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Journal articles
Magazine articles
Open Access
Lignin-based resins for kraft paper applications, TAPPI Journal November 2019

ABSTRACT: We investigated miscanthus (MS) and willow (W) lignin-furfural based resins as potential reinforce-ment agents on softwood and hardwood kraft paper. These resins might be sustainable alternatives to the commercial phenolformaldehyde (PF) resins. Phenol is a petrochemical product and formaldehyde has been classified as a carcinogen by the U.S. Environmental Protection Agency. The lignin used in this study was derived from hot water extraction (160ºC, 2 h) of MS and W biomass, and may be considered sulfur-free. These biorefinery lignins were characterized for their chemical composition and inherent properties via wet chemistry and instrumental techniques. The resin blends (MS-resin and W-resin) were characterized for their molecular weight, thermal behavior, and mechanical properties. Mechanical properties were measured by the resin’s ability to reinforce softwood and hard-wood kraft papers. The effect of adding hexamethylenetetramine (HMTA), a curing agent, to the resin was also examined. Mixtures of PF and lignin-based resins were investigated to further explore ways to reduce use of non-renewables, phenol, and carcinogenic formaldehyde. The results show that lignin-based resins have the potential to replace PF resins in kraft paper applications. For softwood paper, the highest strength was achieved using W-resin, without HMTA (2.5 times greater than PF with HMTA). For hardwood paper, MS-resin with HMTA gave the highest strength (2.3 times higher than PF with HMTA). The lignin-based resins, without HMTA, also yielded mechanical properties comparable to PF with HMTA.

Conference papers
Open Access
Recent advances in the commercialization of NIR (near-infrar

ABSTRACT: Near-infrared (NIR) spectroscopy techniques have held the promise of a new generation of online and lab based process analyzers for the pulping and recovery areas for some years now. NIR technology has been shown to be a quite effective method for the analysis of white, green and black liquors by multiple investigators. NIR reflectance techniques have been shown to be effective in predicting yield and kappa number in pulp samples. Recently, commercial analyzers have been developed for green liquor analysis on the dissolving tank, white and green liquor analysis in the recaust area and black liquor analysis on batch and continuous digesters. These analyzers are currently running at different mill sites and are proving to be superior to current technology choices for these applications. A commercial online and lab based yield and kappa number analyzer are currently being developed based on NIR reflectance techniques. Results will be presented on the performance of these analyzers relating to accuracy, maintenance and total installed cost. Other potential NIR applications in the pulping and recovery area will also be addressed.

Journal articles
Open Access
Environmentally benign psas featured at recycling symposium, TAPPI JOURNAL, February 2000, Vol. 83(2)

Environmentally benign psas featured at recycling symposium, TAPPI JOURNAL, February 2000, Vol. 83(2)

Journal articles
Open Access
CMP and ctmp of a fast-growing tropical wood: acacia mangium, TAPPI JOURNAL, July 2000, Vol. 83(7)

CMP and ctmp of a fast-growing tropical wood: acacia mangium, TAPPI JOURNAL, July 2000, Vol. 83(7)

Journal articles
Open Access
Viscosity control - a new way to improve pressure screen performance, TAPPI JOURNAL, September 2000, Vol. 83(9)

Viscosity control - a new way to improve pressure screen performance, TAPPI JOURNAL, September 2000, Vol. 83(9)

Journal articles
Open Access
Infrared analysis for process control in the pulp and paper industry, TAPPI JOURNAL, October 2000, Vol. 83(10)

Infrared analysis for process control in the pulp and paper industry, TAPPI JOURNAL, October 2000, Vol. 83(10)

Journal articles
Open Access
Application of polyallylamine as a dry strength agent for paper, TAPPI JOURNAL, December 2000, Vol. 83(12)

Application of polyallylamine as a dry strength agent for paper, TAPPI JOURNAL, December 2000, Vol. 83(12)

Journal articles
Subscription Access
Case study: power company operates Alabama mill's 'energy island', TAPPI JOURNAL, January 1998, Vol. 81(1)

Case study: power company operates alabama mill's 'energy island', TAPPI JOURNAL, January 1998, Vol. 81(1)

Open Access
IMPROVEMENT OF PULP STRENGTH AND YIELD BY COMPUTER SIMULATION OF LO-SOLIDS KRAFT COOKING, 2002 Kraft Pulp Yield Symposium (2001 TAPPI JOURNAL)

IMPROVEMENT OF PULP STRENGTH AND YIELD BY COMPUTER SIMULATION OF LO-SOLIDS KRAFT COOKING, 2002 Kraft Pulp Yield Symposium

Journal articles
Subscription Access
Non-sulfur semichemical pulping of a red oak and wheat straw mixture, TAPPI JOURNAL, May 2002, Vol. 1(3) (322KB)

Non-sulfur semichemical pulping of a red oak and wheat straw mixture, TAPPI JOURNAL, May 2002, Vol. 1(3) (322KB)

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