-wen, YE Dai-yong. Preparation and Characterization of Water-redispersed Nanocellulose Whiskers[J]. Chemistry and Industry of Forest Products, 2014, 34(3): 7-12.

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Preparation and Characterization of Water-redispersed Nanocellulose Whiskers

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