功能细菌纤维素增强LDPE及PP光热复合材料的制备与应用.pdf

的引入进一步提高了复合材料的性能，当CuS@BC含量为2wt%时，材料的拉伸性能

最佳，LDPE-CuS@BC-2wt%是LDPE（12.86MPa）拉伸强度提高的2.4倍；PP-

CuS@BC-2wt%时纯PP（18.25MPa）拉伸强度的2.44倍。光热聚烯烃材料同时具有优

异的光热转换能力，在自然光照射下拥有优异的融冰与保温性能；在1200mW的808

nm激光照射下，120s内可快速达到材料熔点温度，在氢键与配位键的双重作用下，对

不同程度的划痕损伤具有良好的自修复效果，断裂修复后材料拉伸性能可恢复70%以

上且多次循环后性能保持稳定。这种低成本、可大量制备的高强度光热复合材料在融

冰、温室大棚种植、裂痕自修复等方面具有广泛应用前景。

关键词：细菌纤维素；低密度聚乙烯；聚丙烯；硫化铜；光热转化

（PP）and

polyethylene（PE）plasticsaccountedformorethan50%oftheoutput,peoplesgrowing

consumptionlevelisnolongersatisfiedwiththetraditionalattributesofplastic,functional,

diversifiedproductsbegantobefavoredbythepublic.Bacterialcellulose（BC）isakindof

nanocellulosewithexcellentmechanicalproperties,highspecificsurfaceareaandhighaspect

ratio,andhasbeenfavoredbyresearchersasareinforcementmaterial.BChighpurity,doesnot

containimpuritiessuchasligninorhemicellulost,itsuniquethree-dimensionalstructureand

nanoform,givingithighporosity,lowdensity,largesurfaceareaandothercharacteristics,and

thedegradationtemperatureishigherthanthepolyolefinprocessingtemperature,hasnow

becomeanidealcandidateforpolyolefinreinforcedfillers,causinggreatinterestinsuchfields

asautomobiles,homeappliances,buildingmaterialsandindustrialpackagingpractitioners.In

thispaper,polyolefincompositeswithenhancedtensilepropertieswerepreparedbythemethod

oftwin-screwmeltingextrusionbyincreasingthehydrophobicityofBCsurfaceandimproving

itsdispersioninpolymermatrixwithsilanecouplingagent.BydeposingCuSonthesurfaceof

BCfiber,thepolyolefincompositehasthephotothermalconversionability:

（1）ThemodifiedBC（MBC）reinforcedpolyethylenecomposite（LDPE-MBC）

andpolypropyle