Prominent Nucleating Effect of Finely Dispersed Hydroxyl-Functional Hexagonal Boron Nitride on Biodegradable Poly(butylene succinate)
Prominent Nucleating Effect of Finely Dispersed Hydroxyl-Functional Hexagonal Boron Nitride on Biodegradable Poly(butylene succinate)
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精细分散的羟基六方氮化硼对可生物降解聚丁二酸丁二醇酯的显着成核作用
DOI：
10.1021/ie403915j
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发表时间：
2014-03-26
影响因子：
4.2
通讯作者：
Guo, Bao-Hua
中科院分区：
文献类型：
--
作者：
Tang, Yi-Ren;Lin, Da-Wei;Guo, Bao-Hua
采用超声波法制备了羟基功能化六方氮化硼纳米片（OH-BNNSs），并将其均匀分散于1，4-丁二醇（BDO）中。应用各种技术来表征OH-BNNSs及其羟基官能团。在此基础上，通过原位聚合法制备了可生物降解的聚丁二酸丁二醇酯（PBS）/OH-BNNS纳米复合材料。研究了PBS/OH-BNNS纳米复合材料中低OH-BNNS负载量对PBS的成核作用。结果表明，OH-BNNSs在不改变PBS晶体结构的情况下，显著提高了PBS的非等温结晶温度和结晶度。此外，计算的Avrami指数n等温结晶后，添加0.05重量%的OH-BNNSs从2增加到3。纳米复合材料中PBS球晶的成核密度增加。
Hydroxyl-functional hexagonal boron nitride nanosheets (OH-BNNSs) were prepared successfully by ultrasonic treatment, and then homogeneous dispersions of OH-BNNSs in 1,4-butanediol (BDO) were obtained. Various techniques were applied to characterize the OH-BNNSs and their hydroxyl functional groupd. Furthermore, biodegradable poly(butylene succinate) (PBS)/OH-BNNS nanocomposites were prepared by in situ polymerization of succinate acid (SA) and BDO containing well-dispersed OH-BNNS. The nucleating effect of low OH-BNNS loadings on PBS in the PBS/OH-BNNS nanocomposites was investigated. It is found that OH-BNNSs significantly improve the melt-crystallization temperature and degree of crystallinity of PBS during the nonisothermal crystallization process without changing the crystal structure of PBS. Moreover, the Avrami exponent n calculated for isothermal crystallization increased from 2 to 3 after the addition of 0.05 wt % OH-BNNSs. The nucleation density of PBS spherulites in the nanocomposites increased...