Poly(dimethyldiallylammonium chloride) (polyDADMAC) assisted cellulase pretreatment for microfibrillated cellulose (MFC) preparation and MFC analysis

Abstract

Microfibrillated cellulose (MFC) preparation was investigated by means of cellulase pretreatment aided by poly(dimethyldiallylammonium chloride) (polyDADMAC) as an additive. The effect of polyDADMAC on the adsorption of cellulase onto the cellulose fibers, and the properties of MFC and MFC films are described. The additive improved the adsorption of cellulase onto cellulose fibers. Compared to the control, at an addition level of polyDADMAC of 0.789 ml g−1, the crystallinity, aspect ratio, the specific surface area of MFC and, the elongation at break and tensile strength of MFC films are increased, while the oxygen permeability coefficient of the MFC films is decreased. The optimal conditions for preparation of MFC by cellulase pretreatment were: pulp consistency 10%, cellulase dosage 10 µ g−1, pretreatment time 16 h and 0.789 ml g−1polyDADMAC. In summary, polyDADMAC-assisted cellulase pretreatment enhances the efficiency of the cellulase pretreatment of cellulose fibers and improves the performance of MFC and the MFC films.

Effect of substitution groups on the homopolymerization activity of methyl aryl diallyl ammonium chloride

“…With a wide range of prospective applications, particularly in the domains of petrochemicals, water treatment, personal care, biomedicine, and electrochemical materials, its homopolymers and copolymers occupy a highly special and significant position for study. [1][2][3][4][5][6][7][8][9] There is still much room for improvement in their applicable applications, particularly those involving aromatic lipophilic applications like petroleum extraction and wastewater treatment for printing and dyeing, as DMDAAC-based polymers frequently struggle with weak affinities to aliphatic substances. Currently, there are a large number of applications for lipophilicity based on aromatic rings.…”

“…The characteristic monomer of diallyl quaternary ammonium salt cationic polymers, a family of water‐soluble organic polymers with significant features, is dimethyl diallyl ammonium chloride (DMDAAC). With a wide range of prospective applications, particularly in the domains of petrochemicals, water treatment, personal care, biomedicine, and electrochemical materials, its homopolymers and copolymers occupy a highly special and significant position for study 1–9 . There is still much room for improvement in their applicable applications, particularly those involving aromatic lipophilic applications like petroleum extraction and wastewater treatment for printing and dyeing, as DMDAAC‐based polymers frequently struggle with weak affinities to aliphatic substances.…”

“…I G U R E 3 The optimized configurations of methyl aryl diallyl ammonium chloride monomer and their transition state at the B3LYP/6-31G* level. Nitrogen atom (4), Chlorine atom(25,26), carbon atom(1,2,3,5,6,7,8,9), and hydrogen atoms(remainder).was apparent that for both DMDAAC, DAMBAC, DAMMBAC, and DAMNBAC monomer molecules, the H atoms were positively charged, while the negative charges were concentrated on the Cl, N, O, and C atoms. Throughout the data on the charge distributions on the allyl carbon-carbon double bond of the four monomers, it was clear that the introduction of the aryl groups made the charge distributions gap on the double bonds larger and caused a decrease in stability.…”

Effect of Substituents on the Homopolymerization Activity of Methyl Alkyl Diallyl Ammonium Chloride

“…Water-soluble cationic polyelectrolytes are a kind of important polymers, among which the study of homopolymers and copolymers of dimethyl diallyl ammonium chloride (DMDAAC) occupies a very unique and important position. They have been widely used in water treatment, petroleum exploitation, textile printing, dyeing, the daily chemical industry, the pharmaceutical chemical industry, electrochemical materials, electronic sensors, and other fields [ 1 , 2 , 3 , 4 , 5 , 6 , 7 , 8 , 9 ]. In addition, to improve the relative molecular weight of DMDAAC-based polymers to form products with serial cationicity and relative molecular weight, in recent years, it was found that the group structure of quaternary ammonium nitrogen is directly related to its mode of action and efficiency at the phase interface, especially in some lipophilic application fields.…”

Adsorption of Cellulases on BHKP Fibers during Pretreatment for MFC Film Preparation

“…The crystallinity index (CrI) was calculated according to Turley method (equation 8). The microstructure of MFC was analyzed by the scanning electron microscopy (SEM; JEOL IT300LV, Japan) with an accelerating voltage of 10 kV (Z. J Zhang et al 2016;Z. J. Zhang et al 2018)…”