The development of bamboo self-bonding composites (BSBC) has gained growing momentum due to its formaldehyde-free nature and environmental friendliness. However, the inferior mechanical properties and poor water resistance of BSBC have hindered their practical applications. Here, we manufactured BSBC using bamboo processing residue powders as raw materials through high-consistency mechano-enzymatic (HCME) pretreatment, followed by hot pressing. Microscopic examination revealed that HCME pretreatment facilitated bamboo fiber defibrillation, generating subfibrous branches and fragmented parenchyma cells with increased specific surface areas. The mechanical interlocking structure enabled BSBC to achieve a combination of mechanical reinforcement and densification. After 8 h of HCME pretreatment, the porosity of BSBC was only 3.27%, which was 57.1% lower than that without pretreatment. BSBC also demonstrated superior water resistance and mechanical performance. It exhibited a low thickness swelling rate (5.1%), which is a 50.5% reduction compared with BSBC manufactured without HCME pretreatment. Moreover, BSBC exhibited high flexural strength (37.8 MPa) and high internal bonding strength (1.84 MPa) after 8 h of HCME pretreatment, significantly surpassing the industry standard for furniture-grade medium-density fiberboards. Environmentally friendly BSBC, based on HCME pretreatment, is anticipated to be a promising alternative to traditional fiberboards in the furniture industry.

中文翻译：

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用高稠机械酶预处理竹粉制备具有优异耐水性和机械性能的竹自粘复合材料


竹自粘复合材料 （BSBC） 由于其无甲醛性质和环境友好性而发展势头强劲。然而，BSBC 较差的机械性能和较差的耐水性阻碍了其实际应用。在这里，我们以竹加工残渣粉为原料，通过高稠机械酶 （HCME） 预处理，然后进行热压，制造了 BSBC。显微镜检查显示，HCME 预处理促进了竹纤维除颤，产生比表面积增加的亚纤维分支和碎片化薄壁细胞。机械联锁结构使 BSBC 能够实现机械加固和致密化的结合。HCME 预处理 8 h 后，BSBC 的孔隙率仅为 3.27%，比未预处理时降低 57.1%。BSBC 还表现出卓越的防水性和机械性能。它表现出较低的厚度膨胀率 （5.1%），与未进行 HCME 预处理的 BSBC 相比降低了 50.5%。此外，BSBC 在 HCME 预处理 8 h 后表现出较高的弯曲强度 （37.8 MPa） 和高内部粘合强度 （1.84 MPa），显著超过了家具级中密度纤维板的行业标准。基于 HCME 预处理的环保型 BSBC 有望成为家具行业传统纤维板的有前途的替代品。