The amplitude of slow mode was independent of borax concentration. In the very dilute PVA concentration regime ( [PVA] < 5 g/L), the PVA di-diol-borate complexation was dominated by intra-molecular reaction, and the fast mode correlation length f which corresponds to the polymer chain ...
The effect of different PVA/borax content on viscosity 如图5 所示,随着聚乙烯醇用量的增加,在一定 范围内,体系黏度不断增加。主要原因是:聚乙烯醇 图3 pH 值对成胶体系黏度的影响 用量很少时,分子侧链中的氨基与 2D 树脂分子中 Fig.3 The effect of pH on viscosity 羟甲基的碰撞几率...
博士,副教授,硕士生导师,研究方向为绿色环保功能型纤维、纺织品及纺织复合材料Tel:18802231369 E-mail: 18802231369@163.com引用格式:王春红,林天扬,龙碧璇,等. PVA交联改性对天然纤维增强聚丙烯复合材料性能的影响[J].复合材料学报
In addition, a hydrogel made up of PVA, borax, and C-OSSPG (OSSPG loaded with curcumin) was prepared by means of the one-pot method, based on the biological effects of curcumin and the immune-activating properties of SPG. The mechanical properties and biological activity of the hydrogel ...
Qiu et al. prepared a dynamic cross-linked hydrogel (HOBP) with hydroxypropyl chitosan (HPCS) and PVA as substrates, with borax and oxidized sodium alginate (OSA) as cross-linkers. The combination of injectability, self-healing, tunable mechanics, controlled drug release, antibacterial effects, ...
Higher Mw PVA prevented the effective reaction with borax due to its fast reaction rate and low mobility; hence, the increase in mechanical strength through the borax reaction (G′ 100:0 0B vs. G′ 100:0 2B) was limited. Low Mw PVA in 50:50 0–3B series promoted the borax reaction ...
The optimal recipe for PVA/PES composite membrane preparation was as follows: PES support layer was treated with 0.1 wt.% borax aqueous solution, fully dried and then immersed into 2 wt.% PVA aqueous solution. The resulting PVA active layer was 1–1.5 μm thick after twice dip-coating. ...
The apparent activation energies of PVA and PVA/PEDOT:PSS hydrogels are 67 ±± 6 kJ/mol and 57 ±± 2 kJ/mol, respectively, which is in the range of previous studies using GA as crosslinker of PVA hydrogels and lower than for Guar-Gum/GA reaction [50,51]. These results show that ...