Preparation of Paper Strengthening Agent by Esterification of Cellulosic Fines

Abstract

Paper strengthening agents play an important role in the papermaking industry with the increase of secondary fiber applications. The objective of this study was to create a dry-strength agent by esterification. The fines from the pulp were collected and modified with trimesic acid and citric acid, respectively, to obtain the dry-strength agent. The influences of acid type and dosage on the enhancing effect were investigated. Compared with the control sample, the physical properties of paper sheet were improved after adding modified fines. The properties of recycled paper were also improved by the modified fines. When the dosage of citric acid agent was 7%, the effect on paper properties saw the greatest improvement. The tensile index, burst index, and folding endurance were increased by 60.3%, 18.3%, and 146.2%, respectively, compared with the control. The improvement of paper properties was due to the increase of carboxyl content in the modified fines. Based on the findings, it can be concluded that the esterification is an effective approach for producing paper drystrengthening agent.

Copper nanoparticles induced, trimesic acid grafted cellulose–an effective, non-hazardous processing approach for multifunctional textile with low chemical induction

“…Due to intermolecular attraction, the TMA molecules developed hen-cage webbed structure (Kolotuchin et al 1996) and crosslinked with cellulose through esterification (Lee et al 2003) subsequently contribute to the strength (Fig. 3) (Yan et al 2017).…”

Investigation of the efficiency and potential possibilities of paper protection by siloxan in wet environments

“…Materials based on plant polymers, in particular cellulose, have a set of valuable physical and technical properties that open up broad prospects for their functional application and for packaging and the production of structural elements [1,2]. Their special advantage lies in high ecological safety.…”

Preparation of a new dry strength agent via graft copolymerization of carboxymethyl starch

“…For example, CPAM can greatly improve the mechanical properties of paper compared with cationic starch, but it also has the disadvantages of high cost and environmental pollution in the process of production and its use. In recent years, with the promotion of environmental protection concepts, natural polysaccharides have attracted increased attention and are used as a new type of dry-strength agent and many of them need to be modified to gain noticeable contributions to strength (Wang et al 2015;Yan et al 2017;Di et al 2018). Among the existing modification methods, graft copolymerization shows particular promise as a means to generate a new product with the potential of achieving advantages of both synthetic and natural polymers; these include high dry-strength performance, possible reduction in environmental impact vs. a completely synthetic chemical, and cost-efficiency (Salimi et al 2016;Meimoun et al 2018).…”