Dynamic Wettability and Curing Character of Liquefied Bark Modified Phenol Formaldehyde Resin(BPF) on Rice Straw Surfaces
Liquefied bark modified phenol formaldehyde resin (BPF) was synthesized from liquefied larch bark and formaldehyde.The dynamic wettability of BPF resin was evaluated on the surfaces of rice straw.And the wettability was compared with resins, BPF mixed PMDI and conventional phenol formaldehyde resin A new wetting model was employed to quantify the resins” penetration performances, using parameter K value as a constant to characterize penetration rate.Meanwhile, curing kinetics of BPF resin was investigated with dynamic differential scanning calorimetry (DSC).The results showed that the K value of BPF resin was highest, followed by BPF-PMDI resin and PF resin either on the treated or untreated rice straw surfaces,which indicated better wettability of BPF resin.The activation energy of BPF was close to that of reported wood/phenol/formaldehyde resin but was higher than that of PF resin.Curing reaction was almost complete at 40% degree of conversion.
Dynamic Wettability Liquefied Larch Bark Modified Phenol Formaldehyde Resin(BPF) Curing Character Rice Straw
Ming-yu WEN, Jun-you SHI Yun-yun TANG Yang XING
Wood Science & Technology Department, Forestry College, Beihua University, Jilin City, Jilin Province, P.R.C
国内会议
北京
英文
312-316
2010-12-18（万方平台首次上网日期，不代表论文的发表时间）