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Surface modification of calcium carbonate:A review of theories,methods and applications

Journal of Central South University 2021年第9期28卷 2589-2611页

作者： LI Chun-quan LIANG Chao CHEN Zhen-ming DI Yong-hao ZHENG Shui-lin WEI Shi SUN Zhi-ming School of Chemical and Environmental Engineering China University of Mining and Technology(Beijing)Beijing 100083China Guangxi Key Laboratory of Calcium Carbonate Resources Comprehensive Utilization College of Materials and Chemical EngineeringHezhou UniversityHezhou 542899China

Calcium carbonate,which is widely employed as a filler added into the polymer matrix,has large numbers of applications owing to the excellent properties such as low cost,non-toxicity,high natural reserves and ***,in order to obtain the good filling effect,calcium carbonate needs to be surface modified by organic molecules so as to enhance the dispersion and compatibility within the *** review paper systematically introduces the theory,methods,and applications progress of calcium carbonate with surface ***,the key factors that affect the properties of the composites as well as the current difficulties and challenges are *** current research progress and potential application prospects of calcium carbonate in the fields of plastics,rubber,paper,medicine and environmental protection are discussed as ***,this review can provide valuable reference for the modification and comprehensive utilization of calcium carbonate.

关键词： calcium carbonate surface modification polymer-based composite monolayer coating modification mechanism

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Tunable patterning of microscale particles using a surface acoustic wave device with slanted-finger interdigital transducers

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Journal of Zhejiang University-Science A(Applied Physics & Engineering) 2021年第5期22卷 331-343页

作者： Yan-cheng WANG Cheng-yao XU De-qing MEI Jia-wei LIU State Key Laboratory of Fluid Power and Mechatronic Systems Zhejiang UniversityHangzhou 310027China Key Laboratory of Advanced Manufacturing Technology of Zhejiang Province Zhejiang UniversityHangzhou 310027China School of Mechanical Engineering Zhejiang UniversityHangzhou 310027China

polymer-based materials with patterned functional particles have been used to develop smart devices with multiple *** paper presents a novel method to pattern microscale particles into biocompatible polyethylene glycol diacrylate(PEGDA)fluid through a designed surface acoustic wave(SAW)device with slanted-finger interdigital transducers(SFITs).By applying signals of different frequencies,the SFITs can excite SAWs with various wavelengths to pattern the microscale *** structural design and working principle of the SAW device with SFITs are firstly *** investigate the generation of standing SAWs and pressure field distributions of the SAW device with SFITs,a numerical model was *** results showed that different strip-shape patterned pressure fields can be generated,and the period and width of adjacent strips can be adjusted by changing the frequencies of the excitation *** were performed to verify that the microscale particles in the PEGDA solution can be successfully patterned into strip-shape patterns with various positions,periods,and *** results obtained in this study demonstrate that the developed method of using an SAW device with SFITs can be used for tunable patterning of microscale particles in solutions,and shows great potential for biomedical and microfluidic applications.

关键词： Tunable patterning Surface acoustic wave(SAW) Acoustic pressure field polymer-based composite Slanted-finger interdigital transducers(SFITs)

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